1 files changed, 26 insertions, 0 deletions
diff --git a/mysql-test/t/trigger.test b/mysql-test/t/trigger.test
index a01efba11db..82de4dac111 100644
--- a/mysql-test/t/trigger.test
+++ b/mysql-test/t/trigger.test
@@ -1737,4 +1737,30 @@ DROP TRIGGER trg27006_a_insert;
 DROP TRIGGER trg27006_a_update;
 drop table t1,t2;
 
+#
+# Bug #20903 "Crash when using CREATE TABLE .. SELECT and triggers"
+#
+
+--disable_warnings
+drop table if exists t1, t2, t3;
+--enable_warnings
+create table t1 (i int);
+create trigger t1_bi before insert on t1 for each row set new.i = 7;
+create trigger t1_ai after insert on t1 for each row set @a := 7;
+create table t2 (j int);
+insert into t2 values (1), (2);
+set @a:="";
+create table if not exists t1 select * from t2;
+select * from t1;
+select @a;
+# Let us check that trigger that involves table also works ok.
+drop trigger t1_bi;
+drop trigger t1_ai;
+create table t3 (isave int);
+create trigger t1_bi before insert on t1 for each row insert into t3 values (new.i);
+create table if not exists t1 select * from t2;
+select * from t1;
+select * from t3;
+drop table t1, t2, t3;
+
 --echo End of 5.0 tests