From: Bruce Momjian <bruce@momjian.us>
Date: Fri, 7 Jun 2002 23:41:53 +0000 (+0000)
Subject: Fix for  factorial(0::int2) returning 1, from  sugita@sra.co.jp.
X-Git-Url: http://git.postgresql.org/gitweb/static/gitweb.js?a=commitdiff_plain;h=72d109d6e438271cd9b8258ed2a3695b3472ca7c;p=users%2Fbernd%2Fpostgres.git

Fix for  factorial(0::int2) returning 1, from  sugita@sra.co.jp.
---

diff --git a/src/backend/utils/adt/int.c b/src/backend/utils/adt/int.c
index 408677d41f..83dd162804 100644
--- a/src/backend/utils/adt/int.c
+++ b/src/backend/utils/adt/int.c
@@ -800,7 +800,9 @@ int2fac(PG_FUNCTION_ARGS)
 	int16		arg1 = PG_GETARG_INT16(0);
 	int32		result;
 
-	if (arg1 < 1)
+	if (arg1 == 0)
+		result = 1;
+	else if (arg1 < 1)
 		result = 0;
 	else
 		for (result = 1; arg1 > 0; --arg1)