From a86eaaf5c3a2ca18415e9c16b56fc47683746d83 Mon Sep 17 00:00:00 2001
From: "konstantin@mysql.com" <>
Date: Fri, 18 Nov 2005 23:46:04 +0300
Subject: [PATCH] A test case for Bug#8568 "GROUP_CONCAT returns string, unless
 in a UNION in which case returns BLOB". The bug is not present anymore.

---
 mysql-test/r/func_gconcat.result | 15 +++++++++++++++
 mysql-test/t/func_gconcat.test   | 16 ++++++++++++++++
 2 files changed, 31 insertions(+)

diff --git a/mysql-test/r/func_gconcat.result b/mysql-test/r/func_gconcat.result
index 90884dcc596..7987ceca712 100644
--- a/mysql-test/r/func_gconcat.result
+++ b/mysql-test/r/func_gconcat.result
@@ -596,3 +596,18 @@ GROUP_CONCAT(a ORDER BY a)
 ,x
 ,z
 DROP TABLE t1;
+set names latin1;
+create table t1 (a char, b char);
+insert into t1 values ('a', 'a'), ('a', 'b'), ('b', 'a'), ('b', 'b');
+create table t2 select group_concat(b) as a from t1 where a = 'a';
+create table t3 (select group_concat(a) as a from t1 where a = 'a') union
+(select group_concat(b) as a from t1 where a = 'b');
+select charset(a) from t2;
+charset(a)
+latin1
+select charset(a) from t3;
+charset(a)
+latin1
+latin1
+drop table t1, t2, t3;
+set names default;
diff --git a/mysql-test/t/func_gconcat.test b/mysql-test/t/func_gconcat.test
index a519d51e0b5..cd686585dd8 100644
--- a/mysql-test/t/func_gconcat.test
+++ b/mysql-test/t/func_gconcat.test
@@ -390,3 +390,19 @@ SELECT GROUP_CONCAT(a ORDER BY a) FROM t1 GROUP BY id;
 DROP TABLE t1;
 
 # End of 4.1 tests
+
+#
+# Bug#8568 "GROUP_CONCAT returns string, unless in a UNION in which case
+# returns BLOB": add a test case, the bug can not be repeated any more.
+#
+
+set names latin1;
+create table t1 (a char, b char);
+insert into t1 values ('a', 'a'), ('a', 'b'), ('b', 'a'), ('b', 'b');
+create table t2 select group_concat(b) as a from t1 where a = 'a';
+create table t3 (select group_concat(a) as a from t1 where a = 'a') union
+                (select group_concat(b) as a from t1 where a = 'b');
+select charset(a) from t2;
+select charset(a) from t3;
+drop table t1, t2, t3;
+set names default;