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-rw-r--r--mysql-test/main/type_bit.test23
1 files changed, 23 insertions, 0 deletions
diff --git a/mysql-test/main/type_bit.test b/mysql-test/main/type_bit.test
index f7b2ec86040..3085d46bab6 100644
--- a/mysql-test/main/type_bit.test
+++ b/mysql-test/main/type_bit.test
@@ -511,3 +511,26 @@ DROP TABLE t1;
--echo #
--echo # End of 10.4 tests
--echo #
+
+--echo #
+--echo # Start of 10.5 tests
+--echo #
+
+--echo #
+--echo # MDEV-20496 Assertion `field.is_sane()' failed in Protocol_text::store_field_metadata
+--echo #
+
+CREATE TABLE t1 (b BIT(1));
+--disable_ps_protocol
+--enable_metadata
+SELECT MIN(CASE WHEN 0 THEN b END) FROM t1;
+--disable_metadata
+--enable_ps_protocol
+CREATE TABLE t2 AS SELECT MIN(CASE WHEN 0 THEN b END) FROM t1;
+SHOW CREATE TABLE t2;
+DROP TABLE t2;
+DROP TABLE t1;
+
+--echo #
+--echo # End of 10.5 tests
+--echo #