1 files changed, 34 insertions, 0 deletions
diff --git a/mysql-test/include/mix1.inc b/mysql-test/include/mix1.inc
index e2a22303d9d..aee5613ff35 100644
--- a/mysql-test/include/mix1.inc
+++ b/mysql-test/include/mix1.inc
@@ -1146,4 +1146,38 @@ select @b:=f2 from t1;
 select if(@a=@b,"ok","wrong");
 drop table t1;
 
+#
+# Bug#30747 Create table with identical constraint names behaves incorrectly
+#
+
+if ($test_foreign_keys)
+{
+  CREATE TABLE t1 (a INT NOT NULL, b INT NOT NULL, PRIMARY KEY (a,b)) engine=innodb;
+  --error ER_WRONG_FK_DEF
+  CREATE TABLE t2 (c INT NOT NULL, d INT NOT NULL, PRIMARY KEY (c,d),
+                  CONSTRAINT c2 FOREIGN KEY f2 (c) REFERENCES t1 (a,b) ON UPDATE NO ACTION) engine=innodb;
+  --error ER_WRONG_FK_DEF
+  CREATE TABLE t2 (c INT NOT NULL, d INT NOT NULL, PRIMARY KEY (c,d),
+                  CONSTRAINT c2 FOREIGN KEY (c) REFERENCES t1 (a,b) ON UPDATE NO ACTION) engine=innodb;
+  CREATE TABLE t2 (c INT NOT NULL, d INT NOT NULL, PRIMARY KEY (c,d),
+                  CONSTRAINT c1 FOREIGN KEY c2 (c) REFERENCES t1 (a) ON DELETE NO ACTION,
+                  CONSTRAINT c2 FOREIGN KEY (c) REFERENCES t1 (a) ON UPDATE NO ACTION) engine=innodb;
+  ALTER TABLE t2 DROP FOREIGN KEY c2;
+  DROP TABLE t2;
+  --error ER_WRONG_FK_DEF
+  CREATE TABLE t2 (c INT NOT NULL, d INT NOT NULL, PRIMARY KEY (c,d),
+                  FOREIGN KEY (c) REFERENCES t1 (a,k) ON UPDATE NO ACTION) engine=innodb;
+  --error ER_WRONG_FK_DEF
+  CREATE TABLE t2 (c INT NOT NULL, d INT NOT NULL, PRIMARY KEY (c,d),
+                  FOREIGN KEY f1 (c) REFERENCES t1 (a,k) ON UPDATE NO ACTION) engine=innodb;
+  CREATE TABLE t2 (c INT NOT NULL, d INT NOT NULL, PRIMARY KEY (c,d),
+                  CONSTRAINT c1 FOREIGN KEY f1 (c) REFERENCES t1 (a) ON DELETE NO ACTION,
+                  CONSTRAINT c2 FOREIGN KEY (c) REFERENCES t1 (a) ON UPDATE NO ACTION,
+                  FOREIGN KEY f3 (c) REFERENCES t1 (a) ON UPDATE NO ACTION,
+                  FOREIGN KEY (c) REFERENCES t1 (a) ON UPDATE NO ACTION) engine=innodb;
+  SHOW CREATE TABLE t2;
+  DROP TABLE t2;
+  DROP TABLE t1;
+}
+
 --echo End of 5.1 tests