MDEV-16903 Assertion `!auto_increment_field_not_null' failed in TABLE::init after unsuccessful attempt to add CHECK constraint on temporary table

if the CHECK constraint failed in copy_data_between_tables(),
the loop was aborted prematurely and to->auto_increment_field_not_null
wasn't reset.

1 files changed, 12 insertions, 0 deletions

diff --git a/mysql-test/t/check.test b/mysql-test/t/check.test
index cce8fd34c9c..475a7996a09 100644
--- a/mysql-test/t/check.test
+++ b/mysql-test/t/check.test
@@ -103,3 +103,15 @@ CREATE OR REPLACE TABLE t1 (a INT, b INT, c INT, CHECK (a+b>0)) ENGINE=MyISAM;
 ALTER TABLE t1 DROP COLUMN b, DROP CONSTRAINT `CONSTRAINT_1`;
 SHOW CREATE TABLE t1;
 DROP TABLE t1;
+
+#
+# MDEV-16903 Assertion `!auto_increment_field_not_null' failed in TABLE::init after unsuccessful attempt to add CHECK constraint on temporary table
+#
+create temporary table t1 (
+  id int not null auto_increment primary key,
+  f int not null default 0
+);
+insert into t1 () values ();
+alter ignore table t1 add constraint check (f > 0);
+alter table t1;
+drop table t1;