From 4bf5c7c55b2033d3e8b218472550c35e2cda07f3 Mon Sep 17 00:00:00 2001
From: unknown <timour@mysql.com>
Date: Tue, 23 Aug 2005 20:24:29 +0300
Subject: [PATCH] Test for BUG#4889 - inconsistent resilts of more than 2-way
 natural join due to incorrect transformation to JOIN ... ON.

The bug itself is fixed by WL#2486.


mysql-test/r/select.result:
  Test for BUG#4889.
mysql-test/t/select.test:
  Test for BUG#4889.
---
 mysql-test/r/select.result | 15 +++++++++++++++
 mysql-test/t/select.test   | 17 +++++++++++++++++
 2 files changed, 32 insertions(+)

diff --git a/mysql-test/r/select.result b/mysql-test/r/select.result
index 8d52dcc22fe..47dbdd49db9 100644
--- a/mysql-test/r/select.result
+++ b/mysql-test/r/select.result
@@ -2860,3 +2860,18 @@ a2	c
 2	2
 drop table t1, t2;
 drop view v2;
+create table t1 (a int(10), t1_val int(10));
+create table t2 (b int(10), t2_val int(10));
+create table t3 (a int(10), b int(10));
+insert into t1 values (1,1),(2,2);
+insert into t2 values (1,1),(2,2),(3,3);
+insert into t3 values (1,1),(2,1),(3,1),(4,1);
+select * from t1 natural join t2 natural join t3;
+a	b	t1_val	t2_val
+1	1	1	1
+2	1	2	1
+select * from t1 natural join t3 natural join t2;
+b	a	t1_val	t2_val
+1	1	1	1
+1	2	2	1
+drop table t1, t2, t3;
diff --git a/mysql-test/t/select.test b/mysql-test/t/select.test
index 414af3f9131..21fc4c25e61 100644
--- a/mysql-test/t/select.test
+++ b/mysql-test/t/select.test
@@ -2426,3 +2426,20 @@ select * from v2 natural right join t2;
 
 drop table t1, t2;
 drop view v2;
+
+
+#
+# Bug #4789 Incosistent results of more than 2-way natural joins due to
+#           incorrect transformation to join ... on.
+#
+
+create table t1 (a int(10), t1_val int(10));
+create table t2 (b int(10), t2_val int(10));
+create table t3 (a int(10), b int(10));
+insert into t1 values (1,1),(2,2);
+insert into t2 values (1,1),(2,2),(3,3);
+insert into t3 values (1,1),(2,1),(3,1),(4,1);
+# the following two queries must return the same result
+select * from t1 natural join t2 natural join t3;
+select * from t1 natural join t3 natural join t2;
+drop table t1, t2, t3;