From: Peter Eisentraut <peter_e@gmx.net>
Date: Sun, 17 Jul 2016 13:37:33 +0000 (-0400)
Subject: Use correct symbol for minimum int64 value
X-Git-Tag: REL9_2_18~35
X-Git-Url: http://git.postgresql.org/gitweb/?a=commitdiff_plain;h=6c0be49b2ab7a673656d385ba09fc0c1657c6e33;p=postgresql.git

Use correct symbol for minimum int64 value

The old code used SEQ_MINVALUE to get the smallest int64 value.  This
was done as a convenience to avoid having to deal with INT64_IS_BUSTED,
but that is obsolete now.  Also, it is incorrect because the smallest
int64 value is actually SEQ_MINVALUE-1.  Fix by writing out the constant
the long way, as it is done elsewhere in the code.
---

diff --git a/contrib/btree_gin/btree_gin.c b/contrib/btree_gin/btree_gin.c
index 5e6003f63cb..1cff0e3d386 100644
--- a/contrib/btree_gin/btree_gin.c
+++ b/contrib/btree_gin/btree_gin.c
@@ -213,10 +213,7 @@ GIN_SUPPORT(int4)
 static Datum
 leftmostvalue_int8(void)
 {
-	/*
-	 * Use sequence's definition to keep compatibility.
-	 */
-	return Int64GetDatum(SEQ_MINVALUE);
+	return Int64GetDatum(-INT64CONST(0x7FFFFFFFFFFFFFFF) - 1);
 }
 static TypeInfo TypeInfo_int8 = {false, leftmostvalue_int8, btint8cmp};
 
@@ -243,10 +240,7 @@ GIN_SUPPORT(float8)
 static Datum
 leftmostvalue_money(void)
 {
-	/*
-	 * Use sequence's definition to keep compatibility.
-	 */
-	return Int64GetDatum(SEQ_MINVALUE);
+	return Int64GetDatum(-INT64CONST(0x7FFFFFFFFFFFFFFF) - 1);
 }
 static TypeInfo TypeInfo_money = {false, leftmostvalue_money, cash_cmp};