From 8ea02b0f2a183cab1f7c471550d5b662ad9f1fad Mon Sep 17 00:00:00 2001
From: Diego Fronza <diego.fronza@percona.com>
Date: Tue, 16 Nov 2021 13:10:56 -0300
Subject: [PATCH] PG-228: Fix hash table creation flags on PG <= 13.

Before PostgreSQL 14, HASH_STRINGS flag was not available when creating
a hash table with ShmemInitHash().

Use HASH_BLOBS for previous PostgreSQL versions.
---
 pgsm_errors.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/pgsm_errors.c b/pgsm_errors.c
index 0a4bcde..95f0197 100644
--- a/pgsm_errors.c
+++ b/pgsm_errors.c
@@ -47,6 +47,12 @@ static HTAB *pgsm_errors_ht = NULL;
 void psgm_errors_init(void)
 {
 	HASHCTL info;
+#if PG_VERSION_NUM >= 140000
+	int flags = HASH_ELEM | HASH_STRINGS;
+#else
+	int flags = HASH_ELEM | HASH_BLOBS;
+#endif
+
 
 	memset(&info, 0, sizeof(info));
 	info.keysize = ERROR_MSG_MAX_LEN;
@@ -55,7 +61,7 @@ void psgm_errors_init(void)
 									PSGM_ERRORS_MAX,  /* initial size */
 									PSGM_ERRORS_MAX,  /* maximum size */
 									&info,
-									HASH_ELEM | HASH_STRINGS);
+									flags);
 }
 
 size_t pgsm_errors_size(void)