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From:Roy Lyseng Date:June 27 2011 6:46am
Subject:bzr commit into mysql-trunk branch (roy.lyseng:3393) Bug#12603183
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#At file:///home/rl136806/mysql/repo/mysql-work3/ based on revid:guilhem.bichot@stripped

 3393 Roy Lyseng	2011-06-27
      Bug#12603183: Segfault in hp_movelink
      
        The bug manifests itself sometimes as a segmentation fault,
        sometimes as a Valgrind warning. Consistent faulting has been
        difficult to achieve.
      
        The problem is with the Materialization scan semi-join strategy.
        When materialization is done, the read_first_record function
        pointer is replaced with a function to read from the materialized
        table instead. This strategy works when the materialization is
        performed once per query, even when the materialized table is
        read multiple times. However, if the materialization is performed
        multiple times, such as when called from within another subquery,
        the original function pointer is never restored, and the wrong
        function is used to read from the subquery tables when materializing.
      
        The solution for the problem is to save the original function pointer
        in the save_read_first_record field of the join_tab and restore
        it for every new materialization.
      
        save_read_first_record is now used both from materialize-scan and
        from subqueries that toggle between ref access and full table scan.
        We could imagine a query that used both strategies at the same time:
      
        SELECT ... FROM ot...
        WHERE ocol NOT IN (SELECT ... FROM mt...
                                      WHERE mcol IN (SELECT ... FROM it ...))
      
        Where the inner-most subquery is transformed into a semi-join and
        materialize-scan strategy is selected, and the NOT IN alternates
        betwen a ref access and a full table scan on its inner table.
        However, the ref access would have to be against table "mt", but the
        table being materialized in this case is "it".
      
        Hence, I think this scenario is not possible.
      
        Notice that there are still some result differences, which would
        not be seen with the original "LIMIT 1" specification.
        It seems that Materialization scan is still slightly broken when
        used together with an outer join. This problem will be looked at
        in the context of WL#5561. Notice also that when semi-join
        transformation for outer joins is enabled, both subqueries of this
        query will be converted, and the materialization will be performed
        only once, avoiding the entire problem. Hence, to reproduce this
        problem in context of WL#5561, make sure that the outer subquery
        is not transformed.
      
        mysql-test/include/subquery_sj.inc
          Added test case for bug#12603183.
      
        mysql-test/r/subquery_sj_all.result
        mysql-test/r/subquery_sj_all_jcl6.result
        mysql-test/r/subquery_sj_all_jcl7.result
        mysql-test/r/subquery_sj_dupsweed.result
        mysql-test/r/subquery_sj_dupsweed_jcl6.result
        mysql-test/r/subquery_sj_dupsweed_jcl7.result
        mysql-test/r/subquery_sj_firstmatch.result
        mysql-test/r/subquery_sj_firstmatch_jcl6.result
        mysql-test/r/subquery_sj_firstmatch_jcl7.result
        mysql-test/r/subquery_sj_loosescan.result
        mysql-test/r/subquery_sj_loosescan_jcl6.result
        mysql-test/r/subquery_sj_loosescan_jcl7.result
        mysql-test/r/subquery_sj_mat.result
        mysql-test/r/subquery_sj_mat_jcl6.result
        mysql-test/r/subquery_sj_mat_jcl7.result
        mysql-test/r/subquery_sj_mat_nosj.result
        mysql-test/r/subquery_sj_none.result
        mysql-test/r/subquery_sj_none_jcl6.result
        mysql-test/r/subquery_sj_none_jcl7.result
          Updated with test results for bug#12603183.
      
      sql/sql_select.cc
        sub_select_sjm():
        Save read function pointer into save_read_first_record on first
        materialization, and restore it on subsequent materializations.
        Deleted a DBUG_ASSERT that seemed redundant, and moved setting
        of sjm->materialized to a better place.
      
      sql/sql_select.h
        Updated comment for join_tab field save_read_first_record.

    modified:
      mysql-test/include/subquery_sj.inc
      mysql-test/r/subquery_sj_all.result
      mysql-test/r/subquery_sj_all_jcl6.result
      mysql-test/r/subquery_sj_all_jcl7.result
      mysql-test/r/subquery_sj_dupsweed.result
      mysql-test/r/subquery_sj_dupsweed_jcl6.result
      mysql-test/r/subquery_sj_dupsweed_jcl7.result
      mysql-test/r/subquery_sj_firstmatch.result
      mysql-test/r/subquery_sj_firstmatch_jcl6.result
      mysql-test/r/subquery_sj_firstmatch_jcl7.result
      mysql-test/r/subquery_sj_loosescan.result
      mysql-test/r/subquery_sj_loosescan_jcl6.result
      mysql-test/r/subquery_sj_loosescan_jcl7.result
      mysql-test/r/subquery_sj_mat.result
      mysql-test/r/subquery_sj_mat_jcl6.result
      mysql-test/r/subquery_sj_mat_jcl7.result
      mysql-test/r/subquery_sj_mat_nosj.result
      mysql-test/r/subquery_sj_none.result
      mysql-test/r/subquery_sj_none_jcl6.result
      mysql-test/r/subquery_sj_none_jcl7.result
      sql/sql_select.cc
      sql/sql_select.h
=== modified file 'mysql-test/include/subquery_sj.inc'
--- a/mysql-test/include/subquery_sj.inc	2011-06-21 09:29:01 +0000
+++ b/mysql-test/include/subquery_sj.inc	2011-06-27 06:45:51 +0000
@@ -3748,3 +3748,58 @@ eval $query;
 DROP TABLE t1, t2;
 
 --echo # End of bug#12603200
+
+--echo #
+--echo # Bug#12603183: Segfault in hp_movelink
+--echo #
+
+CREATE TABLE t1 (
+  col_varchar_key varchar(1) ,
+  col_varchar_nokey varchar(1) ,
+  KEY col_varchar_key(col_varchar_key)
+);
+
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+
+CREATE TABLE t2 (
+  col_varchar_nokey varchar(1)
+);
+
+INSERT INTO t2 VALUES
+('b');
+
+let $query=
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+   (SELECT parent1.col_varchar_nokey
+    FROM t1 AS parent1
+    WHERE parent1.col_varchar_key IN
+       (SELECT child1.col_varchar_nokey AS c1
+        FROM t1 AS child1 LEFT JOIN t2 AS child2
+                ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+
+eval EXPLAIN $query;
+eval $query;
+
+--echo -- Notice that Materialize-scan algorithm reports wrong result for this query.
+--echo -- This problem will be filed as a separate bug and dealt with in WL#5561.
+
+DROP TABLE t1, t2;
+
+--echo # End of the test for bug#12603183.

=== modified file 'mysql-test/r/subquery_sj_all.result'
--- a/mysql-test/r/subquery_sj_all.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_all.result	2011-06-27 06:45:51 +0000
@@ -5644,4 +5644,76 @@ c	3
 c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
+#
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+2	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where; Start materialize; Scan
+2	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; End materialize
+2	DEPENDENT SUBQUERY	parent1	ref	col_varchar_key	col_varchar_key	4	test.child1.col_varchar_nokey	2	Using where
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
 set optimizer_switch=default;

=== modified file 'mysql-test/r/subquery_sj_all_jcl6.result'
--- a/mysql-test/r/subquery_sj_all_jcl6.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_all_jcl6.result	2011-06-27 06:45:51 +0000
@@ -5648,5 +5648,77 @@ c	3
 c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
+#
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+2	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where; Start materialize; Scan
+2	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; End materialize
+2	DEPENDENT SUBQUERY	parent1	ref	col_varchar_key	col_varchar_key	4	test.child1.col_varchar_nokey	2	Using where; Using join buffer (BKA, incremental buffers)
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
 set optimizer_switch=default;
 set optimizer_join_cache_level=default;

=== modified file 'mysql-test/r/subquery_sj_all_jcl7.result'
--- a/mysql-test/r/subquery_sj_all_jcl7.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_all_jcl7.result	2011-06-27 06:45:51 +0000
@@ -5648,5 +5648,77 @@ c	3
 c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
+#
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, regular buffers)
+2	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where; Start materialize; Scan
+2	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; End materialize
+2	DEPENDENT SUBQUERY	parent1	ref	col_varchar_key	col_varchar_key	4	test.child1.col_varchar_nokey	2	Using where; Using join buffer (BKA_UNIQUE, regular buffers)
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
 set optimizer_switch=default;
 set optimizer_join_cache_level=default;

=== modified file 'mysql-test/r/subquery_sj_dupsweed.result'
--- a/mysql-test/r/subquery_sj_dupsweed.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_dupsweed.result	2011-06-27 06:45:51 +0000
@@ -5643,4 +5643,77 @@ c	3
 c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
+#
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+2	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where; Start temporary
+2	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+2	DEPENDENT SUBQUERY	parent1	ref	col_varchar_key	col_varchar_key	4	test.child1.col_varchar_nokey	2	Using where; End temporary
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+a
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
 set optimizer_switch=default;

=== modified file 'mysql-test/r/subquery_sj_dupsweed_jcl6.result'
--- a/mysql-test/r/subquery_sj_dupsweed_jcl6.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_dupsweed_jcl6.result	2011-06-27 06:45:51 +0000
@@ -5647,5 +5647,78 @@ c	3
 c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
+#
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+2	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where; Start temporary
+2	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+2	DEPENDENT SUBQUERY	parent1	ref	col_varchar_key	col_varchar_key	4	test.child1.col_varchar_nokey	2	Using where; End temporary
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+a
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
 set optimizer_switch=default;
 set optimizer_join_cache_level=default;

=== modified file 'mysql-test/r/subquery_sj_dupsweed_jcl7.result'
--- a/mysql-test/r/subquery_sj_dupsweed_jcl7.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_dupsweed_jcl7.result	2011-06-27 06:45:51 +0000
@@ -5647,5 +5647,78 @@ c	3
 c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
+#
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, regular buffers)
+2	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where; Start temporary
+2	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, regular buffers)
+2	DEPENDENT SUBQUERY	parent1	ref	col_varchar_key	col_varchar_key	4	test.child1.col_varchar_nokey	2	Using where; End temporary
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+a
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
 set optimizer_switch=default;
 set optimizer_join_cache_level=default;

=== modified file 'mysql-test/r/subquery_sj_firstmatch.result'
--- a/mysql-test/r/subquery_sj_firstmatch.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_firstmatch.result	2011-06-27 06:45:51 +0000
@@ -5645,6 +5645,79 @@ c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
 #
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+2	DEPENDENT SUBQUERY	parent1	ALL	col_varchar_key	NULL	NULL	NULL	15	Using where
+2	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where
+2	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; FirstMatch(parent1)
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+a
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
+#
 # Bug#51457 Firstmatch semijoin strategy gives wrong results for
 #           certain query plans
 #

=== modified file 'mysql-test/r/subquery_sj_firstmatch_jcl6.result'
--- a/mysql-test/r/subquery_sj_firstmatch_jcl6.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_firstmatch_jcl6.result	2011-06-27 06:45:51 +0000
@@ -5649,6 +5649,79 @@ c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
 #
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+2	DEPENDENT SUBQUERY	parent1	ALL	col_varchar_key	NULL	NULL	NULL	15	Using where
+2	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where
+2	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; FirstMatch(parent1)
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+a
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
+#
 # Bug#51457 Firstmatch semijoin strategy gives wrong results for
 #           certain query plans
 #

=== modified file 'mysql-test/r/subquery_sj_firstmatch_jcl7.result'
--- a/mysql-test/r/subquery_sj_firstmatch_jcl7.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_firstmatch_jcl7.result	2011-06-27 06:45:51 +0000
@@ -5649,6 +5649,79 @@ c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
 #
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, regular buffers)
+2	DEPENDENT SUBQUERY	parent1	ALL	col_varchar_key	NULL	NULL	NULL	15	Using where
+2	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where
+2	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; FirstMatch(parent1)
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+a
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
+#
 # Bug#51457 Firstmatch semijoin strategy gives wrong results for
 #           certain query plans
 #

=== modified file 'mysql-test/r/subquery_sj_loosescan.result'
--- a/mysql-test/r/subquery_sj_loosescan.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_loosescan.result	2011-06-27 06:45:51 +0000
@@ -5644,4 +5644,77 @@ c	3
 c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
+#
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+2	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where; Start temporary
+2	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+2	DEPENDENT SUBQUERY	parent1	ref	col_varchar_key	col_varchar_key	4	test.child1.col_varchar_nokey	2	Using where; End temporary
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+a
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
 set optimizer_switch=default;

=== modified file 'mysql-test/r/subquery_sj_loosescan_jcl6.result'
--- a/mysql-test/r/subquery_sj_loosescan_jcl6.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_loosescan_jcl6.result	2011-06-27 06:45:51 +0000
@@ -5648,5 +5648,78 @@ c	3
 c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
+#
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+2	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where; Start temporary
+2	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+2	DEPENDENT SUBQUERY	parent1	ref	col_varchar_key	col_varchar_key	4	test.child1.col_varchar_nokey	2	Using where; End temporary
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+a
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
 set optimizer_switch=default;
 set optimizer_join_cache_level=default;

=== modified file 'mysql-test/r/subquery_sj_loosescan_jcl7.result'
--- a/mysql-test/r/subquery_sj_loosescan_jcl7.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_loosescan_jcl7.result	2011-06-27 06:45:51 +0000
@@ -5648,5 +5648,78 @@ c	3
 c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
+#
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, regular buffers)
+2	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where; Start temporary
+2	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, regular buffers)
+2	DEPENDENT SUBQUERY	parent1	ref	col_varchar_key	col_varchar_key	4	test.child1.col_varchar_nokey	2	Using where; End temporary
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+a
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
 set optimizer_switch=default;
 set optimizer_join_cache_level=default;

=== modified file 'mysql-test/r/subquery_sj_mat.result'
--- a/mysql-test/r/subquery_sj_mat.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_mat.result	2011-06-27 06:45:51 +0000
@@ -5644,4 +5644,76 @@ c	3
 c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
+#
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+2	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where; Start materialize; Scan
+2	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; End materialize
+2	DEPENDENT SUBQUERY	parent1	ref	col_varchar_key	col_varchar_key	4	test.child1.col_varchar_nokey	2	Using where
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
 set optimizer_switch=default;

=== modified file 'mysql-test/r/subquery_sj_mat_jcl6.result'
--- a/mysql-test/r/subquery_sj_mat_jcl6.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_mat_jcl6.result	2011-06-27 06:45:51 +0000
@@ -5648,5 +5648,77 @@ c	3
 c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
+#
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+2	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where; Start materialize; Scan
+2	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; End materialize
+2	DEPENDENT SUBQUERY	parent1	ref	col_varchar_key	col_varchar_key	4	test.child1.col_varchar_nokey	2	Using where
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
 set optimizer_switch=default;
 set optimizer_join_cache_level=default;

=== modified file 'mysql-test/r/subquery_sj_mat_jcl7.result'
--- a/mysql-test/r/subquery_sj_mat_jcl7.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_mat_jcl7.result	2011-06-27 06:45:51 +0000
@@ -5648,5 +5648,77 @@ c	3
 c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
+#
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, regular buffers)
+2	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where; Start materialize; Scan
+2	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; End materialize
+2	DEPENDENT SUBQUERY	parent1	ref	col_varchar_key	col_varchar_key	4	test.child1.col_varchar_nokey	2	Using where
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
 set optimizer_switch=default;
 set optimizer_join_cache_level=default;

=== modified file 'mysql-test/r/subquery_sj_mat_nosj.result'
--- a/mysql-test/r/subquery_sj_mat_nosj.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_mat_nosj.result	2011-06-27 06:45:51 +0000
@@ -5866,4 +5866,77 @@ c	3
 c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
+#
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+2	SUBQUERY	parent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+3	SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	
+3	SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+a
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
 set optimizer_switch=default;

=== modified file 'mysql-test/r/subquery_sj_none.result'
--- a/mysql-test/r/subquery_sj_none.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_none.result	2011-06-27 06:45:51 +0000
@@ -5789,4 +5789,77 @@ c	3
 c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
+#
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+2	DEPENDENT SUBQUERY	parent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+3	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where
+3	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+a
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
 set optimizer_switch=default;

=== modified file 'mysql-test/r/subquery_sj_none_jcl6.result'
--- a/mysql-test/r/subquery_sj_none_jcl6.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_none_jcl6.result	2011-06-27 06:45:51 +0000
@@ -5793,5 +5793,78 @@ c	3
 c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
+#
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+2	DEPENDENT SUBQUERY	parent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+3	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where
+3	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, incremental buffers)
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+a
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
 set optimizer_switch=default;
 set optimizer_join_cache_level=default;

=== modified file 'mysql-test/r/subquery_sj_none_jcl7.result'
--- a/mysql-test/r/subquery_sj_none_jcl7.result	2011-06-21 09:29:01 +0000
+++ b/mysql-test/r/subquery_sj_none_jcl7.result	2011-06-27 06:45:51 +0000
@@ -5793,5 +5793,78 @@ c	3
 c	13
 DROP TABLE t1, t2;
 # End of bug#12603200
+#
+# Bug#12603183: Segfault in hp_movelink
+#
+CREATE TABLE t1 (
+col_varchar_key varchar(1) ,
+col_varchar_nokey varchar(1) ,
+KEY col_varchar_key(col_varchar_key)
+);
+INSERT INTO t1 VALUES
+('i','i'),
+('h','h'),
+('q','q'),
+('a','a'),
+('v','v'),
+('u','u'),
+('s','s'),
+('y','y'),
+('z','z'),
+('h','h'),
+('p','p'),
+('e','e'),
+('i','i'),
+('y','y'),
+('w','w');
+CREATE TABLE t2 (
+col_varchar_nokey varchar(1)
+);
+INSERT INTO t2 VALUES
+('b');
+EXPLAIN SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	grandparent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+1	PRIMARY	grandparent2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, regular buffers)
+2	DEPENDENT SUBQUERY	parent1	ALL	NULL	NULL	NULL	NULL	15	Using where
+3	DEPENDENT SUBQUERY	child1	ALL	NULL	NULL	NULL	NULL	15	Using where
+3	DEPENDENT SUBQUERY	child2	ALL	NULL	NULL	NULL	NULL	1	Using where; Using join buffer (BNL, regular buffers)
+SELECT grandparent1.col_varchar_nokey
+FROM t1 AS grandparent1 LEFT JOIN t2 AS grandparent2 USING (col_varchar_nokey)
+WHERE (grandparent1.col_varchar_key) IN
+(SELECT parent1.col_varchar_nokey
+FROM t1 AS parent1
+WHERE parent1.col_varchar_key IN
+(SELECT child1.col_varchar_nokey AS c1
+FROM t1 AS child1 LEFT JOIN t2 AS child2
+ON (child1.col_varchar_key > child2.col_varchar_nokey)));
+col_varchar_nokey
+i
+h
+q
+a
+v
+u
+s
+y
+z
+h
+p
+e
+i
+y
+w
+-- Notice that Materialize-scan algorithm reports wrong result for this query.
+-- This problem will be filed as a separate bug and dealt with in WL#5561.
+DROP TABLE t1, t2;
+# End of the test for bug#12603183.
 set optimizer_switch=default;
 set optimizer_join_cache_level=default;

=== modified file 'sql/sql_select.cc'
--- a/sql/sql_select.cc	2011-06-24 13:09:12 +0000
+++ b/sql/sql_select.cc	2011-06-27 06:45:51 +0000
@@ -17366,6 +17366,20 @@ sub_select_sjm(JOIN *join, JOIN_TAB *joi
     Next_select_func next_func= join_tab[sjm->table_count - 1].next_select;
     join_tab[sjm->table_count - 1].next_select= end_sj_materialize;
 
+    if (sjm->is_scan)
+    {
+      JOIN_TAB *last_tab= join_tab + (sjm->table_count - 1);
+      if (last_tab->save_read_first_record == NULL)
+      {
+        /* Save a copy of the read first function before substituting it */
+        last_tab->save_read_first_record= last_tab->read_first_record;
+      }
+      else
+      {
+        /* Restore read function saved in previous materialization round */
+        last_tab->read_first_record= last_tab->save_read_first_record;
+      }
+    }
     /*
       Now run the join for the inner tables. The first call is to run the
       join, the second one is to signal EOF (this is essential for some
@@ -17382,7 +17396,6 @@ sub_select_sjm(JOIN *join, JOIN_TAB *joi
     /*
       Ok, materialization finished. Initialize the access to the temptable
     */
-    sjm->materialized= TRUE;
     join_tab->read_record.read_record= join_no_more_records;
     if (sjm->is_scan)
     {
@@ -17391,7 +17404,6 @@ sub_select_sjm(JOIN *join, JOIN_TAB *joi
       init_read_record(&last_tab->read_record, join->thd,
                        sjm->table, NULL, TRUE, TRUE, FALSE);
 
-      DBUG_ASSERT(last_tab->read_record.read_record == rr_sequential);
       last_tab->read_first_record= join_read_record_no_init;
       last_tab->read_record.copy_field= sjm->copy_field;
       last_tab->read_record.copy_field_end= sjm->copy_field +
@@ -17402,6 +17414,8 @@ sub_select_sjm(JOIN *join, JOIN_TAB *joi
       last_tab->last_inner= NULL;
       last_tab->first_unmatched= NULL;
     }
+
+    sjm->materialized= true;
   }
   else
   {

=== modified file 'sql/sql_select.h'
--- a/sql/sql_select.h	2011-06-24 13:22:37 +0000
+++ b/sql/sql_select.h	2011-06-27 06:45:51 +0000
@@ -308,9 +308,10 @@ public:
   Next_select_func next_select;
   READ_RECORD	read_record;
   /* 
-    Currently the following two fields are used only for a [NOT] IN subquery
-    if it is executed by an alternative full table scan when the left operand of
+    The following two fields are used for a [NOT] IN subquery if it is
+    executed by an alternative full table scan when the left operand of
     the subquery predicate is evaluated to NULL.
+    save_read_first_record is also used by semi-join materialization strategy.
   */  
   READ_RECORD::Setup_func save_read_first_record;/* to save read_first_record */
   READ_RECORD::Read_func save_read_record;/* to save read_record.read_record */


Attachment: [text/bzr-bundle] bzr/roy.lyseng@oracle.com-20110627064551-dhzsrv4q0tp1wfim.bundle
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bzr commit into mysql-trunk branch (roy.lyseng:3393) Bug#12603183Roy Lyseng27 Jun