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-rw-r--r--mysql-test/t/func_gconcat.test12
1 files changed, 12 insertions, 0 deletions
diff --git a/mysql-test/t/func_gconcat.test b/mysql-test/t/func_gconcat.test
index cfb4cdc9ecd..e832ea316eb 100644
--- a/mysql-test/t/func_gconcat.test
+++ b/mysql-test/t/func_gconcat.test
@@ -708,4 +708,16 @@ SELECT 1 FROM
DROP TABLE t1;
+
+--echo #
+--echo # Bug #52397: another crash with explain extended and group_concat
+--echo #
+CREATE TABLE t1 (a INT);
+INSERT INTO t1 VALUES (0), (0);
+EXPLAIN EXTENDED SELECT 1 FROM
+ (SELECT GROUP_CONCAT(t1.a ORDER BY t1.a ASC) FROM
+ t1 t2, t1 GROUP BY t1.a) AS d;
+DROP TABLE t1;
+
+
--echo End of 5.0 tests