Bug#11766300 59387: FAILING ASSERTION: CURSOR->POS_STATE == 1997660512 (BTR_PCUR_IS_POSITIONE

Bug#13639204 64111: CRASH ON SELECT SUBQUERY WITH NON UNIQUE INDEX
The crash happened due to wrong calculation
of key length during creation of reference for
sort order index. The problem is that
keyuse->used_tables can have OUTER_REF_TABLE_BIT enabled
but used_tables parameter(create_ref_for_key() func) does
not have it. So key parts which have OUTER_REF_TABLE_BIT
are ommited and it could lead to incorrect key length
calculation(zero key length).

mysql-test/r/subselect_innodb.result

@@ -245,3 +245,63 @@ x
 NULL
 drop procedure p1;
 drop tables t1,t2,t3;
+#
+# Bug #11766300  59387: FAILING ASSERTION: CURSOR->POS_STATE == 1997660512 (BTR_PCUR_IS_POSITIONE
+#
+CREATE TABLE t1 (a INT) ENGINE=INNODB;
+INSERT INTO t1 VALUES (0);
+CREATE TABLE t2 (d BINARY(2), PRIMARY KEY (d(1)), UNIQUE KEY (d)) ENGINE=INNODB;
+SELECT 1 FROM t1 WHERE NOT EXISTS
+(SELECT 1 FROM t2 WHERE d = (SELECT d FROM t2 WHERE a >= 1) ORDER BY d);
+1
+1
+EXPLAIN SELECT 1 FROM t1 WHERE NOT EXISTS
+(SELECT 1 FROM t2 WHERE d = (SELECT d FROM t2 WHERE a >= 1) ORDER BY d);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	1	Using where
+2	DEPENDENT SUBQUERY	t2	eq_ref	PRIMARY,d	d	2	func	1	Using where
+3	DEPENDENT SUBQUERY	t2	index	NULL	d	2	NULL	1	Using where; Using index
+DROP TABLE t2;
+CREATE TABLE t2 (b INT, c INT, UNIQUE KEY (b), UNIQUE KEY (b, c )) ENGINE=INNODB;
+INSERT INTO t2 VALUES (1, 1);
+SELECT 1 FROM t1
+WHERE a != (SELECT 1 FROM t2 WHERE a <=> b OR a > '' AND 6 = 7 ORDER BY b, c);
+1
+DROP TABLE t1, t2;
+#
+# Bug #13639204 64111: CRASH ON SELECT SUBQUERY WITH NON UNIQUE
+# INDEX
+#
+CREATE TABLE t1 (
+id int
+) ENGINE=InnoDB;
+INSERT INTO t1 (id) VALUES (11);
+CREATE TABLE t2 (
+t1_id int,
+position int,
+KEY t1_id (t1_id),
+KEY t1_id_position (t1_id,position)
+) ENGINE=InnoDB;
+EXPLAIN SELECT
+(SELECT position FROM t2
+WHERE t2.t1_id = t1.id
+ORDER BY t2.t1_id , t2.position
+LIMIT 10,1
+) AS maxkey
+FROM t1
+LIMIT 1;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	1	
+2	DEPENDENT SUBQUERY	t2	ref	t1_id,t1_id_position	t1_id_position	5	test.t1.id	1	Using where
+SELECT
+(SELECT position FROM t2
+WHERE t2.t1_id = t1.id
+ORDER BY t2.t1_id , t2.position
+LIMIT 10,1
+) AS maxkey
+FROM t1
+LIMIT 1;
+maxkey
+NULL
+DROP TABLE t1,t2;
+End of 5.1 tests

mysql-test/t/subselect_innodb.test

@@ -238,3 +238,59 @@ call p1();
 call p1();
 drop procedure p1;
 drop tables t1,t2,t3;
+
+--echo #
+--echo # Bug #11766300  59387: FAILING ASSERTION: CURSOR->POS_STATE == 1997660512 (BTR_PCUR_IS_POSITIONE
+--echo #
+
+CREATE TABLE t1 (a INT) ENGINE=INNODB;
+INSERT INTO t1 VALUES (0);
+CREATE TABLE t2 (d BINARY(2), PRIMARY KEY (d(1)), UNIQUE KEY (d)) ENGINE=INNODB;
+
+SELECT 1 FROM t1 WHERE NOT EXISTS
+(SELECT 1 FROM t2 WHERE d = (SELECT d FROM t2 WHERE a >= 1) ORDER BY d);
+
+EXPLAIN SELECT 1 FROM t1 WHERE NOT EXISTS
+(SELECT 1 FROM t2 WHERE d = (SELECT d FROM t2 WHERE a >= 1) ORDER BY d);
+
+DROP TABLE t2;
+
+CREATE TABLE t2 (b INT, c INT, UNIQUE KEY (b), UNIQUE KEY (b, c )) ENGINE=INNODB;
+INSERT INTO t2 VALUES (1, 1);
+
+SELECT 1 FROM t1
+WHERE a != (SELECT 1 FROM t2 WHERE a <=> b OR a > '' AND 6 = 7 ORDER BY b, c);
+
+DROP TABLE t1, t2;
+
+--echo #
+--echo # Bug #13639204 64111: CRASH ON SELECT SUBQUERY WITH NON UNIQUE
+--echo # INDEX
+--echo #
+CREATE TABLE t1 (
+id int
+) ENGINE=InnoDB;
+INSERT INTO t1 (id) VALUES (11);
+
+CREATE TABLE t2 (
+t1_id int,
+position int,
+KEY t1_id (t1_id),
+KEY t1_id_position (t1_id,position)
+) ENGINE=InnoDB;
+
+let $query=SELECT
+(SELECT position FROM t2
+WHERE t2.t1_id = t1.id
+ORDER BY t2.t1_id , t2.position
+LIMIT 10,1
+) AS maxkey
+FROM t1
+LIMIT 1;
+
+eval EXPLAIN $query;
+eval $query;
+
+DROP TABLE t1,t2;
+
+--echo End of 5.1 tests

sql/sql_select.cc

@@ -5793,6 +5793,7 @@ static bool create_ref_for_key(JOIN *join, JOIN_TAB *j, KEYUSE *org_keyuse,
       }
       keyuse++;
     } while (keyuse->table == table && keyuse->key == key);
+    DBUG_ASSERT(length > 0 && keyparts != 0);
   } /* not ftkey */
 
   /* set up fieldref */
@@ -13426,6 +13427,9 @@ test_if_skip_sort_order(JOIN_TAB *tab,ORDER *order,ha_rows select_limit,
   DBUG_ENTER("test_if_skip_sort_order");
   LINT_INIT(ref_key_parts);
 
+  /* Check that we are always called with first non-const table */
+  DBUG_ASSERT(tab == tab->join->join_tab + tab->join->const_tables);
+
   /*
     Keys disabled by ALTER TABLE ... DISABLE KEYS should have already
     been taken into account.
@@ -13507,7 +13511,8 @@ test_if_skip_sort_order(JOIN_TAB *tab,ORDER *order,ha_rows select_limit,
           while (keyuse->key != new_ref_key && keyuse->table == tab->table)
             keyuse++;
           if (create_ref_for_key(tab->join, tab, keyuse, 
-                                 tab->join->const_table_map))
+                                 (tab->join->const_table_map |
+                                  OUTER_REF_TABLE_BIT)))
             DBUG_RETURN(0);
 
           pick_table_access_method(tab);

storage/innobase/handler/ha_innodb.cc

@@ -4871,6 +4871,7 @@ ha_innobase::index_read(
 	DBUG_ENTER("index_read");
 
 	ut_a(prebuilt->trx == thd_to_trx(user_thd));
+	ut_ad(key_len != 0 || find_flag != HA_READ_KEY_EXACT);
 
 	ha_statistic_increment(&SSV::ha_read_key_count);
 

storage/innodb_plugin/handler/ha_innodb.cc

@@ -5575,6 +5575,7 @@ ha_innobase::index_read(
 	DBUG_ENTER("index_read");
 
 	ut_a(prebuilt->trx == thd_to_trx(user_thd));
+	ut_ad(key_len != 0 || find_flag != HA_READ_KEY_EXACT);
 
 	ha_statistic_increment(&SSV::ha_read_key_count);