From d22b85aa43d44ef2524c9e77f20fb3cece41f6f1 Mon Sep 17 00:00:00 2001
From: Georgy Shelkovy <rekgrpth@gmail.com>
Date: Sun, 1 Jun 2025 14:04:07 +0500
Subject: [PATCH] Fix compatibility with pg18 (#96)

Upstream commit postgres/postgres@a8025f5 changed last argument of get_ordering_op_properties() from pointer to int16 to pointer to CompareType.
---
 hypopg_index.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/hypopg_index.c b/hypopg_index.c
index 6ec13a6..26b417a 100644
--- a/hypopg_index.c
+++ b/hypopg_index.c
@@ -77,6 +77,11 @@
 static Oid	BLOOM_AM_OID = InvalidOid;
 #endif
 
+#if PG_VERSION_NUM < 180000
+#define CompareType int16
+#define COMPARE_LT BTLessStrategyNumber
+#endif
+
 /*--- Variables exported ---*/
 
 explain_get_index_name_hook_type prev_explain_get_index_name_hook;
@@ -878,7 +883,7 @@ hypo_index_store_parsetree(IndexStmt *node, const char *queryString)
 			Oid			ltopr;
 			Oid			btopfamily;
 			Oid			btopcintype;
-			int16		btstrategy;
+			CompareType	btstrategy;
 
 			ltopr = get_opfamily_member(entry->opfamily[attn],
 										entry->opcintype[attn],
@@ -890,7 +895,7 @@ hypo_index_store_parsetree(IndexStmt *node, const char *queryString)
 										   &btopcintype,
 										   &btstrategy) &&
 				btopcintype == entry->opcintype[attn] &&
-				btstrategy == BTLessStrategyNumber)
+				btstrategy == COMPARE_LT)
 			{
 				/* Successful mapping */
 				entry->sortopfamily[attn] = btopfamily;