[PATCH] Pageinspect - add functions on GIN and GiST indexes from gevel
Started by Alexey Chernyshovover 8 years ago15 messages
Hi all,
the following patch transfers functionality from gevel module
(http://www.sai.msu.su/~megera/wiki/Gevel) which provides functions for
analyzing GIN and GiST indexes to pageinspect. Gevel was originally
designed by Oleg Bartunov, and Teodor Sigaev for developers of GiST and
GIN indexes.
Functions added:
- gist_stat(text) - shows statistics on GiST Tree
- gist_tree(text) - shows GiST tree
- gist_tree(text, int4) - shows GiST tree up to MAXLEVEL
- gist_print(text) - prints objects stored in GiST tree
- spgist_stat(text) - shows statistics on SP-GiST
- spgist_print(text) - prints objects stored in index
- gin_value_count() - originally gin_stat(text) - prints estimated counts
for index values
- gin_stats() - originally gin_statpage(text) - shows statistics
- gin_count_estimate(text, tsquery) - shows number of indexed rows matched
query
Tests also transferred, docs for new functions are added. I run pgindent
over the code, but the result is different from those I expected, so I leave
pgindented one.
The patch is applicable to the commit
866f4a7c210857aa342bf901558d170325094dde.
--
Alexey Chernyshov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
Attachments:
0001-gevel_to_pageinspect-v1.patchtext/x-patch; name=0001-gevel_to_pageinspect-v1.patchDownload
From 31b8f699e94863012441574239576c852ea8a8a7 Mon Sep 17 00:00:00 2001
From: Alexey Chernyshov <a.chernyshov@postgrespro.ru>
Date: Fri, 21 Jul 2017 10:46:32 +0300
Subject: [PATCH] adds gevel functionality to pageinspect
---
contrib/pageinspect/Makefile | 15 +-
contrib/pageinspect/brinfuncs.c | 4 +-
contrib/pageinspect/data/rect.data | 3378 ++++++++++++
contrib/pageinspect/data/test__int.data | 7000 +++++++++++++++++++++++++
contrib/pageinspect/expected/gin.out | 317 ++
contrib/pageinspect/expected/gist.out | 18 +
contrib/pageinspect/expected/spgist.out | 120 +
contrib/pageinspect/ginfuncs.c | 589 ++-
contrib/pageinspect/gistfuncs.c | 509 ++
contrib/pageinspect/hashfuncs.c | 2 +-
contrib/pageinspect/pageinspect--1.6--1.7.sql | 57 +
contrib/pageinspect/pageinspect.control | 2 +-
contrib/pageinspect/spgistfuncs.c | 439 ++
contrib/pageinspect/sql/gin.sql | 12 +
contrib/pageinspect/sql/gist.sql | 6 +
contrib/pageinspect/sql/spgist.sql | 11 +
doc/src/sgml/pageinspect.sgml | 390 ++
17 files changed, 12843 insertions(+), 26 deletions(-)
create mode 100644 contrib/pageinspect/data/rect.data
create mode 100644 contrib/pageinspect/data/test__int.data
create mode 100644 contrib/pageinspect/expected/gist.out
create mode 100644 contrib/pageinspect/expected/spgist.out
create mode 100644 contrib/pageinspect/gistfuncs.c
create mode 100644 contrib/pageinspect/pageinspect--1.6--1.7.sql
create mode 100644 contrib/pageinspect/spgistfuncs.c
create mode 100644 contrib/pageinspect/sql/gist.sql
create mode 100644 contrib/pageinspect/sql/spgist.sql
diff --git a/contrib/pageinspect/Makefile b/contrib/pageinspect/Makefile
index 0a3cbee..f468d14 100644
--- a/contrib/pageinspect/Makefile
+++ b/contrib/pageinspect/Makefile
@@ -1,17 +1,18 @@
# contrib/pageinspect/Makefile
MODULE_big = pageinspect
-OBJS = rawpage.o heapfuncs.o btreefuncs.o fsmfuncs.o \
- brinfuncs.o ginfuncs.o hashfuncs.o $(WIN32RES)
+OBJS = rawpage.o heapfuncs.o btreefuncs.o fsmfuncs.o brinfuncs.o \
+ ginfuncs.o hashfuncs.o gistfuncs.o spgistfuncs.o $(WIN32RES)
EXTENSION = pageinspect
-DATA = pageinspect--1.5.sql pageinspect--1.5--1.6.sql \
- pageinspect--1.4--1.5.sql pageinspect--1.3--1.4.sql \
- pageinspect--1.2--1.3.sql pageinspect--1.1--1.2.sql \
- pageinspect--1.0--1.1.sql pageinspect--unpackaged--1.0.sql
+DATA = pageinspect--1.5.sql pageinspect--1.6--1.7.sql \
+ pageinspect--1.5--1.6.sql pageinspect--1.4--1.5.sql \
+ pageinspect--1.3--1.4.sql pageinspect--1.2--1.3.sql \
+ pageinspect--1.1--1.2.sql pageinspect--1.0--1.1.sql \
+ pageinspect--unpackaged--1.0.sql
PGFILEDESC = "pageinspect - functions to inspect contents of database pages"
-REGRESS = page btree brin gin hash
+REGRESS = page btree brin gin hash gist spgist
ifdef USE_PGXS
PG_CONFIG = pg_config
diff --git a/contrib/pageinspect/brinfuncs.c b/contrib/pageinspect/brinfuncs.c
index 13da761..5eb4b25 100644
--- a/contrib/pageinspect/brinfuncs.c
+++ b/contrib/pageinspect/brinfuncs.c
@@ -11,21 +11,21 @@
#include "pageinspect.h"
-#include "access/htup_details.h"
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_page.h"
#include "access/brin_revmap.h"
#include "access/brin_tuple.h"
+#include "access/htup_details.h"
#include "catalog/index.h"
#include "catalog/pg_type.h"
#include "funcapi.h"
#include "lib/stringinfo.h"
+#include "miscadmin.h"
#include "utils/array.h"
#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "utils/rel.h"
-#include "miscadmin.h"
PG_FUNCTION_INFO_V1(brin_page_type);
diff --git a/contrib/pageinspect/data/rect.data b/contrib/pageinspect/data/rect.data
new file mode 100644
index 0000000..e32b6fe
--- /dev/null
+++ b/contrib/pageinspect/data/rect.data
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diff --git a/contrib/pageinspect/data/test__int.data b/contrib/pageinspect/data/test__int.data
new file mode 100644
index 0000000..b3903d0
--- /dev/null
+++ b/contrib/pageinspect/data/test__int.data
@@ -0,0 +1,7000 @@
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+{40,203}
+{2,33,39,215,254}
+{53,69,83,224,228}
+{79,136,183,216,226,227}
+{10,109,137,163,240}
+{24,126,141}
+{69,255}
+{103,138,230,246,259,283}
+{136,290}
+{13,34,78,145,166,242}
+{38,74,83,242,294}
+{54,248,273}
+{107,162}
+{50,170,176,191,207,275}
+{32,134,166,288,292}
+{163,167,186,274,291,296}
+{31,86,123,156,160}
+{114,133,136,176,281,290}
+{105,147,211}
+{124,151,179,222,299}
+{87,101}
+{145,169,181,205,247}
+{6,266}
+{26,33,52,56,106,116}
+{19,21,65,89,104,168}
+{164,181,208}
+{36,67,92,116,248}
+{145,200,247}
+{155,215}
+{49,212}
+{29,57,105,117,131}
+{2,13,68,128,139,140}
+{193,273,273}
+{3,78,105,111,297}
+{49,142,244}
+{32,259}
+{161,205}
+{96,146,179,259}
+{44,45,211,233}
+{56,91,146,166,285}
+{87,107,120,262,299}
+{76,160,276,297}
+{248,266}
+{5,12,188,240,247}
+{164,206,293}
+{15,18,60,163}
+{53,134,172,230,287,290}
+{117,137,146,153,155}
+{72,270}
+{171,251}
+{80,125,137,141,169}
+{52,108,200,219,225,271}
+{29,78,106,221}
+{21,74,110,273}
+{28,88,98,170}
+{83,104}
+{12,152}
+{7,69,143,246,265,269}
+{62,106,157,200}
+{113,260,272,272,294}
+{16,35,80,121,165,176}
+{96,154,172,198,263}
+{29,53,109,128,129,195}
+{131,230,271,273,295,299}
+{53,160,208,231}
+{23,180,208,249,272}
+{45,208,264}
+{14,29,169}
+{116,147,272}
+{7,193,237,271}
+{158,198,253}
+{41,60,71}
+{110,133,200,249}
+{24,159,255}
+{26,39,61,114,218,229}
+{141,286,299}
+{74,278}
+{67,71,155}
+{151,257,284}
+{13,28,72,131,206}
+{60,152,275,295}
+{88,105,184,185}
+{85,190,205,256,283,285}
+{202,285}
+{14,92,160,200,246,279}
+{42,95,157,195}
+{50,99,224,276}
+{32,97,101,122}
+{66,85}
+{19,146,180,242,269,286}
+{24,86,247,274}
+{54,264,270,284}
+{72,77,85,124,127,285}
+{47,249}
+{25,73,102,237}
+{33,68,84,117,120}
+{29,62,172,240,242,273}
+{42,140,182,248,261,282}
+{118,228,284}
+{1,89,158,294}
+{29,89,122,155,208,283}
+{173,208,229}
+{6,22,142,267,299}
+{22,122,173,245,293}
diff --git a/contrib/pageinspect/expected/gin.out b/contrib/pageinspect/expected/gin.out
index 82f63b2..c4d0ef1 100644
--- a/contrib/pageinspect/expected/gin.out
+++ b/contrib/pageinspect/expected/gin.out
@@ -35,3 +35,320 @@ FROM gin_leafpage_items(get_raw_page('test1_y_idx',
-[ RECORD 1 ]
?column? | t
+\x
+CREATE TABLE test__int(a int[]);
+\copy test__int from 'data/test__int.data'
+CREATE INDEX gin_idx ON test__int USING gin ( a );
+INSERT INTO test__int ( SELECT ARRAY[t] || '{1000}'::_int4 FROM generate_series (1,300) as t );
+INSERT INTO test__int ( SELECT ARRAY[t] || '{1001}'::_int4 FROM generate_series (1,300) as t, generate_series(1,12) );
+VACUUM ANALYZE test__int;
+SELECT * FROM gin_value_count('gin_idx') as t(value int, nrow int);
+ value | nrow
+-------+------
+ 0 | 38
+ 1 | 257
+ 2 | 244
+ 3 | 222
+ 4 | 228
+ 5 | 227
+ 6 | 243
+ 7 | 238
+ 8 | 236
+ 9 | 224
+ 10 | 236
+ 11 | 248
+ 12 | 224
+ 13 | 235
+ 14 | 237
+ 15 | 253
+ 16 | 234
+ 17 | 245
+ 18 | 246
+ 19 | 234
+ 20 | 236
+ 21 | 213
+ 22 | 235
+ 23 | 222
+ 24 | 197
+ 25 | 253
+ 26 | 218
+ 27 | 239
+ 28 | 198
+ 29 | 244
+ 30 | 247
+ 31 | 267
+ 32 | 234
+ 33 | 209
+ 34 | 231
+ 35 | 218
+ 36 | 242
+ 37 | 232
+ 38 | 221
+ 39 | 232
+ 40 | 241
+ 41 | 239
+ 42 | 221
+ 43 | 211
+ 44 | 231
+ 45 | 213
+ 46 | 236
+ 47 | 264
+ 48 | 221
+ 49 | 235
+ 50 | 219
+ 51 | 250
+ 52 | 270
+ 53 | 222
+ 54 | 242
+ 55 | 237
+ 56 | 237
+ 57 | 251
+ 58 | 231
+ 59 | 272
+ 60 | 219
+ 61 | 233
+ 62 | 235
+ 63 | 260
+ 64 | 252
+ 65 | 221
+ 66 | 228
+ 67 | 253
+ 68 | 196
+ 69 | 232
+ 70 | 232
+ 71 | 223
+ 72 | 247
+ 73 | 214
+ 74 | 232
+ 75 | 229
+ 76 | 233
+ 77 | 221
+ 78 | 227
+ 79 | 233
+ 80 | 216
+ 81 | 244
+ 82 | 223
+ 83 | 254
+ 84 | 227
+ 85 | 247
+ 86 | 255
+ 87 | 239
+ 88 | 258
+ 89 | 249
+ 90 | 244
+ 91 | 226
+ 92 | 225
+ 93 | 230
+ 94 | 218
+ 95 | 232
+ 96 | 239
+ 97 | 226
+ 98 | 209
+ 99 | 211
+ 100 | 216
+ 101 | 49
+ 102 | 47
+ 103 | 59
+ 104 | 55
+ 105 | 48
+ 106 | 49
+ 107 | 49
+ 108 | 51
+ 109 | 47
+ 110 | 51
+ 111 | 45
+ 112 | 46
+ 113 | 48
+ 114 | 38
+ 115 | 39
+ 116 | 43
+ 117 | 44
+ 118 | 46
+ 119 | 45
+ 120 | 52
+ 121 | 41
+ 122 | 64
+ 123 | 50
+ 124 | 41
+ 125 | 55
+ 126 | 41
+ 127 | 50
+ 128 | 54
+ 129 | 43
+ 130 | 44
+ 131 | 50
+ 132 | 57
+ 133 | 40
+ 134 | 41
+ 135 | 44
+ 136 | 58
+ 137 | 48
+ 138 | 44
+ 139 | 50
+ 140 | 49
+ 141 | 48
+ 142 | 43
+ 143 | 36
+ 144 | 43
+ 145 | 49
+ 146 | 46
+ 147 | 40
+ 148 | 52
+ 149 | 46
+ 150 | 49
+ 151 | 42
+ 152 | 58
+ 153 | 49
+ 154 | 51
+ 155 | 49
+ 156 | 45
+ 157 | 53
+ 158 | 59
+ 159 | 38
+ 160 | 53
+ 161 | 48
+ 162 | 41
+ 163 | 40
+ 164 | 52
+ 165 | 50
+ 166 | 40
+ 167 | 48
+ 168 | 45
+ 169 | 49
+ 170 | 50
+ 171 | 45
+ 172 | 46
+ 173 | 47
+ 174 | 41
+ 175 | 51
+ 176 | 50
+ 177 | 41
+ 178 | 42
+ 179 | 48
+ 180 | 47
+ 181 | 49
+ 182 | 40
+ 183 | 46
+ 184 | 52
+ 185 | 36
+ 186 | 45
+ 187 | 41
+ 188 | 47
+ 189 | 49
+ 190 | 46
+ 191 | 45
+ 192 | 39
+ 193 | 50
+ 194 | 39
+ 195 | 54
+ 196 | 43
+ 197 | 50
+ 198 | 46
+ 199 | 42
+ 200 | 31
+ 201 | 28
+ 202 | 28
+ 203 | 28
+ 204 | 30
+ 205 | 22
+ 206 | 25
+ 207 | 27
+ 208 | 32
+ 209 | 22
+ 210 | 21
+ 211 | 31
+ 212 | 22
+ 213 | 37
+ 214 | 19
+ 215 | 25
+ 216 | 27
+ 217 | 26
+ 218 | 24
+ 219 | 25
+ 220 | 26
+ 221 | 21
+ 222 | 23
+ 223 | 20
+ 224 | 26
+ 225 | 25
+ 226 | 25
+ 227 | 23
+ 228 | 30
+ 229 | 30
+ 230 | 24
+ 231 | 22
+ 232 | 27
+ 233 | 27
+ 234 | 21
+ 235 | 27
+ 236 | 24
+ 237 | 24
+ 238 | 29
+ 239 | 32
+ 240 | 31
+ 241 | 24
+ 242 | 36
+ 243 | 21
+ 244 | 29
+ 245 | 22
+ 246 | 23
+ 247 | 21
+ 248 | 26
+ 249 | 29
+ 250 | 24
+ 251 | 29
+ 252 | 25
+ 253 | 28
+ 254 | 25
+ 255 | 19
+ 256 | 23
+ 257 | 20
+ 258 | 24
+ 259 | 31
+ 260 | 29
+ 261 | 20
+ 262 | 25
+ 263 | 23
+ 264 | 25
+ 265 | 23
+ 266 | 31
+ 267 | 22
+ 268 | 26
+ 269 | 33
+ 270 | 25
+ 271 | 27
+ 272 | 29
+ 273 | 29
+ 274 | 26
+ 275 | 28
+ 276 | 30
+ 277 | 28
+ 278 | 29
+ 279 | 22
+ 280 | 29
+ 281 | 23
+ 282 | 30
+ 283 | 29
+ 284 | 23
+ 285 | 37
+ 286 | 27
+ 287 | 31
+ 288 | 28
+ 289 | 26
+ 290 | 25
+ 291 | 29
+ 292 | 22
+ 293 | 26
+ 294 | 29
+ 295 | 24
+ 296 | 27
+ 297 | 30
+ 298 | 29
+ 299 | 26
+ 300 | 13
+ 1000 | 300
+ 1001 | 3600
+ | 9
+ | 244
+(305 rows)
+
diff --git a/contrib/pageinspect/expected/gist.out b/contrib/pageinspect/expected/gist.out
new file mode 100644
index 0000000..46e55f4
--- /dev/null
+++ b/contrib/pageinspect/expected/gist.out
@@ -0,0 +1,18 @@
+CREATE TABLE gist_table (t box);
+\copy gist_table from 'data/rect.data'
+CREATE INDEX gist_idx ON gist_table USING gist (t);
+SELECT gist_stats('gist_idx');
+ gist_stats
+-----------------------------------------
+ Number of levels: 2 +
+ Number of pages: 29 +
+ Number of leaf pages: 28 +
+ Number of tuples: 3406 +
+ Number of invalid tuples: 0 +
+ Number of leaf tuples: 3378 +
+ Total size of tuples: 143516 bytes+
+ Total size of leaf tuples: 142296 bytes+
+ Total size of index: 237568 bytes+
+
+(1 row)
+
diff --git a/contrib/pageinspect/expected/spgist.out b/contrib/pageinspect/expected/spgist.out
new file mode 100644
index 0000000..5bab22e
--- /dev/null
+++ b/contrib/pageinspect/expected/spgist.out
@@ -0,0 +1,120 @@
+CREATE TABLE spgist_table (t box);
+\copy spgist_table from 'data/rect.data'
+SELECT center(t) AS p INTO spgist_table_p FROM spgist_table;
+CREATE INDEX spgist_idx ON spgist_table_p USING spgist (p);
+CREATE INDEX kdspgist_idx ON spgist_table_p USING spgist (p kd_point_ops);
+SELECT spgist_stats('spgist_idx');
+ spgist_stats
+----------------------------------
+ totalPages: 21 +
+ deletedPages: 0 +
+ innerPages: 2 +
+ leafPages: 19 +
+ emptyPages: 0 +
+ usedSpace: 126.70 kbytes+
+ usedInnerSpace: 1.17 kbytes +
+ usedLeafSpace: 125.53 kbytes+
+ freeSpace: 40.64 kbytes +
+ fillRatio: 75.71% +
+ leafTuples: 3947 +
+ innerTuples: 20 +
+ innerAllTheSame: 0 +
+ leafPlaceholders: 569 +
+ innerPlaceholders: 0 +
+ leafRedirects: 0 +
+ innerRedirects: 0
+(1 row)
+
+SELECT * FROM spgist_print('kdspgist_idx') as t(tid tid, allthesame bool, node_n int, level int, tid_pointer tid, prefix float8, node_label int, leaf_value point);
+ tid | allthesame | node_n | level | tid_pointer | prefix | node_label | leaf_value
+----------+------------+--------+-------+-------------+---------+------------+-------------------
+ (1,1) | f | 0 | 1 | (5,1) | 23030 | |
+ (1,1) | f | 1 | 1 | (5,2) | 23030 | |
+ (5,2) | f | 0 | 2 | (5,6) | 21664 | |
+ (5,2) | f | 1 | 2 | (5,3) | 21664 | |
+ (5,3) | f | 0 | 3 | (5,5) | 37159.5 | |
+ (5,3) | f | 1 | 3 | (5,12) | 37159.5 | |
+ (5,12) | f | 0 | 4 | (5,13) | 36357.5 | |
+ (5,12) | f | 1 | 4 | (14,226) | 36357.5 | |
+ (14,226) | | | 5 | | | | (43240,47256.5)
+ (5,13) | f | 0 | 5 | (3,112) | 43507 | |
+ (5,13) | f | 1 | 5 | (5,25) | 43507 | |
+ (5,25) | f | 0 | 6 | (22,116) | 28862 | |
+ (5,25) | f | 1 | 6 | (22,115) | 28862 | |
+ (22,115) | | | 7 | | | | (30902,44532)
+ (22,116) | | | 7 | | | | (23048,47416)
+ (3,112) | | | 6 | | | | (35218.5,42124)
+ (5,5) | f | 0 | 4 | (5,11) | 33416 | |
+ (5,5) | f | 1 | 4 | (5,22) | 33416 | |
+ (5,22) | f | 0 | 5 | (20,225) | 30991 | |
+ (5,22) | f | 1 | 5 | (5,23) | 30991 | |
+ (5,23) | f | 0 | 6 | (9,112) | 41820 | |
+ (5,23) | f | 1 | 6 | (9,114) | 41820 | |
+ (9,114) | | | 7 | | | | (44732,32182)
+ (9,112) | | | 7 | | | | (35580,33526.5)
+ (20,225) | | | 6 | | | | (47724.5,27185.5)
+ (5,11) | f | 0 | 5 | (13,101) | 29986.5 | |
+ (5,11) | f | 1 | 5 | (13,100) | 29986.5 | |
+ (13,100) | | | 6 | | | | (24069,30850.5)
+ (13,101) | | | 6 | | | | (29539,25566)
+ (5,6) | f | 0 | 3 | (5,7) | 36774 | |
+ (5,6) | f | 1 | 3 | (5,19) | 36774 | |
+ (5,19) | f | 0 | 4 | (5,20) | 10075.5 | |
+ (5,19) | f | 1 | 4 | (18,225) | 10075.5 | |
+ (18,225) | | | 5 | | | | (20920.5,49105.5)
+ (5,20) | f | 0 | 5 | (10,110) | 44171.5 | |
+ (5,20) | f | 1 | 5 | (10,113) | 44171.5 | |
+ (10,113) | | | 6 | | | | (93,46797)
+ (10,110) | | | 6 | | | | (28.5,38640.5)
+ (5,7) | f | 0 | 4 | (7,113) | 9517 | |
+ (5,7) | f | 1 | 4 | (5,21) | 9517 | |
+ (5,21) | f | 0 | 5 | (19,115) | 28907.5 | |
+ (5,21) | f | 1 | 5 | (19,112) | 28907.5 | |
+ (19,112) | | | 6 | | | | (11916.5,31668)
+ (19,115) | | | 6 | | | | (20622.5,27462.5)
+ (7,113) | | | 5 | | | | (9296,35157)
+ (5,1) | f | 0 | 2 | (5,8) | 26938 | |
+ (5,1) | f | 1 | 2 | (5,4) | 26938 | |
+ (5,4) | f | 0 | 3 | (5,10) | 9532 | |
+ (5,4) | f | 1 | 3 | (5,14) | 9532 | |
+ (5,14) | f | 0 | 4 | (5,15) | 38603 | |
+ (5,14) | f | 1 | 4 | (15,222) | 38603 | |
+ (15,222) | | | 5 | | | | (41926.5,17934.5)
+ (5,15) | f | 0 | 5 | (8,113) | 16345 | |
+ (5,15) | f | 1 | 5 | (8,112) | 16345 | |
+ (8,112) | | | 6 | | | | (32425,20702.5)
+ (8,113) | | | 6 | | | | (29134,15559.5)
+ (5,10) | f | 0 | 4 | (12,94) | 38800.5 | |
+ (5,10) | f | 1 | 4 | (5,24) | 38800.5 | |
+ (5,24) | f | 0 | 5 | (21,108) | 4752 | |
+ (5,24) | f | 1 | 5 | (21,107) | 4752 | |
+ (21,107) | | | 6 | | | | (49822.5,7097.5)
+ (21,108) | | | 6 | | | | (40315.5,1689.5)
+ (12,94) | | | 5 | | | | (30295.5,5090)
+ (5,8) | f | 0 | 3 | (5,17) | 11733.5 | |
+ (5,8) | f | 1 | 3 | (5,9) | 11733.5 | |
+ (5,9) | f | 0 | 4 | (6,114) | 11993 | |
+ (5,9) | f | 1 | 4 | (5,16) | 11993 | |
+ (5,16) | f | 0 | 5 | (16,123) | 17591 | |
+ (5,16) | f | 1 | 5 | (16,127) | 17591 | |
+ (16,127) | | | 6 | | | | (18352.5,19366)
+ (16,123) | | | 6 | | | | (24795,14921)
+ (6,114) | | | 5 | | | | (6706,16676)
+ (5,17) | f | 0 | 4 | (5,18) | 13329.5 | |
+ (5,17) | f | 1 | 4 | (17,226) | 13329.5 | |
+ (17,226) | | | 5 | | | | (23690,10214.5)
+ (5,18) | f | 0 | 5 | (11,113) | 6375 | |
+ (5,18) | f | 1 | 5 | (11,109) | 6375 | |
+ (11,109) | | | 6 | | | | (5501.5,9916)
+ (11,113) | | | 6 | | | | (1072.5,4752)
+(79 rows)
+
+SELECT * FROM spgist_print('spgist_idx') as t(tid tid, allthesame bool, node_n int, level int, tid_pointer tid, prefix point, node_label int, leaf_value point) WHERE level = 1;
+ tid | allthesame | node_n | level | tid_pointer | prefix | node_label | leaf_value
+-------+------------+--------+-------+-------------+-------------------------------------+------------+------------
+ (1,1) | f | 0 | 1 | (5,4) | (24530.2070484581,23595.7092511013) | |
+ (1,1) | f | 1 | 1 | (5,3) | (24530.2070484581,23595.7092511013) | |
+ (1,1) | f | 2 | 1 | (5,2) | (24530.2070484581,23595.7092511013) | |
+ (1,1) | f | 3 | 1 | (5,1) | (24530.2070484581,23595.7092511013) | |
+(4 rows)
+
diff --git a/contrib/pageinspect/ginfuncs.c b/contrib/pageinspect/ginfuncs.c
index f774495..5f86355 100644
--- a/contrib/pageinspect/ginfuncs.c
+++ b/contrib/pageinspect/ginfuncs.c
@@ -2,11 +2,18 @@
* ginfuncs.c
* Functions to investigate the content of GIN indexes
*
+ * Source code is based on Gevel module available at
+ * (http://www.sai.msu.su/~megera/oddmuse/index.cgi/Gevel)
+ * Originally developed by:
+ * - Oleg Bartunov <oleg@sai.msu.su>, Moscow, Moscow University, Russia
+ * - Teodor Sigaev <teodor@sigaev.ru>, Moscow, Moscow University, Russia
+ *
* Copyright (c) 2014-2017, PostgreSQL Global Development Group
*
* IDENTIFICATION
* contrib/pageinspect/ginfuncs.c
*/
+
#include "postgres.h"
#include "pageinspect.h"
@@ -15,22 +22,263 @@
#include "access/gin_private.h"
#include "access/htup_details.h"
#include "catalog/namespace.h"
+#include "catalog/pg_am.h"
#include "catalog/pg_type.h"
#include "funcapi.h"
#include "miscadmin.h"
+#include "tsearch/ts_utils.h"
#include "utils/array.h"
#include "utils/builtins.h"
+#include "utils/datum.h"
+#include "utils/fmgroids.h"
#include "utils/rel.h"
+#include "utils/regproc.h"
+#include "utils/lsyscache.h"
+#include "utils/varlena.h"
+
#define DatumGetItemPointer(X) ((ItemPointer) DatumGetPointer(X))
#define ItemPointerGetDatum(X) PointerGetDatum(X)
+typedef struct GinStatState
+{
+ Relation index;
+ GinState ginstate;
+ OffsetNumber attnum;
+
+ Buffer buffer;
+ OffsetNumber offset;
+ Datum curval; /* Key */
+ GinNullCategory category;
+ Datum dvalues[2]; /* Represents tuple 0 - key; 1 - # of TIDs */
+ char nulls[2];
+} GinStatState;
+
+typedef struct gin_leafpage_items_state
+{
+ TupleDesc tupd;
+ GinPostingList *seg;
+ GinPostingList *lastseg;
+} gin_leafpage_items_state;
+
PG_FUNCTION_INFO_V1(gin_metapage_info);
PG_FUNCTION_INFO_V1(gin_page_opaque_info);
PG_FUNCTION_INFO_V1(gin_leafpage_items);
+PG_FUNCTION_INFO_V1(gin_value_count);
+PG_FUNCTION_INFO_V1(gin_count_estimate);
+PG_FUNCTION_INFO_V1(gin_stats);
+
+/*
+ * process_tuples
+ * Retrieves the number of TIDs in a tuple.
+ */
+static void
+process_tuple(FuncCallContext *funcctx, GinStatState * st, IndexTuple itup)
+{
+ MemoryContext oldcontext;
+ Datum key;
+
+ oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
+
+ key = gintuple_get_key(&st->ginstate, itup, &st->category);
+
+ if (st->category != GIN_CAT_NORM_KEY)
+ st->curval = (Datum) 0;
+ else
+ st->curval = datumCopy(
+ key,
+ st->index->rd_att->attrs[st->attnum]->attbyval,
+ st->index->rd_att->attrs[st->attnum]->attlen);
+ MemoryContextSwitchTo(oldcontext);
+
+ st->dvalues[0] = st->curval;
+
+ /* do no distiguish various null category */
+ st->nulls[0] = (st->category == GIN_CAT_NORM_KEY) ? false : true;
+
+ if (GinIsPostingTree(itup))
+ {
+ BlockNumber rootblkno = GinGetPostingTree(itup);
+ GinBtreeData btree;
+ GinBtreeStack *stack;
+ ItemPointerData minItem;
+ int nlist;
+ ItemPointer list;
+ Page page;
+ uint32 predictNumber;
+
+ LockBuffer(st->buffer, GIN_UNLOCK);
+ stack = ginScanBeginPostingTree(&btree, st->index, rootblkno, NULL);
+ page = BufferGetPage(stack->buffer);
+ ItemPointerSetMin(&minItem);
+ list = GinDataLeafPageGetItems(page, &nlist, minItem);
+ pfree(list);
+ predictNumber = stack->predictNumber;
+ st->dvalues[1] = Int32GetDatum(predictNumber * nlist);
+
+ LockBuffer(stack->buffer, GIN_UNLOCK);
+ freeGinBtreeStack(stack);
+ }
+ else
+ {
+ st->dvalues[1] = Int32GetDatum(GinGetNPosting(itup));
+ LockBuffer(st->buffer, GIN_UNLOCK);
+ }
+}
+
+static bool
+move_right_if_needed(GinStatState * st)
+{
+ Page page = BufferGetPage(st->buffer);
+
+ if (st->offset > PageGetMaxOffsetNumber(page))
+ {
+ /*
+ * We scaned the whole page, so we should take right page
+ */
+ BlockNumber blkno = GinPageGetOpaque(page)->rightlink;
+
+ if (GinPageRightMost(page))
+ return false; /* no more page */
+
+ LockBuffer(st->buffer, GIN_UNLOCK);
+ st->buffer = ReleaseAndReadBuffer(st->buffer, st->index, blkno);
+ LockBuffer(st->buffer, GIN_SHARE);
+ st->offset = FirstOffsetNumber;
+ }
+
+ return true;
+}
+
+/*
+ * refind_position
+ * Refinds a previois position, at returns it has correctly
+ * set offset and buffer is locked.
+ */
+static bool
+refind_position(GinStatState * st)
+{
+ Page page;
+
+ /* find left if needed (it causes only for first search) */
+ for (;;)
+ {
+ IndexTuple itup;
+ BlockNumber blkno;
+
+ LockBuffer(st->buffer, GIN_SHARE);
+
+ page = BufferGetPage(st->buffer);
+ if (GinPageIsLeaf(page))
+ break;
+
+ itup = (IndexTuple) PageGetItem(page,
+ PageGetItemId(page, FirstOffsetNumber));
+ blkno = GinItemPointerGetBlockNumber(&(itup)->t_tid);
+
+ LockBuffer(st->buffer, GIN_UNLOCK);
+ st->buffer = ReleaseAndReadBuffer(st->buffer, st->index, blkno);
+ }
+
+ if (st->offset == InvalidOffsetNumber)
+ {
+ return (PageGetMaxOffsetNumber(page) >= FirstOffsetNumber) ? true : false;
+ }
+
+ for (;;)
+ {
+ int cmp;
+ GinNullCategory category;
+ Datum datum;
+ IndexTuple itup;
+
+ if (move_right_if_needed(st) == false)
+ return false;
+
+ itup = (IndexTuple) PageGetItem(page, PageGetItemId(page, st->offset));
+ datum = gintuple_get_key(&st->ginstate, itup, &category);
+ cmp = ginCompareAttEntries(&st->ginstate,
+ st->attnum + 1, st->curval, st->category,
+ gintuple_get_attrnum(&st->ginstate, itup),
+ datum, category);
+ if (cmp == 0)
+ {
+ if (st->curval && !st->index->rd_att->attrs[st->attnum]->attbyval)
+ pfree((void *) st->curval);
+ return true;
+ }
+
+ st->offset++;
+ }
+
+ return false;
+}
+
+static Relation
+gin_index_open(RangeVar *relvar)
+{
+ Oid relOid = RangeVarGetRelid(relvar, NoLock, false);
+ Relation rel = index_open(relOid, AccessShareLock);
+
+ if (rel->rd_index == NULL)
+ elog(ERROR, "Relation %s.%s is not an index",
+ get_namespace_name(RelationGetNamespace(rel)),
+ RelationGetRelationName(rel)
+ );
+
+ if (rel->rd_rel->relam != GIN_AM_OID)
+ elog(ERROR, "Index %s.%s has wrong type",
+ get_namespace_name(RelationGetNamespace(rel)),
+ RelationGetRelationName(rel)
+ );
+ return rel;
+}
+
+static void
+gin_setup_firstcall(FuncCallContext *funcctx, text *name, int attnum)
+{
+ MemoryContext oldcontext;
+ GinStatState *st;
+ char *relname = text_to_cstring(name);
+ TupleDesc tupdesc;
+ oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
+
+ st = (GinStatState *) palloc(sizeof(GinStatState));
+ memset(st, 0, sizeof(GinStatState));
+ st->index = gin_index_open(
+ makeRangeVarFromNameList(stringToQualifiedNameList(relname)));
+ initGinState(&st->ginstate, st->index);
+
+ if (attnum < 0 || attnum >= st->index->rd_att->natts)
+ elog(ERROR, "Wrong column's number");
+ st->attnum = attnum;
+
+ funcctx->user_fctx = (void *) st;
+
+ tupdesc = CreateTemplateTupleDesc(2, false);
+ TupleDescInitEntry(tupdesc, 1, "value",
+ st->index->rd_att->attrs[st->attnum]->atttypid,
+ st->index->rd_att->attrs[st->attnum]->atttypmod,
+ st->index->rd_att->attrs[st->attnum]->attndims);
+ TupleDescInitEntry(tupdesc, 2, "nrow", INT4OID, -1, 0);
+
+ memset(st->nulls, false, 2 * sizeof(*st->nulls));
+
+ funcctx->slot = TupleDescGetSlot(tupdesc);
+ funcctx->attinmeta = TupleDescGetAttInMetadata(tupdesc);
+
+ MemoryContextSwitchTo(oldcontext);
+ pfree(relname);
+
+ st->offset = InvalidOffsetNumber;
+ st->buffer = ReadBuffer(st->index, GIN_ROOT_BLKNO);
+}
+/*
+ * gin_metapage_info
+ */
Datum
gin_metapage_info(PG_FUNCTION_ARGS)
{
@@ -46,7 +294,8 @@ gin_metapage_info(PG_FUNCTION_ARGS)
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
- (errmsg("must be superuser to use raw page functions"))));
+ (errmsg("must be superuser to use raw page functions")))
+ );
page = get_page_from_raw(raw_page);
@@ -56,7 +305,8 @@ gin_metapage_info(PG_FUNCTION_ARGS)
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("input page is not a GIN metapage"),
errdetail("Flags %04X, expected %04X",
- opaq->flags, GIN_META)));
+ opaq->flags, GIN_META))
+ );
/* Build a tuple descriptor for our result type */
if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
@@ -86,7 +336,9 @@ gin_metapage_info(PG_FUNCTION_ARGS)
return HeapTupleGetDatum(resultTuple);
}
-
+/*
+ * gin_page_opaque_info
+ */
Datum
gin_page_opaque_info(PG_FUNCTION_ARGS)
{
@@ -104,7 +356,8 @@ gin_page_opaque_info(PG_FUNCTION_ARGS)
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
- (errmsg("must be superuser to use raw page functions"))));
+ (errmsg("must be superuser to use raw page functions")))
+ );
page = get_page_from_raw(raw_page);
@@ -137,7 +390,8 @@ gin_page_opaque_info(PG_FUNCTION_ARGS)
if (flagbits)
{
/* any flags we don't recognize are printed in hex */
- flags[nflags++] = DirectFunctionCall1(to_hex32, Int32GetDatum(flagbits));
+ flags[nflags++] = DirectFunctionCall1(to_hex32,
+ Int32GetDatum(flagbits));
}
memset(nulls, 0, sizeof(nulls));
@@ -153,13 +407,9 @@ gin_page_opaque_info(PG_FUNCTION_ARGS)
return HeapTupleGetDatum(resultTuple);
}
-typedef struct gin_leafpage_items_state
-{
- TupleDesc tupd;
- GinPostingList *seg;
- GinPostingList *lastseg;
-} gin_leafpage_items_state;
-
+/*
+ * gin_leafpage_items
+ */
Datum
gin_leafpage_items(PG_FUNCTION_ARGS)
{
@@ -170,7 +420,8 @@ gin_leafpage_items(PG_FUNCTION_ARGS)
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
- (errmsg("must be superuser to use raw page functions"))));
+ (errmsg("must be superuser to use raw page functions")))
+ );
if (SRF_IS_FIRSTCALL())
{
@@ -190,7 +441,8 @@ gin_leafpage_items(PG_FUNCTION_ARGS)
errmsg("input page is not a valid GIN data leaf page"),
errdetail("Special size %d, expected %d",
(int) PageGetSpecialSize(page),
- (int) MAXALIGN(sizeof(GinPageOpaqueData)))));
+ (int) MAXALIGN(sizeof(GinPageOpaqueData))))
+ );
opaq = (GinPageOpaque) PageGetSpecialPointer(page);
if (opaq->flags != (GIN_DATA | GIN_LEAF | GIN_COMPRESSED))
@@ -199,7 +451,8 @@ gin_leafpage_items(PG_FUNCTION_ARGS)
errmsg("input page is not a compressed GIN data leaf page"),
errdetail("Flags %04X, expected %04X",
opaq->flags,
- (GIN_DATA | GIN_LEAF | GIN_COMPRESSED))));
+ (GIN_DATA | GIN_LEAF | GIN_COMPRESSED)))
+ );
inter_call_data = palloc(sizeof(gin_leafpage_items_state));
@@ -261,5 +514,311 @@ gin_leafpage_items(PG_FUNCTION_ARGS)
SRF_RETURN_NEXT(fctx, result);
}
else
+ {
SRF_RETURN_DONE(fctx);
+ }
+}
+
+/*
+ * gin_value_count
+ * Prints estimated counts for each indexed values.
+ */
+Datum
+gin_value_count(PG_FUNCTION_ARGS)
+{
+ FuncCallContext *funcctx;
+ GinStatState *st;
+ Datum result = (Datum) 0;
+ IndexTuple ituple;
+ HeapTuple htuple;
+ Page page;
+
+ if (SRF_IS_FIRSTCALL())
+ {
+ text *name = PG_GETARG_TEXT_P(0);
+
+ funcctx = SRF_FIRSTCALL_INIT();
+ gin_setup_firstcall(funcctx, name, (PG_NARGS() == 2) ?
+ PG_GETARG_INT32(1) : 0);
+ PG_FREE_IF_COPY(name, 0);
+ }
+
+ funcctx = SRF_PERCALL_SETUP();
+ st = (GinStatState *) (funcctx->user_fctx);
+
+ if (refind_position(st) == false)
+ {
+ UnlockReleaseBuffer(st->buffer);
+ index_close(st->index, AccessShareLock);
+
+ SRF_RETURN_DONE(funcctx);
+ }
+
+ for (;;)
+ {
+ st->offset++;
+
+ if (move_right_if_needed(st) == false)
+ {
+ UnlockReleaseBuffer(st->buffer);
+ index_close(st->index, AccessShareLock);
+
+ SRF_RETURN_DONE(funcctx);
+ }
+
+ page = BufferGetPage(st->buffer);
+ ituple = (IndexTuple) PageGetItem(page,
+ PageGetItemId(page, st->offset));
+
+ if (st->attnum + 1 == gintuple_get_attrnum(&st->ginstate, ituple))
+ break;
+ }
+
+ process_tuple(funcctx, st, ituple);
+
+ htuple = heap_form_tuple(funcctx->attinmeta->tupdesc,
+ st->dvalues,
+ st->nulls);
+ result = TupleGetDatum(funcctx->slot, htuple);
+
+ SRF_RETURN_NEXT(funcctx, result);
+}
+
+/*
+ * gin_count_estimate
+ * Outputs number of indexed rows matched query. It doesn't touch heap at
+ * all.
+ *
+ * Usage:
+ * SELECT gin_count_estimate('index_name', 'query');
+ */
+Datum
+gin_count_estimate(PG_FUNCTION_ARGS)
+{
+ text *name = PG_GETARG_TEXT_P(0);
+ Relation index;
+ IndexScanDesc scan;
+ int64 count = 0;
+ char *relname = text_to_cstring(name);
+ ScanKeyData key;
+ TIDBitmap *bitmap = tbm_create(work_mem * 1024L, NULL);
+
+ index = gin_index_open(makeRangeVarFromNameList(stringToQualifiedNameList(relname)));
+
+ if (index->rd_opcintype[0] != TSVECTOROID)
+ {
+ index_close(index, AccessShareLock);
+ elog(ERROR, "Column type is not a tsvector");
+ }
+
+ key.sk_flags = 0;
+ key.sk_attno = 1;
+ key.sk_strategy = TSearchStrategyNumber;
+ key.sk_subtype = 0;
+ key.sk_argument = PG_GETARG_DATUM(1);
+
+ fmgr_info(F_TS_MATCH_VQ, &key.sk_func);
+
+ scan = index_beginscan_bitmap(index, SnapshotSelf, 1);
+ index_rescan(scan, &key, 1, NULL, 0);
+
+ count = index_getbitmap(scan, bitmap);
+ tbm_free(bitmap);
+
+ pfree(relname);
+
+ index_endscan(scan);
+ index_close(index, AccessShareLock);
+
+ PG_RETURN_INT64(count);
+}
+
+/*
+ * gin_stat
+ * Prints various stat about index internals.
+ *
+ * Usage:
+ * SELECT * FROM gin_stat('gin_idx') as t(value int, nrow int);
+ */
+Datum
+gin_stats(PG_FUNCTION_ARGS)
+{
+ text *name = PG_GETARG_TEXT_P(0);
+ RangeVar *relvar;
+ Relation index;
+ BlockNumber blkno;
+ char res[1024];
+ uint32 totalPages,
+ deletedPages = 0,
+ emptyDataPages = 0,
+ entryPages = 0,
+ dataPages = 0,
+ dataInnerPages = 0,
+ dataLeafPages = 0,
+ entryInnerPages = 0,
+ entryLeafPages = 0;
+
+ uint64 dataInnerFreeSpace = 0,
+ dataLeafFreeSpace = 0,
+ dataInnerTuplesCount = 0,
+ dataLeafIptrsCount = 0,
+ entryInnerFreeSpace = 0,
+ entryLeafFreeSpace = 0,
+ entryInnerTuplesCount = 0,
+ entryLeafTuplesCount = 0,
+ entryPostingSize = 0,
+ entryPostingCount = 0,
+ entryAttrSize = 0;
+
+ relvar = makeRangeVarFromNameList(textToQualifiedNameList(name));
+ index = relation_openrv(relvar, AccessExclusiveLock);
+
+ if (index->rd_rel->relkind != RELKIND_INDEX ||
+ index->rd_rel->relam != GIN_AM_OID)
+ elog(ERROR, "relation \"%s\" is not a GIN index",
+ RelationGetRelationName(index));
+
+ totalPages = RelationGetNumberOfBlocks(index);
+
+ for (blkno = GIN_ROOT_BLKNO; blkno < totalPages; blkno++)
+ {
+ Buffer buffer;
+ Page page;
+ PageHeader header;
+
+ buffer = ReadBuffer(index, blkno);
+ LockBuffer(buffer, BUFFER_LOCK_SHARE);
+
+ page = BufferGetPage(buffer);
+ header = (PageHeader) page;
+
+ if (GinPageIsDeleted(page))
+ {
+ deletedPages++;
+ }
+ else if (GinPageIsData(page))
+ {
+ dataPages++;
+ if (GinPageIsLeaf(page))
+ {
+ ItemPointerData minItem,
+ *ptr;
+ int nlist;
+
+
+ dataLeafPages++;
+ dataLeafFreeSpace += header->pd_upper - header->pd_lower;
+ ItemPointerSetMin(&minItem);
+
+ ptr = GinDataLeafPageGetItems(page, &nlist, minItem);
+
+ if (ptr)
+ {
+ pfree(ptr);
+ dataLeafIptrsCount += nlist;
+ }
+ else
+ emptyDataPages++;
+ }
+ else
+ {
+ dataInnerPages++;
+ dataInnerFreeSpace += header->pd_upper - header->pd_lower;
+ dataInnerTuplesCount += GinPageGetOpaque(page)->maxoff;
+ }
+ }
+ else
+ {
+ IndexTuple itup;
+ OffsetNumber i,
+ maxoff;
+
+ maxoff = PageGetMaxOffsetNumber(page);
+
+ entryPages++;
+ if (GinPageIsLeaf(page))
+ {
+ entryLeafPages++;
+ entryLeafFreeSpace += header->pd_upper - header->pd_lower;
+ entryLeafTuplesCount += maxoff;
+ }
+ else
+ {
+ entryInnerPages++;
+ entryInnerFreeSpace += header->pd_upper - header->pd_lower;
+ entryInnerTuplesCount += maxoff;
+ }
+
+ for (i = 1; i <= maxoff; i++)
+ {
+ itup = (IndexTuple) PageGetItem(page, PageGetItemId(page, i));
+
+ if (GinPageIsLeaf(page))
+ {
+ GinPostingList *list = (GinPostingList *) GinGetPosting(itup);
+
+ entryPostingCount += GinGetNPosting(itup);
+ entryPostingSize += SizeOfGinPostingList(list);
+ entryAttrSize += GinGetPostingOffset(itup) -
+ IndexInfoFindDataOffset((itup)->t_info);
+ }
+ else
+ {
+ entryAttrSize += IndexTupleSize(itup) -
+ IndexInfoFindDataOffset((itup)->t_info);
+ }
+ }
+ }
+
+ UnlockReleaseBuffer(buffer);
+ }
+
+ index_close(index, AccessExclusiveLock);
+ totalPages--;
+
+ snprintf(res, sizeof(res),
+ "totalPages: %u\n"
+ "deletedPages: %u\n"
+ "emptyDataPages: %u\n"
+ "dataPages: %u\n"
+ "dataInnerPages: %u\n"
+ "dataLeafPages: %u\n"
+ "dataInnerFreeSpace: " INT64_FORMAT "\n"
+ "dataLeafFreeSpace: " INT64_FORMAT "\n"
+ "dataInnerTuplesCount: " INT64_FORMAT "\n"
+ "dataLeafIptrsCount: " INT64_FORMAT "\n"
+ "entryPages: %u\n"
+ "entryInnerPages: %u\n"
+ "entryLeafPages: %u\n"
+ "entryInnerFreeSpace: " INT64_FORMAT "\n"
+ "entryLeafFreeSpace: " INT64_FORMAT "\n"
+ "entryInnerTuplesCount: " INT64_FORMAT "\n"
+ "entryLeafTuplesCount: " INT64_FORMAT "\n"
+ "entryPostingSize: " INT64_FORMAT "\n"
+ "entryPostingCount: " INT64_FORMAT "\n"
+ "entryAttrSize: " INT64_FORMAT "\n"
+ ,
+ totalPages,
+ deletedPages,
+ emptyDataPages,
+ dataPages,
+ dataInnerPages,
+ dataLeafPages,
+ dataInnerFreeSpace,
+ dataLeafFreeSpace,
+ dataInnerTuplesCount,
+ dataLeafIptrsCount,
+ entryPages,
+ entryInnerPages,
+ entryLeafPages,
+ entryInnerFreeSpace,
+ entryLeafFreeSpace,
+ entryInnerTuplesCount,
+ entryLeafTuplesCount,
+ entryPostingSize,
+ entryPostingCount,
+ entryAttrSize
+ );
+
+ PG_RETURN_TEXT_P(CStringGetTextDatum(res));
}
diff --git a/contrib/pageinspect/gistfuncs.c b/contrib/pageinspect/gistfuncs.c
new file mode 100644
index 0000000..c285606
--- /dev/null
+++ b/contrib/pageinspect/gistfuncs.c
@@ -0,0 +1,509 @@
+/*
+ * gistfuncs.c
+ * Functions to investigate the content of GiST indexes
+ *
+ * Source code is based on Gevel module available at
+ * (http://www.sai.msu.su/~megera/oddmuse/index.cgi/Gevel)
+ * Originally developed by:
+ * - Oleg Bartunov <oleg@sai.msu.su>, Moscow, Moscow University, Russia
+ * - Teodor Sigaev <teodor@sigaev.ru>, Moscow, Moscow University, Russia
+ *
+ * Copyright (c) 2017, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ * contrib/pageinspect/gistfuncs.c
+ */
+
+#include "postgres.h"
+
+#include "access/gist_private.h"
+#include "access/relscan.h"
+#include "catalog/namespace.h"
+#include "catalog/pg_am.h"
+#include "catalog/pg_type.h"
+#include "funcapi.h"
+#include "utils/builtins.h"
+#include "utils/lsyscache.h"
+#include "utils/regproc.h"
+
+#define PAGESIZE (BLCKSZ - MAXALIGN(sizeof(PageHeaderData) + \
+ sizeof(ItemIdData)))
+
+/*
+ * For GiST tree dumping.
+ */
+typedef struct
+{
+ int maxlevel; /* Max level of tree to look through. */
+ text *txt;
+ char *ptr;
+ int len;
+} IdxInfo;
+
+/*
+ * For GiST tree traversal and statistics collection.
+ */
+typedef struct
+{
+ int level;
+ int numpages;
+ int numleafpages;
+ int numtuple;
+ int numinvalidtuple;
+ int numleaftuple;
+ uint64 tuplesize;
+ uint64 leaftuplesize;
+ uint64 totalsize;
+} IdxStat;
+
+/*
+ * GiST page.
+ */
+typedef struct GPItem
+{
+ Buffer buffer;
+ Page page;
+ OffsetNumber offset;
+ int level;
+ struct GPItem *next;
+} GPItem;
+
+typedef struct
+{
+ List *relname_list;
+ RangeVar *relvar;
+ Relation index;
+ Datum *dvalues;
+ bool *nulls;
+ GPItem *item;
+} TypeStorage;
+
+
+PG_FUNCTION_INFO_V1(gist_stats);
+PG_FUNCTION_INFO_V1(gist_tree);
+PG_FUNCTION_INFO_V1(gist_print);
+
+
+static Relation
+gist_index_open(RangeVar *relvar)
+{
+ Oid relOid = RangeVarGetRelid(relvar, NoLock, false);
+ Relation r = index_open(relOid, AccessExclusiveLock);
+
+ if (r->rd_index == NULL)
+ elog(ERROR, "Relation %s.%s is not an index",
+ get_namespace_name(RelationGetNamespace(r)),
+ RelationGetRelationName(r)
+ );
+
+ if (r->rd_rel->relam != GIST_AM_OID)
+ elog(ERROR, "Index %s.%s has wrong type",
+ get_namespace_name(RelationGetNamespace(r)),
+ RelationGetRelationName(r)
+ );
+
+ return r;
+}
+
+/* open_gp_page
+ * Opens GiST page.
+ */
+static GPItem *
+open_gp_page(FuncCallContext *funcctx, BlockNumber blk)
+{
+ GPItem *nitem;
+ MemoryContext oldcontext;
+ Relation index = ((TypeStorage *) (funcctx->user_fctx))->index;
+
+ oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
+ nitem = (GPItem *) palloc(sizeof(GPItem));
+ memset(nitem, 0, sizeof(GPItem));
+
+ nitem->buffer = ReadBuffer(index, blk);
+ nitem->page = (Page) BufferGetPage(nitem->buffer);
+ nitem->offset = FirstOffsetNumber;
+ nitem->next = ((TypeStorage *) (funcctx->user_fctx))->item;
+ nitem->level = (nitem->next) ? nitem->next->level + 1 : 1;
+ ((TypeStorage *) (funcctx->user_fctx))->item = nitem;
+
+ MemoryContextSwitchTo(oldcontext);
+ return nitem;
+}
+
+/*
+ * close_gp_page
+ * Close GiST page.
+ */
+static GPItem *
+close_gp_page(FuncCallContext *funcctx)
+{
+ GPItem *oitem = ((TypeStorage *) (funcctx->user_fctx))->item;
+
+ ((TypeStorage *) (funcctx->user_fctx))->item = oitem->next;
+
+ ReleaseBuffer(oitem->buffer);
+ pfree(oitem);
+ return ((TypeStorage *) (funcctx->user_fctx))->item;
+}
+
+/*
+ * gist_stattree
+ * Traverses GiST tree and collects statistics.
+ */
+static void
+gist_stattree(Relation r, int level, BlockNumber blk, OffsetNumber coff,
+ IdxStat * info)
+{
+ Buffer buffer;
+ Page page;
+ IndexTuple which;
+ ItemId iid;
+ OffsetNumber i,
+ maxoff;
+ BlockNumber cblk;
+ char *pred;
+
+ pred = (char *) palloc(sizeof(char) * level * 4 + 1);
+ MemSet(pred, ' ', level * 4);
+ pred[level * 4] = '\0';
+
+ buffer = ReadBuffer(r, blk);
+ page = (Page) BufferGetPage(buffer);
+
+ maxoff = PageGetMaxOffsetNumber(page);
+
+ info->numpages++;
+ info->tuplesize += PAGESIZE - PageGetFreeSpace(page);
+ info->totalsize += BLCKSZ;
+ info->numtuple += maxoff;
+ if (info->level < level)
+ info->level = level;
+
+ if (GistPageIsLeaf(page))
+ {
+ info->numleafpages++;
+ info->leaftuplesize += PAGESIZE - PageGetFreeSpace(page);
+ info->numleaftuple += maxoff;
+ }
+ else
+ {
+ for (i = FirstOffsetNumber; i <= maxoff; i = OffsetNumberNext(i))
+ {
+ iid = PageGetItemId(page, i);
+ which = (IndexTuple) PageGetItem(page, iid);
+ if (GistTupleIsInvalid(which))
+ info->numinvalidtuple++;
+ cblk = ItemPointerGetBlockNumber(&(which->t_tid));
+ gist_stattree(r, level + 1, cblk, i, info);
+ }
+ }
+
+ ReleaseBuffer(buffer);
+ pfree(pred);
+}
+
+/*
+ * gist_dumptree
+ * Recursively prints GiST tree.
+ */
+static void
+gist_dumptree(Relation r, int level, BlockNumber blk, OffsetNumber coff,
+ IdxInfo * info)
+{
+ Buffer buffer;
+ Page page;
+ IndexTuple which;
+ ItemId iid;
+ OffsetNumber i,
+ maxoff;
+ BlockNumber cblk;
+ char *pred;
+
+ pred = (char *) palloc(sizeof(char) * level * 4 + 1);
+ MemSet(pred, ' ', level * 4);
+ pred[level * 4] = '\0';
+
+ buffer = ReadBuffer(r, blk);
+ page = (Page) BufferGetPage(buffer);
+
+ maxoff = PageGetMaxOffsetNumber(page);
+
+
+ while ((info->ptr - ((char *) info->txt)) + level * 4 + 128 >= info->len)
+ {
+ int dist = info->ptr - ((char *) info->txt);
+
+ info->len *= 2;
+ info->txt = (text *) repalloc(info->txt, info->len);
+ info->ptr = ((char *) info->txt) + dist;
+ }
+
+ sprintf(info->ptr,
+ "%s%d(l:%d) blk: %u numTuple: %d free: %db(%.2f%%) rightlink:%u (%s)\n",
+ pred,
+ coff,
+ level,
+ blk,
+ (int) maxoff,
+ (int) PageGetFreeSpace(page),
+ 100.0 * (((float) PAGESIZE) - (float) PageGetFreeSpace(page)) /
+ ((float) PAGESIZE),
+ GistPageGetOpaque(page)->rightlink,
+ (GistPageGetOpaque(page)->rightlink == InvalidBlockNumber) ?
+ "InvalidBlockNumber" : "OK");
+ info->ptr = strchr(info->ptr, '\0');
+
+ if (!GistPageIsLeaf(page) && (info->maxlevel < 0 || level < info->maxlevel))
+ for (i = FirstOffsetNumber; i <= maxoff; i = OffsetNumberNext(i))
+ {
+ iid = PageGetItemId(page, i);
+ which = (IndexTuple) PageGetItem(page, iid);
+ cblk = ItemPointerGetBlockNumber(&(which->t_tid));
+ gist_dumptree(r, level + 1, cblk, i, info);
+ }
+ ReleaseBuffer(buffer);
+ pfree(pred);
+}
+
+/*
+ * setup_firstcall
+ * Initialization for first call of SRF.
+ */
+static void
+setup_firstcall(FuncCallContext *funcctx, text *name)
+{
+ MemoryContext oldcontext;
+ TypeStorage *st;
+ char *relname = text_to_cstring(name);
+ TupleDesc tupdesc;
+ char attname[NAMEDATALEN];
+ int i;
+
+ oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
+
+ st = (TypeStorage *) palloc(sizeof(TypeStorage));
+ memset(st, 0, sizeof(TypeStorage));
+ st->relname_list = stringToQualifiedNameList(relname);
+ st->relvar = makeRangeVarFromNameList(st->relname_list);
+ st->index = gist_index_open(st->relvar);
+ funcctx->user_fctx = (void *) st;
+
+ tupdesc = CreateTemplateTupleDesc(st->index->rd_att->natts + 2, false);
+ TupleDescInitEntry(tupdesc, 1, "level", INT4OID, -1, 0);
+ TupleDescInitEntry(tupdesc, 2, "valid", BOOLOID, -1, 0);
+ for (i = 0; i < st->index->rd_att->natts; i++)
+ {
+ sprintf(attname, "z%d", i + 2);
+ TupleDescInitEntry(
+ tupdesc,
+ i + 3,
+ attname,
+ st->index->rd_att->attrs[i]->atttypid,
+ st->index->rd_att->attrs[i]->atttypmod,
+ st->index->rd_att->attrs[i]->attndims
+ );
+ }
+
+ st->dvalues = (Datum *) palloc((tupdesc->natts + 2) * sizeof(Datum));
+ st->nulls = (char *) palloc((tupdesc->natts + 2) * sizeof(*st->nulls));
+
+ funcctx->slot = TupleDescGetSlot(tupdesc);
+ funcctx->attinmeta = TupleDescGetAttInMetadata(tupdesc);
+
+ MemoryContextSwitchTo(oldcontext);
+ pfree(relname);
+
+ st->item = open_gp_page(funcctx, GIST_ROOT_BLKNO);
+}
+
+/*
+ * close_call
+ * Clean up before SRF returns.
+ */
+static void
+close_call(FuncCallContext *funcctx)
+{
+ TypeStorage *st = (TypeStorage *) (funcctx->user_fctx);
+
+ while (st->item && close_gp_page(funcctx));
+
+ pfree(st->dvalues);
+ pfree(st->nulls);
+
+ index_close(st->index, AccessExclusiveLock);
+}
+
+/*
+ * gist_stats
+ * Returns statistics about GiST tree.
+ *
+ * Usage:
+ * select gist_stats('pix');
+ */
+Datum
+gist_stats(PG_FUNCTION_ARGS)
+{
+ text *name = PG_GETARG_TEXT_P(0);
+ char *relname = text_to_cstring(name);
+ RangeVar *relvar;
+ Relation index;
+ List *relname_list;
+ IdxStat info;
+ text *out = (text *) palloc(1024);
+ char *ptr = ((char *) out) + VARHDRSZ;
+
+
+ relname_list = stringToQualifiedNameList(relname);
+ relvar = makeRangeVarFromNameList(relname_list);
+ index = gist_index_open(relvar);
+ PG_FREE_IF_COPY(name, 0);
+
+ memset(&info, 0, sizeof(IdxStat));
+
+ gist_stattree(index, 0, GIST_ROOT_BLKNO, 0, &info);
+
+ index_close(index, AccessExclusiveLock);
+ pfree(relname);
+
+ sprintf(ptr,
+ "Number of levels: %d\n"
+ "Number of pages: %d\n"
+ "Number of leaf pages: %d\n"
+ "Number of tuples: %d\n"
+ "Number of invalid tuples: %d\n"
+ "Number of leaf tuples: %d\n"
+ "Total size of tuples: " INT64_FORMAT " bytes\n"
+ "Total size of leaf tuples: " INT64_FORMAT " bytes\n"
+ "Total size of index: " INT64_FORMAT " bytes\n",
+ info.level + 1,
+ info.numpages,
+ info.numleafpages,
+ info.numtuple,
+ info.numinvalidtuple,
+ info.numleaftuple,
+ info.tuplesize,
+ info.leaftuplesize,
+ info.totalsize);
+
+ ptr = strchr(ptr, '\0');
+
+ SET_VARSIZE(out, ptr - ((char *) out));
+ PG_RETURN_POINTER(out);
+}
+
+/*
+ * gist_tree
+ * Show GiST tree.
+ *
+ * Usage:
+ * SELECT gist_tree('gist_idx');
+ */
+Datum
+gist_tree(PG_FUNCTION_ARGS)
+{
+ text *name = PG_GETARG_TEXT_P(0);
+ char *relname = text_to_cstring(name);
+ RangeVar *relvar;
+ Relation index;
+ List *relname_list;
+ IdxInfo info;
+
+ relname_list = stringToQualifiedNameList(relname);
+ relvar = makeRangeVarFromNameList(relname_list);
+ index = gist_index_open(relvar);
+ PG_FREE_IF_COPY(name, 0);
+
+ info.maxlevel = (PG_NARGS() > 1) ? PG_GETARG_INT32(1) : -1;
+ info.len = 1024;
+ info.txt = (text *) palloc(info.len);
+ info.ptr = ((char *) info.txt) + VARHDRSZ;
+
+ gist_dumptree(index, 0, GIST_ROOT_BLKNO, 0, &info);
+
+ index_close(index, AccessExclusiveLock);
+ pfree(relname);
+
+ SET_VARSIZE(info.txt, info.ptr - ((char *) info.txt));
+ PG_RETURN_POINTER(info.txt);
+}
+
+/*
+ * gist_print
+ * Prints objects stored in GiST tree, works only if objects in index have
+ * textual representation (type_out functions should be implemented for
+ * given object type).
+ *
+ * Usage:
+ * SELECT * FROM gist_print('gist_idx') as t(level int, valid bool, a box);
+ */
+Datum
+gist_print(PG_FUNCTION_ARGS)
+{
+ FuncCallContext *funcctx;
+ TypeStorage *st;
+ Datum result = (Datum) 0;
+ ItemId iid;
+ IndexTuple ituple;
+ HeapTuple htuple;
+ int i;
+ bool isnull;
+
+ if (SRF_IS_FIRSTCALL())
+ {
+ text *name = PG_GETARG_TEXT_P(0);
+
+ funcctx = SRF_FIRSTCALL_INIT();
+ setup_firstcall(funcctx, name);
+ PG_FREE_IF_COPY(name, 0);
+ }
+
+ funcctx = SRF_PERCALL_SETUP();
+ st = (TypeStorage *) (funcctx->user_fctx);
+
+ if (!st->item)
+ {
+ close_call(funcctx);
+ SRF_RETURN_DONE(funcctx);
+ }
+
+ while (st->item->offset > PageGetMaxOffsetNumber(st->item->page))
+ {
+ if (!close_gp_page(funcctx))
+ {
+ close_call(funcctx);
+ SRF_RETURN_DONE(funcctx);
+ }
+ }
+
+ iid = PageGetItemId(st->item->page, st->item->offset);
+ ituple = (IndexTuple) PageGetItem(st->item->page, iid);
+
+ st->dvalues[0] = Int32GetDatum(st->item->level);
+ st->nulls[0] = false;
+ st->dvalues[1] = BoolGetDatum((!GistPageIsLeaf(st->item->page) &&
+ GistTupleIsInvalid(ituple)) ? false : true);
+ st->nulls[1] = false;
+ for (i = 2; i < funcctx->attinmeta->tupdesc->natts; i++)
+ {
+ if (!GistPageIsLeaf(st->item->page) && GistTupleIsInvalid(ituple))
+ {
+ st->dvalues[i] = (Datum) 0;
+ st->nulls[i] = true;
+ }
+ else
+ {
+ st->dvalues[i] = index_getattr(ituple, i - 1, st->index->rd_att,
+ &isnull);
+ st->nulls[i] = (isnull) ? true : false;
+ }
+ }
+
+ htuple = heap_form_tuple(funcctx->attinmeta->tupdesc, st->dvalues,
+ st->nulls);
+ result = TupleGetDatum(funcctx->slot, htuple);
+ st->item->offset = OffsetNumberNext(st->item->offset);
+ if (!GistPageIsLeaf(st->item->page))
+ open_gp_page(funcctx, ItemPointerGetBlockNumber(&(ituple->t_tid)));
+
+ SRF_RETURN_NEXT(funcctx, result);
+}
diff --git a/contrib/pageinspect/hashfuncs.c b/contrib/pageinspect/hashfuncs.c
index dbe3b6a..9597631 100644
--- a/contrib/pageinspect/hashfuncs.c
+++ b/contrib/pageinspect/hashfuncs.c
@@ -14,8 +14,8 @@
#include "access/hash.h"
#include "access/htup_details.h"
-#include "catalog/pg_type.h"
#include "catalog/pg_am.h"
+#include "catalog/pg_type.h"
#include "funcapi.h"
#include "miscadmin.h"
#include "utils/builtins.h"
diff --git a/contrib/pageinspect/pageinspect--1.6--1.7.sql b/contrib/pageinspect/pageinspect--1.6--1.7.sql
new file mode 100644
index 0000000..fc9d096
--- /dev/null
+++ b/contrib/pageinspect/pageinspect--1.6--1.7.sql
@@ -0,0 +1,57 @@
+/* contrib/pageinspect/pageinspect--1.6--1.7.sql */
+
+-- complain if script is sourced in psql, rather than via ALTER EXTENSION
+\echo Use "ALTER EXTENSION pageinspect UPDATE TO '1.7'" to load this file. \quit
+
+-- GiST
+CREATE FUNCTION gist_stats(text)
+RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+CREATE FUNCTION gist_tree(text)
+RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+CREATE FUNCTION gist_tree(text, int4)
+RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+CREATE FUNCTION gist_print(text)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+-- SP-GiST
+CREATE FUNCTION spgist_stats(text)
+RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+CREATE FUNCTION spgist_print(text)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+-- GIN
+CREATE FUNCTION gin_value_count(text)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+CREATE FUNCTION gin_value_count(text, int)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+CREATE FUNCTION gin_stats(text)
+RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+CREATE FUNCTION gin_count_estimate(text, tsquery)
+RETURNS bigint
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
diff --git a/contrib/pageinspect/pageinspect.control b/contrib/pageinspect/pageinspect.control
index 1a61c9f..dcfc61f 100644
--- a/contrib/pageinspect/pageinspect.control
+++ b/contrib/pageinspect/pageinspect.control
@@ -1,5 +1,5 @@
# pageinspect extension
comment = 'inspect the contents of database pages at a low level'
-default_version = '1.6'
+default_version = '1.7'
module_pathname = '$libdir/pageinspect'
relocatable = true
diff --git a/contrib/pageinspect/spgistfuncs.c b/contrib/pageinspect/spgistfuncs.c
new file mode 100644
index 0000000..c5da323
--- /dev/null
+++ b/contrib/pageinspect/spgistfuncs.c
@@ -0,0 +1,439 @@
+/*
+ * spgistfuncs.c
+ * Functions to investigate the content of SP-GiST indexes
+ *
+ * Source code is based on Gevel module available at
+ * (http://www.sai.msu.su/~megera/oddmuse/index.cgi/Gevel)
+ * Originally developed by:
+ * - Oleg Bartunov <oleg@sai.msu.su>, Moscow, Moscow University, Russia
+ * - Teodor Sigaev <teodor@sigaev.ru>, Moscow, Moscow University, Russia
+ *
+ * Copyright (c) 2017, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ * contrib/pageinspect/spgistfuncs.c
+ */
+
+#include "postgres.h"
+
+#include "access/gist_private.h"
+#include "access/spgist_private.h"
+#include "access/relscan.h"
+#include "catalog/namespace.h"
+#include "catalog/pg_am.h"
+#include "catalog/pg_type.h"
+#include "funcapi.h"
+#include "miscadmin.h"
+#include "utils/builtins.h"
+#include "utils/datum.h"
+#include "utils/varlena.h"
+
+typedef struct SPGistPrintStackElem
+{
+ ItemPointerData iptr;
+ int16 nlabel;
+ int level;
+} SPGistPrintStackElem;
+
+typedef struct SPGistPrint
+{
+ SpGistState state;
+ Relation index;
+ Datum dvalues[8 /* see CreateTemplateTupleDesc call */ ];
+ char nulls[8 /* see CreateTemplateTupleDesc call */ ];
+ List *stack;
+} SPGistPrint;
+
+#define IsIndex(r) ((r)->rd_rel->relkind == RELKIND_INDEX)
+#define IsSpGist(r) ((r)->rd_rel->relam == SPGIST_AM_OID)
+
+static void
+pushSPGistPrint(FuncCallContext *funcctx, SPGistPrint * prst, ItemPointer ip,
+ int level)
+{
+ MemoryContext oldcontext;
+ SPGistPrintStackElem *e;
+
+ oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
+
+ e = palloc(sizeof(*e));
+ e->iptr = *ip;
+ e->nlabel = 0;
+ e->level = level;
+ prst->stack = lcons(e, prst->stack);
+
+ MemoryContextSwitchTo(oldcontext);
+}
+
+static void
+close_spgist_print(SPGistPrint * prst)
+{
+ index_close(prst->index, AccessExclusiveLock);
+}
+
+PG_FUNCTION_INFO_V1(spgist_stats);
+PG_FUNCTION_INFO_V1(spgist_print);
+
+/*
+ * spgist_stats
+ * Show statistics about SP-GiST tree.
+ *
+ * Usage:
+ * SELECT spgist_stats('spgist_idx');
+ */
+Datum
+spgist_stats(PG_FUNCTION_ARGS)
+{
+ text *name = PG_GETARG_TEXT_P(0);
+ RangeVar *relvar;
+ Relation index;
+ BlockNumber blkno;
+ BlockNumber totalPages = 0,
+ innerPages = 0,
+ leafPages = 0,
+ emptyPages = 0,
+ deletedPages = 0;
+ double usedSpace = 0.0,
+ usedLeafSpace = 0.0,
+ usedInnerSpace = 0.0;
+ char res[1024];
+ int bufferSize = -1;
+ int64 innerTuples = 0,
+ leafTuples = 0,
+ nAllTheSame = 0,
+ nLeafPlaceholder = 0,
+ nInnerPlaceholder = 0,
+ nLeafRedirect = 0,
+ nInnerRedirect = 0;
+
+ relvar = makeRangeVarFromNameList(textToQualifiedNameList(name));
+ index = relation_openrv(relvar, AccessExclusiveLock);
+
+ if (!IsIndex(index) || !IsSpGist(index))
+ elog(ERROR, "relation \"%s\" is not an SPGiST index",
+ RelationGetRelationName(index));
+
+ totalPages = RelationGetNumberOfBlocks(index);
+
+ for (blkno = SPGIST_ROOT_BLKNO; blkno < totalPages; blkno++)
+ {
+ Buffer buffer;
+ Page page;
+ int pageFree;
+
+ buffer = ReadBuffer(index, blkno);
+ LockBuffer(buffer, BUFFER_LOCK_SHARE);
+
+ page = BufferGetPage(buffer);
+
+ if (PageIsNew(page) || SpGistPageIsDeleted(page))
+ {
+ deletedPages++;
+ UnlockReleaseBuffer(buffer);
+ continue;
+ }
+
+ if (SpGistPageIsLeaf(page))
+ {
+ leafPages++;
+ leafTuples += PageGetMaxOffsetNumber(page);
+ nLeafPlaceholder += SpGistPageGetOpaque(page)->nPlaceholder;
+ nLeafRedirect += SpGistPageGetOpaque(page)->nRedirection;
+ }
+ else
+ {
+ int i,
+ max;
+
+ innerPages++;
+ max = PageGetMaxOffsetNumber(page);
+ innerTuples += max;
+ nInnerPlaceholder += SpGistPageGetOpaque(page)->nPlaceholder;
+ nInnerRedirect += SpGistPageGetOpaque(page)->nRedirection;
+ for (i = FirstOffsetNumber; i <= max; i++)
+ {
+ SpGistInnerTuple it;
+
+ it = (SpGistInnerTuple) PageGetItem(page,
+ PageGetItemId(page, i));
+ if (it->allTheSame)
+ nAllTheSame++;
+ }
+ }
+
+ if (bufferSize < 0)
+ bufferSize = BufferGetPageSize(buffer)
+ - MAXALIGN(sizeof(SpGistPageOpaqueData))
+ - SizeOfPageHeaderData;
+
+ pageFree = PageGetExactFreeSpace(page);
+
+ usedSpace += bufferSize - pageFree;
+ if (SpGistPageIsLeaf(page))
+ usedLeafSpace += bufferSize - pageFree;
+ else
+ usedInnerSpace += bufferSize - pageFree;
+
+ if (pageFree == bufferSize)
+ emptyPages++;
+
+ UnlockReleaseBuffer(buffer);
+ }
+
+ index_close(index, AccessExclusiveLock);
+
+ totalPages--; /* discount metapage */
+
+ snprintf(res, sizeof(res),
+ "totalPages: %u\n"
+ "deletedPages: %u\n"
+ "innerPages: %u\n"
+ "leafPages: %u\n"
+ "emptyPages: %u\n"
+ "usedSpace: %.2f kbytes\n"
+ "usedInnerSpace: %.2f kbytes\n"
+ "usedLeafSpace: %.2f kbytes\n"
+ "freeSpace: %.2f kbytes\n"
+ "fillRatio: %.2f%%\n"
+ "leafTuples: " INT64_FORMAT "\n"
+ "innerTuples: " INT64_FORMAT "\n"
+ "innerAllTheSame: " INT64_FORMAT "\n"
+ "leafPlaceholders: " INT64_FORMAT "\n"
+ "innerPlaceholders: " INT64_FORMAT "\n"
+ "leafRedirects: " INT64_FORMAT "\n"
+ "innerRedirects: " INT64_FORMAT,
+ totalPages, deletedPages, innerPages, leafPages, emptyPages,
+ usedSpace / 1024.0,
+ usedInnerSpace / 1024.0,
+ usedLeafSpace / 1024.0,
+ (((double) bufferSize) * ((double) totalPages) - usedSpace) / 1024,
+ 100.0 * (usedSpace / (((double) bufferSize) * ((double) totalPages))),
+ leafTuples, innerTuples, nAllTheSame,
+ nLeafPlaceholder, nInnerPlaceholder,
+ nLeafRedirect, nInnerRedirect);
+
+ PG_RETURN_TEXT_P(CStringGetTextDatum(res));
+}
+
+/*
+ * spgist_print
+ * Prints objects stored in GiST tree, works only if objects in index have
+ * textual representation (type_out functions should be implemented for given
+ * object type).
+ */
+Datum
+spgist_print(PG_FUNCTION_ARGS)
+{
+ FuncCallContext *funcctx;
+ SPGistPrint *prst;
+ SPGistPrintStackElem *s;
+ HeapTuple htuple;
+ Datum result;
+ MemoryContext oldcontext;
+
+ if (SRF_IS_FIRSTCALL())
+ {
+ text *name = PG_GETARG_TEXT_P(0);
+ RangeVar *relvar;
+ Relation index;
+ ItemPointerData ipd;
+ TupleDesc tupdesc;
+
+ funcctx = SRF_FIRSTCALL_INIT();
+ relvar = makeRangeVarFromNameList(textToQualifiedNameList(name));
+ index = relation_openrv(relvar, AccessExclusiveLock);
+
+ if (!IsIndex(index) || !IsSpGist(index))
+ elog(ERROR, "relation \"%s\" is not an SPGiST index",
+ RelationGetRelationName(index));
+
+ oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
+
+ prst = palloc(sizeof(*prst));
+
+ prst->index = index;
+ initSpGistState(&prst->state, index);
+
+ tupdesc = CreateTemplateTupleDesc(3 /* types */ + 1 /* level */ +
+ 1 /* nlabel */ + 2 /* tids */ +
+ 1, false);
+ TupleDescInitEntry(tupdesc, 1, "tid", TIDOID, -1, 0);
+ TupleDescInitEntry(tupdesc, 2, "allthesame", BOOLOID, -1, 0);
+ TupleDescInitEntry(tupdesc, 3, "node", INT4OID, -1, 0);
+ TupleDescInitEntry(tupdesc, 4, "level", INT4OID, -1, 0);
+ TupleDescInitEntry(tupdesc, 5, "tid_pointer", TIDOID, -1, 0);
+ TupleDescInitEntry(tupdesc, 6, "prefix",
+ (prst->state.attPrefixType.type == VOIDOID) ? INT4OID
+ : prst->state.attPrefixType.type,
+ -1, 0);
+ TupleDescInitEntry(tupdesc, 7, "label",
+ (prst->state.attLabelType.type == VOIDOID) ? INT4OID
+ : prst->state.attLabelType.type,
+ -1, 0);
+ TupleDescInitEntry(tupdesc, 8, "leaf",
+ (prst->state.attType.type == VOIDOID) ? INT4OID
+ : prst->state.attType.type,
+ -1, 0);
+
+ funcctx->slot = TupleDescGetSlot(tupdesc);
+ funcctx->attinmeta = TupleDescGetAttInMetadata(tupdesc);
+
+ funcctx->user_fctx = (void *) prst;
+
+ MemoryContextSwitchTo(oldcontext);
+
+ ItemPointerSet(&ipd, SPGIST_ROOT_BLKNO, FirstOffsetNumber);
+ prst->stack = NIL;
+ pushSPGistPrint(funcctx, prst, &ipd, 1);
+
+ PG_FREE_IF_COPY(name, 0);
+ }
+
+ funcctx = SRF_PERCALL_SETUP();
+ prst = (SPGistPrint *) (funcctx->user_fctx);
+
+next:
+ for (;;)
+ {
+ if (prst->stack == NIL)
+ {
+ close_spgist_print(prst);
+ SRF_RETURN_DONE(funcctx);
+ }
+
+ CHECK_FOR_INTERRUPTS();
+
+ s = (SPGistPrintStackElem *) linitial(prst->stack);
+ prst->stack = list_delete_first(prst->stack);
+
+ if (ItemPointerIsValid(&s->iptr))
+ break;
+ free(s);
+ }
+
+ do
+ {
+ Buffer buffer;
+ Page page;
+ SpGistDeadTuple dtuple;
+ ItemPointer tid;
+
+ buffer = ReadBuffer(prst->index, ItemPointerGetBlockNumber(&s->iptr));
+ LockBuffer(buffer, BUFFER_LOCK_SHARE);
+
+ page = BufferGetPage(buffer);
+ if (ItemPointerGetOffsetNumber(&s->iptr) > PageGetMaxOffsetNumber(page))
+ {
+ UnlockReleaseBuffer(buffer);
+ pfree(s);
+ goto next;
+ }
+
+ dtuple = (SpGistDeadTuple) PageGetItem(page,
+ PageGetItemId(page,
+ ItemPointerGetOffsetNumber(&s->iptr)));
+
+ if (dtuple->tupstate != SPGIST_LIVE)
+ {
+ UnlockReleaseBuffer(buffer);
+ pfree(s);
+ goto next;
+ }
+
+ if (SpGistPageIsLeaf(page))
+ {
+ SpGistLeafTuple leafTuple = (SpGistLeafTuple) dtuple;
+
+ tid = palloc(sizeof(ItemPointerData));
+ *tid = s->iptr;
+ prst->dvalues[0] = PointerGetDatum(tid);
+ prst->nulls[0] = false;
+ prst->nulls[1] = true;
+ prst->nulls[2] = true;
+ prst->dvalues[3] = s->level;
+ prst->nulls[3] = false;
+ prst->nulls[4] = true;
+ prst->nulls[5] = true;
+ prst->nulls[6] = true;
+ prst->dvalues[7] = datumCopy(SGLTDATUM(leafTuple, &prst->state),
+ prst->state.attType.attbyval,
+ prst->state.attType.attlen);
+ prst->nulls[7] = false;
+ }
+ else
+ {
+ SpGistInnerTuple innerTuple = (SpGistInnerTuple) dtuple;
+ int i;
+ SpGistNodeTuple node;
+
+ SGITITERATE(innerTuple, i, node)
+ {
+ if (ItemPointerIsValid(&node->t_tid))
+ {
+ if (i >= s->nlabel)
+ break;
+ }
+ }
+
+ if (i >= innerTuple->nNodes)
+ {
+ UnlockReleaseBuffer(buffer);
+ pfree(s);
+ goto next;
+
+ }
+
+ tid = palloc(sizeof(ItemPointerData));
+ *tid = s->iptr;
+ prst->dvalues[0] = PointerGetDatum(tid);
+ prst->nulls[0] = false;
+ prst->dvalues[1] = innerTuple->allTheSame;
+ prst->nulls[1] = false;
+ prst->dvalues[2] = Int32GetDatum(s->nlabel);
+ prst->nulls[2] = false;
+ prst->dvalues[3] = s->level;
+ prst->nulls[3] = false;
+ tid = palloc(sizeof(ItemPointerData));
+ *tid = node->t_tid;
+ prst->dvalues[4] = PointerGetDatum(tid);
+ prst->nulls[4] = false;
+ if (innerTuple->prefixSize > 0)
+ {
+ prst->dvalues[5] = datumCopy(SGITDATUM(innerTuple, &prst->state),
+ prst->state.attPrefixType.attbyval,
+ prst->state.attPrefixType.attlen);
+ prst->nulls[5] = false;
+ }
+ else
+ prst->nulls[5] = true;
+ if (!IndexTupleHasNulls(node))
+ {
+ prst->dvalues[6] = datumCopy(SGNTDATUM(node, &prst->state),
+ prst->state.attLabelType.attbyval,
+ prst->state.attLabelType.attlen);
+ prst->nulls[6] = false;
+ }
+ else
+ prst->nulls[6] = true;
+ prst->nulls[7] = true;
+
+ pushSPGistPrint(funcctx, prst, &node->t_tid, s->level + 1);
+ s->nlabel = i + 1;
+ oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
+ prst->stack = lcons(s, prst->stack);
+ MemoryContextSwitchTo(oldcontext);
+ s = NULL;
+ }
+
+ UnlockReleaseBuffer(buffer);
+ if (s)
+ pfree(s);
+ } while (0);
+
+ htuple = heap_form_tuple(funcctx->attinmeta->tupdesc,
+ prst->dvalues,
+ prst->nulls);
+ result = TupleGetDatum(funcctx->slot, htuple);
+
+ SRF_RETURN_NEXT(funcctx, result);
+}
diff --git a/contrib/pageinspect/sql/gin.sql b/contrib/pageinspect/sql/gin.sql
index d516ed3..45a136f 100644
--- a/contrib/pageinspect/sql/gin.sql
+++ b/contrib/pageinspect/sql/gin.sql
@@ -17,3 +17,15 @@ SELECT COUNT(*) > 0
FROM gin_leafpage_items(get_raw_page('test1_y_idx',
(pg_relation_size('test1_y_idx') /
current_setting('block_size')::bigint)::int - 1));
+
+\x
+
+CREATE TABLE test__int(a int[]);
+\copy test__int from 'data/test__int.data'
+
+CREATE INDEX gin_idx ON test__int USING gin ( a );
+
+INSERT INTO test__int ( SELECT ARRAY[t] || '{1000}'::_int4 FROM generate_series (1,300) as t );
+INSERT INTO test__int ( SELECT ARRAY[t] || '{1001}'::_int4 FROM generate_series (1,300) as t, generate_series(1,12) );
+VACUUM ANALYZE test__int;
+SELECT * FROM gin_value_count('gin_idx') as t(value int, nrow int);
diff --git a/contrib/pageinspect/sql/gist.sql b/contrib/pageinspect/sql/gist.sql
new file mode 100644
index 0000000..04e7daf
--- /dev/null
+++ b/contrib/pageinspect/sql/gist.sql
@@ -0,0 +1,6 @@
+CREATE TABLE gist_table (t box);
+\copy gist_table from 'data/rect.data'
+
+CREATE INDEX gist_idx ON gist_table USING gist (t);
+
+SELECT gist_stats('gist_idx');
diff --git a/contrib/pageinspect/sql/spgist.sql b/contrib/pageinspect/sql/spgist.sql
new file mode 100644
index 0000000..2bb6ac5
--- /dev/null
+++ b/contrib/pageinspect/sql/spgist.sql
@@ -0,0 +1,11 @@
+CREATE TABLE spgist_table (t box);
+\copy spgist_table from 'data/rect.data'
+
+SELECT center(t) AS p INTO spgist_table_p FROM spgist_table;
+
+CREATE INDEX spgist_idx ON spgist_table_p USING spgist (p);
+CREATE INDEX kdspgist_idx ON spgist_table_p USING spgist (p kd_point_ops);
+
+SELECT spgist_stats('spgist_idx');
+SELECT * FROM spgist_print('kdspgist_idx') as t(tid tid, allthesame bool, node_n int, level int, tid_pointer tid, prefix float8, node_label int, leaf_value point);
+SELECT * FROM spgist_print('spgist_idx') as t(tid tid, allthesame bool, node_n int, level int, tid_pointer tid, prefix point, node_label int, leaf_value point) WHERE level = 1;
diff --git a/doc/src/sgml/pageinspect.sgml b/doc/src/sgml/pageinspect.sgml
index ccdaf3e..b5d7d85 100644
--- a/doc/src/sgml/pageinspect.sgml
+++ b/doc/src/sgml/pageinspect.sgml
@@ -484,6 +484,119 @@ test=# SELECT * FROM brin_page_items(get_raw_page('brinidx', 5),
<variablelist>
<varlistentry>
<term>
+ <function>gin_value_count(gin_index text) returns setof record</function>
+ <indexterm>
+ <primary>gin_value_count</primary>
+ </indexterm>
+ </term>
+
+ <listitem>
+ <para>
+ <function>gin_value_count</function> prints estimated counts for each
+ indexed values, single-argument function will return result for a first
+ column of index. For example:
+<screen>
+test=# SELECT * FROM gin_value_count('gin_idx') as t(value int, nrow int) where nrow > 250;
+ value | nrow
+ -------+------
+ 31 | 254
+ 47 | 251
+ 52 | 257
+ 59 | 259
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <function>gin_value_count(gin_index text, colnumber int) returns setof record</function>
+ <indexterm>
+ <primary>gin_value_count</primary>
+ </indexterm>
+ </term>
+
+ <listitem>
+ <para>
+ <function>gin_value_count</function> prints estimated counts for each
+ indexed value for a given column. For example:
+<screen>
+test=# SELECT * FROM gin_value_count('gin_idx', 0) as t(value int, nrow int) where nrow > 250;
+ value | nrow
+ -------+------
+ 31 | 254
+ 47 | 251
+ 52 | 257
+ 59 | 259
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <function>gin_count_estimate(gin_index text, query tsquery) returns bigint</function>
+ <indexterm>
+ <primary>gin_count_estimate</primary>
+ </indexterm>
+ </term>
+
+ <listitem>
+ <para>
+ <function>gin_count_estimate</function> outputs number of indexed
+ rows matched query. It doesn't touch heap at all. For example:
+<screen>
+test=# select gin_count_estimate('qq', 'star');
+ gin_count_estimate
+--------------------
+ 790
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+
+
+ <varlistentry>
+ <term>
+ <function>gin_stats(gin_index text) returns text</function>
+ <indexterm>
+ <primary>gin_stats</primary>
+ </indexterm>
+ </term>
+
+ <listitem>
+ <para>
+ <function>gin_stats</function> Prints various statistics about index
+ internals. For example:
+<screen>
+test=# SELECT gin_stats('gin_idx');
+ gin_stats
+------------------------------
+ totalPages: 32 +
+ dataPages: 1 +
+ dataInnerPages: 0 +
+ dataLeafPages: 1 +
+ dataInnerFreeSpace: 0 +
+ dataLeafFreeSpace: 4454 +
+ dataInnerTuplesCount: 0 +
+ dataLeafIptrsCount: 3600 +
+ entryPages: 31 +
+ entryInnerPages: 21 +
+ entryLeafPages: 10 +
+ entryInnerFreeSpace: 15160+
+ entryLeafFreeSpace: 32788+
+ entryInnerTuplesCount: 7810 +
+ entryLeafTuplesCount: 305 +
+ entryPostingSize: 42122+
+ entryPostingCount: 96759+
+ entryAttrSize: 64924+
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
<function>gin_metapage_info(page bytea) returns record</function>
<indexterm>
<primary>gin_metapage_info</primary>
@@ -712,4 +825,281 @@ mapp | {65,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
</variablelist>
</sect2>
+ <sect2>
+ <title>GiST Functions</title>
+
+ <variablelist>
+ <varlistentry>
+ <term>
+ <function>gist_stats(indexname text) returns text</function>
+ <indexterm>
+ <primary>gist_stats</primary>
+ </indexterm>
+ </term>
+
+ <listitem>
+ <para>
+ <function>gist_stats</function> returns information about
+ a <acronym>GiST</acronym> index. For example:
+<screen>
+test=# SELECT gist_stats('gist_index');
+ gist_stats
+-----------------------------------------
+ Number of levels: 2 +
+ Number of pages: 29 +
+ Number of leaf pages: 28 +
+ Number of tuples: 3406 +
+ Number of invalid tuples: 0 +
+ Number of leaf tuples: 3378 +
+ Total size of tuples: 143516 bytes+
+ Total size of leaf tuples: 142296 bytes+
+ Total size of index: 237568 bytes+
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <function>gist_tree(indexname text, maxlevel int4) returns text</function>
+ <indexterm>
+ <primary>gist_tree</primary>
+ </indexterm>
+ </term>
+ <listitem>
+ <para>
+ <function>gist_tree</function> shows <acronym>GiST</acronym> tree up to
+ <parameter>maxlevel</parameter>. For example:
+<screen>
+test=# SELECT gist_tree('gist_index', 0);
+ 0(l:0) blk: 0 numTuple: 29 free: 6888b(15.63%)
+</screen>
+ Designation (from left to right):
+ <itemizedlist>
+ <listitem>
+ <para>0 - page number</para>
+ </listitem>
+ <listitem>
+ <para>(l:0) - tree level</para>
+ </listitem>
+ <listitem>
+ <para>blk: 0 - block number</para>
+ </listitem>
+ <listitem>
+ <para>numTuple: 29 - the number of tuples</para>
+ </listitem>
+ <listitem>
+ <para>free: 6888b - free space in bytes</para>
+ </listitem>
+ <listitem>
+ <para>(15.63%) - occupied space in percents</para>
+ </listitem>
+ </itemizedlist>
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <function>gist_tree(indexname text) returns text</function>
+ <indexterm>
+ <primary>gist_tree</primary>
+ </indexterm>
+ </term>
+ <listitem>
+ <para>
+ <function>gist_tree</function> shows full <acronym>GiST</acronym> tree.
+ For example:
+<screen>
+test=# SELECT gist_tree('gist_index');
+ 0(l:0) blk: 0 numTuple: 29 free: 6888b(15.63%)
+ 1(l:1) blk: 13 numTuple: 180 free: 244b(97.01%)
+ 2(l:1) blk: 11 numTuple: 175 free: 464b(94.32%)
+ 3(l:1) blk: 2 numTuple: 101 free: 3720b(54.43%)
+ 4(l:1) blk: 17 numTuple: 111 free: 3280b(59.82%)
+ 5(l:1) blk: 18 numTuple: 101 free: 3720b(54.43%)
+ 6(l:1) blk: 10 numTuple: 98 free: 3852b(52.82%)
+ 7(l:1) blk: 19 numTuple: 111 free: 3280b(59.82%)
+ 8(l:1) blk: 9 numTuple: 97 free: 3896b(52.28%)
+ 9(l:1) blk: 20 numTuple: 104 free: 3588b(56.05%)
+ 10(l:1) blk: 14 numTuple: 96 free: 3940b(51.74%)
+ 11(l:1) blk: 21 numTuple: 106 free: 3500b(57.13%)
+ 12(l:1) blk: 7 numTuple: 103 free: 3632b(55.51%)
+ 13(l:1) blk: 1 numTuple: 101 free: 3720b(54.43%)
+ 14(l:1) blk: 16 numTuple: 97 free: 3896b(52.28%)
+ 15(l:1) blk: 24 numTuple: 103 free: 3632b(55.51%)
+ 16(l:1) blk: 4 numTuple: 98 free: 3852b(52.82%)
+ 17(l:1) blk: 25 numTuple: 98 free: 3852b(52.82%)
+ 18(l:1) blk: 3 numTuple: 97 free: 3896b(52.28%)
+ 19(l:1) blk: 26 numTuple: 96 free: 3940b(51.74%)
+ 20(l:1) blk: 6 numTuple: 103 free: 3632b(55.51%)
+ 21(l:1) blk: 8 numTuple: 162 free: 1036b(87.31%)
+ 22(l:1) blk: 23 numTuple: 94 free: 4028b(50.66%)
+ 23(l:1) blk: 12 numTuple: 82 free: 4556b(44.19%)
+ 24(l:1) blk: 27 numTuple: 105 free: 3544b(56.59%)
+ 25(l:1) blk: 5 numTuple: 90 free: 4204b(48.51%)
+ 26(l:1) blk: 28 numTuple: 100 free: 3764b(53.90%)
+ 27(l:1) blk: 22 numTuple: 101 free: 3720b(54.43%)
+ 28(l:1) blk: 15 numTuple: 95 free: 3984b(51.20%)
+ 29(l:1) blk: 29 numTuple: 95 free: 3984b(51.20%)
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <function>gist_print(indexname text) returns setof record</function>
+ <indexterm>
+ <primary>gist_print</primary>
+ </indexterm>
+ </term>
+ <listitem>
+ <para>
+ <function>gist_print</function> prints objects stored in
+ <acronym>GiST</acronym> tree, works only if objects in index have
+ textual representation (<function>type_out</function> functions should be
+ implemented for the given object type). It's known to work with R-tree
+ <acronym>GiST</acronym> based index. Note, in example below, objects are
+ of type box. For example:
+<screen>
+test=# SELECT * FROM gist_print('gist_index') AS t(level int, valid bool, a box) WHERE level = 1;
+ level | valid | a
+-------+-------+-----------------------------
+ 1 | t | (37357,50073),(34242,357)
+ 1 | t | (43499,49770),(40358,43)
+ 1 | t | (31193,24679),(25047,12410)
+ 1 | t | (31018,12142),(25083,6)
+ 1 | t | (49944,25174),(43471,12802)
+ 1 | t | (12577,49757),(6302,37534)
+ 1 | t | (12528,37333),(6171,24861)
+ 1 | t | (50027,49751),(46817,25462)
+ 1 | t | (46870,49912),(43664,25722)
+ 1 | t | (24855,25574),(12447,19263)
+ 1 | t | (25054,19126),(12403,12796)
+ 1 | t | (32737,49923),(31178,1038)
+ 1 | t | (3184,24465),(15,81)
+ 1 | t | (24951,49983),(12740,44000)
+ 1 | t | (24919,43956),(12617,37901)
+ 1 | t | (40387,49852),(37338,25217)
+ 1 | t | (40325,24963),(37375,491)
+ 1 | t | (24919,12698),(12654,6518)
+ 1 | t | (25002,6338),(12350,51)
+ 1 | t | (49985,12554),(43447,222)
+ 1 | t | (25003,37769),(12552,25573)
+ 1 | t | (34270,49382),(32763,594)
+ 1 | t | (6205,50012),(3,37527)
+ 1 | t | (6163,37358),(120,25034)
+ 1 | t | (12343,24542),(9295,294)
+ 1 | t | (9308,24151),(6234,620)
+ 1 | t | (6230,24629),(3169,108)
+ 1 | t | (31179,50040),(28113,25556)
+ 1 | t | (28048,49694),(25000,25000)
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </sect2>
+
+ <sect2>
+ <title>SP-GiST Functions</title>
+
+ <variablelist>
+ <varlistentry>
+ <term>
+ <function>spgist_stats(indexname text) returns text</function>
+ <indexterm>
+ <primary>spgist_stats</primary>
+ </indexterm>
+ </term>
+
+ <listitem>
+ <para>
+ <function>spgist_stats</function> returns information about
+ a <acronym>SP-GiST</acronym> index. For example:
+<screen>
+test=# SELECT spgist_stats('spgist_idx');
+ spgist_stats
+----------------------------------
+ totalPages: 21 +
+ deletedPages: 0 +
+ innerPages: 3 +
+ leafPages: 18 +
+ emptyPages: 1 +
+ usedSpace: 121.27 kbytes+
+ freeSpace: 46.07 kbytes +
+ fillRatio: 72.47% +
+ leafTuples: 3669 +
+ innerTuples: 20 +
+ innerAllTheSame: 0 +
+ leafPlaceholders: 569 +
+ innerPlaceholders: 0 +
+ leafRedirects: 0 +
+ innerRedirects: 0 +
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <function>spgist_print(indexname text) returns setof record</function>
+ <indexterm>
+ <primary>spgist_print</primary>
+ </indexterm>
+ </term>
+
+ <listitem>
+ <para>
+ <function>spgist_print</function> prints objects stored in
+ <acronym>SP-GiST</acronym> tree, works only if objects in index have
+ textual representation (<function>type_out</function> functions should
+ be implemented for the given object type).
+ <itemizedlist>
+ <listitem>
+ <para>
+ Note 1. in example below we used quad_point_ops which uses point
+ for leaf and prefix value, but doesn't use node_label at all.
+ Use type 'int' as dummy type for prefix or/and node_label.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Note 2.
+<screen>
+ quad_point_ops: prefix point, node_label int, leaf_value point
+ kd_point_ops: prefix float, node_label int, leaf_value point
+ text_ops: prefix text, node_label char, leaf_value text
+</screen>
+ </para>
+ </listitem>
+ </itemizedlist>
+ For example:
+<screen>
+test=# SELECT * FROM spgist_print('spgist_idx') as t
+ (
+ tid tid,
+ allthesame bool,
+ node_n int,
+ level int,
+ tid_pointer tid,
+ prefix point,
+ node_label int,
+ leaf_value point
+ ) where level = 1;
+ tid | allthesame | node_n | level | tid_pointer | prefix | node_label | leaf_value
+-------+------------+--------+-------+-------------+-------------------------------------+------------+------------
+ (1,1) | f | 0 | 1 | (5,4) | (24530.2070484581,23595.7092511013) | |
+ (1,1) | f | 1 | 1 | (5,3) | (24530.2070484581,23595.7092511013) | |
+ (1,1) | f | 2 | 1 | (5,2) | (24530.2070484581,23595.7092511013) | |
+ (1,1) | f | 3 | 1 | (5,1) | (24530.2070484581,23595.7092511013) | |
+
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </sect2>
+
</sect1>
--
2.7.4
Re: [PATCH] Pageinspect - add functions on GIN and GiST indexes from gevel
Hi, Alexey!
On Fri, Jul 21, 2017 at 3:05 PM, Alexey Chernyshov <
a.chernyshov@postgrespro.ru> wrote:
the following patch transfers functionality from gevel module
(http://www.sai.msu.su/~megera/wiki/Gevel) which provides functions for
analyzing GIN and GiST indexes to pageinspect. Gevel was originally
designed by Oleg Bartunov, and Teodor Sigaev for developers of GiST and
GIN indexes.
It's very good that you've picked up this work! pageinspect is lacking of
this functionality.
Functions added:
- gist_stat(text) - shows statistics on GiST Tree
- gist_tree(text) - shows GiST tree
- gist_tree(text, int4) - shows GiST tree up to MAXLEVEL
- gist_print(text) - prints objects stored in GiST tree
- spgist_stat(text) - shows statistics on SP-GiST
- spgist_print(text) - prints objects stored in index
- gin_value_count() - originally gin_stat(text) - prints estimated counts
for index values
- gin_stats() - originally gin_statpage(text) - shows statistics
- gin_count_estimate(text, tsquery) - shows number of indexed rows matched
queryTests also transferred, docs for new functions are added. I run pgindent
over the code, but the result is different from those I expected, so I
leave
pgindented one.
The patch is applicable to the commit 866f4a7c210857aa342bf901558d17
0325094dde.
As we can see, gevel contains functions which analyze the whole index.
pageinspect is written in another manner: it gives you functionality to
analyze individual pages, tuples and so on.
Thus, we probably shouldn't try to move gevel functions to pageinspect "as
is". They should be rewritten in more granular manner as well as other
pageinspact functions are. Any other opinions?
------
Alexander Korotkov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
Re: [PATCH] Pageinspect - add functions on GIN and GiST indexes from gevel
On Fri, Jul 21, 2017 at 8:05 AM, Alexey Chernyshov
<a.chernyshov@postgrespro.ru> wrote:
the following patch transfers functionality from gevel module
(http://www.sai.msu.su/~megera/wiki/Gevel) which provides functions for
analyzing GIN and GiST indexes to pageinspect. Gevel was originally
designed by Oleg Bartunov, and Teodor Sigaev for developers of GiST and
GIN indexes.
It's not clear from the web site in question that the relevant code is
released under the PostgreSQL license.
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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Re: [PATCH] Pageinspect - add functions on GIN and GiST indexes from gevel
On Mon, Jul 24, 2017 at 11:38 PM, Robert Haas <robertmhaas@gmail.com> wrote:
On Fri, Jul 21, 2017 at 8:05 AM, Alexey Chernyshov
<a.chernyshov@postgrespro.ru> wrote:the following patch transfers functionality from gevel module
(http://www.sai.msu.su/~megera/wiki/Gevel) which provides functions for
analyzing GIN and GiST indexes to pageinspect. Gevel was originally
designed by Oleg Bartunov, and Teodor Sigaev for developers of GiST and
GIN indexes.It's not clear from the web site in question that the relevant code is
released under the PostgreSQL license.
git clone git://sigaev.ru/gevel
from README.gevel
License
Stable version, included into PostgreSQL distribution, released under
BSD license. Development version, available from this site, released under
the GNU General Public License, version 2 (June 1991)
We would be happy to write anything community likes :)
--
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Re: [PATCH] Pageinspect - add functions on GIN and GiST indexes from gevel
It's not clear from the web site in question that the relevant code is
released under the PostgreSQL license.
As author I allow to use this code in PostgreSQL and under its license.
--
Teodor Sigaev E-mail: teodor@sigaev.ru
WWW: http://www.sigaev.ru/
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Re: [PATCH] Pageinspect - add functions on GIN and GiST indexes from gevel
On Tue, Jul 25, 2017 at 5:57 AM, Teodor Sigaev <teodor@sigaev.ru> wrote:
It's not clear from the web site in question that the relevant code is
released under the PostgreSQL license.As author I allow to use this code in PostgreSQL and under its license.
Great. As long as all authors feel that way, we're fine.
--
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EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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Re: [PATCH] Pageinspect - add functions on GIN and GiST indexes from gevel
On Sat, Jul 22, 2017 at 12:05 AM, Alexey Chernyshov
<a.chernyshov@postgrespro.ru> wrote:
the following patch transfers functionality from gevel module
(http://www.sai.msu.su/~megera/wiki/Gevel) which provides functions for
analyzing GIN and GiST indexes to pageinspect. Gevel was originally
designed by Oleg Bartunov, and Teodor Sigaev for developers of GiST and
GIN indexes.Functions added:
- gist_stat(text) - shows statistics on GiST Tree
- gist_tree(text) - shows GiST tree
- gist_tree(text, int4) - shows GiST tree up to MAXLEVEL
- gist_print(text) - prints objects stored in GiST tree
- spgist_stat(text) - shows statistics on SP-GiST
- spgist_print(text) - prints objects stored in index
- gin_value_count() - originally gin_stat(text) - prints estimated counts
for index values
- gin_stats() - originally gin_statpage(text) - shows statistics
- gin_count_estimate(text, tsquery) - shows number of indexed rows matched
queryTests also transferred, docs for new functions are added. I run pgindent
over the code, but the result is different from those I expected, so I leave
pgindented one.
The patch is applicable to the commit
866f4a7c210857aa342bf901558d170325094dde.
Hi Alexey,
This patch still applies but doesn't build after commits 2cd70845 and c6293249.
ginfuncs.c:91:47: error: invalid type argument of ‘->’ (have
‘FormData_pg_attribute’)
st->index->rd_att->attrs[st->attnum]->attbyval,
...several similar errors...
For example, that expression needs to be changed to:
TupleDescAttr(st->index->rd_att, attnum)->attbyval
Here is some superficial review since I'm here:
+/*
+ * process_tuples
+ * Retrieves the number of TIDs in a tuple.
+ */
+static void
+process_tuple(FuncCallContext *funcctx, GinStatState * st, IndexTuple itup)"process_tuples" vs "process_tuple"
+ /* do no distiguish various null category */
"do not distinguish various null categories"
+ st->nulls[0] = (st->category == GIN_CAT_NORM_KEY) ? false : true;
That's a long way to write (st->category != GIN_CAT_NORM_KEY)!
+ * We scaned the whole page, so we should take right page
"scanned"
+/*
+ * refind_position
+ * Refinds a previois position, at returns it has correctly
+ * set offset and buffer is locked.
+ */"previous", s/, at returns/. On return/
+ memset(st->nulls, false, 2 * sizeof(*st->nulls));
"false" looks strange here where an int is expected. The size
expression is weird. I think you should just write:
st->nulls[0] = false;
st->nulls[1] = false;
Investigating the types more closely, I see that 'nulls' is declared
like this (in struct GinStatState):
+ char nulls[2];
Then later you do this:
+ htuple = heap_form_tuple(funcctx->attinmeta->tupdesc,
+ st->dvalues,
+ st->nulls);But that's not OK, heap_form_tuple takes bool *. bool and char are
not interchangeable (they may have different sizes on some platforms,
among other problems, even though usually they are both 1 byte). So I
think you should declare it as "bool nulls[2]".
Meanwhile in TypeStorage you have a member "bool *nulls", which you
then initialise like so:
+ st->nulls = (char *) palloc((tupdesc->natts + 2) * sizeof(*st->nulls));
That cast is wrong.
+/*
+ * gin_count_estimate
+ * Outputs number of indexed rows matched query. It doesn't touch heap at
+ * all.Maybe "... number of indexed rows matching query."?
+ if (attnum < 0 || attnum >= st->index->rd_att->natts)
+ elog(ERROR, "Wrong column's number");
+ st->attnum = attnum;Maybe "invalid column number" or "invalid attribute number"?
+ elog(ERROR, "Column type is not a tsvector");
s/C/c/ (according to convention).
+ * Prints various stat about index internals.
s/stat/stats/
+ elog(ERROR, "Relation %s.%s is not an index",
s/R/r/
+ elog(ERROR, "Index %s.%s has wrong type",
s/I/i/
+ <function>gin_value_count</function> prints estimated counts for each
+ indexed values, single-argument function will return result for a first
+ column of index. For example:"... for each indexed value. The single argument version will return
results for the first column of an index. For example:"
+ <function>gin_count_estimate</function> outputs number of indexed
+ rows matched query. It doesn't touch heap at all. For example:"... outputs the number of indexed rows matched by a query. ..."
+ <function>gist_print</function> prints objects stored in
+ <acronym>GiST</acronym> tree, works only if objects in index have
+ textual representation (<function>type_out</function> functions should be
+ implemented for the given object type). It's known to work with R-tree
+ <acronym>GiST</acronym> based index. Note, in example below, objects are
+ of type box. For example:"... prints objects stored in a GiST tree. it works only if the
objects in the index have textual representation (type_out functions
should be implemented for the given object type). It's known to work
with R-tree GiST-based indexes. Note: in the example below, objects
are of type box. For example:"
+ <function>gin_value_count</function> prints estimated counts for each
+ indexed value for a given column. For example:Maybe "for a given column (starting from zero)"?
+ <function>spgist_print</function> prints objects stored in
+ <acronym>SP-GiST</acronym> tree, works only if objects in index have
+ textual representation (<function>type_out</function> functions should
+ be implemented for the given object type)."... tree. It works only if ..."
+ Note 1. in example below we used quad_point_ops which uses point
+ for leaf and prefix value, but doesn't use node_label at all.
+ Use type 'int' as dummy type for prefix or/and node_label."... in the example ..."
A few random whitespace changes:
- (errmsg("must be superuser to use raw page functions"))));
+ (errmsg("must be superuser to use raw page functions")))
+ );- opaq->flags, GIN_META)));
+ opaq->flags, GIN_META))
+ );- flags[nflags++] = DirectFunctionCall1(to_hex32, Int32GetDatum(flagbits));
+ flags[nflags++] = DirectFunctionCall1(to_hex32,
+ Int32GetDatum(flagbits));- (GIN_DATA | GIN_LEAF | GIN_COMPRESSED))));
+ (GIN_DATA | GIN_LEAF | GIN_COMPRESSED)))
+ );--
Thomas Munro
http://www.enterprisedb.com
--
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Re: [PATCH] Pageinspect - add functions on GIN and GiST indexes from gevel
On Wed, 6 Sep 2017 22:56:45 +1200
Thomas Munro <thomas.munro@enterprisedb.com> wrote:
Hi Thomas,
Thanks a lot for your careful review.
This patch still applies but doesn't build after commits 2cd70845 and
c6293249.
Updated patch is attached.
Here is some superficial review since I'm here:
Thank you very much, I hope I corrected the most part of mistakes.
--
Alexey Chernyshov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
Attachments:
0001-gevel_to_pageinspect-v2.patchtext/x-patchDownload
diff --git a/contrib/pageinspect/Makefile b/contrib/pageinspect/Makefile
index 0a3cbee..f468d14 100644
--- a/contrib/pageinspect/Makefile
+++ b/contrib/pageinspect/Makefile
@@ -1,17 +1,18 @@
# contrib/pageinspect/Makefile
MODULE_big = pageinspect
-OBJS = rawpage.o heapfuncs.o btreefuncs.o fsmfuncs.o \
- brinfuncs.o ginfuncs.o hashfuncs.o $(WIN32RES)
+OBJS = rawpage.o heapfuncs.o btreefuncs.o fsmfuncs.o brinfuncs.o \
+ ginfuncs.o hashfuncs.o gistfuncs.o spgistfuncs.o $(WIN32RES)
EXTENSION = pageinspect
-DATA = pageinspect--1.5.sql pageinspect--1.5--1.6.sql \
- pageinspect--1.4--1.5.sql pageinspect--1.3--1.4.sql \
- pageinspect--1.2--1.3.sql pageinspect--1.1--1.2.sql \
- pageinspect--1.0--1.1.sql pageinspect--unpackaged--1.0.sql
+DATA = pageinspect--1.5.sql pageinspect--1.6--1.7.sql \
+ pageinspect--1.5--1.6.sql pageinspect--1.4--1.5.sql \
+ pageinspect--1.3--1.4.sql pageinspect--1.2--1.3.sql \
+ pageinspect--1.1--1.2.sql pageinspect--1.0--1.1.sql \
+ pageinspect--unpackaged--1.0.sql
PGFILEDESC = "pageinspect - functions to inspect contents of database pages"
-REGRESS = page btree brin gin hash
+REGRESS = page btree brin gin hash gist spgist
ifdef USE_PGXS
PG_CONFIG = pg_config
diff --git a/contrib/pageinspect/brinfuncs.c b/contrib/pageinspect/brinfuncs.c
index 13da761..5eb4b25 100644
--- a/contrib/pageinspect/brinfuncs.c
+++ b/contrib/pageinspect/brinfuncs.c
@@ -11,21 +11,21 @@
#include "pageinspect.h"
-#include "access/htup_details.h"
#include "access/brin.h"
#include "access/brin_internal.h"
#include "access/brin_page.h"
#include "access/brin_revmap.h"
#include "access/brin_tuple.h"
+#include "access/htup_details.h"
#include "catalog/index.h"
#include "catalog/pg_type.h"
#include "funcapi.h"
#include "lib/stringinfo.h"
+#include "miscadmin.h"
#include "utils/array.h"
#include "utils/builtins.h"
#include "utils/lsyscache.h"
#include "utils/rel.h"
-#include "miscadmin.h"
PG_FUNCTION_INFO_V1(brin_page_type);
diff --git a/contrib/pageinspect/data/rect.data b/contrib/pageinspect/data/rect.data
new file mode 100644
index 0000000..e32b6fe
--- /dev/null
+++ b/contrib/pageinspect/data/rect.data
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diff --git a/contrib/pageinspect/data/test__int.data b/contrib/pageinspect/data/test__int.data
new file mode 100644
index 0000000..b3903d0
--- /dev/null
+++ b/contrib/pageinspect/data/test__int.data
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+{20,41,87,123,124,299}
+{62,120,169}
+{37,43,92,175,206,222}
+{95,168,180,250,269,296}
+{60,228,278,285}
+{173,195,232,276}
+{1,2,139,256,278}
+{51,119}
+{212,238,291}
+{120,172,292}
+{138,279}
+{251,261}
+{151,181,278,296}
+{163,207,220,289,295}
+{89,278,290}
+{24,137,157,206,271,278}
+{7,63,83,89,155,189}
+{2,5,172,195,215,260}
+{243,281}
+{60,125}
+{74,87,222,236}
+{45,70,159,194}
+{69,159,250}
+{150,214,296}
+{101,158,250}
+{56,134}
+{57,87,160,167,247,285}
+{123,269}
+{235,242}
+{79,95,115,167,287}
+{31,56,132,244,276}
+{25,218,241,241}
+{57,82,151,170,204}
+{69,103,288}
+{88,138,154,292}
+{14,98,138,227,245,249}
+{175,222,274}
+{38,139,193,208,277}
+{79,141}
+{5,77,197,209}
+{15,37,77,110,116}
+{26,226}
+{68,93,101,140,233}
+{53,96,170,192,290}
+{29,89,102,216,220}
+{11,85,136,239}
+{158,180,195,200,226}
+{10,49,118,137,172}
+{144,172,183}
+{14,176,188,215,272}
+{42,97,125}
+{114,166}
+{52,61,162,171,249}
+{140,195,242}
+{59,99,233}
+{31,76,136,181,187}
+{81,112,157,168,271,294}
+{8,35,44,48,190,297}
+{145,195,201}
+{160,248,291}
+{94,270,285}
+{116,139,225}
+{111,131,140}
+{158,277}
+{59,229,257}
+{25,47,99,123,239}
+{8,36,205,274,295}
+{132,152,178,192,235}
+{19,40,96,204}
+{7,77}
+{211,282}
+{26,100,180,244,281,296}
+{200,212,286}
+{5,94,151,290}
+{75,80,128,179,269,269}
+{7,111}
+{7,26,69,158,269,276}
+{7,36,74,94,171,215}
+{2,62,65,93,124,271}
+{78,96,109,189}
+{182,197,280,298}
+{17,78,82,85,85,208}
+{6,122,155}
+{14,33,130}
+{1,21,167,169}
+{49,85,158,175,213}
+{59,194}
+{125,132,259,285}
+{20,38,81,89,234,274}
+{106,140,156,287}
+{57,125}
+{53,103,158,204,234,267}
+{0,49,160,189,235}
+{34,115,142,207}
+{162,173,181,190,298}
+{11,76,116,166,191}
+{2,87,99,236,279}
+{40,203}
+{2,33,39,215,254}
+{53,69,83,224,228}
+{79,136,183,216,226,227}
+{10,109,137,163,240}
+{24,126,141}
+{69,255}
+{103,138,230,246,259,283}
+{136,290}
+{13,34,78,145,166,242}
+{38,74,83,242,294}
+{54,248,273}
+{107,162}
+{50,170,176,191,207,275}
+{32,134,166,288,292}
+{163,167,186,274,291,296}
+{31,86,123,156,160}
+{114,133,136,176,281,290}
+{105,147,211}
+{124,151,179,222,299}
+{87,101}
+{145,169,181,205,247}
+{6,266}
+{26,33,52,56,106,116}
+{19,21,65,89,104,168}
+{164,181,208}
+{36,67,92,116,248}
+{145,200,247}
+{155,215}
+{49,212}
+{29,57,105,117,131}
+{2,13,68,128,139,140}
+{193,273,273}
+{3,78,105,111,297}
+{49,142,244}
+{32,259}
+{161,205}
+{96,146,179,259}
+{44,45,211,233}
+{56,91,146,166,285}
+{87,107,120,262,299}
+{76,160,276,297}
+{248,266}
+{5,12,188,240,247}
+{164,206,293}
+{15,18,60,163}
+{53,134,172,230,287,290}
+{117,137,146,153,155}
+{72,270}
+{171,251}
+{80,125,137,141,169}
+{52,108,200,219,225,271}
+{29,78,106,221}
+{21,74,110,273}
+{28,88,98,170}
+{83,104}
+{12,152}
+{7,69,143,246,265,269}
+{62,106,157,200}
+{113,260,272,272,294}
+{16,35,80,121,165,176}
+{96,154,172,198,263}
+{29,53,109,128,129,195}
+{131,230,271,273,295,299}
+{53,160,208,231}
+{23,180,208,249,272}
+{45,208,264}
+{14,29,169}
+{116,147,272}
+{7,193,237,271}
+{158,198,253}
+{41,60,71}
+{110,133,200,249}
+{24,159,255}
+{26,39,61,114,218,229}
+{141,286,299}
+{74,278}
+{67,71,155}
+{151,257,284}
+{13,28,72,131,206}
+{60,152,275,295}
+{88,105,184,185}
+{85,190,205,256,283,285}
+{202,285}
+{14,92,160,200,246,279}
+{42,95,157,195}
+{50,99,224,276}
+{32,97,101,122}
+{66,85}
+{19,146,180,242,269,286}
+{24,86,247,274}
+{54,264,270,284}
+{72,77,85,124,127,285}
+{47,249}
+{25,73,102,237}
+{33,68,84,117,120}
+{29,62,172,240,242,273}
+{42,140,182,248,261,282}
+{118,228,284}
+{1,89,158,294}
+{29,89,122,155,208,283}
+{173,208,229}
+{6,22,142,267,299}
+{22,122,173,245,293}
diff --git a/contrib/pageinspect/expected/gin.out b/contrib/pageinspect/expected/gin.out
index 82f63b2..c4d0ef1 100644
--- a/contrib/pageinspect/expected/gin.out
+++ b/contrib/pageinspect/expected/gin.out
@@ -35,3 +35,320 @@ FROM gin_leafpage_items(get_raw_page('test1_y_idx',
-[ RECORD 1 ]
?column? | t
+\x
+CREATE TABLE test__int(a int[]);
+\copy test__int from 'data/test__int.data'
+CREATE INDEX gin_idx ON test__int USING gin ( a );
+INSERT INTO test__int ( SELECT ARRAY[t] || '{1000}'::_int4 FROM generate_series (1,300) as t );
+INSERT INTO test__int ( SELECT ARRAY[t] || '{1001}'::_int4 FROM generate_series (1,300) as t, generate_series(1,12) );
+VACUUM ANALYZE test__int;
+SELECT * FROM gin_value_count('gin_idx') as t(value int, nrow int);
+ value | nrow
+-------+------
+ 0 | 38
+ 1 | 257
+ 2 | 244
+ 3 | 222
+ 4 | 228
+ 5 | 227
+ 6 | 243
+ 7 | 238
+ 8 | 236
+ 9 | 224
+ 10 | 236
+ 11 | 248
+ 12 | 224
+ 13 | 235
+ 14 | 237
+ 15 | 253
+ 16 | 234
+ 17 | 245
+ 18 | 246
+ 19 | 234
+ 20 | 236
+ 21 | 213
+ 22 | 235
+ 23 | 222
+ 24 | 197
+ 25 | 253
+ 26 | 218
+ 27 | 239
+ 28 | 198
+ 29 | 244
+ 30 | 247
+ 31 | 267
+ 32 | 234
+ 33 | 209
+ 34 | 231
+ 35 | 218
+ 36 | 242
+ 37 | 232
+ 38 | 221
+ 39 | 232
+ 40 | 241
+ 41 | 239
+ 42 | 221
+ 43 | 211
+ 44 | 231
+ 45 | 213
+ 46 | 236
+ 47 | 264
+ 48 | 221
+ 49 | 235
+ 50 | 219
+ 51 | 250
+ 52 | 270
+ 53 | 222
+ 54 | 242
+ 55 | 237
+ 56 | 237
+ 57 | 251
+ 58 | 231
+ 59 | 272
+ 60 | 219
+ 61 | 233
+ 62 | 235
+ 63 | 260
+ 64 | 252
+ 65 | 221
+ 66 | 228
+ 67 | 253
+ 68 | 196
+ 69 | 232
+ 70 | 232
+ 71 | 223
+ 72 | 247
+ 73 | 214
+ 74 | 232
+ 75 | 229
+ 76 | 233
+ 77 | 221
+ 78 | 227
+ 79 | 233
+ 80 | 216
+ 81 | 244
+ 82 | 223
+ 83 | 254
+ 84 | 227
+ 85 | 247
+ 86 | 255
+ 87 | 239
+ 88 | 258
+ 89 | 249
+ 90 | 244
+ 91 | 226
+ 92 | 225
+ 93 | 230
+ 94 | 218
+ 95 | 232
+ 96 | 239
+ 97 | 226
+ 98 | 209
+ 99 | 211
+ 100 | 216
+ 101 | 49
+ 102 | 47
+ 103 | 59
+ 104 | 55
+ 105 | 48
+ 106 | 49
+ 107 | 49
+ 108 | 51
+ 109 | 47
+ 110 | 51
+ 111 | 45
+ 112 | 46
+ 113 | 48
+ 114 | 38
+ 115 | 39
+ 116 | 43
+ 117 | 44
+ 118 | 46
+ 119 | 45
+ 120 | 52
+ 121 | 41
+ 122 | 64
+ 123 | 50
+ 124 | 41
+ 125 | 55
+ 126 | 41
+ 127 | 50
+ 128 | 54
+ 129 | 43
+ 130 | 44
+ 131 | 50
+ 132 | 57
+ 133 | 40
+ 134 | 41
+ 135 | 44
+ 136 | 58
+ 137 | 48
+ 138 | 44
+ 139 | 50
+ 140 | 49
+ 141 | 48
+ 142 | 43
+ 143 | 36
+ 144 | 43
+ 145 | 49
+ 146 | 46
+ 147 | 40
+ 148 | 52
+ 149 | 46
+ 150 | 49
+ 151 | 42
+ 152 | 58
+ 153 | 49
+ 154 | 51
+ 155 | 49
+ 156 | 45
+ 157 | 53
+ 158 | 59
+ 159 | 38
+ 160 | 53
+ 161 | 48
+ 162 | 41
+ 163 | 40
+ 164 | 52
+ 165 | 50
+ 166 | 40
+ 167 | 48
+ 168 | 45
+ 169 | 49
+ 170 | 50
+ 171 | 45
+ 172 | 46
+ 173 | 47
+ 174 | 41
+ 175 | 51
+ 176 | 50
+ 177 | 41
+ 178 | 42
+ 179 | 48
+ 180 | 47
+ 181 | 49
+ 182 | 40
+ 183 | 46
+ 184 | 52
+ 185 | 36
+ 186 | 45
+ 187 | 41
+ 188 | 47
+ 189 | 49
+ 190 | 46
+ 191 | 45
+ 192 | 39
+ 193 | 50
+ 194 | 39
+ 195 | 54
+ 196 | 43
+ 197 | 50
+ 198 | 46
+ 199 | 42
+ 200 | 31
+ 201 | 28
+ 202 | 28
+ 203 | 28
+ 204 | 30
+ 205 | 22
+ 206 | 25
+ 207 | 27
+ 208 | 32
+ 209 | 22
+ 210 | 21
+ 211 | 31
+ 212 | 22
+ 213 | 37
+ 214 | 19
+ 215 | 25
+ 216 | 27
+ 217 | 26
+ 218 | 24
+ 219 | 25
+ 220 | 26
+ 221 | 21
+ 222 | 23
+ 223 | 20
+ 224 | 26
+ 225 | 25
+ 226 | 25
+ 227 | 23
+ 228 | 30
+ 229 | 30
+ 230 | 24
+ 231 | 22
+ 232 | 27
+ 233 | 27
+ 234 | 21
+ 235 | 27
+ 236 | 24
+ 237 | 24
+ 238 | 29
+ 239 | 32
+ 240 | 31
+ 241 | 24
+ 242 | 36
+ 243 | 21
+ 244 | 29
+ 245 | 22
+ 246 | 23
+ 247 | 21
+ 248 | 26
+ 249 | 29
+ 250 | 24
+ 251 | 29
+ 252 | 25
+ 253 | 28
+ 254 | 25
+ 255 | 19
+ 256 | 23
+ 257 | 20
+ 258 | 24
+ 259 | 31
+ 260 | 29
+ 261 | 20
+ 262 | 25
+ 263 | 23
+ 264 | 25
+ 265 | 23
+ 266 | 31
+ 267 | 22
+ 268 | 26
+ 269 | 33
+ 270 | 25
+ 271 | 27
+ 272 | 29
+ 273 | 29
+ 274 | 26
+ 275 | 28
+ 276 | 30
+ 277 | 28
+ 278 | 29
+ 279 | 22
+ 280 | 29
+ 281 | 23
+ 282 | 30
+ 283 | 29
+ 284 | 23
+ 285 | 37
+ 286 | 27
+ 287 | 31
+ 288 | 28
+ 289 | 26
+ 290 | 25
+ 291 | 29
+ 292 | 22
+ 293 | 26
+ 294 | 29
+ 295 | 24
+ 296 | 27
+ 297 | 30
+ 298 | 29
+ 299 | 26
+ 300 | 13
+ 1000 | 300
+ 1001 | 3600
+ | 9
+ | 244
+(305 rows)
+
diff --git a/contrib/pageinspect/expected/gist.out b/contrib/pageinspect/expected/gist.out
new file mode 100644
index 0000000..46e55f4
--- /dev/null
+++ b/contrib/pageinspect/expected/gist.out
@@ -0,0 +1,18 @@
+CREATE TABLE gist_table (t box);
+\copy gist_table from 'data/rect.data'
+CREATE INDEX gist_idx ON gist_table USING gist (t);
+SELECT gist_stats('gist_idx');
+ gist_stats
+-----------------------------------------
+ Number of levels: 2 +
+ Number of pages: 29 +
+ Number of leaf pages: 28 +
+ Number of tuples: 3406 +
+ Number of invalid tuples: 0 +
+ Number of leaf tuples: 3378 +
+ Total size of tuples: 143516 bytes+
+ Total size of leaf tuples: 142296 bytes+
+ Total size of index: 237568 bytes+
+
+(1 row)
+
diff --git a/contrib/pageinspect/expected/spgist.out b/contrib/pageinspect/expected/spgist.out
new file mode 100644
index 0000000..5bab22e
--- /dev/null
+++ b/contrib/pageinspect/expected/spgist.out
@@ -0,0 +1,120 @@
+CREATE TABLE spgist_table (t box);
+\copy spgist_table from 'data/rect.data'
+SELECT center(t) AS p INTO spgist_table_p FROM spgist_table;
+CREATE INDEX spgist_idx ON spgist_table_p USING spgist (p);
+CREATE INDEX kdspgist_idx ON spgist_table_p USING spgist (p kd_point_ops);
+SELECT spgist_stats('spgist_idx');
+ spgist_stats
+----------------------------------
+ totalPages: 21 +
+ deletedPages: 0 +
+ innerPages: 2 +
+ leafPages: 19 +
+ emptyPages: 0 +
+ usedSpace: 126.70 kbytes+
+ usedInnerSpace: 1.17 kbytes +
+ usedLeafSpace: 125.53 kbytes+
+ freeSpace: 40.64 kbytes +
+ fillRatio: 75.71% +
+ leafTuples: 3947 +
+ innerTuples: 20 +
+ innerAllTheSame: 0 +
+ leafPlaceholders: 569 +
+ innerPlaceholders: 0 +
+ leafRedirects: 0 +
+ innerRedirects: 0
+(1 row)
+
+SELECT * FROM spgist_print('kdspgist_idx') as t(tid tid, allthesame bool, node_n int, level int, tid_pointer tid, prefix float8, node_label int, leaf_value point);
+ tid | allthesame | node_n | level | tid_pointer | prefix | node_label | leaf_value
+----------+------------+--------+-------+-------------+---------+------------+-------------------
+ (1,1) | f | 0 | 1 | (5,1) | 23030 | |
+ (1,1) | f | 1 | 1 | (5,2) | 23030 | |
+ (5,2) | f | 0 | 2 | (5,6) | 21664 | |
+ (5,2) | f | 1 | 2 | (5,3) | 21664 | |
+ (5,3) | f | 0 | 3 | (5,5) | 37159.5 | |
+ (5,3) | f | 1 | 3 | (5,12) | 37159.5 | |
+ (5,12) | f | 0 | 4 | (5,13) | 36357.5 | |
+ (5,12) | f | 1 | 4 | (14,226) | 36357.5 | |
+ (14,226) | | | 5 | | | | (43240,47256.5)
+ (5,13) | f | 0 | 5 | (3,112) | 43507 | |
+ (5,13) | f | 1 | 5 | (5,25) | 43507 | |
+ (5,25) | f | 0 | 6 | (22,116) | 28862 | |
+ (5,25) | f | 1 | 6 | (22,115) | 28862 | |
+ (22,115) | | | 7 | | | | (30902,44532)
+ (22,116) | | | 7 | | | | (23048,47416)
+ (3,112) | | | 6 | | | | (35218.5,42124)
+ (5,5) | f | 0 | 4 | (5,11) | 33416 | |
+ (5,5) | f | 1 | 4 | (5,22) | 33416 | |
+ (5,22) | f | 0 | 5 | (20,225) | 30991 | |
+ (5,22) | f | 1 | 5 | (5,23) | 30991 | |
+ (5,23) | f | 0 | 6 | (9,112) | 41820 | |
+ (5,23) | f | 1 | 6 | (9,114) | 41820 | |
+ (9,114) | | | 7 | | | | (44732,32182)
+ (9,112) | | | 7 | | | | (35580,33526.5)
+ (20,225) | | | 6 | | | | (47724.5,27185.5)
+ (5,11) | f | 0 | 5 | (13,101) | 29986.5 | |
+ (5,11) | f | 1 | 5 | (13,100) | 29986.5 | |
+ (13,100) | | | 6 | | | | (24069,30850.5)
+ (13,101) | | | 6 | | | | (29539,25566)
+ (5,6) | f | 0 | 3 | (5,7) | 36774 | |
+ (5,6) | f | 1 | 3 | (5,19) | 36774 | |
+ (5,19) | f | 0 | 4 | (5,20) | 10075.5 | |
+ (5,19) | f | 1 | 4 | (18,225) | 10075.5 | |
+ (18,225) | | | 5 | | | | (20920.5,49105.5)
+ (5,20) | f | 0 | 5 | (10,110) | 44171.5 | |
+ (5,20) | f | 1 | 5 | (10,113) | 44171.5 | |
+ (10,113) | | | 6 | | | | (93,46797)
+ (10,110) | | | 6 | | | | (28.5,38640.5)
+ (5,7) | f | 0 | 4 | (7,113) | 9517 | |
+ (5,7) | f | 1 | 4 | (5,21) | 9517 | |
+ (5,21) | f | 0 | 5 | (19,115) | 28907.5 | |
+ (5,21) | f | 1 | 5 | (19,112) | 28907.5 | |
+ (19,112) | | | 6 | | | | (11916.5,31668)
+ (19,115) | | | 6 | | | | (20622.5,27462.5)
+ (7,113) | | | 5 | | | | (9296,35157)
+ (5,1) | f | 0 | 2 | (5,8) | 26938 | |
+ (5,1) | f | 1 | 2 | (5,4) | 26938 | |
+ (5,4) | f | 0 | 3 | (5,10) | 9532 | |
+ (5,4) | f | 1 | 3 | (5,14) | 9532 | |
+ (5,14) | f | 0 | 4 | (5,15) | 38603 | |
+ (5,14) | f | 1 | 4 | (15,222) | 38603 | |
+ (15,222) | | | 5 | | | | (41926.5,17934.5)
+ (5,15) | f | 0 | 5 | (8,113) | 16345 | |
+ (5,15) | f | 1 | 5 | (8,112) | 16345 | |
+ (8,112) | | | 6 | | | | (32425,20702.5)
+ (8,113) | | | 6 | | | | (29134,15559.5)
+ (5,10) | f | 0 | 4 | (12,94) | 38800.5 | |
+ (5,10) | f | 1 | 4 | (5,24) | 38800.5 | |
+ (5,24) | f | 0 | 5 | (21,108) | 4752 | |
+ (5,24) | f | 1 | 5 | (21,107) | 4752 | |
+ (21,107) | | | 6 | | | | (49822.5,7097.5)
+ (21,108) | | | 6 | | | | (40315.5,1689.5)
+ (12,94) | | | 5 | | | | (30295.5,5090)
+ (5,8) | f | 0 | 3 | (5,17) | 11733.5 | |
+ (5,8) | f | 1 | 3 | (5,9) | 11733.5 | |
+ (5,9) | f | 0 | 4 | (6,114) | 11993 | |
+ (5,9) | f | 1 | 4 | (5,16) | 11993 | |
+ (5,16) | f | 0 | 5 | (16,123) | 17591 | |
+ (5,16) | f | 1 | 5 | (16,127) | 17591 | |
+ (16,127) | | | 6 | | | | (18352.5,19366)
+ (16,123) | | | 6 | | | | (24795,14921)
+ (6,114) | | | 5 | | | | (6706,16676)
+ (5,17) | f | 0 | 4 | (5,18) | 13329.5 | |
+ (5,17) | f | 1 | 4 | (17,226) | 13329.5 | |
+ (17,226) | | | 5 | | | | (23690,10214.5)
+ (5,18) | f | 0 | 5 | (11,113) | 6375 | |
+ (5,18) | f | 1 | 5 | (11,109) | 6375 | |
+ (11,109) | | | 6 | | | | (5501.5,9916)
+ (11,113) | | | 6 | | | | (1072.5,4752)
+(79 rows)
+
+SELECT * FROM spgist_print('spgist_idx') as t(tid tid, allthesame bool, node_n int, level int, tid_pointer tid, prefix point, node_label int, leaf_value point) WHERE level = 1;
+ tid | allthesame | node_n | level | tid_pointer | prefix | node_label | leaf_value
+-------+------------+--------+-------+-------------+-------------------------------------+------------+------------
+ (1,1) | f | 0 | 1 | (5,4) | (24530.2070484581,23595.7092511013) | |
+ (1,1) | f | 1 | 1 | (5,3) | (24530.2070484581,23595.7092511013) | |
+ (1,1) | f | 2 | 1 | (5,2) | (24530.2070484581,23595.7092511013) | |
+ (1,1) | f | 3 | 1 | (5,1) | (24530.2070484581,23595.7092511013) | |
+(4 rows)
+
diff --git a/contrib/pageinspect/ginfuncs.c b/contrib/pageinspect/ginfuncs.c
index f774495..401d4cf 100644
--- a/contrib/pageinspect/ginfuncs.c
+++ b/contrib/pageinspect/ginfuncs.c
@@ -2,11 +2,18 @@
* ginfuncs.c
* Functions to investigate the content of GIN indexes
*
+ * Source code is based on Gevel module available at
+ * (http://www.sai.msu.su/~megera/oddmuse/index.cgi/Gevel)
+ * Originally developed by:
+ * - Oleg Bartunov <oleg@sai.msu.su>, Moscow, Moscow University, Russia
+ * - Teodor Sigaev <teodor@sigaev.ru>, Moscow, Moscow University, Russia
+ *
* Copyright (c) 2014-2017, PostgreSQL Global Development Group
*
* IDENTIFICATION
* contrib/pageinspect/ginfuncs.c
*/
+
#include "postgres.h"
#include "pageinspect.h"
@@ -15,22 +22,263 @@
#include "access/gin_private.h"
#include "access/htup_details.h"
#include "catalog/namespace.h"
+#include "catalog/pg_am.h"
#include "catalog/pg_type.h"
#include "funcapi.h"
#include "miscadmin.h"
+#include "tsearch/ts_utils.h"
#include "utils/array.h"
#include "utils/builtins.h"
+#include "utils/datum.h"
+#include "utils/fmgroids.h"
#include "utils/rel.h"
+#include "utils/regproc.h"
+#include "utils/lsyscache.h"
+#include "utils/varlena.h"
+
#define DatumGetItemPointer(X) ((ItemPointer) DatumGetPointer(X))
#define ItemPointerGetDatum(X) PointerGetDatum(X)
+typedef struct GinStatState
+{
+ Relation index;
+ GinState ginstate;
+ OffsetNumber attnum;
+
+ Buffer buffer;
+ OffsetNumber offset;
+ Datum curval; /* Key */
+ GinNullCategory category;
+ Datum dvalues[2]; /* Represents tuple 0 - key; 1 - # of TIDs */
+ bool nulls[2];
+} GinStatState;
+
+typedef struct gin_leafpage_items_state
+{
+ TupleDesc tupd;
+ GinPostingList *seg;
+ GinPostingList *lastseg;
+} gin_leafpage_items_state;
+
PG_FUNCTION_INFO_V1(gin_metapage_info);
PG_FUNCTION_INFO_V1(gin_page_opaque_info);
PG_FUNCTION_INFO_V1(gin_leafpage_items);
+PG_FUNCTION_INFO_V1(gin_value_count);
+PG_FUNCTION_INFO_V1(gin_count_estimate);
+PG_FUNCTION_INFO_V1(gin_stats);
+/*
+ * process_tuple
+ * Retrieves the number of TIDs in a tuple.
+ */
+static void
+process_tuple(FuncCallContext *funcctx, GinStatState *st, IndexTuple itup)
+{
+ MemoryContext oldcontext;
+ Datum key;
+
+ oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
+
+ key = gintuple_get_key(&st->ginstate, itup, &st->category);
+
+ if (st->category != GIN_CAT_NORM_KEY)
+ st->curval = (Datum) 0;
+ else
+ st->curval = datumCopy(
+ key,
+ TupleDescAttr(st->index->rd_att, st->attnum)->attbyval,
+ TupleDescAttr(st->index->rd_att, st->attnum)->attlen);
+ MemoryContextSwitchTo(oldcontext);
+ st->dvalues[0] = st->curval;
+
+ /* do not distinguish various null categories */
+ st->nulls[0] = (st->category != GIN_CAT_NORM_KEY);
+
+ if (GinIsPostingTree(itup))
+ {
+ BlockNumber rootblkno = GinGetPostingTree(itup);
+ GinBtreeData btree;
+ GinBtreeStack *stack;
+ ItemPointerData minItem;
+ int nlist;
+ ItemPointer list;
+ Page page;
+ uint32 predictNumber;
+
+ LockBuffer(st->buffer, GIN_UNLOCK);
+ stack = ginScanBeginPostingTree(&btree, st->index, rootblkno, NULL);
+ page = BufferGetPage(stack->buffer);
+ ItemPointerSetMin(&minItem);
+ list = GinDataLeafPageGetItems(page, &nlist, minItem);
+ pfree(list);
+ predictNumber = stack->predictNumber;
+ st->dvalues[1] = Int32GetDatum(predictNumber * nlist);
+
+ LockBuffer(stack->buffer, GIN_UNLOCK);
+ freeGinBtreeStack(stack);
+ }
+ else
+ {
+ st->dvalues[1] = Int32GetDatum(GinGetNPosting(itup));
+ LockBuffer(st->buffer, GIN_UNLOCK);
+ }
+}
+
+static bool
+move_right_if_needed(GinStatState *st)
+{
+ Page page = BufferGetPage(st->buffer);
+
+ if (st->offset > PageGetMaxOffsetNumber(page))
+ {
+ /*
+ * We scanned the whole page, so we should take right page
+ */
+ BlockNumber blkno = GinPageGetOpaque(page)->rightlink;
+
+ if (GinPageRightMost(page))
+ return false; /* no more page */
+
+ LockBuffer(st->buffer, GIN_UNLOCK);
+ st->buffer = ReleaseAndReadBuffer(st->buffer, st->index, blkno);
+ LockBuffer(st->buffer, GIN_SHARE);
+ st->offset = FirstOffsetNumber;
+ }
+
+ return true;
+}
+
+/*
+ * refind_position
+ * Refinds a previous position, on return it has correctly
+ * set offset and buffer is locked.
+ */
+static bool
+refind_position(GinStatState *st)
+{
+ Page page;
+
+ /* find left if needed (it causes only for first search) */
+ for (;;)
+ {
+ IndexTuple itup;
+ BlockNumber blkno;
+
+ LockBuffer(st->buffer, GIN_SHARE);
+
+ page = BufferGetPage(st->buffer);
+ if (GinPageIsLeaf(page))
+ break;
+
+ itup = (IndexTuple) PageGetItem(page,
+ PageGetItemId(page, FirstOffsetNumber));
+ blkno = GinItemPointerGetBlockNumber(&(itup)->t_tid);
+
+ LockBuffer(st->buffer, GIN_UNLOCK);
+ st->buffer = ReleaseAndReadBuffer(st->buffer, st->index, blkno);
+ }
+
+ if (st->offset == InvalidOffsetNumber)
+ {
+ return (PageGetMaxOffsetNumber(page) >= FirstOffsetNumber);
+ }
+
+ for (;;)
+ {
+ int cmp;
+ GinNullCategory category;
+ Datum datum;
+ IndexTuple itup;
+
+ if (move_right_if_needed(st) == false)
+ return false;
+
+ itup = (IndexTuple) PageGetItem(page, PageGetItemId(page, st->offset));
+ datum = gintuple_get_key(&st->ginstate, itup, &category);
+ cmp = ginCompareAttEntries(&st->ginstate,
+ st->attnum + 1, st->curval, st->category,
+ gintuple_get_attrnum(&st->ginstate, itup),
+ datum, category);
+ if (cmp == 0)
+ {
+ if (st->curval && !TupleDescAttr(st->index->rd_att, st->attnum)->attbyval)
+ pfree((void *) st->curval);
+ return true;
+ }
+
+ st->offset++;
+ }
+
+ return false;
+}
+
+static Relation
+gin_index_open(RangeVar *relvar)
+{
+ Oid relOid = RangeVarGetRelid(relvar, NoLock, false);
+ Relation rel = index_open(relOid, AccessShareLock);
+
+ if (rel->rd_index == NULL)
+ elog(ERROR, "relation %s.%s is not an index",
+ get_namespace_name(RelationGetNamespace(rel)),
+ RelationGetRelationName(rel)
+ );
+
+ if (rel->rd_rel->relam != GIN_AM_OID)
+ elog(ERROR, "index %s.%s has wrong type",
+ get_namespace_name(RelationGetNamespace(rel)),
+ RelationGetRelationName(rel)
+ );
+ return rel;
+}
+
+static void
+gin_setup_firstcall(FuncCallContext *funcctx, text *name, int attnum)
+{
+ MemoryContext oldcontext;
+ GinStatState *st;
+ char *relname = text_to_cstring(name);
+ TupleDesc tupdesc;
+
+ oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
+
+ st = (GinStatState *) palloc(sizeof(GinStatState));
+ memset(st, 0, sizeof(GinStatState));
+ st->index = gin_index_open(makeRangeVarFromNameList(stringToQualifiedNameList(relname)));
+ initGinState(&st->ginstate, st->index);
+
+ if (attnum < 0 || attnum >= st->index->rd_att->natts)
+ elog(ERROR, "invalid attribute number");
+ st->attnum = attnum;
+
+ funcctx->user_fctx = (void *) st;
+
+ tupdesc = CreateTemplateTupleDesc(2, false);
+ TupleDescInitEntry(tupdesc, 1, "value",
+ TupleDescAttr(st->index->rd_att, st->attnum)->atttypid,
+ TupleDescAttr(st->index->rd_att, st->attnum)->atttypmod,
+ TupleDescAttr(st->index->rd_att, st->attnum)->attndims);
+ TupleDescInitEntry(tupdesc, 2, "nrow", INT4OID, -1, 0);
+
+ st->nulls[0] = false;
+ st->nulls[1] = false;
+
+ funcctx->slot = TupleDescGetSlot(tupdesc);
+ funcctx->attinmeta = TupleDescGetAttInMetadata(tupdesc);
+
+ MemoryContextSwitchTo(oldcontext);
+ pfree(relname);
+
+ st->offset = InvalidOffsetNumber;
+ st->buffer = ReadBuffer(st->index, GIN_ROOT_BLKNO);
+}
+
+/*
+ * gin_metapage_info
+ */
Datum
gin_metapage_info(PG_FUNCTION_ARGS)
{
@@ -86,7 +334,9 @@ gin_metapage_info(PG_FUNCTION_ARGS)
return HeapTupleGetDatum(resultTuple);
}
-
+/*
+ * gin_page_opaque_info
+ */
Datum
gin_page_opaque_info(PG_FUNCTION_ARGS)
{
@@ -110,7 +360,7 @@ gin_page_opaque_info(PG_FUNCTION_ARGS)
opaq = (GinPageOpaque) PageGetSpecialPointer(page);
- /* Build a tuple descriptor for our result type */
+ /* Build a tuple descriptor for the result type */
if (get_call_result_type(fcinfo, NULL, &tupdesc) != TYPEFUNC_COMPOSITE)
elog(ERROR, "return type must be a row type");
@@ -137,7 +387,8 @@ gin_page_opaque_info(PG_FUNCTION_ARGS)
if (flagbits)
{
/* any flags we don't recognize are printed in hex */
- flags[nflags++] = DirectFunctionCall1(to_hex32, Int32GetDatum(flagbits));
+ flags[nflags++] = DirectFunctionCall1(to_hex32,
+ Int32GetDatum(flagbits));
}
memset(nulls, 0, sizeof(nulls));
@@ -153,13 +404,9 @@ gin_page_opaque_info(PG_FUNCTION_ARGS)
return HeapTupleGetDatum(resultTuple);
}
-typedef struct gin_leafpage_items_state
-{
- TupleDesc tupd;
- GinPostingList *seg;
- GinPostingList *lastseg;
-} gin_leafpage_items_state;
-
+/*
+ * gin_leafpage_items
+ */
Datum
gin_leafpage_items(PG_FUNCTION_ARGS)
{
@@ -252,7 +499,7 @@ gin_leafpage_items(PG_FUNCTION_ARGS)
pfree(tids_datum);
pfree(tids);
- /* Build and return the result tuple. */
+ /* build and return the result tuple */
resultTuple = heap_form_tuple(inter_call_data->tupd, values, nulls);
result = HeapTupleGetDatum(resultTuple);
@@ -261,5 +508,311 @@ gin_leafpage_items(PG_FUNCTION_ARGS)
SRF_RETURN_NEXT(fctx, result);
}
else
+ {
SRF_RETURN_DONE(fctx);
+ }
+}
+
+/*
+ * gin_value_count
+ * Prints estimated counts for each indexed value.
+ */
+Datum
+gin_value_count(PG_FUNCTION_ARGS)
+{
+ FuncCallContext *funcctx;
+ GinStatState *st;
+ Datum result = (Datum) 0;
+ IndexTuple ituple;
+ HeapTuple htuple;
+ Page page;
+
+ if (SRF_IS_FIRSTCALL())
+ {
+ text *name = PG_GETARG_TEXT_P(0);
+
+ funcctx = SRF_FIRSTCALL_INIT();
+ gin_setup_firstcall(funcctx, name, (PG_NARGS() == 2) ?
+ PG_GETARG_INT32(1) : 0);
+ PG_FREE_IF_COPY(name, 0);
+ }
+
+ funcctx = SRF_PERCALL_SETUP();
+ st = (GinStatState *) (funcctx->user_fctx);
+
+ if (refind_position(st) == false)
+ {
+ UnlockReleaseBuffer(st->buffer);
+ index_close(st->index, AccessShareLock);
+
+ SRF_RETURN_DONE(funcctx);
+ }
+
+ for (;;)
+ {
+ st->offset++;
+
+ if (move_right_if_needed(st) == false)
+ {
+ UnlockReleaseBuffer(st->buffer);
+ index_close(st->index, AccessShareLock);
+
+ SRF_RETURN_DONE(funcctx);
+ }
+
+ page = BufferGetPage(st->buffer);
+ ituple = (IndexTuple) PageGetItem(page,
+ PageGetItemId(page, st->offset));
+
+ if (st->attnum + 1 == gintuple_get_attrnum(&st->ginstate, ituple))
+ break;
+ }
+
+ process_tuple(funcctx, st, ituple);
+
+ htuple = heap_form_tuple(funcctx->attinmeta->tupdesc,
+ st->dvalues,
+ st->nulls);
+ result = TupleGetDatum(funcctx->slot, htuple);
+
+ SRF_RETURN_NEXT(funcctx, result);
+}
+
+/*
+ * gin_count_estimate
+ * Outputs number of indexed rows matching query. It doesn't touch heap at
+ * all.
+ *
+ * Usage:
+ * SELECT gin_count_estimate('index_name', 'query');
+ */
+Datum
+gin_count_estimate(PG_FUNCTION_ARGS)
+{
+ text *name = PG_GETARG_TEXT_P(0);
+ Relation index;
+ IndexScanDesc scan;
+ int64 count = 0;
+ char *relname = text_to_cstring(name);
+ ScanKeyData key;
+ TIDBitmap *bitmap = tbm_create(work_mem * 1024L, NULL);
+
+ index = gin_index_open(makeRangeVarFromNameList(stringToQualifiedNameList(relname)));
+
+ if (index->rd_opcintype[0] != TSVECTOROID)
+ {
+ index_close(index, AccessShareLock);
+ elog(ERROR, "column type is not a tsvector");
+ }
+
+ key.sk_flags = 0;
+ key.sk_attno = 1;
+ key.sk_strategy = TSearchStrategyNumber;
+ key.sk_subtype = 0;
+ key.sk_argument = PG_GETARG_DATUM(1);
+
+ fmgr_info(F_TS_MATCH_VQ, &key.sk_func);
+
+ scan = index_beginscan_bitmap(index, SnapshotSelf, 1);
+ index_rescan(scan, &key, 1, NULL, 0);
+
+ count = index_getbitmap(scan, bitmap);
+ tbm_free(bitmap);
+
+ pfree(relname);
+
+ index_endscan(scan);
+ index_close(index, AccessShareLock);
+
+ PG_RETURN_INT64(count);
+}
+
+/*
+ * gin_stat
+ * Prints various stats about index internals.
+ *
+ * Usage:
+ * SELECT * FROM gin_stat('gin_idx') as t(value int, nrow int);
+ */
+Datum
+gin_stats(PG_FUNCTION_ARGS)
+{
+ text *name = PG_GETARG_TEXT_P(0);
+ RangeVar *relvar;
+ Relation index;
+ BlockNumber blkno;
+ char res[1024];
+ uint32 totalPages,
+ deletedPages = 0,
+ emptyDataPages = 0,
+ entryPages = 0,
+ dataPages = 0,
+ dataInnerPages = 0,
+ dataLeafPages = 0,
+ entryInnerPages = 0,
+ entryLeafPages = 0;
+
+ uint64 dataInnerFreeSpace = 0,
+ dataLeafFreeSpace = 0,
+ dataInnerTuplesCount = 0,
+ dataLeafIptrsCount = 0,
+ entryInnerFreeSpace = 0,
+ entryLeafFreeSpace = 0,
+ entryInnerTuplesCount = 0,
+ entryLeafTuplesCount = 0,
+ entryPostingSize = 0,
+ entryPostingCount = 0,
+ entryAttrSize = 0;
+
+ relvar = makeRangeVarFromNameList(textToQualifiedNameList(name));
+ index = relation_openrv(relvar, AccessExclusiveLock);
+
+ if (index->rd_rel->relkind != RELKIND_INDEX ||
+ index->rd_rel->relam != GIN_AM_OID)
+ elog(ERROR, "relation \"%s\" is not a GIN index",
+ RelationGetRelationName(index));
+
+ totalPages = RelationGetNumberOfBlocks(index);
+
+ for (blkno = GIN_ROOT_BLKNO; blkno < totalPages; blkno++)
+ {
+ Buffer buffer;
+ Page page;
+ PageHeader header;
+
+ buffer = ReadBuffer(index, blkno);
+ LockBuffer(buffer, BUFFER_LOCK_SHARE);
+
+ page = BufferGetPage(buffer);
+ header = (PageHeader) page;
+
+ if (GinPageIsDeleted(page))
+ {
+ deletedPages++;
+ }
+ else if (GinPageIsData(page))
+ {
+ dataPages++;
+ if (GinPageIsLeaf(page))
+ {
+ ItemPointerData minItem,
+ *ptr;
+ int nlist;
+
+
+ dataLeafPages++;
+ dataLeafFreeSpace += header->pd_upper - header->pd_lower;
+ ItemPointerSetMin(&minItem);
+
+ ptr = GinDataLeafPageGetItems(page, &nlist, minItem);
+
+ if (ptr)
+ {
+ pfree(ptr);
+ dataLeafIptrsCount += nlist;
+ }
+ else
+ emptyDataPages++;
+ }
+ else
+ {
+ dataInnerPages++;
+ dataInnerFreeSpace += header->pd_upper - header->pd_lower;
+ dataInnerTuplesCount += GinPageGetOpaque(page)->maxoff;
+ }
+ }
+ else
+ {
+ IndexTuple itup;
+ OffsetNumber i,
+ maxoff;
+
+ maxoff = PageGetMaxOffsetNumber(page);
+
+ entryPages++;
+ if (GinPageIsLeaf(page))
+ {
+ entryLeafPages++;
+ entryLeafFreeSpace += header->pd_upper - header->pd_lower;
+ entryLeafTuplesCount += maxoff;
+ }
+ else
+ {
+ entryInnerPages++;
+ entryInnerFreeSpace += header->pd_upper - header->pd_lower;
+ entryInnerTuplesCount += maxoff;
+ }
+
+ for (i = 1; i <= maxoff; i++)
+ {
+ itup = (IndexTuple) PageGetItem(page, PageGetItemId(page, i));
+
+ if (GinPageIsLeaf(page))
+ {
+ GinPostingList *list = (GinPostingList *) GinGetPosting(itup);
+
+ entryPostingCount += GinGetNPosting(itup);
+ entryPostingSize += SizeOfGinPostingList(list);
+ entryAttrSize += GinGetPostingOffset(itup) -
+ IndexInfoFindDataOffset((itup)->t_info);
+ }
+ else
+ {
+ entryAttrSize += IndexTupleSize(itup) -
+ IndexInfoFindDataOffset((itup)->t_info);
+ }
+ }
+ }
+
+ UnlockReleaseBuffer(buffer);
+ }
+
+ index_close(index, AccessExclusiveLock);
+ totalPages--;
+
+ snprintf(res, sizeof(res),
+ "totalPages: %u\n"
+ "deletedPages: %u\n"
+ "emptyDataPages: %u\n"
+ "dataPages: %u\n"
+ "dataInnerPages: %u\n"
+ "dataLeafPages: %u\n"
+ "dataInnerFreeSpace: " INT64_FORMAT "\n"
+ "dataLeafFreeSpace: " INT64_FORMAT "\n"
+ "dataInnerTuplesCount: " INT64_FORMAT "\n"
+ "dataLeafIptrsCount: " INT64_FORMAT "\n"
+ "entryPages: %u\n"
+ "entryInnerPages: %u\n"
+ "entryLeafPages: %u\n"
+ "entryInnerFreeSpace: " INT64_FORMAT "\n"
+ "entryLeafFreeSpace: " INT64_FORMAT "\n"
+ "entryInnerTuplesCount: " INT64_FORMAT "\n"
+ "entryLeafTuplesCount: " INT64_FORMAT "\n"
+ "entryPostingSize: " INT64_FORMAT "\n"
+ "entryPostingCount: " INT64_FORMAT "\n"
+ "entryAttrSize: " INT64_FORMAT "\n"
+ ,
+ totalPages,
+ deletedPages,
+ emptyDataPages,
+ dataPages,
+ dataInnerPages,
+ dataLeafPages,
+ dataInnerFreeSpace,
+ dataLeafFreeSpace,
+ dataInnerTuplesCount,
+ dataLeafIptrsCount,
+ entryPages,
+ entryInnerPages,
+ entryLeafPages,
+ entryInnerFreeSpace,
+ entryLeafFreeSpace,
+ entryInnerTuplesCount,
+ entryLeafTuplesCount,
+ entryPostingSize,
+ entryPostingCount,
+ entryAttrSize
+ );
+
+ PG_RETURN_TEXT_P(CStringGetTextDatum(res));
}
diff --git a/contrib/pageinspect/gistfuncs.c b/contrib/pageinspect/gistfuncs.c
new file mode 100644
index 0000000..4cb7af5
--- /dev/null
+++ b/contrib/pageinspect/gistfuncs.c
@@ -0,0 +1,509 @@
+/*
+ * gistfuncs.c
+ * Functions to investigate the content of GiST indexes
+ *
+ * Source code is based on Gevel module available at
+ * (http://www.sai.msu.su/~megera/oddmuse/index.cgi/Gevel)
+ * Originally developed by:
+ * - Oleg Bartunov <oleg@sai.msu.su>, Moscow, Moscow University, Russia
+ * - Teodor Sigaev <teodor@sigaev.ru>, Moscow, Moscow University, Russia
+ *
+ * Copyright (c) 2017, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ * contrib/pageinspect/gistfuncs.c
+ */
+
+#include "postgres.h"
+
+#include "access/gist_private.h"
+#include "access/relscan.h"
+#include "catalog/namespace.h"
+#include "catalog/pg_am.h"
+#include "catalog/pg_type.h"
+#include "funcapi.h"
+#include "utils/builtins.h"
+#include "utils/lsyscache.h"
+#include "utils/regproc.h"
+
+#define PAGESIZE (BLCKSZ - MAXALIGN(sizeof(PageHeaderData) + \
+ sizeof(ItemIdData)))
+
+/*
+ * For GiST tree dumping.
+ */
+typedef struct
+{
+ int maxlevel; /* Max level of tree to look through. */
+ text *txt;
+ char *ptr;
+ int len;
+} IdxInfo;
+
+/*
+ * For GiST tree traversal and statistics collection.
+ */
+typedef struct
+{
+ int level;
+ int numpages;
+ int numleafpages;
+ int numtuple;
+ int numinvalidtuple;
+ int numleaftuple;
+ uint64 tuplesize;
+ uint64 leaftuplesize;
+ uint64 totalsize;
+} IdxStat;
+
+/*
+ * GiST page.
+ */
+typedef struct GPItem
+{
+ Buffer buffer;
+ Page page;
+ OffsetNumber offset;
+ int level;
+ struct GPItem *next;
+} GPItem;
+
+typedef struct
+{
+ List *relname_list;
+ RangeVar *relvar;
+ Relation index;
+ Datum *dvalues;
+ bool *nulls;
+ GPItem *item;
+} TypeStorage;
+
+
+PG_FUNCTION_INFO_V1(gist_stats);
+PG_FUNCTION_INFO_V1(gist_tree);
+PG_FUNCTION_INFO_V1(gist_print);
+
+
+static Relation
+gist_index_open(RangeVar *relvar)
+{
+ Oid relOid = RangeVarGetRelid(relvar, NoLock, false);
+ Relation r = index_open(relOid, AccessExclusiveLock);
+
+ if (r->rd_index == NULL)
+ elog(ERROR, "relation %s.%s is not an index",
+ get_namespace_name(RelationGetNamespace(r)),
+ RelationGetRelationName(r)
+ );
+
+ if (r->rd_rel->relam != GIST_AM_OID)
+ elog(ERROR, "index %s.%s has wrong type",
+ get_namespace_name(RelationGetNamespace(r)),
+ RelationGetRelationName(r)
+ );
+
+ return r;
+}
+
+/* open_gp_page
+ * Opens GiST page.
+ */
+static GPItem *
+open_gp_page(FuncCallContext *funcctx, BlockNumber blk)
+{
+ GPItem *nitem;
+ MemoryContext oldcontext;
+ Relation index = ((TypeStorage *) (funcctx->user_fctx))->index;
+
+ oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
+ nitem = (GPItem *) palloc(sizeof(GPItem));
+ memset(nitem, 0, sizeof(GPItem));
+
+ nitem->buffer = ReadBuffer(index, blk);
+ nitem->page = (Page) BufferGetPage(nitem->buffer);
+ nitem->offset = FirstOffsetNumber;
+ nitem->next = ((TypeStorage *) (funcctx->user_fctx))->item;
+ nitem->level = (nitem->next) ? nitem->next->level + 1 : 1;
+ ((TypeStorage *) (funcctx->user_fctx))->item = nitem;
+
+ MemoryContextSwitchTo(oldcontext);
+ return nitem;
+}
+
+/*
+ * close_gp_page
+ * Close GiST page.
+ */
+static GPItem *
+close_gp_page(FuncCallContext *funcctx)
+{
+ GPItem *oitem = ((TypeStorage *) (funcctx->user_fctx))->item;
+
+ ((TypeStorage *) (funcctx->user_fctx))->item = oitem->next;
+
+ ReleaseBuffer(oitem->buffer);
+ pfree(oitem);
+ return ((TypeStorage *) (funcctx->user_fctx))->item;
+}
+
+/*
+ * gist_stattree
+ * Traverses GiST tree and collects statistics.
+ */
+static void
+gist_stattree(Relation r, int level, BlockNumber blk, OffsetNumber coff,
+ IdxStat * info)
+{
+ Buffer buffer;
+ Page page;
+ IndexTuple which;
+ ItemId iid;
+ OffsetNumber i,
+ maxoff;
+ BlockNumber cblk;
+ char *pred;
+
+ pred = (char *) palloc(sizeof(char) * level * 4 + 1);
+ MemSet(pred, ' ', level * 4);
+ pred[level * 4] = '\0';
+
+ buffer = ReadBuffer(r, blk);
+ page = (Page) BufferGetPage(buffer);
+
+ maxoff = PageGetMaxOffsetNumber(page);
+
+ info->numpages++;
+ info->tuplesize += PAGESIZE - PageGetFreeSpace(page);
+ info->totalsize += BLCKSZ;
+ info->numtuple += maxoff;
+ if (info->level < level)
+ info->level = level;
+
+ if (GistPageIsLeaf(page))
+ {
+ info->numleafpages++;
+ info->leaftuplesize += PAGESIZE - PageGetFreeSpace(page);
+ info->numleaftuple += maxoff;
+ }
+ else
+ {
+ for (i = FirstOffsetNumber; i <= maxoff; i = OffsetNumberNext(i))
+ {
+ iid = PageGetItemId(page, i);
+ which = (IndexTuple) PageGetItem(page, iid);
+ if (GistTupleIsInvalid(which))
+ info->numinvalidtuple++;
+ cblk = ItemPointerGetBlockNumber(&(which->t_tid));
+ gist_stattree(r, level + 1, cblk, i, info);
+ }
+ }
+
+ ReleaseBuffer(buffer);
+ pfree(pred);
+}
+
+/*
+ * gist_dumptree
+ * Recursively prints GiST tree.
+ */
+static void
+gist_dumptree(Relation r, int level, BlockNumber blk, OffsetNumber coff,
+ IdxInfo *info)
+{
+ Buffer buffer;
+ Page page;
+ IndexTuple which;
+ ItemId iid;
+ OffsetNumber i,
+ maxoff;
+ BlockNumber cblk;
+ char *pred;
+
+ pred = (char *) palloc(sizeof(char) * level * 4 + 1);
+ MemSet(pred, ' ', level * 4);
+ pred[level * 4] = '\0';
+
+ buffer = ReadBuffer(r, blk);
+ page = (Page) BufferGetPage(buffer);
+
+ maxoff = PageGetMaxOffsetNumber(page);
+
+
+ while ((info->ptr - ((char *) info->txt)) + level * 4 + 128 >= info->len)
+ {
+ int dist = info->ptr - ((char *) info->txt);
+
+ info->len *= 2;
+ info->txt = (text *) repalloc(info->txt, info->len);
+ info->ptr = ((char *) info->txt) + dist;
+ }
+
+ sprintf(info->ptr,
+ "%s%d(l:%d) blk: %u numTuple: %d free: %db(%.2f%%) rightlink:%u (%s)\n",
+ pred,
+ coff,
+ level,
+ blk,
+ (int) maxoff,
+ (int) PageGetFreeSpace(page),
+ 100.0 * (((float) PAGESIZE) - (float) PageGetFreeSpace(page)) /
+ ((float) PAGESIZE),
+ GistPageGetOpaque(page)->rightlink,
+ (GistPageGetOpaque(page)->rightlink == InvalidBlockNumber) ?
+ "InvalidBlockNumber" : "OK");
+ info->ptr = strchr(info->ptr, '\0');
+
+ if (!GistPageIsLeaf(page) && (info->maxlevel < 0 || level < info->maxlevel))
+ for (i = FirstOffsetNumber; i <= maxoff; i = OffsetNumberNext(i))
+ {
+ iid = PageGetItemId(page, i);
+ which = (IndexTuple) PageGetItem(page, iid);
+ cblk = ItemPointerGetBlockNumber(&(which->t_tid));
+ gist_dumptree(r, level + 1, cblk, i, info);
+ }
+ ReleaseBuffer(buffer);
+ pfree(pred);
+}
+
+/*
+ * setup_firstcall
+ * Initialization for first call of SRF.
+ */
+static void
+setup_firstcall(FuncCallContext *funcctx, text *name)
+{
+ MemoryContext oldcontext;
+ TypeStorage *st;
+ char *relname = text_to_cstring(name);
+ TupleDesc tupdesc;
+ char attname[NAMEDATALEN];
+ int i;
+
+ oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
+
+ st = (TypeStorage *) palloc(sizeof(TypeStorage));
+ memset(st, 0, sizeof(TypeStorage));
+ st->relname_list = stringToQualifiedNameList(relname);
+ st->relvar = makeRangeVarFromNameList(st->relname_list);
+ st->index = gist_index_open(st->relvar);
+ funcctx->user_fctx = (void *) st;
+
+ tupdesc = CreateTemplateTupleDesc(st->index->rd_att->natts + 2, false);
+ TupleDescInitEntry(tupdesc, 1, "level", INT4OID, -1, 0);
+ TupleDescInitEntry(tupdesc, 2, "valid", BOOLOID, -1, 0);
+ for (i = 0; i < st->index->rd_att->natts; i++)
+ {
+ sprintf(attname, "z%d", i + 2);
+ TupleDescInitEntry(
+ tupdesc,
+ i + 3,
+ attname,
+ TupleDescAttr(st->index->rd_att, i)->atttypid,
+ TupleDescAttr(st->index->rd_att, i)->atttypmod,
+ TupleDescAttr(st->index->rd_att, i)->attndims
+ );
+ }
+
+ st->dvalues = (Datum *) palloc((tupdesc->natts + 2) * sizeof(Datum));
+ st->nulls = (bool *) palloc((tupdesc->natts + 2) * sizeof(*st->nulls));
+
+ funcctx->slot = TupleDescGetSlot(tupdesc);
+ funcctx->attinmeta = TupleDescGetAttInMetadata(tupdesc);
+
+ MemoryContextSwitchTo(oldcontext);
+ pfree(relname);
+
+ st->item = open_gp_page(funcctx, GIST_ROOT_BLKNO);
+}
+
+/*
+ * close_call
+ * Clean up before SRF returns.
+ */
+static void
+close_call(FuncCallContext *funcctx)
+{
+ TypeStorage *st = (TypeStorage *) (funcctx->user_fctx);
+
+ while (st->item && close_gp_page(funcctx));
+
+ pfree(st->dvalues);
+ pfree(st->nulls);
+
+ index_close(st->index, AccessExclusiveLock);
+}
+
+/*
+ * gist_stats
+ * Returns statistics about GiST tree.
+ *
+ * Usage:
+ * select gist_stats('pix');
+ */
+Datum
+gist_stats(PG_FUNCTION_ARGS)
+{
+ text *name = PG_GETARG_TEXT_P(0);
+ char *relname = text_to_cstring(name);
+ RangeVar *relvar;
+ Relation index;
+ List *relname_list;
+ IdxStat info;
+ text *out = (text *) palloc(1024);
+ char *ptr = ((char *) out) + VARHDRSZ;
+
+
+ relname_list = stringToQualifiedNameList(relname);
+ relvar = makeRangeVarFromNameList(relname_list);
+ index = gist_index_open(relvar);
+ PG_FREE_IF_COPY(name, 0);
+
+ memset(&info, 0, sizeof(IdxStat));
+
+ gist_stattree(index, 0, GIST_ROOT_BLKNO, 0, &info);
+
+ index_close(index, AccessExclusiveLock);
+ pfree(relname);
+
+ sprintf(ptr,
+ "Number of levels: %d\n"
+ "Number of pages: %d\n"
+ "Number of leaf pages: %d\n"
+ "Number of tuples: %d\n"
+ "Number of invalid tuples: %d\n"
+ "Number of leaf tuples: %d\n"
+ "Total size of tuples: " INT64_FORMAT " bytes\n"
+ "Total size of leaf tuples: " INT64_FORMAT " bytes\n"
+ "Total size of index: " INT64_FORMAT " bytes\n",
+ info.level + 1,
+ info.numpages,
+ info.numleafpages,
+ info.numtuple,
+ info.numinvalidtuple,
+ info.numleaftuple,
+ info.tuplesize,
+ info.leaftuplesize,
+ info.totalsize);
+
+ ptr = strchr(ptr, '\0');
+
+ SET_VARSIZE(out, ptr - ((char *) out));
+ PG_RETURN_POINTER(out);
+}
+
+/*
+ * gist_tree
+ * Show GiST tree.
+ *
+ * Usage:
+ * SELECT gist_tree('gist_idx');
+ */
+Datum
+gist_tree(PG_FUNCTION_ARGS)
+{
+ text *name = PG_GETARG_TEXT_P(0);
+ char *relname = text_to_cstring(name);
+ RangeVar *relvar;
+ Relation index;
+ List *relname_list;
+ IdxInfo info;
+
+ relname_list = stringToQualifiedNameList(relname);
+ relvar = makeRangeVarFromNameList(relname_list);
+ index = gist_index_open(relvar);
+ PG_FREE_IF_COPY(name, 0);
+
+ info.maxlevel = (PG_NARGS() > 1) ? PG_GETARG_INT32(1) : -1;
+ info.len = 1024;
+ info.txt = (text *) palloc(info.len);
+ info.ptr = ((char *) info.txt) + VARHDRSZ;
+
+ gist_dumptree(index, 0, GIST_ROOT_BLKNO, 0, &info);
+
+ index_close(index, AccessExclusiveLock);
+ pfree(relname);
+
+ SET_VARSIZE(info.txt, info.ptr - ((char *) info.txt));
+ PG_RETURN_POINTER(info.txt);
+}
+
+/*
+ * gist_print
+ * Prints objects stored in GiST tree, works only if objects in index have
+ * textual representation (type_out functions should be implemented for
+ * given object type).
+ *
+ * Usage:
+ * SELECT * FROM gist_print('gist_idx') as t(level int, valid bool, a box);
+ */
+Datum
+gist_print(PG_FUNCTION_ARGS)
+{
+ FuncCallContext *funcctx;
+ TypeStorage *st;
+ Datum result = (Datum) 0;
+ ItemId iid;
+ IndexTuple ituple;
+ HeapTuple htuple;
+ int i;
+ bool isnull;
+
+ if (SRF_IS_FIRSTCALL())
+ {
+ text *name = PG_GETARG_TEXT_P(0);
+
+ funcctx = SRF_FIRSTCALL_INIT();
+ setup_firstcall(funcctx, name);
+ PG_FREE_IF_COPY(name, 0);
+ }
+
+ funcctx = SRF_PERCALL_SETUP();
+ st = (TypeStorage *) (funcctx->user_fctx);
+
+ if (!st->item)
+ {
+ close_call(funcctx);
+ SRF_RETURN_DONE(funcctx);
+ }
+
+ while (st->item->offset > PageGetMaxOffsetNumber(st->item->page))
+ {
+ if (!close_gp_page(funcctx))
+ {
+ close_call(funcctx);
+ SRF_RETURN_DONE(funcctx);
+ }
+ }
+
+ iid = PageGetItemId(st->item->page, st->item->offset);
+ ituple = (IndexTuple) PageGetItem(st->item->page, iid);
+
+ st->dvalues[0] = Int32GetDatum(st->item->level);
+ st->nulls[0] = false;
+ st->dvalues[1] = BoolGetDatum(GistPageIsLeaf(st->item->page) ||
+ !GistTupleIsInvalid(ituple));
+ st->nulls[1] = false;
+ for (i = 2; i < funcctx->attinmeta->tupdesc->natts; i++)
+ {
+ if (!GistPageIsLeaf(st->item->page) && GistTupleIsInvalid(ituple))
+ {
+ st->dvalues[i] = (Datum) 0;
+ st->nulls[i] = true;
+ }
+ else
+ {
+ st->dvalues[i] = index_getattr(ituple, i - 1, st->index->rd_att,
+ &isnull);
+ st->nulls[i] = isnull;
+ }
+ }
+
+ htuple = heap_form_tuple(funcctx->attinmeta->tupdesc, st->dvalues,
+ st->nulls);
+ result = TupleGetDatum(funcctx->slot, htuple);
+ st->item->offset = OffsetNumberNext(st->item->offset);
+ if (!GistPageIsLeaf(st->item->page))
+ open_gp_page(funcctx, ItemPointerGetBlockNumber(&(ituple->t_tid)));
+
+ SRF_RETURN_NEXT(funcctx, result);
+}
diff --git a/contrib/pageinspect/hashfuncs.c b/contrib/pageinspect/hashfuncs.c
index dbe3b6a..9597631 100644
--- a/contrib/pageinspect/hashfuncs.c
+++ b/contrib/pageinspect/hashfuncs.c
@@ -14,8 +14,8 @@
#include "access/hash.h"
#include "access/htup_details.h"
-#include "catalog/pg_type.h"
#include "catalog/pg_am.h"
+#include "catalog/pg_type.h"
#include "funcapi.h"
#include "miscadmin.h"
#include "utils/builtins.h"
diff --git a/contrib/pageinspect/pageinspect--1.6--1.7.sql b/contrib/pageinspect/pageinspect--1.6--1.7.sql
new file mode 100644
index 0000000..fc9d096
--- /dev/null
+++ b/contrib/pageinspect/pageinspect--1.6--1.7.sql
@@ -0,0 +1,57 @@
+/* contrib/pageinspect/pageinspect--1.6--1.7.sql */
+
+-- complain if script is sourced in psql, rather than via ALTER EXTENSION
+\echo Use "ALTER EXTENSION pageinspect UPDATE TO '1.7'" to load this file. \quit
+
+-- GiST
+CREATE FUNCTION gist_stats(text)
+RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+CREATE FUNCTION gist_tree(text)
+RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+CREATE FUNCTION gist_tree(text, int4)
+RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+CREATE FUNCTION gist_print(text)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+-- SP-GiST
+CREATE FUNCTION spgist_stats(text)
+RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+CREATE FUNCTION spgist_print(text)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+-- GIN
+CREATE FUNCTION gin_value_count(text)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+CREATE FUNCTION gin_value_count(text, int)
+RETURNS SETOF record
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+CREATE FUNCTION gin_stats(text)
+RETURNS text
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
+
+CREATE FUNCTION gin_count_estimate(text, tsquery)
+RETURNS bigint
+AS 'MODULE_PATHNAME'
+LANGUAGE C STRICT;
diff --git a/contrib/pageinspect/pageinspect.control b/contrib/pageinspect/pageinspect.control
index 1a61c9f..dcfc61f 100644
--- a/contrib/pageinspect/pageinspect.control
+++ b/contrib/pageinspect/pageinspect.control
@@ -1,5 +1,5 @@
# pageinspect extension
comment = 'inspect the contents of database pages at a low level'
-default_version = '1.6'
+default_version = '1.7'
module_pathname = '$libdir/pageinspect'
relocatable = true
diff --git a/contrib/pageinspect/spgistfuncs.c b/contrib/pageinspect/spgistfuncs.c
new file mode 100644
index 0000000..02ebde3
--- /dev/null
+++ b/contrib/pageinspect/spgistfuncs.c
@@ -0,0 +1,439 @@
+/*
+ * spgistfuncs.c
+ * Functions to investigate the content of SP-GiST indexes
+ *
+ * Source code is based on Gevel module available at
+ * (http://www.sai.msu.su/~megera/oddmuse/index.cgi/Gevel)
+ * Originally developed by:
+ * - Oleg Bartunov <oleg@sai.msu.su>, Moscow, Moscow University, Russia
+ * - Teodor Sigaev <teodor@sigaev.ru>, Moscow, Moscow University, Russia
+ *
+ * Copyright (c) 2017, PostgreSQL Global Development Group
+ *
+ * IDENTIFICATION
+ * contrib/pageinspect/spgistfuncs.c
+ */
+
+#include "postgres.h"
+
+#include "access/gist_private.h"
+#include "access/spgist_private.h"
+#include "access/relscan.h"
+#include "catalog/namespace.h"
+#include "catalog/pg_am.h"
+#include "catalog/pg_type.h"
+#include "funcapi.h"
+#include "miscadmin.h"
+#include "utils/builtins.h"
+#include "utils/datum.h"
+#include "utils/varlena.h"
+
+typedef struct SPGistPrintStackElem
+{
+ ItemPointerData iptr;
+ int16 nlabel;
+ int level;
+} SPGistPrintStackElem;
+
+typedef struct SPGistPrint
+{
+ SpGistState state;
+ Relation index;
+ Datum dvalues[8 /* see CreateTemplateTupleDesc call */ ];
+ bool nulls[8 /* see CreateTemplateTupleDesc call */ ];
+ List *stack;
+} SPGistPrint;
+
+#define IsIndex(r) ((r)->rd_rel->relkind == RELKIND_INDEX)
+#define IsSpGist(r) ((r)->rd_rel->relam == SPGIST_AM_OID)
+
+static void
+pushSPGistPrint(FuncCallContext *funcctx, SPGistPrint * prst, ItemPointer ip,
+ int level)
+{
+ MemoryContext oldcontext;
+ SPGistPrintStackElem *e;
+
+ oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
+
+ e = palloc(sizeof(*e));
+ e->iptr = *ip;
+ e->nlabel = 0;
+ e->level = level;
+ prst->stack = lcons(e, prst->stack);
+
+ MemoryContextSwitchTo(oldcontext);
+}
+
+static void
+close_spgist_print(SPGistPrint * prst)
+{
+ index_close(prst->index, AccessExclusiveLock);
+}
+
+PG_FUNCTION_INFO_V1(spgist_stats);
+PG_FUNCTION_INFO_V1(spgist_print);
+
+/*
+ * spgist_stats
+ * Show statistics about SP-GiST tree.
+ *
+ * Usage:
+ * SELECT spgist_stats('spgist_idx');
+ */
+Datum
+spgist_stats(PG_FUNCTION_ARGS)
+{
+ text *name = PG_GETARG_TEXT_P(0);
+ RangeVar *relvar;
+ Relation index;
+ BlockNumber blkno;
+ BlockNumber totalPages = 0,
+ innerPages = 0,
+ leafPages = 0,
+ emptyPages = 0,
+ deletedPages = 0;
+ double usedSpace = 0.0,
+ usedLeafSpace = 0.0,
+ usedInnerSpace = 0.0;
+ char res[1024];
+ int bufferSize = -1;
+ int64 innerTuples = 0,
+ leafTuples = 0,
+ nAllTheSame = 0,
+ nLeafPlaceholder = 0,
+ nInnerPlaceholder = 0,
+ nLeafRedirect = 0,
+ nInnerRedirect = 0;
+
+ relvar = makeRangeVarFromNameList(textToQualifiedNameList(name));
+ index = relation_openrv(relvar, AccessExclusiveLock);
+
+ if (!IsIndex(index) || !IsSpGist(index))
+ elog(ERROR, "relation \"%s\" is not an SPGiST index",
+ RelationGetRelationName(index));
+
+ totalPages = RelationGetNumberOfBlocks(index);
+
+ for (blkno = SPGIST_ROOT_BLKNO; blkno < totalPages; blkno++)
+ {
+ Buffer buffer;
+ Page page;
+ int pageFree;
+
+ buffer = ReadBuffer(index, blkno);
+ LockBuffer(buffer, BUFFER_LOCK_SHARE);
+
+ page = BufferGetPage(buffer);
+
+ if (PageIsNew(page) || SpGistPageIsDeleted(page))
+ {
+ deletedPages++;
+ UnlockReleaseBuffer(buffer);
+ continue;
+ }
+
+ if (SpGistPageIsLeaf(page))
+ {
+ leafPages++;
+ leafTuples += PageGetMaxOffsetNumber(page);
+ nLeafPlaceholder += SpGistPageGetOpaque(page)->nPlaceholder;
+ nLeafRedirect += SpGistPageGetOpaque(page)->nRedirection;
+ }
+ else
+ {
+ int i,
+ max;
+
+ innerPages++;
+ max = PageGetMaxOffsetNumber(page);
+ innerTuples += max;
+ nInnerPlaceholder += SpGistPageGetOpaque(page)->nPlaceholder;
+ nInnerRedirect += SpGistPageGetOpaque(page)->nRedirection;
+ for (i = FirstOffsetNumber; i <= max; i++)
+ {
+ SpGistInnerTuple it;
+
+ it = (SpGistInnerTuple) PageGetItem(page,
+ PageGetItemId(page, i));
+ if (it->allTheSame)
+ nAllTheSame++;
+ }
+ }
+
+ if (bufferSize < 0)
+ bufferSize = BufferGetPageSize(buffer)
+ - MAXALIGN(sizeof(SpGistPageOpaqueData))
+ - SizeOfPageHeaderData;
+
+ pageFree = PageGetExactFreeSpace(page);
+
+ usedSpace += bufferSize - pageFree;
+ if (SpGistPageIsLeaf(page))
+ usedLeafSpace += bufferSize - pageFree;
+ else
+ usedInnerSpace += bufferSize - pageFree;
+
+ if (pageFree == bufferSize)
+ emptyPages++;
+
+ UnlockReleaseBuffer(buffer);
+ }
+
+ index_close(index, AccessExclusiveLock);
+
+ totalPages--; /* discount metapage */
+
+ snprintf(res, sizeof(res),
+ "totalPages: %u\n"
+ "deletedPages: %u\n"
+ "innerPages: %u\n"
+ "leafPages: %u\n"
+ "emptyPages: %u\n"
+ "usedSpace: %.2f kbytes\n"
+ "usedInnerSpace: %.2f kbytes\n"
+ "usedLeafSpace: %.2f kbytes\n"
+ "freeSpace: %.2f kbytes\n"
+ "fillRatio: %.2f%%\n"
+ "leafTuples: " INT64_FORMAT "\n"
+ "innerTuples: " INT64_FORMAT "\n"
+ "innerAllTheSame: " INT64_FORMAT "\n"
+ "leafPlaceholders: " INT64_FORMAT "\n"
+ "innerPlaceholders: " INT64_FORMAT "\n"
+ "leafRedirects: " INT64_FORMAT "\n"
+ "innerRedirects: " INT64_FORMAT,
+ totalPages, deletedPages, innerPages, leafPages, emptyPages,
+ usedSpace / 1024.0,
+ usedInnerSpace / 1024.0,
+ usedLeafSpace / 1024.0,
+ (((double) bufferSize) * ((double) totalPages) - usedSpace) / 1024,
+ 100.0 * (usedSpace / (((double) bufferSize) * ((double) totalPages))),
+ leafTuples, innerTuples, nAllTheSame,
+ nLeafPlaceholder, nInnerPlaceholder,
+ nLeafRedirect, nInnerRedirect);
+
+ PG_RETURN_TEXT_P(CStringGetTextDatum(res));
+}
+
+/*
+ * spgist_print
+ * Prints objects stored in GiST tree, works only if objects in index have
+ * textual representation (type_out functions should be implemented for the
+ * given object type).
+ */
+Datum
+spgist_print(PG_FUNCTION_ARGS)
+{
+ FuncCallContext *funcctx;
+ SPGistPrint *prst;
+ SPGistPrintStackElem *s;
+ HeapTuple htuple;
+ Datum result;
+ MemoryContext oldcontext;
+
+ if (SRF_IS_FIRSTCALL())
+ {
+ text *name = PG_GETARG_TEXT_P(0);
+ RangeVar *relvar;
+ Relation index;
+ ItemPointerData ipd;
+ TupleDesc tupdesc;
+
+ funcctx = SRF_FIRSTCALL_INIT();
+ relvar = makeRangeVarFromNameList(textToQualifiedNameList(name));
+ index = relation_openrv(relvar, AccessExclusiveLock);
+
+ if (!IsIndex(index) || !IsSpGist(index))
+ elog(ERROR, "relation \"%s\" is not an SPGiST index",
+ RelationGetRelationName(index));
+
+ oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
+
+ prst = palloc(sizeof(*prst));
+
+ prst->index = index;
+ initSpGistState(&prst->state, index);
+
+ tupdesc = CreateTemplateTupleDesc(3 /* types */ + 1 /* level */ +
+ 1 /* nlabel */ + 2 /* tids */ +
+ 1, false);
+ TupleDescInitEntry(tupdesc, 1, "tid", TIDOID, -1, 0);
+ TupleDescInitEntry(tupdesc, 2, "allthesame", BOOLOID, -1, 0);
+ TupleDescInitEntry(tupdesc, 3, "node", INT4OID, -1, 0);
+ TupleDescInitEntry(tupdesc, 4, "level", INT4OID, -1, 0);
+ TupleDescInitEntry(tupdesc, 5, "tid_pointer", TIDOID, -1, 0);
+ TupleDescInitEntry(tupdesc, 6, "prefix",
+ (prst->state.attPrefixType.type == VOIDOID) ? INT4OID
+ : prst->state.attPrefixType.type,
+ -1, 0);
+ TupleDescInitEntry(tupdesc, 7, "label",
+ (prst->state.attLabelType.type == VOIDOID) ? INT4OID
+ : prst->state.attLabelType.type,
+ -1, 0);
+ TupleDescInitEntry(tupdesc, 8, "leaf",
+ (prst->state.attType.type == VOIDOID) ? INT4OID
+ : prst->state.attType.type,
+ -1, 0);
+
+ funcctx->slot = TupleDescGetSlot(tupdesc);
+ funcctx->attinmeta = TupleDescGetAttInMetadata(tupdesc);
+
+ funcctx->user_fctx = (void *) prst;
+
+ MemoryContextSwitchTo(oldcontext);
+
+ ItemPointerSet(&ipd, SPGIST_ROOT_BLKNO, FirstOffsetNumber);
+ prst->stack = NIL;
+ pushSPGistPrint(funcctx, prst, &ipd, 1);
+
+ PG_FREE_IF_COPY(name, 0);
+ }
+
+ funcctx = SRF_PERCALL_SETUP();
+ prst = (SPGistPrint *) (funcctx->user_fctx);
+
+next:
+ for (;;)
+ {
+ if (prst->stack == NIL)
+ {
+ close_spgist_print(prst);
+ SRF_RETURN_DONE(funcctx);
+ }
+
+ CHECK_FOR_INTERRUPTS();
+
+ s = (SPGistPrintStackElem *) linitial(prst->stack);
+ prst->stack = list_delete_first(prst->stack);
+
+ if (ItemPointerIsValid(&s->iptr))
+ break;
+ free(s);
+ }
+
+ do
+ {
+ Buffer buffer;
+ Page page;
+ SpGistDeadTuple dtuple;
+ ItemPointer tid;
+
+ buffer = ReadBuffer(prst->index, ItemPointerGetBlockNumber(&s->iptr));
+ LockBuffer(buffer, BUFFER_LOCK_SHARE);
+
+ page = BufferGetPage(buffer);
+ if (ItemPointerGetOffsetNumber(&s->iptr) > PageGetMaxOffsetNumber(page))
+ {
+ UnlockReleaseBuffer(buffer);
+ pfree(s);
+ goto next;
+ }
+
+ dtuple = (SpGistDeadTuple) PageGetItem(page,
+ PageGetItemId(page,
+ ItemPointerGetOffsetNumber(&s->iptr)));
+
+ if (dtuple->tupstate != SPGIST_LIVE)
+ {
+ UnlockReleaseBuffer(buffer);
+ pfree(s);
+ goto next;
+ }
+
+ if (SpGistPageIsLeaf(page))
+ {
+ SpGistLeafTuple leafTuple = (SpGistLeafTuple) dtuple;
+
+ tid = palloc(sizeof(ItemPointerData));
+ *tid = s->iptr;
+ prst->dvalues[0] = PointerGetDatum(tid);
+ prst->nulls[0] = false;
+ prst->nulls[1] = true;
+ prst->nulls[2] = true;
+ prst->dvalues[3] = s->level;
+ prst->nulls[3] = false;
+ prst->nulls[4] = true;
+ prst->nulls[5] = true;
+ prst->nulls[6] = true;
+ prst->dvalues[7] = datumCopy(SGLTDATUM(leafTuple, &prst->state),
+ prst->state.attType.attbyval,
+ prst->state.attType.attlen);
+ prst->nulls[7] = false;
+ }
+ else
+ {
+ SpGistInnerTuple innerTuple = (SpGistInnerTuple) dtuple;
+ int i;
+ SpGistNodeTuple node;
+
+ SGITITERATE(innerTuple, i, node)
+ {
+ if (ItemPointerIsValid(&node->t_tid))
+ {
+ if (i >= s->nlabel)
+ break;
+ }
+ }
+
+ if (i >= innerTuple->nNodes)
+ {
+ UnlockReleaseBuffer(buffer);
+ pfree(s);
+ goto next;
+
+ }
+
+ tid = palloc(sizeof(ItemPointerData));
+ *tid = s->iptr;
+ prst->dvalues[0] = PointerGetDatum(tid);
+ prst->nulls[0] = false;
+ prst->dvalues[1] = innerTuple->allTheSame;
+ prst->nulls[1] = false;
+ prst->dvalues[2] = Int32GetDatum(s->nlabel);
+ prst->nulls[2] = false;
+ prst->dvalues[3] = s->level;
+ prst->nulls[3] = false;
+ tid = palloc(sizeof(ItemPointerData));
+ *tid = node->t_tid;
+ prst->dvalues[4] = PointerGetDatum(tid);
+ prst->nulls[4] = false;
+ if (innerTuple->prefixSize > 0)
+ {
+ prst->dvalues[5] = datumCopy(SGITDATUM(innerTuple, &prst->state),
+ prst->state.attPrefixType.attbyval,
+ prst->state.attPrefixType.attlen);
+ prst->nulls[5] = false;
+ }
+ else
+ prst->nulls[5] = true;
+ if (!IndexTupleHasNulls(node))
+ {
+ prst->dvalues[6] = datumCopy(SGNTDATUM(node, &prst->state),
+ prst->state.attLabelType.attbyval,
+ prst->state.attLabelType.attlen);
+ prst->nulls[6] = false;
+ }
+ else
+ prst->nulls[6] = true;
+ prst->nulls[7] = true;
+
+ pushSPGistPrint(funcctx, prst, &node->t_tid, s->level + 1);
+ s->nlabel = i + 1;
+ oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
+ prst->stack = lcons(s, prst->stack);
+ MemoryContextSwitchTo(oldcontext);
+ s = NULL;
+ }
+
+ UnlockReleaseBuffer(buffer);
+ if (s)
+ pfree(s);
+ } while (0);
+
+ htuple = heap_form_tuple(funcctx->attinmeta->tupdesc,
+ prst->dvalues,
+ prst->nulls);
+ result = TupleGetDatum(funcctx->slot, htuple);
+
+ SRF_RETURN_NEXT(funcctx, result);
+}
diff --git a/contrib/pageinspect/sql/gin.sql b/contrib/pageinspect/sql/gin.sql
index d516ed3..45a136f 100644
--- a/contrib/pageinspect/sql/gin.sql
+++ b/contrib/pageinspect/sql/gin.sql
@@ -17,3 +17,15 @@ SELECT COUNT(*) > 0
FROM gin_leafpage_items(get_raw_page('test1_y_idx',
(pg_relation_size('test1_y_idx') /
current_setting('block_size')::bigint)::int - 1));
+
+\x
+
+CREATE TABLE test__int(a int[]);
+\copy test__int from 'data/test__int.data'
+
+CREATE INDEX gin_idx ON test__int USING gin ( a );
+
+INSERT INTO test__int ( SELECT ARRAY[t] || '{1000}'::_int4 FROM generate_series (1,300) as t );
+INSERT INTO test__int ( SELECT ARRAY[t] || '{1001}'::_int4 FROM generate_series (1,300) as t, generate_series(1,12) );
+VACUUM ANALYZE test__int;
+SELECT * FROM gin_value_count('gin_idx') as t(value int, nrow int);
diff --git a/contrib/pageinspect/sql/gist.sql b/contrib/pageinspect/sql/gist.sql
new file mode 100644
index 0000000..04e7daf
--- /dev/null
+++ b/contrib/pageinspect/sql/gist.sql
@@ -0,0 +1,6 @@
+CREATE TABLE gist_table (t box);
+\copy gist_table from 'data/rect.data'
+
+CREATE INDEX gist_idx ON gist_table USING gist (t);
+
+SELECT gist_stats('gist_idx');
diff --git a/contrib/pageinspect/sql/spgist.sql b/contrib/pageinspect/sql/spgist.sql
new file mode 100644
index 0000000..2bb6ac5
--- /dev/null
+++ b/contrib/pageinspect/sql/spgist.sql
@@ -0,0 +1,11 @@
+CREATE TABLE spgist_table (t box);
+\copy spgist_table from 'data/rect.data'
+
+SELECT center(t) AS p INTO spgist_table_p FROM spgist_table;
+
+CREATE INDEX spgist_idx ON spgist_table_p USING spgist (p);
+CREATE INDEX kdspgist_idx ON spgist_table_p USING spgist (p kd_point_ops);
+
+SELECT spgist_stats('spgist_idx');
+SELECT * FROM spgist_print('kdspgist_idx') as t(tid tid, allthesame bool, node_n int, level int, tid_pointer tid, prefix float8, node_label int, leaf_value point);
+SELECT * FROM spgist_print('spgist_idx') as t(tid tid, allthesame bool, node_n int, level int, tid_pointer tid, prefix point, node_label int, leaf_value point) WHERE level = 1;
diff --git a/doc/src/sgml/pageinspect.sgml b/doc/src/sgml/pageinspect.sgml
index e46f5ca..029832d 100644
--- a/doc/src/sgml/pageinspect.sgml
+++ b/doc/src/sgml/pageinspect.sgml
@@ -484,6 +484,119 @@ test=# SELECT * FROM brin_page_items(get_raw_page('brinidx', 5),
<variablelist>
<varlistentry>
<term>
+ <function>gin_value_count(gin_index text) returns setof record</function>
+ <indexterm>
+ <primary>gin_value_count</primary>
+ </indexterm>
+ </term>
+
+ <listitem>
+ <para>
+ <function>gin_value_count</function> prints estimated counts for each
+ indexed value. The single argument version will return results for the first
+ column of an index. For example:
+<screen>
+test=# SELECT * FROM gin_value_count('gin_idx') as t(value int, nrow int) where nrow > 250;
+ value | nrow
+ -------+------
+ 31 | 254
+ 47 | 251
+ 52 | 257
+ 59 | 259
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <function>gin_value_count(gin_index text, colnumber int) returns setof record</function>
+ <indexterm>
+ <primary>gin_value_count</primary>
+ </indexterm>
+ </term>
+
+ <listitem>
+ <para>
+ <function>gin_value_count</function> prints estimated counts for each
+ indexed value for a given column (starting form zero). For example:
+<screen>
+test=# SELECT * FROM gin_value_count('gin_idx', 0) as t(value int, nrow int) where nrow > 250;
+ value | nrow
+ -------+------
+ 31 | 254
+ 47 | 251
+ 52 | 257
+ 59 | 259
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <function>gin_count_estimate(gin_index text, query tsquery) returns bigint</function>
+ <indexterm>
+ <primary>gin_count_estimate</primary>
+ </indexterm>
+ </term>
+
+ <listitem>
+ <para>
+ <function>gin_count_estimate</function> outputs the number of indexed
+ rows matched by a query. It doesn't touch heap at all. For example:
+<screen>
+test=# select gin_count_estimate('qq', 'star');
+ gin_count_estimate
+--------------------
+ 790
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+
+
+ <varlistentry>
+ <term>
+ <function>gin_stats(gin_index text) returns text</function>
+ <indexterm>
+ <primary>gin_stats</primary>
+ </indexterm>
+ </term>
+
+ <listitem>
+ <para>
+ <function>gin_stats</function> Prints various statistics about index
+ internals. For example:
+<screen>
+test=# SELECT gin_stats('gin_idx');
+ gin_stats
+------------------------------
+ totalPages: 32 +
+ dataPages: 1 +
+ dataInnerPages: 0 +
+ dataLeafPages: 1 +
+ dataInnerFreeSpace: 0 +
+ dataLeafFreeSpace: 4454 +
+ dataInnerTuplesCount: 0 +
+ dataLeafIptrsCount: 3600 +
+ entryPages: 31 +
+ entryInnerPages: 21 +
+ entryLeafPages: 10 +
+ entryInnerFreeSpace: 15160+
+ entryLeafFreeSpace: 32788+
+ entryInnerTuplesCount: 7810 +
+ entryLeafTuplesCount: 305 +
+ entryPostingSize: 42122+
+ entryPostingCount: 96759+
+ entryAttrSize: 64924+
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
<function>gin_metapage_info(page bytea) returns record</function>
<indexterm>
<primary>gin_metapage_info</primary>
@@ -717,4 +830,281 @@ mapp | {65}
</variablelist>
</sect2>
+ <sect2>
+ <title>GiST Functions</title>
+
+ <variablelist>
+ <varlistentry>
+ <term>
+ <function>gist_stats(indexname text) returns text</function>
+ <indexterm>
+ <primary>gist_stats</primary>
+ </indexterm>
+ </term>
+
+ <listitem>
+ <para>
+ <function>gist_stats</function> returns information about
+ a <acronym>GiST</acronym> index. For example:
+<screen>
+test=# SELECT gist_stats('gist_index');
+ gist_stats
+-----------------------------------------
+ Number of levels: 2 +
+ Number of pages: 29 +
+ Number of leaf pages: 28 +
+ Number of tuples: 3406 +
+ Number of invalid tuples: 0 +
+ Number of leaf tuples: 3378 +
+ Total size of tuples: 143516 bytes+
+ Total size of leaf tuples: 142296 bytes+
+ Total size of index: 237568 bytes+
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <function>gist_tree(indexname text, maxlevel int4) returns text</function>
+ <indexterm>
+ <primary>gist_tree</primary>
+ </indexterm>
+ </term>
+ <listitem>
+ <para>
+ <function>gist_tree</function> shows <acronym>GiST</acronym> tree up to
+ <parameter>maxlevel</parameter>. For example:
+<screen>
+test=# SELECT gist_tree('gist_index', 0);
+ 0(l:0) blk: 0 numTuple: 29 free: 6888b(15.63%)
+</screen>
+ Designation (from left to right):
+ <itemizedlist>
+ <listitem>
+ <para>0 - page number</para>
+ </listitem>
+ <listitem>
+ <para>(l:0) - tree level</para>
+ </listitem>
+ <listitem>
+ <para>blk: 0 - block number</para>
+ </listitem>
+ <listitem>
+ <para>numTuple: 29 - the number of tuples</para>
+ </listitem>
+ <listitem>
+ <para>free: 6888b - free space in bytes</para>
+ </listitem>
+ <listitem>
+ <para>(15.63%) - occupied space in percents</para>
+ </listitem>
+ </itemizedlist>
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <function>gist_tree(indexname text) returns text</function>
+ <indexterm>
+ <primary>gist_tree</primary>
+ </indexterm>
+ </term>
+ <listitem>
+ <para>
+ <function>gist_tree</function> shows full <acronym>GiST</acronym> tree.
+ For example:
+<screen>
+test=# SELECT gist_tree('gist_index');
+ 0(l:0) blk: 0 numTuple: 29 free: 6888b(15.63%)
+ 1(l:1) blk: 13 numTuple: 180 free: 244b(97.01%)
+ 2(l:1) blk: 11 numTuple: 175 free: 464b(94.32%)
+ 3(l:1) blk: 2 numTuple: 101 free: 3720b(54.43%)
+ 4(l:1) blk: 17 numTuple: 111 free: 3280b(59.82%)
+ 5(l:1) blk: 18 numTuple: 101 free: 3720b(54.43%)
+ 6(l:1) blk: 10 numTuple: 98 free: 3852b(52.82%)
+ 7(l:1) blk: 19 numTuple: 111 free: 3280b(59.82%)
+ 8(l:1) blk: 9 numTuple: 97 free: 3896b(52.28%)
+ 9(l:1) blk: 20 numTuple: 104 free: 3588b(56.05%)
+ 10(l:1) blk: 14 numTuple: 96 free: 3940b(51.74%)
+ 11(l:1) blk: 21 numTuple: 106 free: 3500b(57.13%)
+ 12(l:1) blk: 7 numTuple: 103 free: 3632b(55.51%)
+ 13(l:1) blk: 1 numTuple: 101 free: 3720b(54.43%)
+ 14(l:1) blk: 16 numTuple: 97 free: 3896b(52.28%)
+ 15(l:1) blk: 24 numTuple: 103 free: 3632b(55.51%)
+ 16(l:1) blk: 4 numTuple: 98 free: 3852b(52.82%)
+ 17(l:1) blk: 25 numTuple: 98 free: 3852b(52.82%)
+ 18(l:1) blk: 3 numTuple: 97 free: 3896b(52.28%)
+ 19(l:1) blk: 26 numTuple: 96 free: 3940b(51.74%)
+ 20(l:1) blk: 6 numTuple: 103 free: 3632b(55.51%)
+ 21(l:1) blk: 8 numTuple: 162 free: 1036b(87.31%)
+ 22(l:1) blk: 23 numTuple: 94 free: 4028b(50.66%)
+ 23(l:1) blk: 12 numTuple: 82 free: 4556b(44.19%)
+ 24(l:1) blk: 27 numTuple: 105 free: 3544b(56.59%)
+ 25(l:1) blk: 5 numTuple: 90 free: 4204b(48.51%)
+ 26(l:1) blk: 28 numTuple: 100 free: 3764b(53.90%)
+ 27(l:1) blk: 22 numTuple: 101 free: 3720b(54.43%)
+ 28(l:1) blk: 15 numTuple: 95 free: 3984b(51.20%)
+ 29(l:1) blk: 29 numTuple: 95 free: 3984b(51.20%)
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <function>gist_print(indexname text) returns setof record</function>
+ <indexterm>
+ <primary>gist_print</primary>
+ </indexterm>
+ </term>
+ <listitem>
+ <para>
+ <function>gist_print</function> prints objects stored in a
+ <acronym>GiST</acronym> tree. It works only if the objects in the index have
+ textual representation (<function>type_out</function> functions should be
+ implemented for the given object type). It's known to work with R-tree
+ <acronym>GiST</acronym> based indexes. Note: in example below, objects are
+ of type box. For example:
+<screen>
+test=# SELECT * FROM gist_print('gist_index') AS t(level int, valid bool, a box) WHERE level = 1;
+ level | valid | a
+-------+-------+-----------------------------
+ 1 | t | (37357,50073),(34242,357)
+ 1 | t | (43499,49770),(40358,43)
+ 1 | t | (31193,24679),(25047,12410)
+ 1 | t | (31018,12142),(25083,6)
+ 1 | t | (49944,25174),(43471,12802)
+ 1 | t | (12577,49757),(6302,37534)
+ 1 | t | (12528,37333),(6171,24861)
+ 1 | t | (50027,49751),(46817,25462)
+ 1 | t | (46870,49912),(43664,25722)
+ 1 | t | (24855,25574),(12447,19263)
+ 1 | t | (25054,19126),(12403,12796)
+ 1 | t | (32737,49923),(31178,1038)
+ 1 | t | (3184,24465),(15,81)
+ 1 | t | (24951,49983),(12740,44000)
+ 1 | t | (24919,43956),(12617,37901)
+ 1 | t | (40387,49852),(37338,25217)
+ 1 | t | (40325,24963),(37375,491)
+ 1 | t | (24919,12698),(12654,6518)
+ 1 | t | (25002,6338),(12350,51)
+ 1 | t | (49985,12554),(43447,222)
+ 1 | t | (25003,37769),(12552,25573)
+ 1 | t | (34270,49382),(32763,594)
+ 1 | t | (6205,50012),(3,37527)
+ 1 | t | (6163,37358),(120,25034)
+ 1 | t | (12343,24542),(9295,294)
+ 1 | t | (9308,24151),(6234,620)
+ 1 | t | (6230,24629),(3169,108)
+ 1 | t | (31179,50040),(28113,25556)
+ 1 | t | (28048,49694),(25000,25000)
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </sect2>
+
+ <sect2>
+ <title>SP-GiST Functions</title>
+
+ <variablelist>
+ <varlistentry>
+ <term>
+ <function>spgist_stats(indexname text) returns text</function>
+ <indexterm>
+ <primary>spgist_stats</primary>
+ </indexterm>
+ </term>
+
+ <listitem>
+ <para>
+ <function>spgist_stats</function> returns information about
+ a <acronym>SP-GiST</acronym> index. For example:
+<screen>
+test=# SELECT spgist_stats('spgist_idx');
+ spgist_stats
+----------------------------------
+ totalPages: 21 +
+ deletedPages: 0 +
+ innerPages: 3 +
+ leafPages: 18 +
+ emptyPages: 1 +
+ usedSpace: 121.27 kbytes+
+ freeSpace: 46.07 kbytes +
+ fillRatio: 72.47% +
+ leafTuples: 3669 +
+ innerTuples: 20 +
+ innerAllTheSame: 0 +
+ leafPlaceholders: 569 +
+ innerPlaceholders: 0 +
+ leafRedirects: 0 +
+ innerRedirects: 0 +
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term>
+ <function>spgist_print(indexname text) returns setof record</function>
+ <indexterm>
+ <primary>spgist_print</primary>
+ </indexterm>
+ </term>
+
+ <listitem>
+ <para>
+ <function>spgist_print</function> prints objects stored in a
+ <acronym>SP-GiST</acronym> tree. It works only if the objects in the index have
+ textual representation (<function>type_out</function> functions should
+ be implemented for the given object type).
+ <itemizedlist>
+ <listitem>
+ <para>
+ Note 1. in the example below we used quad_point_ops which uses point
+ for leaf and prefix value, but doesn't use node_label at all.
+ Use type 'int' as dummy type for prefix or/and node_label.
+ </para>
+ </listitem>
+ <listitem>
+ <para>
+ Note 2.
+<screen>
+ quad_point_ops: prefix point, node_label int, leaf_value point
+ kd_point_ops: prefix float, node_label int, leaf_value point
+ text_ops: prefix text, node_label char, leaf_value text
+</screen>
+ </para>
+ </listitem>
+ </itemizedlist>
+ For example:
+<screen>
+test=# SELECT * FROM spgist_print('spgist_idx') as t
+ (
+ tid tid,
+ allthesame bool,
+ node_n int,
+ level int,
+ tid_pointer tid,
+ prefix point,
+ node_label int,
+ leaf_value point
+ ) where level = 1;
+ tid | allthesame | node_n | level | tid_pointer | prefix | node_label | leaf_value
+-------+------------+--------+-------+-------------+-------------------------------------+------------+------------
+ (1,1) | f | 0 | 1 | (5,4) | (24530.2070484581,23595.7092511013) | |
+ (1,1) | f | 1 | 1 | (5,3) | (24530.2070484581,23595.7092511013) | |
+ (1,1) | f | 2 | 1 | (5,2) | (24530.2070484581,23595.7092511013) | |
+ (1,1) | f | 3 | 1 | (5,1) | (24530.2070484581,23595.7092511013) | |
+
+</screen>
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </sect2>
+
</sect1>
Re: [PATCH] Pageinspect - add functions on GIN and GiST indexes from gevel
Hi,
On 07/21/2017 03:40 PM, Alexander Korotkov wrote:
Hi, Alexey!
On Fri, Jul 21, 2017 at 3:05 PM, Alexey Chernyshov
<a.chernyshov@postgrespro.ru <mailto:a.chernyshov@postgrespro.ru>> wrote:the following patch transfers functionality from gevel module
(http://www.sai.msu.su/~megera/wiki/Gevel
<http://www.sai.msu.su/~megera/wiki/Gevel>) which provides functions for
analyzing GIN and GiST indexes to pageinspect. Gevel was originally
designed by Oleg Bartunov, and Teodor Sigaev for developers of GiST and
GIN indexes.It's very good that you've picked up this work! pageinspect is lacking
of this functionality.Functions added:
- gist_stat(text) - shows statistics on GiST Tree
- gist_tree(text) - shows GiST tree
- gist_tree(text, int4) - shows GiST tree up to MAXLEVEL
- gist_print(text) - prints objects stored in GiST tree
- spgist_stat(text) - shows statistics on SP-GiST
- spgist_print(text) - prints objects stored in index
- gin_value_count() - originally gin_stat(text) - prints estimated
counts
for index values
- gin_stats() - originally gin_statpage(text) - shows statistics
- gin_count_estimate(text, tsquery) - shows number of indexed rows
matched
queryTests also transferred, docs for new functions are added. I run pgindent
over the code, but the result is different from those I expected, so
I leave
pgindented one.
The patch is applicable to the commit
866f4a7c210857aa342bf901558d170325094dde.As we can see, gevel contains functions which analyze the whole index.
pageinspect is written in another manner: it gives you functionality to
analyze individual pages, tuples and so on.
Thus, we probably shouldn't try to move gevel functions to pageinspect
"as is". They should be rewritten in more granular manner as well as
other pageinspact functions are. Any other opinions?
I agree with Alexander that pageinspect is written in a very different
way - as the extension name suggests, it's used to inspect pages. The
proposed patch uses a very different approach, reading the whole index,
not individual pages. Why should it be part of pageinspect?
For example we have pgstattuple extension, which seems like a better
match. Or just create a new extension - if the code is valuable, surely
we can live one more extension instead of smuggling it in inside
pageinspect.
regards
--
Tomas Vondra http://www.2ndQuadrant.com
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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Re: [PATCH] Pageinspect - add functions on GIN and GiST indexes from gevel
On Fri, Sep 8, 2017 at 3:38 AM, Tomas Vondra
<tomas.vondra@2ndquadrant.com> wrote:
Hi,
On 07/21/2017 03:40 PM, Alexander Korotkov wrote:
Hi, Alexey!
On Fri, Jul 21, 2017 at 3:05 PM, Alexey Chernyshov
<a.chernyshov@postgrespro.ru <mailto:a.chernyshov@postgrespro.ru>> wrote:the following patch transfers functionality from gevel module
(http://www.sai.msu.su/~megera/wiki/Gevel
<http://www.sai.msu.su/~megera/wiki/Gevel>) which provides functions for
analyzing GIN and GiST indexes to pageinspect. Gevel was originally
designed by Oleg Bartunov, and Teodor Sigaev for developers of GiST and
GIN indexes.It's very good that you've picked up this work! pageinspect is lacking
of this functionality.Functions added:
- gist_stat(text) - shows statistics on GiST Tree
- gist_tree(text) - shows GiST tree
- gist_tree(text, int4) - shows GiST tree up to MAXLEVEL
- gist_print(text) - prints objects stored in GiST tree
- spgist_stat(text) - shows statistics on SP-GiST
- spgist_print(text) - prints objects stored in index
- gin_value_count() - originally gin_stat(text) - prints estimated
counts
for index values
- gin_stats() - originally gin_statpage(text) - shows statistics
- gin_count_estimate(text, tsquery) - shows number of indexed rows
matched
queryTests also transferred, docs for new functions are added. I run pgindent
over the code, but the result is different from those I expected, so
I leave
pgindented one.
The patch is applicable to the commit
866f4a7c210857aa342bf901558d170325094dde.As we can see, gevel contains functions which analyze the whole index.
pageinspect is written in another manner: it gives you functionality to
analyze individual pages, tuples and so on.
Thus, we probably shouldn't try to move gevel functions to pageinspect
"as is". They should be rewritten in more granular manner as well as
other pageinspact functions are. Any other opinions?I agree with Alexander that pageinspect is written in a very different
way - as the extension name suggests, it's used to inspect pages. The
proposed patch uses a very different approach, reading the whole index,
not individual pages. Why should it be part of pageinspect?For example we have pgstattuple extension, which seems like a better
match. Or just create a new extension - if the code is valuable, surely
we can live one more extension instead of smuggling it in inside
pageinspect.
Finally, i got some time to look into this patch and surprisingly I
didn't find any function returning information at page level instead
all the SQL functions are returning information at index level.
Therefore, i too feel that it should be either integrated with
pgstattuple which could a better match as Tomas also mentioned or may
be add a new contrib module itself. I think, adding a new contrib
module looks like a better option. The reason being, it doesn't simply
include the function for showing index level statistics (for e.g..
index size, no of rows, values..e.t.c) like pgstattuple does but,
also, displays information contained in a page for e.g. the object
stored in the page, it's tid e.t.c. So, more or less, I would say
that, it's the mixture of pageinspect and pgstattuple module and
therefore, i feel, adding it as a new extension would be a better
choice. Thought?
--
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Ashutosh Sharma
EnterpriseDB:http://www.enterprisedb.com
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Re: [PATCH] Pageinspect - add functions on GIN and GiST indexes from gevel
On Sat, 9 Sep 2017 13:53:35 +0530
Ashutosh Sharma <ashu.coek88@gmail.com> wrote:
Finally, i got some time to look into this patch and surprisingly I
didn't find any function returning information at page level instead
all the SQL functions are returning information at index level.
Therefore, i too feel that it should be either integrated with
pgstattuple which could a better match as Tomas also mentioned or may
be add a new contrib module itself. I think, adding a new contrib
module looks like a better option. The reason being, it doesn't simply
include the function for showing index level statistics (for e.g..
index size, no of rows, values..e.t.c) like pgstattuple does but,
also, displays information contained in a page for e.g. the object
stored in the page, it's tid e.t.c. So, more or less, I would say
that, it's the mixture of pageinspect and pgstattuple module and
therefore, i feel, adding it as a new extension would be a better
choice. Thought?
Thank you for your interest, I will add a new contrib module named,
say, indexstat. I think we can add statistics on other indexes in the
future.
--
Alexey Chernyshov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
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Re: [PATCH] Pageinspect - add functions on GIN and GiST indexes from gevel
On Wed, Sep 13, 2017 at 1:15 PM, Alexey Chernyshov
<a.chernyshov@postgrespro.ru> wrote:
On Sat, 9 Sep 2017 13:53:35 +0530
Ashutosh Sharma <ashu.coek88@gmail.com> wrote:Finally, i got some time to look into this patch and surprisingly I
didn't find any function returning information at page level instead
all the SQL functions are returning information at index level.
Therefore, i too feel that it should be either integrated with
pgstattuple which could a better match as Tomas also mentioned or may
be add a new contrib module itself. I think, adding a new contrib
module looks like a better option. The reason being, it doesn't simply
include the function for showing index level statistics (for e.g..
index size, no of rows, values..e.t.c) like pgstattuple does but,
also, displays information contained in a page for e.g. the object
stored in the page, it's tid e.t.c. So, more or less, I would say
that, it's the mixture of pageinspect and pgstattuple module and
therefore, i feel, adding it as a new extension would be a better
choice. Thought?Thank you for your interest, I will add a new contrib module named,
say, indexstat. I think we can add statistics on other indexes in the
future.
I think we should wait for experts opinion and then take a call. I am
not expert. I just gave my opinion as i have worked in this area
earlier when working for hash index. Thanks.
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Ashutosh Sharma
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Re: [PATCH] Pageinspect - add functions on GIN and GiST indexes from gevel
On Wed, Sep 13, 2017 at 10:57 AM, Ashutosh Sharma <ashu.coek88@gmail.com>
wrote:
On Wed, Sep 13, 2017 at 1:15 PM, Alexey Chernyshov
<a.chernyshov@postgrespro.ru> wrote:On Sat, 9 Sep 2017 13:53:35 +0530
Ashutosh Sharma <ashu.coek88@gmail.com> wrote:Finally, i got some time to look into this patch and surprisingly I
didn't find any function returning information at page level instead
all the SQL functions are returning information at index level.
Therefore, i too feel that it should be either integrated with
pgstattuple which could a better match as Tomas also mentioned or may
be add a new contrib module itself. I think, adding a new contrib
module looks like a better option. The reason being, it doesn't simply
include the function for showing index level statistics (for e.g..
index size, no of rows, values..e.t.c) like pgstattuple does but,
also, displays information contained in a page for e.g. the object
stored in the page, it's tid e.t.c. So, more or less, I would say
that, it's the mixture of pageinspect and pgstattuple module and
therefore, i feel, adding it as a new extension would be a better
choice. Thought?Thank you for your interest, I will add a new contrib module named,
say, indexstat. I think we can add statistics on other indexes in the
future.I think we should wait for experts opinion and then take a call. I am
not expert. I just gave my opinion as i have worked in this area
earlier when working for hash index. Thanks.
I'm not sure that we should port these functions from gevel directly. We
could try to re-implement similar functionality which fits pageinspect
approach better. In particular, we can implement some low-level functions
whose show detailed information at page level. And on top of them we can
implement analogues of gevel functions in SQL or PL/pgSQL. Is it feasible?
------
Alexander Korotkov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company
Re: [PATCH] Pageinspect - add functions on GIN and GiST indexes from gevel
On 9/13/17 03:45, Alexey Chernyshov wrote:
On Sat, 9 Sep 2017 13:53:35 +0530
Ashutosh Sharma <ashu.coek88@gmail.com> wrote:Finally, i got some time to look into this patch and surprisingly I
didn't find any function returning information at page level instead
all the SQL functions are returning information at index level.
Therefore, i too feel that it should be either integrated with
pgstattuple which could a better match as Tomas also mentioned or may
be add a new contrib module itself. I think, adding a new contrib
module looks like a better option. The reason being, it doesn't simply
include the function for showing index level statistics (for e.g..
index size, no of rows, values..e.t.c) like pgstattuple does but,
also, displays information contained in a page for e.g. the object
stored in the page, it's tid e.t.c. So, more or less, I would say
that, it's the mixture of pageinspect and pgstattuple module and
therefore, i feel, adding it as a new extension would be a better
choice. Thought?Thank you for your interest, I will add a new contrib module named,
say, indexstat. I think we can add statistics on other indexes in the
future.
A few thoughts on this current patch:
The patch no longer compiles, because of changes in the way the tuple
descriptors are accessed (I think).
I agree with the conclusion so far that this should be a new extension,
not being a good fit for an existing extension.
This kind of thing doesn't look like good design:
+<screen>
+test=# SELECT spgist_stats('spgist_idx');
+ spgist_stats
+----------------------------------
+ totalPages: 21 +
+ deletedPages: 0 +
+ innerPages: 3 +
+ leafPages: 18 +
+ emptyPages: 1 +
+ usedSpace: 121.27 kbytes+
+ freeSpace: 46.07 kbytes +
+ fillRatio: 72.47% +
+ leafTuples: 3669 +
+ innerTuples: 20 +
+ innerAllTheSame: 0 +
+ leafPlaceholders: 569 +
+ innerPlaceholders: 0 +
+ leafRedirects: 0 +
+ innerRedirects: 0 +
+</screen>This function should return a row with columns for each of these pieces
of information.
So to summarize, I think there is interest in this functionality, but
the patch needs some work.
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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Re: [HACKERS] [PATCH] Pageinspect - add functions on GIN and GiST indexes from gevel
On Thu, Nov 2, 2017 at 3:47 AM, Peter Eisentraut
<peter.eisentraut@2ndquadrant.com> wrote:
So to summarize, I think there is interest in this functionality, but
the patch needs some work.
This patch has been waiting for input from its author for three weeks,
so I am marking it as returned with feedback.
--
Michael