MDEV-18956 Assertion `sel->quick' failed in JOIN::make_range_rowid_fi…

…lters

If SUBS_IN_TO_EXISTS strategy has been chosen for a subquery then
additional conditions are injected into WHERE/ON/HAVING of this subquery
and it may happen that test_quick_select() invoked from
JOIN::make_range_rowid_filters() discovers impossible range. This
must be checked.

mysql-test/main/rowid_filter.result

@@ -1987,4 +1987,29 @@ pk	i
 1	10
 2	20
 DROP TABLE t1;
+#
+# MDEV-18956: Possible rowid filter for subquery for which
+#             in_to_exists strategy has been chosen
+#
+CREATE TABLE t1 (pk int) engine=myisam ;
+INSERT INTO t1 VALUES (1),(2);
+CREATE TABLE t2 (
+pk int auto_increment PRIMARY KEY,
+i1 int, i2 int, c2 varchar(1),
+KEY (i1), KEY (i2)
+) engine=myisam;
+INSERT INTO t2 VALUES
+(1,8,6,'t'),(2,5,7,'i'),(3,4,4,'h'),(4,207,38,'d'),(5,183,206,'b'),
+(6,7,null,'o'),(7,1,2,'j'),(8,17,36,'s'),(9,4,5,'q'),(10,0,6,'l'),
+(11,1,9,'j'),(12,5,6,'y'),(13,null,0,'i'),(14,7,7,'x'),(15,5,2,'u');
+SELECT * FROM t1 HAVING (7, 9) IN (SELECT t2.i1, t2.i2 FROM t2 WHERE t2.i1 = 3);
+pk
+EXPLAIN EXTENDED
+SELECT * FROM t1 HAVING (7, 9) IN (SELECT t2.i1, t2.i2 FROM t2 WHERE t2.i1 = 3);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible HAVING
+2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
+Warnings:
+Note	1003	/* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` having 0
+DROP TABLE t1,t2;
 set @@use_stat_tables=@save_use_stat_tables;

mysql-test/main/rowid_filter.test

@@ -275,4 +275,29 @@ SELECT * FROM t1 WHERE pk < 5;
 
 DROP TABLE t1;
 
+--echo #
+--echo # MDEV-18956: Possible rowid filter for subquery for which
+--echo #             in_to_exists strategy has been chosen
+--echo #
+
+CREATE TABLE t1 (pk int) engine=myisam ;
+INSERT INTO t1 VALUES (1),(2);
+
+CREATE TABLE t2 (
+  pk int auto_increment PRIMARY KEY,
+  i1 int, i2 int, c2 varchar(1),
+  KEY (i1), KEY (i2)
+) engine=myisam;
+
+INSERT INTO t2 VALUES
+  (1,8,6,'t'),(2,5,7,'i'),(3,4,4,'h'),(4,207,38,'d'),(5,183,206,'b'),
+  (6,7,null,'o'),(7,1,2,'j'),(8,17,36,'s'),(9,4,5,'q'),(10,0,6,'l'),
+  (11,1,9,'j'),(12,5,6,'y'),(13,null,0,'i'),(14,7,7,'x'),(15,5,2,'u');
+
+SELECT * FROM t1 HAVING (7, 9) IN (SELECT t2.i1, t2.i2 FROM t2 WHERE t2.i1 = 3);
+EXPLAIN EXTENDED
+SELECT * FROM t1 HAVING (7, 9) IN (SELECT t2.i1, t2.i2 FROM t2 WHERE t2.i1 = 3);
+
+DROP TABLE t1,t2;
+
 set @@use_stat_tables=@save_use_stat_tables;

mysql-test/main/rowid_filter_innodb.result

@@ -1916,6 +1916,31 @@ pk	i
 1	10
 2	20
 DROP TABLE t1;
+#
+# MDEV-18956: Possible rowid filter for subquery for which
+#             in_to_exists strategy has been chosen
+#
+CREATE TABLE t1 (pk int) engine=myisam ;
+INSERT INTO t1 VALUES (1),(2);
+CREATE TABLE t2 (
+pk int auto_increment PRIMARY KEY,
+i1 int, i2 int, c2 varchar(1),
+KEY (i1), KEY (i2)
+) engine=myisam;
+INSERT INTO t2 VALUES
+(1,8,6,'t'),(2,5,7,'i'),(3,4,4,'h'),(4,207,38,'d'),(5,183,206,'b'),
+(6,7,null,'o'),(7,1,2,'j'),(8,17,36,'s'),(9,4,5,'q'),(10,0,6,'l'),
+(11,1,9,'j'),(12,5,6,'y'),(13,null,0,'i'),(14,7,7,'x'),(15,5,2,'u');
+SELECT * FROM t1 HAVING (7, 9) IN (SELECT t2.i1, t2.i2 FROM t2 WHERE t2.i1 = 3);
+pk
+EXPLAIN EXTENDED
+SELECT * FROM t1 HAVING (7, 9) IN (SELECT t2.i1, t2.i2 FROM t2 WHERE t2.i1 = 3);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	Impossible HAVING
+2	SUBQUERY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	no matching row in const table
+Warnings:
+Note	1003	/* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` having 0
+DROP TABLE t1,t2;
 set @@use_stat_tables=@save_use_stat_tables;
 #
 # MDEV-18755: possible RORI-plan and possible plan with range filter

sql/sql_select.cc

@@ -1621,12 +1621,22 @@ bool JOIN::make_range_rowid_filters()
     filter_map.merge(tab->table->with_impossible_ranges);
     bool force_index_save= tab->table->force_index;
     tab->table->force_index= true;
-    (void) sel->test_quick_select(thd, filter_map, (table_map) 0,
-                                  (ha_rows) HA_POS_ERROR,
-                                  true, false, true, true);
+    int rc= sel->test_quick_select(thd, filter_map, (table_map) 0,
+                                   (ha_rows) HA_POS_ERROR,
+                                   true, false, true, true);
     tab->table->force_index= force_index_save;
     if (thd->is_error())
       goto no_filter;
+    /*
+      If SUBS_IN_TO_EXISTS strtrategy is chosen for the subquery then
+      additional conditions are injected into WHERE/ON/HAVING and it may
+      happen that the call of test_quick_select() discovers impossible range.
+    */
+    if (rc == -1)
+    {
+      const_table_map|= tab->table->map;
+      goto no_filter;
+    }
     DBUG_ASSERT(sel->quick);
     filter_container=
       tab->range_rowid_filter_info->create_container();