remove separate postgres.(sh)description files

From 4a383dbb7c0ea009df593bd5589e08a6b22343f0 Mon Sep 17 00:00:00 2001
From: John Naylor <john.naylor@2ndquadrant.com>
Date: Mon, 23 Dec 2019 11:31:41 -0500
Subject: [PATCH v1] Remove separate files for the initial contents of
 pg_(sh)description

This data was only in separate files because it was the most
convenient way to handle it with a shell script. Now that we
use a general-purpose programming language, it's easy to assemble
the data into the same format as the rest of the catalogs and
output it into postgres.bki. This allows removal of some special-
purpose code from initdb.c.
---
 src/backend/catalog/Makefile  |  8 ++---
 src/backend/catalog/genbki.pl | 62 +++++++++++++++--------------------
 src/bin/initdb/initdb.c       | 44 +------------------------
 3 files changed, 30 insertions(+), 84 deletions(-)

diff --git a/src/backend/catalog/Makefile b/src/backend/catalog/Makefile
index a51153236a..252534c82b 100644
--- a/src/backend/catalog/Makefile
+++ b/src/backend/catalog/Makefile
@@ -44,8 +44,6 @@ OBJS = \
 	storage.o \
 	toasting.o
 
-BKIFILES = postgres.bki postgres.description postgres.shdescription
-
 include $(top_srcdir)/src/backend/common.mk
 
 # Note: the order of this list determines the order in which the catalog
@@ -127,8 +125,6 @@ $(top_builddir)/src/include/catalog/header-stamp: bki-stamp
 .PHONY: install-data
 install-data: bki-stamp installdirs
 	$(INSTALL_DATA) $(call vpathsearch,postgres.bki) '$(DESTDIR)$(datadir)/postgres.bki'
-	$(INSTALL_DATA) $(call vpathsearch,postgres.description) '$(DESTDIR)$(datadir)/postgres.description'
-	$(INSTALL_DATA) $(call vpathsearch,postgres.shdescription) '$(DESTDIR)$(datadir)/postgres.shdescription'
 	$(INSTALL_DATA) $(srcdir)/system_views.sql '$(DESTDIR)$(datadir)/system_views.sql'
 	$(INSTALL_DATA) $(srcdir)/information_schema.sql '$(DESTDIR)$(datadir)/information_schema.sql'
 	$(INSTALL_DATA) $(srcdir)/sql_features.txt '$(DESTDIR)$(datadir)/sql_features.txt'
@@ -138,7 +134,7 @@ installdirs:
 
 .PHONY: uninstall-data
 uninstall-data:
-	rm -f $(addprefix '$(DESTDIR)$(datadir)'/, $(BKIFILES) system_views.sql information_schema.sql sql_features.txt)
+	rm -f $(addprefix '$(DESTDIR)$(datadir)'/, postgres.bki system_views.sql information_schema.sql sql_features.txt)
 
 # postgres.bki, postgres.description, postgres.shdescription,
 # and the generated headers are in the distribution tarball,
@@ -146,4 +142,4 @@ uninstall-data:
 clean:
 
 maintainer-clean: clean
-	rm -f bki-stamp $(BKIFILES) $(GENERATED_HEADERS)
+	rm -f bki-stamp postgres.bki $(GENERATED_HEADERS)
diff --git a/src/backend/catalog/genbki.pl b/src/backend/catalog/genbki.pl
index 6eff045bd9..ac18c000e7 100644
--- a/src/backend/catalog/genbki.pl
+++ b/src/backend/catalog/genbki.pl
@@ -2,10 +2,9 @@
 #----------------------------------------------------------------------
 #
 # genbki.pl
-#    Perl script that generates postgres.bki, postgres.description,
-#    postgres.shdescription, and symbol definition headers from specially
-#    formatted header files and data files.  The BKI files are used to
-#    initialize the postgres template database.
+#    Perl script that generates postgres.bki and symbol definition
+#    headers from specially formatted header files and data files.
+#    postgres.bki is used to initialize the postgres template database.
 #
 # Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
 # Portions Copyright (c) 1994, Regents of the University of California
@@ -93,9 +92,29 @@ foreach my $header (@ARGV)
 		my $data = Catalog::ParseData($datfile, $schema, 0);
 		$catalog_data{$catname} = $data;
 
-		# Check for duplicated OIDs while we're at it.
 		foreach my $row (@$data)
 		{
+			# Generate entries for pg_description and pg_shdescription.
+			if (defined $row->{descr})
+			{
+				my %descr = (
+					objoid      => $row->{oid},
+					classoid    => $catalog->{relation_oid},
+					objsubid    => 0,
+					description => $row->{descr});
+
+				if ($catalog->{shared_relation})
+				{
+					delete $descr{objsubid};
+					push @{ $catalog_data{pg_shdescription} }, \%descr;
+				}
+				else
+				{
+					push @{ $catalog_data{pg_description}}, \%descr;
+				}
+			}
+
+			# Check for duplicated OIDs while we're at it.
 			$oidcounts{ $row->{oid} }++ if defined $row->{oid};
 		}
 	}
@@ -361,15 +380,8 @@ open my $bki, '>', $bkifile . $tmpext
 my $schemafile = $output_path . 'schemapg.h';
 open my $schemapg, '>', $schemafile . $tmpext
   or die "can't open $schemafile$tmpext: $!";
-my $descrfile = $output_path . 'postgres.description';
-open my $descr, '>', $descrfile . $tmpext
-  or die "can't open $descrfile$tmpext: $!";
-my $shdescrfile = $output_path . 'postgres.shdescription';
-open my $shdescr, '>', $shdescrfile . $tmpext
-  or die "can't open $shdescrfile$tmpext: $!";
 
-# Generate postgres.bki, postgres.description, postgres.shdescription,
-# and pg_*_d.h headers.
+# Generate postgres.bki and pg_*_d.h headers.
 
 # version marker for .bki file
 print $bki "# PostgreSQL $major_version\n";
@@ -579,22 +591,6 @@ EOM
 		# Write to postgres.bki
 		print_bki_insert(\%bki_values, $schema);
 
-		# Write comments to postgres.description and
-		# postgres.shdescription
-		if (defined $bki_values{descr})
-		{
-			if ($catalog->{shared_relation})
-			{
-				printf $shdescr "%s\t%s\t%s\n",
-				  $bki_values{oid}, $catname, $bki_values{descr};
-			}
-			else
-			{
-				printf $descr "%s\t%s\t0\t%s\n",
-				  $bki_values{oid}, $catname, $bki_values{descr};
-			}
-		}
-
 		# Emit OID symbol
 		if (defined $bki_values{oid_symbol})
 		{
@@ -673,14 +669,10 @@ print $schemapg "\n#endif\t\t\t\t\t\t\t/* SCHEMAPG_H */\n";
 # We're done emitting data
 close $bki;
 close $schemapg;
-close $descr;
-close $shdescr;
 
 # Finally, rename the completed files into place.
 Catalog::RenameTempFile($bkifile,     $tmpext);
 Catalog::RenameTempFile($schemafile,  $tmpext);
-Catalog::RenameTempFile($descrfile,   $tmpext);
-Catalog::RenameTempFile($shdescrfile, $tmpext);
 
 exit 0;
 
@@ -967,9 +959,9 @@ Options:
     --set-version    PostgreSQL version number for initdb cross-check
     --include-path   Include path in source tree
 
-genbki.pl generates BKI files and symbol definition
+genbki.pl generates postgres.bki and symbol definition
 headers from specially formatted header files and .dat
-files.  The BKI files are used to initialize the
+files.  postgres.bki is used to initialize the
 postgres template database.
 
 Report bugs to <pgsql-bugs\@lists.postgresql.org>.
diff --git a/src/bin/initdb/initdb.c b/src/bin/initdb/initdb.c
index 1f6d8939be..5cba453489 100644
--- a/src/bin/initdb/initdb.c
+++ b/src/bin/initdb/initdb.c
@@ -151,8 +151,6 @@ static int	wal_segment_size_mb;
 static const char *progname;
 static int	encodingid;
 static char *bki_file;
-static char *desc_file;
-static char *shdesc_file;
 static char *hba_file;
 static char *ident_file;
 static char *conf_file;
@@ -1644,38 +1642,11 @@ setup_sysviews(FILE *cmdfd)
 }
 
 /*
- * load description data
+ * fill in extra description data
  */
 static void
 setup_description(FILE *cmdfd)
 {
-	PG_CMD_PUTS("CREATE TEMP TABLE tmp_pg_description ( "
-				"	objoid oid, "
-				"	classname name, "
-				"	objsubid int4, "
-				"	description text);\n\n");
-
-	PG_CMD_PRINTF("COPY tmp_pg_description FROM E'%s';\n\n",
-				   escape_quotes(desc_file));
-
-	PG_CMD_PUTS("INSERT INTO pg_description "
-				" SELECT t.objoid, c.oid, t.objsubid, t.description "
-				"  FROM tmp_pg_description t, pg_class c "
-				"    WHERE c.relname = t.classname;\n\n");
-
-	PG_CMD_PUTS("CREATE TEMP TABLE tmp_pg_shdescription ( "
-				" objoid oid, "
-				" classname name, "
-				" description text);\n\n");
-
-	PG_CMD_PRINTF("COPY tmp_pg_shdescription FROM E'%s';\n\n",
-				   escape_quotes(shdesc_file));
-
-	PG_CMD_PUTS("INSERT INTO pg_shdescription "
-				" SELECT t.objoid, c.oid, t.description "
-				"  FROM tmp_pg_shdescription t, pg_class c "
-				"   WHERE c.relname = t.classname;\n\n");
-
 	/* Create default descriptions for operator implementation functions */
 	PG_CMD_PUTS("WITH funcdescs AS ( "
 				"SELECT p.oid as p_oid, o.oid as o_oid, oprname "
@@ -1689,13 +1660,6 @@ setup_description(FILE *cmdfd)
 				"  AND NOT EXISTS (SELECT 1 FROM pg_description "
 				"   WHERE objoid = o_oid AND classoid = 'pg_operator'::regclass"
 				"         AND description LIKE 'deprecated%');\n\n");
-
-	/*
-	 * Even though the tables are temp, drop them explicitly so they don't get
-	 * copied into template0/postgres databases.
-	 */
-	PG_CMD_PUTS("DROP TABLE tmp_pg_description;\n\n");
-	PG_CMD_PUTS("DROP TABLE tmp_pg_shdescription;\n\n");
 }
 
 /*
@@ -2586,8 +2550,6 @@ void
 setup_data_file_paths(void)
 {
 	set_input(&bki_file, "postgres.bki");
-	set_input(&desc_file, "postgres.description");
-	set_input(&shdesc_file, "postgres.shdescription");
 	set_input(&hba_file, "pg_hba.conf.sample");
 	set_input(&ident_file, "pg_ident.conf.sample");
 	set_input(&conf_file, "postgresql.conf.sample");
@@ -2602,13 +2564,11 @@ setup_data_file_paths(void)
 				"VERSION=%s\n"
 				"PGDATA=%s\nshare_path=%s\nPGPATH=%s\n"
 				"POSTGRES_SUPERUSERNAME=%s\nPOSTGRES_BKI=%s\n"
-				"POSTGRES_DESCR=%s\nPOSTGRES_SHDESCR=%s\n"
 				"POSTGRESQL_CONF_SAMPLE=%s\n"
 				"PG_HBA_SAMPLE=%s\nPG_IDENT_SAMPLE=%s\n",
 				PG_VERSION,
 				pg_data, share_path, bin_path,
 				username, bki_file,
-				desc_file, shdesc_file,
 				conf_file,
 				hba_file, ident_file);
 		if (show_setting)
@@ -2616,8 +2576,6 @@ setup_data_file_paths(void)
 	}
 
 	check_input(bki_file);
-	check_input(desc_file);
-	check_input(shdesc_file);
 	check_input(hba_file);
 	check_input(ident_file);
 	check_input(conf_file);
-- 
2.22.0