Merge macbook.gmz:/Users/kgeorge/mysql/work/B21174-5.0-opt

into  macbook.gmz:/Users/kgeorge/mysql/work/B21174-5.1-opt


mysql-test/r/ctype_ucs.result:
  Auto merged
mysql-test/r/func_gconcat.result:
  Auto merged
mysql-test/r/func_group.result:
  Auto merged
mysql-test/r/group_by.result:
  Auto merged
mysql-test/r/subselect.result:
  Auto merged
mysql-test/r/view.result:
  Auto merged
mysql-test/t/ctype_ucs.test:
  Auto merged
mysql-test/t/func_gconcat.test:
  Auto merged
mysql-test/t/ps.test:
  Auto merged
mysql-test/t/view.test:
  Auto merged
sql/field.h:
  Auto merged
sql/filesort.cc:
  Auto merged
sql/item.cc:
  Auto merged
sql/item_sum.cc:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/sql_lex.cc:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
storage/myisam/mi_check.c:
  Auto merged
mysql-test/r/ps.result:
  merge 5.0-opt -> 5.1-opt
sql/unireg.cc:
  merge 5.0-opt -> 5.1-opt

1 files changed, 15 insertions, 0 deletions

diff --git a/mysql-test/t/func_gconcat.test b/mysql-test/t/func_gconcat.test
index 7a0d90961e4..19753430dde 100644
--- a/mysql-test/t/func_gconcat.test
+++ b/mysql-test/t/func_gconcat.test
@@ -447,3 +447,18 @@ SELECT a, CHAR_LENGTH(b) FROM t1;
 SELECT CHAR_LENGTH( GROUP_CONCAT(b) ) FROM t1;
 SET GROUP_CONCAT_MAX_LEN = 1024;
 DROP TABLE t1;
+
+#
+# Bug #22015: crash with GROUP_CONCAT over a derived table that 
+#             returns the results of aggregation by GROUP_CONCAT  
+#
+
+CREATE TABLE t1 (a int, b int);
+
+INSERT INTO t1 VALUES (2,1), (1,2), (2,2), (1,3);
+
+SELECT GROUP_CONCAT(a), x 
+  FROM (SELECT a, GROUP_CONCAT(b) x FROM t1 GROUP BY a) AS s
+    GROUP BY x;
+
+DROP TABLE t1;