From abbe05e681f7d54190a0902e96cd3917f6806b51 Mon Sep 17 00:00:00 2001
From: Tom Lane
Date: Sat, 24 Sep 2005 15:34:07 +0000
Subject: In a machine where INT64_IS_BUSTED, we can only support 32-bit values
 for int8 and related types.  However we might be talking to a client that has
 working int64; so pq_getmsgint64 really needs to check the incoming value and
 throw an overflow error if we can't represent it accurately.

---
 src/backend/libpq/pqformat.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/backend/libpq/pqformat.c b/src/backend/libpq/pqformat.c
index 9db0b2d927..fb9db13ef9 100644
--- a/src/backend/libpq/pqformat.c
+++ b/src/backend/libpq/pqformat.c
@@ -501,8 +501,12 @@ pq_getmsgint64(StringInfo msg)
 	l32 = ntohl(l32);
 
 #ifdef INT64_IS_BUSTED
-	/* just lose the high half */
+	/* error out if incoming value is wider than 32 bits */
 	result = l32;
+	if ((result < 0) ? (h32 != -1) : (h32 != 0))
+		ereport(ERROR,
+				(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
+				 errmsg("binary value is out of range for type bigint")));
 #else
 	result = h32;
 	result <<= 32;
-- 
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