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-rw-r--r--mysql-test/t/subselect.test10
1 files changed, 10 insertions, 0 deletions
diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test
index a9e09bb4e27..ab864803864 100644
--- a/mysql-test/t/subselect.test
+++ b/mysql-test/t/subselect.test
@@ -6011,3 +6011,13 @@ SELECT ( SELECT MIN(v2.f2) FROM t1 ) AS sq FROM v2 GROUP BY sq;
drop view v2;
drop table t1,t2;
+
+--echo #
+--echo # MDEV-10386 Assertion `fixed == 1' failed in virtual String* Item_func_conv_charset::val_str(String*)
+--echo #
+
+CREATE TABLE t1 (f1 CHAR(3) CHARACTER SET utf8 NULL, f2 CHAR(3) CHARACTER SET latin1 NULL);
+INSERT INTO t1 VALUES ('foo','bar');
+SELECT * FROM t1 WHERE f2 >= SOME ( SELECT f1 FROM t1 );
+SELECT * FROM t1 WHERE f2 <= SOME ( SELECT f1 FROM t1 );
+DROP TABLE t1;