From 4b49cbfbd444c5df166258868d10dbaa64a60d81 Mon Sep 17 00:00:00 2001
From: unknown <igor@rurik.mysql.com>
Date: Mon, 15 Aug 2005 21:33:58 -0700
Subject: [PATCH] sql_select.cc:   Fixed bug #11479.   The JOIN::reinit method
 cannot call setup_tables   after the optimization phase since this function  
 removes some optimization settings for joined   tables. E.g. it resets values
 of the null_row flag to 0. subselect.result, subselect.test:   Added a test
 case for bug #11479.

mysql-test/t/subselect.test:
  Added a test case for bug #11479.
mysql-test/r/subselect.result:
  Added a test case for bug #11479.
sql/sql_select.cc:
  Fixed bug #11479.
  The JOIN::reinit method cannot call setup_tables
  after the optimization phase since this function
  removes some optimization settings for joined
  tables. E.g. it resets values of the null_row flag to 0.
---
 mysql-test/r/subselect.result | 16 ++++++++++++++++
 mysql-test/t/subselect.test   | 16 ++++++++++++++++
 sql/sql_select.cc             |  2 +-
 3 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/mysql-test/r/subselect.result b/mysql-test/r/subselect.result
index 8a2ae8e171a..673466245ee 100644
--- a/mysql-test/r/subselect.result
+++ b/mysql-test/r/subselect.result
@@ -2817,3 +2817,19 @@ SELECT * FROM t1 WHERE (a,b) IN (('aaa','aaa'), ('aaa','bbb'));
 a	b
 aaa	aaa
 DROP TABLE t1;
+CREATE TABLE t1 (a int);
+CREATE TABLE t2 (a int, b int);
+CREATE TABLE t3 (b int NOT NULL);
+INSERT INTO t1 VALUES (1), (2), (3), (4);
+INSERT INTO t2 VALUES (1,10), (3,30);
+SELECT * FROM t2 LEFT JOIN t3 ON t2.b=t3.b
+WHERE t3.b IS NOT NULL OR t2.a > 10;
+a	b	b
+SELECT * FROM t1
+WHERE t1.a NOT IN (SELECT a FROM t2 LEFT JOIN t3 ON t2.b=t3.b
+WHERE t3.b IS NOT NULL OR t2.a > 10);
+a
+1
+2
+3
+4
diff --git a/mysql-test/t/subselect.test b/mysql-test/t/subselect.test
index 4bb917ab58c..7e3aa31217b 100644
--- a/mysql-test/t/subselect.test
+++ b/mysql-test/t/subselect.test
@@ -1796,4 +1796,20 @@ SELECT * FROM t1 WHERE (a,b) IN (('aaa','aaa'), ('aaa','bbb'));
 
 DROP TABLE t1;
 
+#
+# Bug #11479: subquery over left join with an empty inner table 
+#
+
+CREATE TABLE t1 (a int);
+CREATE TABLE t2 (a int, b int);
+CREATE TABLE t3 (b int NOT NULL);
+INSERT INTO t1 VALUES (1), (2), (3), (4);
+INSERT INTO t2 VALUES (1,10), (3,30);
+
+SELECT * FROM t2 LEFT JOIN t3 ON t2.b=t3.b
+  WHERE t3.b IS NOT NULL OR t2.a > 10;
+SELECT * FROM t1
+  WHERE t1.a NOT IN (SELECT a FROM t2 LEFT JOIN t3 ON t2.b=t3.b
+                       WHERE t3.b IS NOT NULL OR t2.a > 10);
+
 # End of 4.1 tests
diff --git a/sql/sql_select.cc b/sql/sql_select.cc
index a7984b525d1..9984cb4138f 100644
--- a/sql/sql_select.cc
+++ b/sql/sql_select.cc
@@ -984,7 +984,7 @@ JOIN::reinit()
   if (unit->select_limit_cnt == HA_POS_ERROR)
     select_lex->options&= ~OPTION_FOUND_ROWS;
   
-  if (setup_tables(tables_list))
+  if (!optimized && setup_tables(tables_list))
     DBUG_RETURN(1);
   
   /* Reset of sum functions */