Merge ibabaev@bk-internal.mysql.com:/home/bk/mysql-5.0

into igor-inspiron.creware.com:/home/igor/mysql-5.0

2 files changed, 36 insertions, 0 deletions

diff --git a/mysql-test/r/case.result b/mysql-test/r/case.result
index 5fb21004469..a854cf4c7b0 100644
--- a/mysql-test/r/case.result
+++ b/mysql-test/r/case.result
@@ -160,3 +160,20 @@ t1	CREATE TABLE `t1` (
   `COALESCE('a' COLLATE latin1_bin,'b')` varchar(1) character set latin1 collate latin1_bin NOT NULL default ''
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1
 DROP TABLE t1;
+CREATE TABLE t1 (EMPNUM INT);
+INSERT INTO t1 VALUES (0), (2);
+CREATE TABLE t2 (EMPNUM DECIMAL (4, 2));
+INSERT INTO t2 VALUES (0.0), (9.0);
+SELECT COALESCE(t2.EMPNUM,t1.EMPNUM) AS CEMPNUM,
+t1.EMPNUM AS EMPMUM1, t2.EMPNUM AS EMPNUM2
+FROM t1 LEFT JOIN t2 ON t1.EMPNUM=t2.EMPNUM;
+CEMPNUM	EMPMUM1	EMPNUM2
+0.00	0	0.00
+2.00	2	NULL
+SELECT IFNULL(t2.EMPNUM,t1.EMPNUM) AS CEMPNUM,
+t1.EMPNUM AS EMPMUM1, t2.EMPNUM AS EMPNUM2
+FROM t1 LEFT JOIN t2 ON t1.EMPNUM=t2.EMPNUM;
+CEMPNUM	EMPMUM1	EMPNUM2
+0.00	0	0.00
+2.00	2	NULL
+DROP TABLE t1,t2;
diff --git a/mysql-test/t/case.test b/mysql-test/t/case.test
index fed3ff07a13..f2cfce9085d 100644
--- a/mysql-test/t/case.test
+++ b/mysql-test/t/case.test
@@ -110,3 +110,22 @@ explain extended SELECT
  COALESCE('a' COLLATE latin1_bin,'b');
 SHOW CREATE TABLE t1;
 DROP TABLE t1;
+
+#
+# Tests for bug #9939: conversion of the arguments for COALESCE and IFNULL
+#
+
+CREATE TABLE t1 (EMPNUM INT);
+INSERT INTO t1 VALUES (0), (2);
+CREATE TABLE t2 (EMPNUM DECIMAL (4, 2));
+INSERT INTO t2 VALUES (0.0), (9.0);
+
+SELECT COALESCE(t2.EMPNUM,t1.EMPNUM) AS CEMPNUM,
+               t1.EMPNUM AS EMPMUM1, t2.EMPNUM AS EMPNUM2
+  FROM t1 LEFT JOIN t2 ON t1.EMPNUM=t2.EMPNUM;
+
+SELECT IFNULL(t2.EMPNUM,t1.EMPNUM) AS CEMPNUM,
+               t1.EMPNUM AS EMPMUM1, t2.EMPNUM AS EMPNUM2
+  FROM t1 LEFT JOIN t2 ON t1.EMPNUM=t2.EMPNUM;
+
+DROP TABLE t1,t2;