From cd7001e9bc8b46710c948f4d9a31e173b6b2da53 Mon Sep 17 00:00:00 2001 From: Arseniy Mukhin Date: Sat, 16 Aug 2025 14:46:54 +0300 Subject: [PATCH v2] Adds check of index key size for ltree gist operator class --- contrib/ltree/ltree_gist.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/contrib/ltree/ltree_gist.c b/contrib/ltree/ltree_gist.c index 932f69bff2d..81e1e7ee5da 100644 --- a/contrib/ltree/ltree_gist.c +++ b/contrib/ltree/ltree_gist.c @@ -11,6 +11,7 @@ #include "crc32.h" #include "ltree.h" #include "utils/array.h" +#include "utils/rel.h" #define NEXTVAL(x) ( (lquery*)( (char*)(x) + INTALIGN( VARSIZE(x) ) ) ) #define ISEQ(a,b) ( (a)->numlevel == (b)->numlevel && ltree_compare(a,b)==0 ) @@ -100,6 +101,18 @@ ltree_compress(PG_FUNCTION_ARGS) { /* ltree */ ltree *val = DatumGetLtreeP(entry->key); ltree_gist *key = ltree_gist_alloc(false, NULL, 0, val, 0); + int siglen = LTREE_GET_SIGLEN(); + + if (siglen + VARSIZE(val) * 2 > GISTMaxIndexKeySize) + { + Size max_size = (GISTMaxIndexKeySize - siglen) / 2; + + ereport(ERROR, + (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED), + errmsg("index key size %zu exceeds maximum %zu for index \"%s\"", + VARSIZE(val), max_size, + RelationGetRelationName(entry->rel)))); + } retval = (GISTENTRY *) palloc(sizeof(GISTENTRY)); gistentryinit(*retval, PointerGetDatum(key), -- 2.43.0