From e1cbca185139eed0ba3cf47807967b25f5a76ea1 Mon Sep 17 00:00:00 2001
From: Alexander Barkov <bar@mariadb.org>
Date: Thu, 1 Oct 2015 14:21:12 +0400
Subject: [PATCH] MDEV-657 LP:873142 - GREATEST() does not always return same
 signness of argument types. The patch for MDEV-8871 also fixed the problem
 reported in MDEV-657. Adding the test case from the bug report.

---
 mysql-test/r/func_hybrid_type.result | 10 ++++++++++
 mysql-test/t/func_hybrid_type.test   |  9 +++++++++
 2 files changed, 19 insertions(+)

diff --git a/mysql-test/r/func_hybrid_type.result b/mysql-test/r/func_hybrid_type.result
index a8cd4ca4429..2412dd9978f 100644
--- a/mysql-test/r/func_hybrid_type.result
+++ b/mysql-test/r/func_hybrid_type.result
@@ -2307,5 +2307,15 @@ t1	CREATE TABLE `t1` (
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 DROP TABLE t1;
 #
+# MDEV-657 LP:873142 - GREATEST() does not always return same signness of argument types
+#
+CREATE TABLE t1 (a BIGINT(20) UNSIGNED NOT NULL PRIMARY KEY);
+INSERT INTO t1 (a) VALUES (13836376518955650385) ON DUPLICATE KEY UPDATE a=GREATEST(a,VALUES(a));
+INSERT INTO t1 (a) VALUES (13836376518955650385) ON DUPLICATE KEY UPDATE a=GREATEST(a,VALUES(a));
+SELECT * FROM t1;
+a
+13836376518955650385
+DROP TABLE t1;
+#
 # End of 10.1 tests
 #
diff --git a/mysql-test/t/func_hybrid_type.test b/mysql-test/t/func_hybrid_type.test
index 5cd0c6ecade..f64b87ea3f8 100644
--- a/mysql-test/t/func_hybrid_type.test
+++ b/mysql-test/t/func_hybrid_type.test
@@ -102,6 +102,15 @@ CREATE TABLE t1 AS SELECT LEAST(1.0,'10');
 SHOW CREATE TABLE t1;
 DROP TABLE t1;
 
+--echo #
+--echo # MDEV-657 LP:873142 - GREATEST() does not always return same signness of argument types
+--echo #
+CREATE TABLE t1 (a BIGINT(20) UNSIGNED NOT NULL PRIMARY KEY);
+INSERT INTO t1 (a) VALUES (13836376518955650385) ON DUPLICATE KEY UPDATE a=GREATEST(a,VALUES(a));
+INSERT INTO t1 (a) VALUES (13836376518955650385) ON DUPLICATE KEY UPDATE a=GREATEST(a,VALUES(a));
+SELECT * FROM t1;
+DROP TABLE t1;
+
 --echo #
 --echo # End of 10.1 tests
 --echo #