From ae0c6a949c78139d1d8965cb8caa811f83cb8a94 Mon Sep 17 00:00:00 2001
From: "Tatiana A. Nurnberg" <azundris@mysql.com>
Date: Wed, 26 Nov 2008 09:28:17 +0100
Subject: Bug#37553: MySql Error Compare TimeDiff & Time

We pretended that TIMEDIFF() would always return positive results;
this gave strange results in comparisons of the TIMEDIFF(low,hi)<TIME(0)
type that rendered a negative result, but still gave false in comparison.
We also inadvertantly dropped the sign when converting times to
decimal.

CAST(time AS DECIMAL) handles signs of the times correctly.
TIMEDIFF() marked up as signed. Time/date comparison code switched to
signed for clarity.
---
 mysql-test/r/func_sapdb.result | 12 ++++++++++++
 mysql-test/t/func_sapdb.test   | 17 +++++++++++++++++
 2 files changed, 29 insertions(+)

(limited to 'mysql-test')

diff --git a/mysql-test/r/func_sapdb.result b/mysql-test/r/func_sapdb.result
index 4db0416bdce..a06d7004908 100644
--- a/mysql-test/r/func_sapdb.result
+++ b/mysql-test/r/func_sapdb.result
@@ -256,3 +256,15 @@ a
 select str_to_date("2003-01-02 10:11:12.0012", "%Y-%m-%d %H:%i:%S.%f");
 str_to_date("2003-01-02 10:11:12.0012", "%Y-%m-%d %H:%i:%S.%f")
 2003-01-02 10:11:12.001200
+select timediff('2008-09-29 20:10:10','2008-09-30 20:10:10'),time('00:00:00');
+timediff('2008-09-29 20:10:10','2008-09-30 20:10:10')	time('00:00:00')
+-24:00:00	00:00:00
+select timediff('2008-09-29 20:10:10','2008-09-30 20:10:10')>time('00:00:00');
+timediff('2008-09-29 20:10:10','2008-09-30 20:10:10')>time('00:00:00')
+0
+select timediff('2008-09-29 20:10:10','2008-09-30 20:10:10')<time('00:00:00');
+timediff('2008-09-29 20:10:10','2008-09-30 20:10:10')<time('00:00:00')
+1
+SELECT CAST(time('-73:42:12') AS DECIMAL);
+CAST(time('-73:42:12') AS DECIMAL)
+-734212
diff --git a/mysql-test/t/func_sapdb.test b/mysql-test/t/func_sapdb.test
index 5db6db70e8f..f37ee0c39f0 100644
--- a/mysql-test/t/func_sapdb.test
+++ b/mysql-test/t/func_sapdb.test
@@ -135,3 +135,20 @@ select str_to_date("2003-01-02 10:11:12.0012", "%Y-%m-%d %H:%i:%S.%f");
 --enable_ps_protocol
 
 # End of 4.1 tests
+
+
+
+#
+# Bug#37553: MySql Error Compare TimeDiff & Time
+#
+
+# calculations involving negative time values ignored sign
+select timediff('2008-09-29 20:10:10','2008-09-30 20:10:10'),time('00:00:00');
+select timediff('2008-09-29 20:10:10','2008-09-30 20:10:10')>time('00:00:00');
+select timediff('2008-09-29 20:10:10','2008-09-30 20:10:10')<time('00:00:00');
+
+# show that conversion to DECIMAL no longer drops sign
+SELECT CAST(time('-73:42:12') AS DECIMAL);
+
+
+# End of 5.0 tests
-- 
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