drop table if exists t0,t1,t2,t3,t4,t5,t6,t7,t8,t9; drop view if exists v1; SET @save_optimizer_switch=@@optimizer_switch; SET optimizer_switch='outer_join_with_cache=off'; SET optimizer_switch='semijoin_with_cache=off'; set optimizer_switch='subquery_cache=on'; create table t1 (a int, b int); insert into t1 values (1,2),(3,4),(1,2),(3,4),(3,4),(4,5),(4,5),(5,6),(5,6),(4,5); create table t2 (c int, d int); insert into t2 values (2,3),(3,4),(5,6),(4,1); * * Test subquery as top item in different clauses * #single value subquery test (SELECT list) flush status; select a, (select d from t2 where b=c) from t1; a (select d from t2 where b=c) 1 3 3 1 1 3 3 1 3 1 4 6 4 6 5 NULL 5 NULL 4 6 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 6 Subquery_cache_miss 4 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 7 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 31 analyze format=json select a, (select d from t2 where b=c) from t1; ANALYZE { "query_block": { "select_id": 1, "r_loops": 1, "r_total_time_ms": "REPLACED", "table": { "table_name": "t1", "access_type": "ALL", "r_loops": 1, "rows": 10, "r_rows": 10, "r_total_time_ms": "REPLACED", "filtered": 100, "r_filtered": 100 }, "subqueries": [ { "expression_cache": { "r_loops": 10, "r_hit_ratio": 60, "query_block": { "select_id": 2, "r_loops": 4, "r_total_time_ms": "REPLACED", "table": { "table_name": "t2", "access_type": "ALL", "r_loops": 4, "rows": 4, "r_rows": 4, "r_total_time_ms": "REPLACED", "filtered": 100, "r_filtered": 18.75, "attached_condition": "(t1.b = t2.c)" } } } } ] } } analyze format=json select a, (select d from t2 where b=c), (select d from t2 where b=c union select 1 order by 1 limit 1) from t1; ANALYZE { "query_block": { "select_id": 1, "r_loops": 1, "r_total_time_ms": "REPLACED", "table": { "table_name": "t1", "access_type": "ALL", "r_loops": 1, "rows": 10, "r_rows": 10, "r_total_time_ms": "REPLACED", "filtered": 100, "r_filtered": 100 }, "subqueries": [ { "expression_cache": { "r_loops": 10, "r_hit_ratio": 60, "query_block": { "union_result": { "table_name": "", "access_type": "ALL", "r_loops": 4, "r_rows": 1, "query_specifications": [ { "query_block": { "select_id": 3, "r_loops": 4, "r_total_time_ms": "REPLACED", "table": { "table_name": "t2", "access_type": "ALL", "r_loops": 4, "rows": 4, "r_rows": 4, "r_total_time_ms": "REPLACED", "filtered": 100, "r_filtered": 18.75, "attached_condition": "(t1.b = t2.c)" } } }, { "query_block": { "select_id": 4, "table": { "message": "No tables used" } } } ] } } } }, { "expression_cache": { "r_loops": 10, "r_hit_ratio": 60, "query_block": { "select_id": 2, "r_loops": 4, "r_total_time_ms": "REPLACED", "table": { "table_name": "t2", "access_type": "ALL", "r_loops": 4, "rows": 4, "r_rows": 4, "r_total_time_ms": "REPLACED", "filtered": 100, "r_filtered": 18.75, "attached_condition": "(t1.b = t2.c)" } } } } ] } } explain format=json select a, (select d from t2 where b=c) from t1; EXPLAIN { "query_block": { "select_id": 1, "table": { "table_name": "t1", "access_type": "ALL", "rows": 10, "filtered": 100 }, "subqueries": [ { "expression_cache": { "state": "uninitialized", "query_block": { "select_id": 2, "table": { "table_name": "t2", "access_type": "ALL", "rows": 4, "filtered": 100, "attached_condition": "(t1.b = t2.c)" } } } } ] } } explain format=json select a, (select d from t2 where b=c), (select d from t2 where b=c union select 1 order by 1 limit 1) from t1; EXPLAIN { "query_block": { "select_id": 1, "table": { "table_name": "t1", "access_type": "ALL", "rows": 10, "filtered": 100 }, "subqueries": [ { "expression_cache": { "state": "uninitialized", "query_block": { "union_result": { "table_name": "", "access_type": "ALL", "query_specifications": [ { "query_block": { "select_id": 3, "table": { "table_name": "t2", "access_type": "ALL", "rows": 4, "filtered": 100, "attached_condition": "(t1.b = t2.c)" } } }, { "query_block": { "select_id": 4, "table": { "message": "No tables used" } } } ] } } } }, { "expression_cache": { "state": "uninitialized", "query_block": { "select_id": 2, "table": { "table_name": "t2", "access_type": "ALL", "rows": 4, "filtered": 100, "attached_condition": "(t1.b = t2.c)" } } } } ] } } set optimizer_switch='subquery_cache=off'; flush status; select a, (select d from t2 where b=c) from t1; a (select d from t2 where b=c) 1 3 3 1 1 3 3 1 3 1 4 6 4 6 5 NULL 5 NULL 4 6 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 0 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 61 set optimizer_switch='subquery_cache=on'; #single value subquery test (where) flush status; select a from t1 where (select d from t2 where b=c); a 1 3 1 3 3 4 4 4 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 6 Subquery_cache_miss 4 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 7 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 31 set optimizer_switch='subquery_cache=off'; flush status; select a from t1 where (select d from t2 where b=c); a 1 3 1 3 3 4 4 4 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 0 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 61 set optimizer_switch='subquery_cache=on'; #single value subquery test (having) flush status; select a from t1 where a > 0 having (select d from t2 where b=c); a 1 3 1 3 3 4 4 4 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 6 Subquery_cache_miss 4 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 7 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 31 set optimizer_switch='subquery_cache=off'; flush status; select a from t1 where a > 0 having (select d from t2 where b=c); a 1 3 1 3 3 4 4 4 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 0 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 61 set optimizer_switch='subquery_cache=on'; #single value subquery test (OUTER JOIN ON) flush status; select ta.a, tb.a from t1 ta join t1 tb on (select d from t2 where tb.b=c); a a 1 1 3 1 1 1 3 1 3 1 4 1 4 1 5 1 5 1 4 1 1 3 3 3 1 3 3 3 3 3 4 3 4 3 5 3 5 3 4 3 1 1 3 1 1 1 3 1 3 1 4 1 4 1 5 1 5 1 4 1 1 3 3 3 1 3 3 3 3 3 4 3 4 3 5 3 5 3 4 3 1 3 3 3 1 3 3 3 3 3 4 3 4 3 5 3 5 3 4 3 1 4 3 4 1 4 3 4 3 4 4 4 4 4 5 4 5 4 4 4 1 4 3 4 1 4 3 4 3 4 4 4 4 4 5 4 5 4 4 4 1 4 3 4 1 4 3 4 3 4 4 4 4 4 5 4 5 4 4 4 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 6 Subquery_cache_miss 4 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 7 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 442 set optimizer_switch='subquery_cache=off'; flush status; select ta.a, tb.a from t1 ta join t1 tb on (select d from t2 where tb.b=c); a a 1 1 3 1 1 1 3 1 3 1 4 1 4 1 5 1 5 1 4 1 1 3 3 3 1 3 3 3 3 3 4 3 4 3 5 3 5 3 4 3 1 1 3 1 1 1 3 1 3 1 4 1 4 1 5 1 5 1 4 1 1 3 3 3 1 3 3 3 3 3 4 3 4 3 5 3 5 3 4 3 1 3 3 3 1 3 3 3 3 3 4 3 4 3 5 3 5 3 4 3 1 4 3 4 1 4 3 4 3 4 4 4 4 4 5 4 5 4 4 4 1 4 3 4 1 4 3 4 3 4 4 4 4 4 5 4 5 4 4 4 1 4 3 4 1 4 3 4 3 4 4 4 4 4 5 4 5 4 4 4 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 0 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 472 set optimizer_switch='subquery_cache=on'; #single value subquery test (GROUP BY) flush status; select max(a) from t1 GROUP BY (select d from t2 where b=c); max(a) 5 3 1 4 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 10 Subquery_cache_miss 4 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 17 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 4 Handler_read_rnd_deleted 0 Handler_read_rnd_next 36 set optimizer_switch='subquery_cache=off'; flush status; select max(a) from t1 GROUP BY (select d from t2 where b=c); max(a) 5 3 1 4 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 10 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 4 Handler_read_rnd_deleted 0 Handler_read_rnd_next 86 set optimizer_switch='subquery_cache=on'; #single value subquery test (distinct GROUP BY) flush status; select distinct max(a) from t1 GROUP BY (select d from t2 where b=c); max(a) 5 3 1 4 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 10 Subquery_cache_miss 4 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 17 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 4 Handler_read_rnd_deleted 0 Handler_read_rnd_next 41 set optimizer_switch='subquery_cache=off'; flush status; select distinct max(a) from t1 GROUP BY (select d from t2 where b=c); max(a) 5 3 1 4 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 10 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 4 Handler_read_rnd_deleted 0 Handler_read_rnd_next 91 set optimizer_switch='subquery_cache=on'; #single value subquery test (ORDER BY) flush status; select a from t1 ORDER BY (select d from t2 where b=c); a 5 5 3 3 3 1 1 4 4 4 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 6 Subquery_cache_miss 4 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 7 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 31 set optimizer_switch='subquery_cache=off'; flush status; select a from t1 ORDER BY (select d from t2 where b=c); a 5 5 3 3 3 1 1 4 4 4 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 0 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 61 set optimizer_switch='subquery_cache=on'; #single value subquery test (distinct ORDER BY) flush status; select distinct a from t1 ORDER BY (select d from t2 where b=c); a 5 3 1 4 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 6 Subquery_cache_miss 4 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 7 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 4 Handler_read_rnd_deleted 1 Handler_read_rnd_next 36 set optimizer_switch='subquery_cache=off'; flush status; select distinct a from t1 ORDER BY (select d from t2 where b=c); a 5 3 1 4 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 0 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 4 Handler_read_rnd_deleted 1 Handler_read_rnd_next 66 set optimizer_switch='subquery_cache=on'; #single value subquery test (LEFT JOIN ON) flush status; select ta.a, tb.a from t1 ta left join t1 tb on (select d from t2 where tb.b=c); a a 1 1 1 3 1 1 1 3 1 3 1 4 1 4 1 4 3 1 3 3 3 1 3 3 3 3 3 4 3 4 3 4 1 1 1 3 1 1 1 3 1 3 1 4 1 4 1 4 3 1 3 3 3 1 3 3 3 3 3 4 3 4 3 4 3 1 3 3 3 1 3 3 3 3 3 4 3 4 3 4 4 1 4 3 4 1 4 3 4 3 4 4 4 4 4 4 4 1 4 3 4 1 4 3 4 3 4 4 4 4 4 4 5 1 5 3 5 1 5 3 5 3 5 4 5 4 5 4 5 1 5 3 5 1 5 3 5 3 5 4 5 4 5 4 4 1 4 3 4 1 4 3 4 3 4 4 4 4 4 4 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 106 Subquery_cache_miss 4 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 70 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 141 set optimizer_switch='subquery_cache=off'; flush status; select ta.a, tb.a from t1 ta left join t1 tb on (select d from t2 where tb.b=c); a a 1 1 1 3 1 1 1 3 1 3 1 4 1 4 1 4 3 1 3 3 3 1 3 3 3 3 3 4 3 4 3 4 1 1 1 3 1 1 1 3 1 3 1 4 1 4 1 4 3 1 3 3 3 1 3 3 3 3 3 4 3 4 3 4 3 1 3 3 3 1 3 3 3 3 3 4 3 4 3 4 4 1 4 3 4 1 4 3 4 3 4 4 4 4 4 4 4 1 4 3 4 1 4 3 4 3 4 4 4 4 4 4 5 1 5 3 5 1 5 3 5 3 5 4 5 4 5 4 5 1 5 3 5 1 5 3 5 3 5 4 5 4 5 4 4 1 4 3 4 1 4 3 4 3 4 4 4 4 4 4 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 0 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 671 set optimizer_switch='subquery_cache=on'; #single value subquery test (PS) prepare stmt1 from 'select a, (select d from t2 where b=c) + 1 from t1'; execute stmt1; a (select d from t2 where b=c) + 1 1 4 3 2 1 4 3 2 3 2 4 7 4 7 5 NULL 5 NULL 4 7 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 6 Subquery_cache_miss 4 execute stmt1; a (select d from t2 where b=c) + 1 1 4 3 2 1 4 3 2 3 2 4 7 4 7 5 NULL 5 NULL 4 7 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 12 Subquery_cache_miss 8 deallocate prepare stmt1; #single value subquery test (SP) CREATE PROCEDURE p1() select a, (select d from t2 where b=c) + 1 from t1; call p1; a (select d from t2 where b=c) + 1 1 4 3 2 1 4 3 2 3 2 4 7 4 7 5 NULL 5 NULL 4 7 call p1; a (select d from t2 where b=c) + 1 1 4 3 2 1 4 3 2 3 2 4 7 4 7 5 NULL 5 NULL 4 7 drop procedure p1; #IN subquery test flush status; show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 select a, b , b in (select d from t2) as SUBS from t1; a b SUBS 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 1 5 6 1 4 5 0 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 6 Subquery_cache_miss 4 insert into t1 values (7,8),(9,NULL); select a, b , b in (select d from t2) as SUBS from t1; a b SUBS 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 1 5 6 1 4 5 0 7 8 0 9 NULL NULL show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 12 Subquery_cache_miss 10 insert into t2 values (8,NULL); select a, b , b in (select d from t2) as SUBS from t1; a b SUBS 1 2 NULL 3 4 1 1 2 NULL 3 4 1 3 4 1 4 5 NULL 4 5 NULL 5 6 1 5 6 1 4 5 NULL 7 8 NULL 9 NULL NULL show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 18 Subquery_cache_miss 16 # multicolumn NOT IN with NULLs flush status; set optimizer_switch='subquery_cache=off'; select a, b, (b, a) not in (select d, c from t2) as SUBS from t1; a b SUBS 1 2 1 3 4 0 1 2 1 3 4 0 3 4 0 4 5 1 4 5 1 5 6 0 5 6 0 4 5 1 7 8 1 9 NULL 1 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 set optimizer_switch='subquery_cache=on'; select a, b, (b, a) not in (select d, c from t2) as SUBS from t1; a b SUBS 1 2 1 3 4 0 1 2 1 3 4 0 3 4 0 4 5 1 4 5 1 5 6 0 5 6 0 4 5 1 7 8 1 9 NULL 1 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 6 Subquery_cache_miss 6 # multicolumn NOT IN with NULLs (other order) flush status; set optimizer_switch='subquery_cache=off'; select a, b, (a, b) not in (select d, c from t2) as SUBS from t1; a b SUBS 1 2 1 3 4 1 1 2 1 3 4 1 3 4 1 4 5 1 4 5 1 5 6 1 5 6 1 4 5 1 7 8 NULL 9 NULL NULL show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 set optimizer_switch='subquery_cache=on'; select a, b, (a, b) not in (select d, c from t2) as SUBS from t1; a b SUBS 1 2 1 3 4 1 1 2 1 3 4 1 3 4 1 4 5 1 4 5 1 5 6 1 5 6 1 4 5 1 7 8 NULL 9 NULL NULL show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 6 Subquery_cache_miss 6 # multicolumn IN with NULLs flush status; set optimizer_switch='subquery_cache=off'; select a, b, (b, a) in (select d, c from t2) as SUBS from t1; a b SUBS 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 1 5 6 1 4 5 0 7 8 0 9 NULL 0 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 set optimizer_switch='subquery_cache=on'; select a, b, (b, a) in (select d, c from t2) as SUBS from t1; a b SUBS 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 1 5 6 1 4 5 0 7 8 0 9 NULL 0 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 6 Subquery_cache_miss 6 # multicolumn IN with NULLs (other order) flush status; set optimizer_switch='subquery_cache=off'; select a, b, (a, b) in (select d, c from t2) as SUBS from t1; a b SUBS 1 2 0 3 4 0 1 2 0 3 4 0 3 4 0 4 5 0 4 5 0 5 6 0 5 6 0 4 5 0 7 8 NULL 9 NULL NULL show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 set optimizer_switch='subquery_cache=on'; select a, b, (a, b) in (select d, c from t2) as SUBS from t1; a b SUBS 1 2 0 3 4 0 1 2 0 3 4 0 3 4 0 4 5 0 4 5 0 5 6 0 5 6 0 4 5 0 7 8 NULL 9 NULL NULL show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 6 Subquery_cache_miss 6 #IN subquery test (PS) delete from t1 where a > 6; delete from t2 where c > 6; prepare stmt1 from 'select a, b , b in (select d from t2) as SUBS from t1'; execute stmt1; a b SUBS 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 1 5 6 1 4 5 0 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 12 Subquery_cache_miss 10 execute stmt1; a b SUBS 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 1 5 6 1 4 5 0 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 18 Subquery_cache_miss 14 insert into t1 values (7,8),(9,NULL); execute stmt1; a b SUBS 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 1 5 6 1 4 5 0 9 NULL NULL 7 8 0 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 24 Subquery_cache_miss 20 execute stmt1; a b SUBS 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 1 5 6 1 4 5 0 9 NULL NULL 7 8 0 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 30 Subquery_cache_miss 26 insert into t2 values (8,NULL); execute stmt1; a b SUBS 1 2 NULL 3 4 1 1 2 NULL 3 4 1 3 4 1 4 5 NULL 4 5 NULL 5 6 1 5 6 1 4 5 NULL 9 NULL NULL 7 8 NULL show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 36 Subquery_cache_miss 32 execute stmt1; a b SUBS 1 2 NULL 3 4 1 1 2 NULL 3 4 1 3 4 1 4 5 NULL 4 5 NULL 5 6 1 5 6 1 4 5 NULL 9 NULL NULL 7 8 NULL show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 42 Subquery_cache_miss 38 deallocate prepare stmt1; #IN subquery test (SP) delete from t1 where a > 6; delete from t2 where c > 6; CREATE PROCEDURE p1() select a, b , b in (select d from t2) as SUBS from t1; call p1(); a b SUBS 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 1 5 6 1 4 5 0 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 48 Subquery_cache_miss 42 call p1(); a b SUBS 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 1 5 6 1 4 5 0 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 54 Subquery_cache_miss 46 insert into t1 values (7,8),(9,NULL); call p1(); a b SUBS 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 1 5 6 1 4 5 0 9 NULL NULL 7 8 0 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 60 Subquery_cache_miss 52 call p1(); a b SUBS 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 1 5 6 1 4 5 0 9 NULL NULL 7 8 0 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 66 Subquery_cache_miss 58 insert into t2 values (8,NULL); call p1(); a b SUBS 1 2 NULL 3 4 1 1 2 NULL 3 4 1 3 4 1 4 5 NULL 4 5 NULL 5 6 1 5 6 1 4 5 NULL 9 NULL NULL 7 8 NULL show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 72 Subquery_cache_miss 64 call p1(); a b SUBS 1 2 NULL 3 4 1 1 2 NULL 3 4 1 3 4 1 4 5 NULL 4 5 NULL 5 6 1 5 6 1 4 5 NULL 9 NULL NULL 7 8 NULL show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 78 Subquery_cache_miss 70 drop procedure p1; # test of simple exists select a, b , exists (select * from t2 where b=d) as SUBS from t1; a b SUBS 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 1 5 6 1 4 5 0 9 NULL 0 7 8 0 # test of prepared statement exists show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 84 Subquery_cache_miss 76 prepare stmt1 from 'select a, b , exists (select * from t2 where b=d) as SUBS from t1'; execute stmt1; a b SUBS 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 1 5 6 1 4 5 0 9 NULL 0 7 8 0 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 90 Subquery_cache_miss 82 execute stmt1; a b SUBS 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 1 5 6 1 4 5 0 9 NULL 0 7 8 0 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 96 Subquery_cache_miss 88 deallocate prepare stmt1; # test of stored procedure exists CREATE PROCEDURE p1() select a, b , exists (select * from t2 where b=d) as SUBS from t1; call p1; a b SUBS 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 1 5 6 1 4 5 0 9 NULL 0 7 8 0 call p1; a b SUBS 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 1 5 6 1 4 5 0 9 NULL 0 7 8 0 drop procedure p1; #several subqueries set optimizer_switch='subquery_cache=off'; flush status; select a, b , exists (select * from t2 where b=d) as SUBSE, b in (select d from t2) as SUBSI, (select d from t2 where b=c) SUBSR from t1; a b SUBSE SUBSI SUBSR 1 2 0 NULL 3 3 4 1 1 1 1 2 0 NULL 3 3 4 1 1 1 3 4 1 1 1 4 5 0 NULL 6 4 5 0 NULL 6 5 6 1 1 NULL 5 6 1 1 NULL 4 5 0 NULL 6 9 NULL 0 NULL NULL 7 8 0 NULL NULL show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 11 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 145 set optimizer_switch='subquery_cache=on'; flush status; select a, b , exists (select * from t2 where b=d) as SUBSE, b in (select d from t2) as SUBSI, (select d from t2 where b=c) SUBSR from t1; a b SUBSE SUBSI SUBSR 1 2 0 NULL 3 3 4 1 1 1 1 2 0 NULL 3 3 4 1 1 1 3 4 1 1 1 4 5 0 NULL 6 4 5 0 NULL 6 5 6 1 1 NULL 5 6 1 1 NULL 4 5 0 NULL 6 9 NULL 0 NULL NULL 7 8 0 NULL NULL show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 18 Subquery_cache_miss 18 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 32 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 84 #several subqueries (several levels) set optimizer_switch='subquery_cache=off'; flush status; set optimizer_switch='subquery_cache=off'; flush status; select a, b, (select exists (select * from t2 where b=d) from t2 where b=c) as SUNS1 from t1; a b SUNS1 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 NULL 5 6 NULL 4 5 0 9 NULL NULL 7 8 0 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 0 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 127 set optimizer_switch='subquery_cache=on'; flush status; select a, b, (select exists (select * from t2 where b=d) from t2 where b=c) as SUNS1 from t1; a b SUNS1 1 2 0 3 4 1 1 2 0 3 4 1 3 4 1 4 5 0 4 5 0 5 6 NULL 5 6 NULL 4 5 0 9 NULL NULL 7 8 0 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 6 Subquery_cache_miss 10 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 13 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 69 #clean up drop table t1,t2; test different types #int CREATE TABLE t1 ( a int, b int); INSERT INTO t1 VALUES(1,1),(2,2),(3,3); SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = 2); a 1 3 DROP TABLE t1; #char CREATE TABLE t1 ( a char(1), b char (1)); INSERT INTO t1 VALUES('1','1'),('2','2'),('3','3'); SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = '2'); a 1 3 DROP TABLE t1; #decimal CREATE TABLE t1 ( a decimal(3,1), b decimal(3,1)); INSERT INTO t1 VALUES(1,1),(2,2),(3,3); SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = 2); a 1.0 3.0 DROP TABLE t1; #date CREATE TABLE t1 ( a date, b date); INSERT INTO t1 VALUES('1000-01-01','1000-01-01'),('2000-02-01','2000-02-01'),('3000-03-03','3000-03-03'); SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = '2000-02-01'); a 1000-01-01 3000-03-03 DROP TABLE t1; #datetime CREATE TABLE t1 ( a datetime, b datetime); INSERT INTO t1 VALUES('1000-01-01 01:01:01','1000-01-01 01:01:01'),('2000-02-02 02:02:02','2000-02-02 02:02:02'),('3000-03-03 03:03:03','3000-03-03 03:03:03'); SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = '2000-02-02 02:02:02'); a 1000-01-01 01:01:01 3000-03-03 03:03:03 DROP TABLE t1; #time CREATE TABLE t1 ( a time, b time); INSERT INTO t1 VALUES('01:01:01','01:01:01'),('02:02:02','02:02:02'),('03:03:03','03:03:03'); SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = '02:02:02'); a 01:01:01 03:03:03 DROP TABLE t1; #timestamp CREATE TABLE t1 ( a timestamp, b timestamp); INSERT INTO t1 VALUES('2000-02-02 01:01:01','2000-02-02 01:01:01'),('2000-02-02 02:02:02','2000-02-02 02:02:02'),('2000-02-02 03:03:03','2000-02-02 03:03:03'); SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = '2000-02-02 02:02:02'); a 2000-02-02 01:01:01 2000-02-02 03:03:03 DROP TABLE t1; #bit CREATE TABLE t1 ( a bit(20), b bit(20)); INSERT INTO t1 VALUES(1,1),(2,2),(3,3); SELECT a+0 FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = 2); a+0 1 3 DROP TABLE t1; #enum CREATE TABLE t1 ( a enum('1','2','3'), b enum('1','2','3')); INSERT INTO t1 VALUES('1','1'),('2','2'),('3','3'); SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = '2'); a 1 3 DROP TABLE t1; #set CREATE TABLE t1 ( a set('1','2','3'), b set('1','2','3')); INSERT INTO t1 VALUES('1','1'),('2','2'),('3','3'); SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = '2'); a 1 3 DROP TABLE t1; #blob CREATE TABLE t1 ( a blob, b blob); INSERT INTO t1 VALUES('1','1'),('2','2'),('3','3'); SELECT a FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = '2'); a 1 3 DROP TABLE t1; #geometry CREATE TABLE t1 ( a geometry, b geometry); INSERT INTO t1 VALUES(POINT(1,1),POINT(1,1)),(POINT(2,2),POINT(2,2)),(POINT(3,3),POINT(3,3)); SELECT astext(a) FROM t1 WHERE NOT a IN (SELECT a FROM t1 WHERE b = POINT(2,2)); astext(a) POINT(1 1) POINT(3 3) DROP TABLE t1; #uncacheable queries test (random and side effect) flush status; CREATE TABLE t1 (a int); INSERT INTO t1 VALUES (2), (4), (1), (3); select a, a in (select a from t1) from t1 as ext; a a in (select a from t1) 2 1 4 1 1 1 3 1 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 4 select a, a in (select a from t1 where -1 < rand()) from t1 as ext; a a in (select a from t1 where -1 < rand()) 2 1 4 1 1 1 3 1 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 4 select a, a in (select a from t1 where -1 < benchmark(a,100)) from t1 as ext; a a in (select a from t1 where -1 < benchmark(a,100)) 2 1 4 1 1 1 3 1 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 4 drop table t1; #test of sql_big_tables switch and outer table reference in subquery with grouping set big_tables=1; CREATE TABLE t1 (a INT PRIMARY KEY, b INT); INSERT INTO t1 VALUES (1,1),(2,1),(3,2),(4,2),(5,3),(6,3); SELECT (SELECT t1_outer.a FROM t1 AS t1_inner GROUP BY b LIMIT 1) FROM t1 AS t1_outer; (SELECT t1_outer.a FROM t1 AS t1_inner GROUP BY b LIMIT 1) 1 2 3 4 5 6 drop table t1; set big_tables=0; #test of function reference to outer query set local group_concat_max_len=400; create table t2 (a int, b int); insert into t2 values (1,1), (2,2); select b x, (select group_concat(x) from t2) from t2; x (select group_concat(x) from t2) 1 1,1 2 2,2 drop table t2; set local group_concat_max_len=default; #aggregate functions CREATE TABLE t1 (a int, b INT); CREATE TABLE t2 (c int, d INT); insert into t1 values (2,1), (3,1), (2,4), (3,4), (10,2), (20,2), (2,5), (3,5), (100,3), (200,3), (10,6), (20,6), (20,7), (100,8), (200,8); insert into t2 values (1,1),(3,3),(20,20); aggregate function as parameter of subquery set optimizer_switch='subquery_cache=off'; flush status; select max(a), (select max(a) from t2 where max(a)=c) from t1 group by b; max(a) (select max(a) from t2 where max(a)=c) 3 3 20 20 200 NULL 3 3 3 3 20 20 20 20 200 NULL show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 15 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 8 Handler_read_rnd_deleted 0 Handler_read_rnd_next 57 set optimizer_switch='subquery_cache=on'; flush status; select max(a), (select max(a) from t2 where max(a)=c) from t1 group by b; max(a) (select max(a) from t2 where max(a)=c) 3 3 20 20 200 NULL 3 3 3 3 20 20 20 20 200 NULL show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 5 Subquery_cache_miss 3 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 21 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 8 Handler_read_rnd_deleted 0 Handler_read_rnd_next 37 argument of aggregate function as parameter of subquery (illegal use) set optimizer_switch='subquery_cache=off'; flush status; select max(a), (select a from t2 where a=c) from t1 group by b; max(a) (select a from t2 where a=c) 3 NULL 20 NULL 200 NULL 3 NULL 3 NULL 20 NULL 20 20 200 NULL show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 15 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 8 Handler_read_rnd_deleted 0 Handler_read_rnd_next 57 set optimizer_switch='subquery_cache=on'; flush status; select max(a), (select a from t2 where a=c) from t1 group by b; max(a) (select a from t2 where a=c) 3 NULL 20 NULL 200 NULL 3 NULL 3 NULL 20 NULL 20 20 200 NULL show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 4 Subquery_cache_miss 4 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 22 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 8 Handler_read_rnd_deleted 0 Handler_read_rnd_next 41 drop table t1,t2; #test of flattening subquery optimisations and cache create table t0 (a int); insert into t0 values (9),(8),(7),(6),(5),(4),(3),(2),(1),(0); create table t1(a int, b int); insert into t1 values (0,0),(1,1),(2,2),(0,0),(1,1),(2,2),(0,0),(1,1),(2,2),(0,0),(1,1),(2,2),(0,0),(1,1),(2,2); create table t2 (pk int, a int, primary key(pk)); insert into t2 select a,a from t0; set optimizer_switch='default,semijoin=on,materialization=on,subquery_cache=on'; flush status; select * from t1 where a in (select pk from t2); a b 0 0 1 1 2 2 0 0 1 1 2 2 0 0 1 1 2 2 0 0 1 1 2 2 0 0 1 1 2 2 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 15 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 16 alter table t2 drop primary key; set optimizer_switch='default,semijoin=off,materialization=off,subquery_cache=off'; explain select * from t1 where a in (select pk from t2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 15 Using where 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where flush status; select * from t1 where a in (select pk from t2); a b 0 0 1 1 2 2 0 0 1 1 2 2 0 0 1 1 2 2 0 0 1 1 2 2 0 0 1 1 2 2 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 0 Subquery_cache_miss 0 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 0 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 151 set optimizer_switch='default,semijoin=off,materialization=off,subquery_cache=on'; explain select * from t1 where a in (select pk from t2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 15 Using where 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where flush status; select * from t1 where a in (select pk from t2); a b 0 0 1 1 2 2 0 0 1 1 2 2 0 0 1 1 2 2 0 0 1 1 2 2 0 0 1 1 2 2 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 12 Subquery_cache_miss 3 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 15 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 43 set optimizer_switch='default,semijoin=off,materialization=on,subquery_cache=on'; explain select * from t1 where a in (select pk from t2); id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 15 Using where 2 MATERIALIZED t2 ALL NULL NULL NULL NULL 10 flush status; select * from t1 where a in (select pk from t2); a b 0 0 1 1 2 2 0 0 1 1 2 2 0 0 1 1 2 2 0 0 1 1 2 2 0 0 1 1 2 2 show status like "subquery_cache%"; Variable_name Value Subquery_cache_hit 12 Subquery_cache_miss 3 show status like '%Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 18 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_retry 0 Handler_read_rnd 0 Handler_read_rnd_deleted 0 Handler_read_rnd_next 27 drop table t0,t1,t2; set optimizer_switch='default'; #launchpad BUG#608834 CREATE TABLE `t2` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_time_key` time DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_int_key` (`col_int_key`), KEY `col_time_key` (`col_time_key`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ) ENGINE=MyISAM AUTO_INCREMENT=30 DEFAULT CHARSET=latin1; INSERT INTO `t2` VALUES (10,7,8,'01:27:35','v','v'); INSERT INTO `t2` VALUES (11,1,9,'19:48:31','r','r'); INSERT INTO `t2` VALUES (12,5,9,'00:00:00','a','a'); INSERT INTO `t2` VALUES (13,3,186,'19:53:05','m','m'); INSERT INTO `t2` VALUES (14,6,NULL,'19:18:56','y','y'); INSERT INTO `t2` VALUES (15,92,2,'10:55:12','j','j'); INSERT INTO `t2` VALUES (16,7,3,'00:25:00','d','d'); INSERT INTO `t2` VALUES (17,NULL,0,'12:35:47','z','z'); INSERT INTO `t2` VALUES (18,3,133,'19:53:03','e','e'); INSERT INTO `t2` VALUES (19,5,1,'17:53:30','h','h'); INSERT INTO `t2` VALUES (20,1,8,'11:35:49','b','b'); INSERT INTO `t2` VALUES (21,2,5,NULL,'s','s'); INSERT INTO `t2` VALUES (22,NULL,5,'06:01:40','e','e'); INSERT INTO `t2` VALUES (23,1,8,'05:45:11','j','j'); INSERT INTO `t2` VALUES (24,0,6,'00:00:00','e','e'); INSERT INTO `t2` VALUES (25,210,51,'00:00:00','f','f'); INSERT INTO `t2` VALUES (26,8,4,'06:11:01','v','v'); INSERT INTO `t2` VALUES (27,7,7,'13:02:46','x','x'); INSERT INTO `t2` VALUES (28,5,6,'21:44:25','m','m'); INSERT INTO `t2` VALUES (29,NULL,4,'22:43:58','c','c'); CREATE TABLE `t1` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_time_key` time DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_int_key` (`col_int_key`), KEY `col_time_key` (`col_time_key`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ) ENGINE=MyISAM AUTO_INCREMENT=21 DEFAULT CHARSET=latin1; INSERT INTO `t1` VALUES (1,NULL,2,'11:28:45','w','w'); INSERT INTO `t1` VALUES (2,7,9,'20:25:14','m','m'); INSERT INTO `t1` VALUES (3,9,3,'13:47:24','m','m'); INSERT INTO `t1` VALUES (4,7,9,'19:24:11','k','k'); INSERT INTO `t1` VALUES (5,4,NULL,'15:59:13','r','r'); INSERT INTO `t1` VALUES (6,2,9,'00:00:00','t','t'); INSERT INTO `t1` VALUES (7,6,3,'15:15:04','j','j'); INSERT INTO `t1` VALUES (8,8,8,'11:32:06','u','u'); INSERT INTO `t1` VALUES (9,NULL,8,'18:32:33','h','h'); INSERT INTO `t1` VALUES (10,5,53,'15:19:25','o','o'); INSERT INTO `t1` VALUES (11,NULL,0,'19:03:19',NULL,NULL); INSERT INTO `t1` VALUES (12,6,5,'00:39:46','k','k'); INSERT INTO `t1` VALUES (13,188,166,NULL,'e','e'); INSERT INTO `t1` VALUES (14,2,3,'00:00:00','n','n'); INSERT INTO `t1` VALUES (15,1,0,'13:12:11','t','t'); INSERT INTO `t1` VALUES (16,1,1,'04:56:48','c','c'); INSERT INTO `t1` VALUES (17,0,9,'19:56:05','m','m'); INSERT INTO `t1` VALUES (18,9,5,'19:35:19','y','y'); INSERT INTO `t1` VALUES (19,NULL,6,'05:03:03','f','f'); INSERT INTO `t1` VALUES (20,4,2,'18:38:59','d','d'); set @@optimizer_switch='subquery_cache=off'; /* cache is off */ SELECT ( SELECT 4 FROM DUAL ) AS field1 , SUM( DISTINCT table1 . `pk` ) AS field2 , ( SELECT MAX( SUBQUERY2_t1 . `col_int_nokey` ) AS SUBQUERY2_field1 FROM ( t1 AS SUBQUERY2_t1 INNER JOIN t1 AS SUBQUERY2_t2 ON (SUBQUERY2_t2 . `col_int_key` = SUBQUERY2_t1 . `pk` ) ) WHERE SUBQUERY2_t2 . `col_varchar_nokey` <= table1 . `col_varchar_key` OR SUBQUERY2_t1 . `col_int_nokey` < table1 . `pk` ) AS field3 , table1 . `col_time_key` AS field4 , table1 . `col_int_key` AS field5 , CONCAT ( table2 . `col_varchar_nokey` , table1 . `col_varchar_key` ) AS field6 FROM ( t1 AS table1 INNER JOIN ( ( t1 AS table2 LEFT JOIN t2 AS table3 ON (table3 . `col_varchar_key` = table2 . `col_varchar_key` ) ) ) ON (table3 . `col_varchar_key` = table2 . `col_varchar_nokey` ) ) WHERE ( table2 . `col_varchar_nokey` NOT IN ( SELECT 'd' UNION SELECT 'u' ) ) OR table3 . `col_varchar_nokey` <= table1 . `col_varchar_key` GROUP BY field1, field3, field4, field5, field6 ORDER BY table1 . `col_int_key` , field1, field2, field3, field4, field5, field6 ; field1 field2 field3 field4 field5 field6 4 5 9 15:59:13 NULL cr 4 5 9 15:59:13 NULL dr 4 5 9 15:59:13 NULL er 4 5 9 15:59:13 NULL fr 4 5 9 15:59:13 NULL hr 4 5 9 15:59:13 NULL jr 4 5 9 15:59:13 NULL mr 4 5 9 15:59:13 NULL rr 4 5 9 15:59:13 NULL yr 4 11 9 19:03:19 0 NULL 4 15 9 13:12:11 0 ct 4 15 9 13:12:11 0 dt 4 15 9 13:12:11 0 et 4 15 9 13:12:11 0 ft 4 15 9 13:12:11 0 ht 4 15 9 13:12:11 0 jt 4 15 9 13:12:11 0 mt 4 15 9 13:12:11 0 rt 4 15 9 13:12:11 0 yt 4 16 9 04:56:48 1 cc 4 16 9 04:56:48 1 ec 4 16 9 04:56:48 1 fc 4 16 9 04:56:48 1 hc 4 16 9 04:56:48 1 jc 4 16 9 04:56:48 1 mc 4 16 9 04:56:48 1 rc 4 16 9 04:56:48 1 yc 4 1 9 11:28:45 2 cw 4 1 9 11:28:45 2 dw 4 1 9 11:28:45 2 ew 4 1 9 11:28:45 2 fw 4 1 9 11:28:45 2 hw 4 1 9 11:28:45 2 jw 4 1 9 11:28:45 2 mw 4 1 9 11:28:45 2 rw 4 1 9 11:28:45 2 yw 4 20 9 18:38:59 2 cd 4 20 9 18:38:59 2 dd 4 20 9 18:38:59 2 ed 4 20 9 18:38:59 2 fd 4 20 9 18:38:59 2 hd 4 20 9 18:38:59 2 jd 4 20 9 18:38:59 2 md 4 20 9 18:38:59 2 rd 4 20 9 18:38:59 2 yd 4 3 9 13:47:24 3 cm 4 3 9 13:47:24 3 dm 4 3 9 13:47:24 3 em 4 3 9 13:47:24 3 fm 4 3 9 13:47:24 3 hm 4 3 9 13:47:24 3 jm 4 3 9 13:47:24 3 mm 4 3 9 13:47:24 3 rm 4 3 9 13:47:24 3 ym 4 7 9 15:15:04 3 cj 4 7 9 15:15:04 3 dj 4 7 9 15:15:04 3 ej 4 7 9 15:15:04 3 fj 4 7 9 15:15:04 3 hj 4 7 9 15:15:04 3 jj 4 7 9 15:15:04 3 mj 4 7 9 15:15:04 3 rj 4 7 9 15:15:04 3 yj 4 14 9 00:00:00 3 cn 4 14 9 00:00:00 3 dn 4 14 9 00:00:00 3 en 4 14 9 00:00:00 3 fn 4 14 9 00:00:00 3 hn 4 14 9 00:00:00 3 jn 4 14 9 00:00:00 3 mn 4 14 9 00:00:00 3 rn 4 14 9 00:00:00 3 yn 4 12 9 00:39:46 5 ck 4 12 9 00:39:46 5 dk 4 12 9 00:39:46 5 ek 4 12 9 00:39:46 5 fk 4 12 9 00:39:46 5 hk 4 12 9 00:39:46 5 jk 4 12 9 00:39:46 5 mk 4 12 9 00:39:46 5 rk 4 12 9 00:39:46 5 yk 4 18 9 19:35:19 5 cy 4 18 9 19:35:19 5 dy 4 18 9 19:35:19 5 ey 4 18 9 19:35:19 5 fy 4 18 9 19:35:19 5 hy 4 18 9 19:35:19 5 jy 4 18 9 19:35:19 5 my 4 18 9 19:35:19 5 ry 4 18 9 19:35:19 5 yy 4 19 9 05:03:03 6 cf 4 19 9 05:03:03 6 df 4 19 9 05:03:03 6 ef 4 19 9 05:03:03 6 ff 4 19 9 05:03:03 6 hf 4 19 9 05:03:03 6 jf 4 19 9 05:03:03 6 mf 4 19 9 05:03:03 6 rf 4 19 9 05:03:03 6 yf 4 8 9 11:32:06 8 cu 4 8 9 11:32:06 8 du 4 8 9 11:32:06 8 eu 4 8 9 11:32:06 8 fu 4 8 9 11:32:06 8 hu 4 8 9 11:32:06 8 ju 4 8 9 11:32:06 8 mu 4 8 9 11:32:06 8 ru 4 8 9 11:32:06 8 yu 4 9 8 18:32:33 8 ch 4 9 8 18:32:33 8 dh 4 9 8 18:32:33 8 eh 4 9 8 18:32:33 8 fh 4 9 8 18:32:33 8 hh 4 9 8 18:32:33 8 jh 4 9 8 18:32:33 8 mh 4 9 8 18:32:33 8 rh 4 9 8 18:32:33 8 yh 4 2 9 20:25:14 9 cm 4 2 9 20:25:14 9 dm 4 2 9 20:25:14 9 em 4 2 9 20:25:14 9 fm 4 2 9 20:25:14 9 hm 4 2 9 20:25:14 9 jm 4 2 9 20:25:14 9 mm 4 2 9 20:25:14 9 rm 4 2 9 20:25:14 9 ym 4 4 9 19:24:11 9 ck 4 4 9 19:24:11 9 dk 4 4 9 19:24:11 9 ek 4 4 9 19:24:11 9 fk 4 4 9 19:24:11 9 hk 4 4 9 19:24:11 9 jk 4 4 9 19:24:11 9 mk 4 4 9 19:24:11 9 rk 4 4 9 19:24:11 9 yk 4 6 9 00:00:00 9 ct 4 6 9 00:00:00 9 dt 4 6 9 00:00:00 9 et 4 6 9 00:00:00 9 ft 4 6 9 00:00:00 9 ht 4 6 9 00:00:00 9 jt 4 6 9 00:00:00 9 mt 4 6 9 00:00:00 9 rt 4 6 9 00:00:00 9 yt 4 17 9 19:56:05 9 cm 4 17 9 19:56:05 9 dm 4 17 9 19:56:05 9 em 4 17 9 19:56:05 9 fm 4 17 9 19:56:05 9 hm 4 17 9 19:56:05 9 jm 4 17 9 19:56:05 9 mm 4 17 9 19:56:05 9 rm 4 17 9 19:56:05 9 ym 4 10 9 15:19:25 53 co 4 10 9 15:19:25 53 do 4 10 9 15:19:25 53 eo 4 10 9 15:19:25 53 fo 4 10 9 15:19:25 53 ho 4 10 9 15:19:25 53 jo 4 10 9 15:19:25 53 mo 4 10 9 15:19:25 53 ro 4 10 9 15:19:25 53 yo 4 13 9 NULL 166 ce 4 13 9 NULL 166 de 4 13 9 NULL 166 ee 4 13 9 NULL 166 fe 4 13 9 NULL 166 he 4 13 9 NULL 166 je 4 13 9 NULL 166 me 4 13 9 NULL 166 re 4 13 9 NULL 166 ye set @@optimizer_switch='subquery_cache=on'; /* cache is on */ SELECT ( SELECT 4 FROM DUAL ) AS field1 , SUM( DISTINCT table1 . `pk` ) AS field2 , ( SELECT MAX( SUBQUERY2_t1 . `col_int_nokey` ) AS SUBQUERY2_field1 FROM ( t1 AS SUBQUERY2_t1 INNER JOIN t1 AS SUBQUERY2_t2 ON (SUBQUERY2_t2 . `col_int_key` = SUBQUERY2_t1 . `pk` ) ) WHERE SUBQUERY2_t2 . `col_varchar_nokey` <= table1 . `col_varchar_key` OR SUBQUERY2_t1 . `col_int_nokey` < table1 . `pk` ) AS field3 , table1 . `col_time_key` AS field4 , table1 . `col_int_key` AS field5 , CONCAT ( table2 . `col_varchar_nokey` , table1 . `col_varchar_key` ) AS field6 FROM ( t1 AS table1 INNER JOIN ( ( t1 AS table2 LEFT JOIN t2 AS table3 ON (table3 . `col_varchar_key` = table2 . `col_varchar_key` ) ) ) ON (table3 . `col_varchar_key` = table2 . `col_varchar_nokey` ) ) WHERE ( table2 . `col_varchar_nokey` NOT IN ( SELECT 'd' UNION SELECT 'u' ) ) OR table3 . `col_varchar_nokey` <= table1 . `col_varchar_key` GROUP BY field1, field3, field4, field5, field6 ORDER BY table1 . `col_int_key` , field1, field2, field3, field4, field5, field6 ; field1 field2 field3 field4 field5 field6 4 5 9 15:59:13 NULL cr 4 5 9 15:59:13 NULL dr 4 5 9 15:59:13 NULL er 4 5 9 15:59:13 NULL fr 4 5 9 15:59:13 NULL hr 4 5 9 15:59:13 NULL jr 4 5 9 15:59:13 NULL mr 4 5 9 15:59:13 NULL rr 4 5 9 15:59:13 NULL yr 4 11 9 19:03:19 0 NULL 4 15 9 13:12:11 0 ct 4 15 9 13:12:11 0 dt 4 15 9 13:12:11 0 et 4 15 9 13:12:11 0 ft 4 15 9 13:12:11 0 ht 4 15 9 13:12:11 0 jt 4 15 9 13:12:11 0 mt 4 15 9 13:12:11 0 rt 4 15 9 13:12:11 0 yt 4 16 9 04:56:48 1 cc 4 16 9 04:56:48 1 ec 4 16 9 04:56:48 1 fc 4 16 9 04:56:48 1 hc 4 16 9 04:56:48 1 jc 4 16 9 04:56:48 1 mc 4 16 9 04:56:48 1 rc 4 16 9 04:56:48 1 yc 4 1 9 11:28:45 2 cw 4 1 9 11:28:45 2 dw 4 1 9 11:28:45 2 ew 4 1 9 11:28:45 2 fw 4 1 9 11:28:45 2 hw 4 1 9 11:28:45 2 jw 4 1 9 11:28:45 2 mw 4 1 9 11:28:45 2 rw 4 1 9 11:28:45 2 yw 4 20 9 18:38:59 2 cd 4 20 9 18:38:59 2 dd 4 20 9 18:38:59 2 ed 4 20 9 18:38:59 2 fd 4 20 9 18:38:59 2 hd 4 20 9 18:38:59 2 jd 4 20 9 18:38:59 2 md 4 20 9 18:38:59 2 rd 4 20 9 18:38:59 2 yd 4 3 9 13:47:24 3 cm 4 3 9 13:47:24 3 dm 4 3 9 13:47:24 3 em 4 3 9 13:47:24 3 fm 4 3 9 13:47:24 3 hm 4 3 9 13:47:24 3 jm 4 3 9 13:47:24 3 mm 4 3 9 13:47:24 3 rm 4 3 9 13:47:24 3 ym 4 7 9 15:15:04 3 cj 4 7 9 15:15:04 3 dj 4 7 9 15:15:04 3 ej 4 7 9 15:15:04 3 fj 4 7 9 15:15:04 3 hj 4 7 9 15:15:04 3 jj 4 7 9 15:15:04 3 mj 4 7 9 15:15:04 3 rj 4 7 9 15:15:04 3 yj 4 14 9 00:00:00 3 cn 4 14 9 00:00:00 3 dn 4 14 9 00:00:00 3 en 4 14 9 00:00:00 3 fn 4 14 9 00:00:00 3 hn 4 14 9 00:00:00 3 jn 4 14 9 00:00:00 3 mn 4 14 9 00:00:00 3 rn 4 14 9 00:00:00 3 yn 4 12 9 00:39:46 5 ck 4 12 9 00:39:46 5 dk 4 12 9 00:39:46 5 ek 4 12 9 00:39:46 5 fk 4 12 9 00:39:46 5 hk 4 12 9 00:39:46 5 jk 4 12 9 00:39:46 5 mk 4 12 9 00:39:46 5 rk 4 12 9 00:39:46 5 yk 4 18 9 19:35:19 5 cy 4 18 9 19:35:19 5 dy 4 18 9 19:35:19 5 ey 4 18 9 19:35:19 5 fy 4 18 9 19:35:19 5 hy 4 18 9 19:35:19 5 jy 4 18 9 19:35:19 5 my 4 18 9 19:35:19 5 ry 4 18 9 19:35:19 5 yy 4 19 9 05:03:03 6 cf 4 19 9 05:03:03 6 df 4 19 9 05:03:03 6 ef 4 19 9 05:03:03 6 ff 4 19 9 05:03:03 6 hf 4 19 9 05:03:03 6 jf 4 19 9 05:03:03 6 mf 4 19 9 05:03:03 6 rf 4 19 9 05:03:03 6 yf 4 8 9 11:32:06 8 cu 4 8 9 11:32:06 8 du 4 8 9 11:32:06 8 eu 4 8 9 11:32:06 8 fu 4 8 9 11:32:06 8 hu 4 8 9 11:32:06 8 ju 4 8 9 11:32:06 8 mu 4 8 9 11:32:06 8 ru 4 8 9 11:32:06 8 yu 4 9 8 18:32:33 8 ch 4 9 8 18:32:33 8 dh 4 9 8 18:32:33 8 eh 4 9 8 18:32:33 8 fh 4 9 8 18:32:33 8 hh 4 9 8 18:32:33 8 jh 4 9 8 18:32:33 8 mh 4 9 8 18:32:33 8 rh 4 9 8 18:32:33 8 yh 4 2 9 20:25:14 9 cm 4 2 9 20:25:14 9 dm 4 2 9 20:25:14 9 em 4 2 9 20:25:14 9 fm 4 2 9 20:25:14 9 hm 4 2 9 20:25:14 9 jm 4 2 9 20:25:14 9 mm 4 2 9 20:25:14 9 rm 4 2 9 20:25:14 9 ym 4 4 9 19:24:11 9 ck 4 4 9 19:24:11 9 dk 4 4 9 19:24:11 9 ek 4 4 9 19:24:11 9 fk 4 4 9 19:24:11 9 hk 4 4 9 19:24:11 9 jk 4 4 9 19:24:11 9 mk 4 4 9 19:24:11 9 rk 4 4 9 19:24:11 9 yk 4 6 9 00:00:00 9 ct 4 6 9 00:00:00 9 dt 4 6 9 00:00:00 9 et 4 6 9 00:00:00 9 ft 4 6 9 00:00:00 9 ht 4 6 9 00:00:00 9 jt 4 6 9 00:00:00 9 mt 4 6 9 00:00:00 9 rt 4 6 9 00:00:00 9 yt 4 17 9 19:56:05 9 cm 4 17 9 19:56:05 9 dm 4 17 9 19:56:05 9 em 4 17 9 19:56:05 9 fm 4 17 9 19:56:05 9 hm 4 17 9 19:56:05 9 jm 4 17 9 19:56:05 9 mm 4 17 9 19:56:05 9 rm 4 17 9 19:56:05 9 ym 4 10 9 15:19:25 53 co 4 10 9 15:19:25 53 do 4 10 9 15:19:25 53 eo 4 10 9 15:19:25 53 fo 4 10 9 15:19:25 53 ho 4 10 9 15:19:25 53 jo 4 10 9 15:19:25 53 mo 4 10 9 15:19:25 53 ro 4 10 9 15:19:25 53 yo 4 13 9 NULL 166 ce 4 13 9 NULL 166 de 4 13 9 NULL 166 ee 4 13 9 NULL 166 fe 4 13 9 NULL 166 he 4 13 9 NULL 166 je 4 13 9 NULL 166 me 4 13 9 NULL 166 re 4 13 9 NULL 166 ye drop table t1,t2; set @@optimizer_switch= default; #launchpad BUG#609045 CREATE TABLE `t1` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_date_key` date DEFAULT NULL, `col_date_nokey` date DEFAULT NULL, `col_time_key` time DEFAULT NULL, `col_time_nokey` time DEFAULT NULL, `col_datetime_key` datetime DEFAULT NULL, `col_datetime_nokey` datetime DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_int_key` (`col_int_key`), KEY `col_date_key` (`col_date_key`), KEY `col_time_key` (`col_time_key`), KEY `col_datetime_key` (`col_datetime_key`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ) ENGINE=MyISAM AUTO_INCREMENT=21 DEFAULT CHARSET=latin1; INSERT INTO `t1` VALUES (1,NULL,2,NULL,NULL,'11:28:45','11:28:45','2004-10-11 18:13:16','2004-10-11 18:13:16','w','w'); INSERT INTO `t1` VALUES (2,7,9,'2001-09-19','2001-09-19','20:25:14','20:25:14',NULL,NULL,'m','m'); INSERT INTO `t1` VALUES (3,9,3,'2004-09-12','2004-09-12','13:47:24','13:47:24','1900-01-01 00:00:00','1900-01-01 00:00:00','m','m'); INSERT INTO `t1` VALUES (4,7,9,NULL,NULL,'19:24:11','19:24:11','2009-07-25 00:00:00','2009-07-25 00:00:00','k','k'); INSERT INTO `t1` VALUES (5,4,NULL,'2002-07-19','2002-07-19','15:59:13','15:59:13',NULL,NULL,'r','r'); INSERT INTO `t1` VALUES (6,2,9,'2002-12-16','2002-12-16','00:00:00','00:00:00','2008-07-27 00:00:00','2008-07-27 00:00:00','t','t'); INSERT INTO `t1` VALUES (7,6,3,'2006-02-08','2006-02-08','15:15:04','15:15:04','2002-11-13 16:37:31','2002-11-13 16:37:31','j','j'); INSERT INTO `t1` VALUES (8,8,8,'2006-08-28','2006-08-28','11:32:06','11:32:06','1900-01-01 00:00:00','1900-01-01 00:00:00','u','u'); INSERT INTO `t1` VALUES (9,NULL,8,'2001-04-14','2001-04-14','18:32:33','18:32:33','2003-12-10 00:00:00','2003-12-10 00:00:00','h','h'); INSERT INTO `t1` VALUES (10,5,53,'2000-01-05','2000-01-05','15:19:25','15:19:25','2001-12-21 22:38:22','2001-12-21 22:38:22','o','o'); INSERT INTO `t1` VALUES (11,NULL,0,'2003-12-06','2003-12-06','19:03:19','19:03:19','2008-12-13 23:16:44','2008-12-13 23:16:44',NULL,NULL); INSERT INTO `t1` VALUES (12,6,5,'1900-01-01','1900-01-01','00:39:46','00:39:46','2005-08-15 12:39:41','2005-08-15 12:39:41','k','k'); INSERT INTO `t1` VALUES (13,188,166,'2002-11-27','2002-11-27',NULL,NULL,NULL,NULL,'e','e'); INSERT INTO `t1` VALUES (14,2,3,NULL,NULL,'00:00:00','00:00:00','2006-09-11 12:06:14','2006-09-11 12:06:14','n','n'); INSERT INTO `t1` VALUES (15,1,0,'2003-05-27','2003-05-27','13:12:11','13:12:11','2007-12-15 12:39:34','2007-12-15 12:39:34','t','t'); INSERT INTO `t1` VALUES (16,1,1,'2005-05-03','2005-05-03','04:56:48','04:56:48','2005-08-09 00:00:00','2005-08-09 00:00:00','c','c'); INSERT INTO `t1` VALUES (17,0,9,'2001-04-18','2001-04-18','19:56:05','19:56:05','2001-09-02 22:50:02','2001-09-02 22:50:02','m','m'); INSERT INTO `t1` VALUES (18,9,5,'2005-12-27','2005-12-27','19:35:19','19:35:19','2005-12-16 22:58:11','2005-12-16 22:58:11','y','y'); INSERT INTO `t1` VALUES (19,NULL,6,'2004-08-20','2004-08-20','05:03:03','05:03:03','2007-04-19 00:19:53','2007-04-19 00:19:53','f','f'); INSERT INTO `t1` VALUES (20,4,2,'1900-01-01','1900-01-01','18:38:59','18:38:59','1900-01-01 00:00:00','1900-01-01 00:00:00','d','d'); CREATE TABLE `t2` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_date_key` date DEFAULT NULL, `col_date_nokey` date DEFAULT NULL, `col_time_key` time DEFAULT NULL, `col_time_nokey` time DEFAULT NULL, `col_datetime_key` datetime DEFAULT NULL, `col_datetime_nokey` datetime DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_int_key` (`col_int_key`), KEY `col_date_key` (`col_date_key`), KEY `col_time_key` (`col_time_key`), KEY `col_datetime_key` (`col_datetime_key`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ); INSERT INTO `t2` VALUES (10,7,8,NULL,NULL,'01:27:35','01:27:35','2002-02-26 06:14:37','2002-02-26 06:14:37','v','v'); INSERT INTO `t2` VALUES (11,1,9,'2006-06-14','2006-06-14','19:48:31','19:48:31','1900-01-01 00:00:00','1900-01-01 00:00:00','r','r'); INSERT INTO `t2` VALUES (12,5,9,'2002-09-12','2002-09-12','00:00:00','00:00:00','2006-12-03 09:37:26','2006-12-03 09:37:26','a','a'); INSERT INTO `t2` VALUES (13,3,186,'2005-02-15','2005-02-15','19:53:05','19:53:05','2008-05-26 12:27:10','2008-05-26 12:27:10','m','m'); INSERT INTO `t2` VALUES (14,6,NULL,NULL,NULL,'19:18:56','19:18:56','2004-12-14 16:37:30','2004-12-14 16:37:30','y','y'); INSERT INTO `t2` VALUES (15,92,2,'2008-11-04','2008-11-04','10:55:12','10:55:12','2003-02-11 21:19:41','2003-02-11 21:19:41','j','j'); INSERT INTO `t2` VALUES (16,7,3,'2004-09-04','2004-09-04','00:25:00','00:25:00','2009-10-18 02:27:49','2009-10-18 02:27:49','d','d'); INSERT INTO `t2` VALUES (17,NULL,0,'2006-06-05','2006-06-05','12:35:47','12:35:47','2000-09-26 07:45:57','2000-09-26 07:45:57','z','z'); INSERT INTO `t2` VALUES (18,3,133,'1900-01-01','1900-01-01','19:53:03','19:53:03',NULL,NULL,'e','e'); INSERT INTO `t2` VALUES (19,5,1,'1900-01-01','1900-01-01','17:53:30','17:53:30','2005-11-10 12:40:29','2005-11-10 12:40:29','h','h'); INSERT INTO `t2` VALUES (20,1,8,'1900-01-01','1900-01-01','11:35:49','11:35:49','2009-04-25 00:00:00','2009-04-25 00:00:00','b','b'); INSERT INTO `t2` VALUES (21,2,5,'2005-01-13','2005-01-13',NULL,NULL,'2002-11-27 00:00:00','2002-11-27 00:00:00','s','s'); INSERT INTO `t2` VALUES (22,NULL,5,'2006-05-21','2006-05-21','06:01:40','06:01:40','2004-01-26 20:32:32','2004-01-26 20:32:32','e','e'); INSERT INTO `t2` VALUES (23,1,8,'2003-09-08','2003-09-08','05:45:11','05:45:11','2007-10-26 11:41:40','2007-10-26 11:41:40','j','j'); INSERT INTO `t2` VALUES (24,0,6,'2006-12-23','2006-12-23','00:00:00','00:00:00','2005-10-07 00:00:00','2005-10-07 00:00:00','e','e'); INSERT INTO `t2` VALUES (25,210,51,'2006-10-15','2006-10-15','00:00:00','00:00:00','2000-07-15 05:00:34','2000-07-15 05:00:34','f','f'); INSERT INTO `t2` VALUES (26,8,4,'2005-04-06','2005-04-06','06:11:01','06:11:01','2000-04-03 16:33:32','2000-04-03 16:33:32','v','v'); 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INSERT INTO `t4` VALUES (84,4,0,NULL,NULL,'00:25:47','00:25:47','2007-10-20 00:00:00','2007-10-20 00:00:00','w','w'); INSERT INTO `t4` VALUES (85,0,3,'2003-01-26','2003-01-26','08:44:27','08:44:27','2009-09-27 00:00:00','2009-09-27 00:00:00','f','f'); INSERT INTO `t4` VALUES (86,0,1,'2001-12-19','2001-12-19','08:15:38','08:15:38','2002-07-16 00:00:00','2002-07-16 00:00:00','k','k'); INSERT INTO `t4` VALUES (87,1,1,'2001-08-07','2001-08-07','19:56:21','19:56:21','2005-02-20 00:00:00','2005-02-20 00:00:00','v','v'); INSERT INTO `t4` VALUES (88,119,147,'2005-02-16','2005-02-16','00:00:00','00:00:00',NULL,NULL,'c','c'); INSERT INTO `t4` VALUES (89,1,3,'2006-06-10','2006-06-10','20:50:52','20:50:52','2001-07-16 00:00:00','2001-07-16 00:00:00','y','y'); INSERT INTO `t4` VALUES (90,7,3,NULL,NULL,'03:54:39','03:54:39','2009-05-20 21:04:12','2009-05-20 21:04:12','h','h'); INSERT INTO `t4` VALUES (91,2,NULL,'2005-04-06','2005-04-06','23:58:17','23:58:17','2002-03-13 10:55:40','2002-03-13 10:55:40',NULL,NULL); INSERT INTO `t4` VALUES (92,7,2,'2003-04-27','2003-04-27','12:54:58','12:54:58','2005-07-12 00:00:00','2005-07-12 00:00:00','t','t'); INSERT INTO `t4` VALUES (93,2,1,'2005-10-13','2005-10-13','04:02:43','04:02:43','2006-07-22 09:46:34','2006-07-22 09:46:34','l','l'); INSERT INTO `t4` VALUES (94,6,8,'2003-10-02','2003-10-02','11:31:12','11:31:12','2001-09-01 00:00:00','2001-09-01 00:00:00','a','a'); INSERT INTO `t4` VALUES (95,4,8,'2005-09-09','2005-09-09','20:20:04','20:20:04','2002-05-27 18:38:45','2002-05-27 18:38:45','r','r'); INSERT INTO `t4` VALUES (96,5,8,NULL,NULL,'00:22:24','00:22:24',NULL,NULL,'s','s'); INSERT INTO `t4` VALUES (97,7,0,'2006-02-15','2006-02-15','10:09:31','10:09:31',NULL,NULL,'z','z'); INSERT INTO `t4` VALUES (98,1,1,'1900-01-01','1900-01-01',NULL,NULL,'2009-08-08 22:38:53','2009-08-08 22:38:53','j','j'); INSERT INTO `t4` VALUES (99,7,8,'2003-12-24','2003-12-24','18:45:35','18:45:35',NULL,NULL,'c','c'); INSERT INTO `t4` VALUES (100,2,5,'2001-07-26','2001-07-26','11:49:25','11:49:25','2007-04-25 05:08:49','2007-04-25 05:08:49','f','f'); SET @@optimizer_switch='subquery_cache=off'; /* cache is off */ SELECT COUNT( DISTINCT table2 .`col_int_key` ) , ( SELECT SUBQUERY2_t1 .`col_int_key` FROM t3 SUBQUERY2_t1 JOIN t2 ON SUBQUERY2_t1 .`col_int_key` WHERE table1 .`col_varchar_key` ) , table2 .`col_varchar_nokey` field10 FROM t4 table1 JOIN ( t1 table2 STRAIGHT_JOIN t1 table3 ON table2 .`pk` ) ON table3 .`col_varchar_key` = table2 .`col_varchar_key` GROUP BY field10 ; COUNT( DISTINCT table2 .`col_int_key` ) ( SELECT SUBQUERY2_t1 .`col_int_key` FROM t3 SUBQUERY2_t1 JOIN t2 ON SUBQUERY2_t1 .`col_int_key` WHERE table1 .`col_varchar_key` ) field10 1 NULL c 1 NULL d 1 NULL e 1 NULL f 1 NULL h 1 NULL j 2 NULL k 2 NULL m 1 NULL n 1 NULL o 0 NULL r 2 NULL t 1 NULL u 1 NULL w 1 NULL y Warnings: Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'o' Warning 1292 Truncated incorrect DOUBLE value: 'o' Warning 1292 Truncated incorrect DOUBLE value: 'o' Warning 1292 Truncated incorrect DOUBLE value: 'o' Warning 1292 Truncated incorrect DOUBLE value: 'o' Warning 1292 Truncated incorrect DOUBLE value: 'o' SET @@optimizer_switch='subquery_cache=on'; /* cache is on */ SELECT COUNT( DISTINCT table2 .`col_int_key` ) , ( SELECT SUBQUERY2_t1 .`col_int_key` FROM t3 SUBQUERY2_t1 JOIN t2 ON SUBQUERY2_t1 .`col_int_key` WHERE table1 .`col_varchar_key` ) , table2 .`col_varchar_nokey` field10 FROM t4 table1 JOIN ( t1 table2 STRAIGHT_JOIN t1 table3 ON table2 .`pk` ) ON table3 .`col_varchar_key` = table2 .`col_varchar_key` GROUP BY field10 ; COUNT( DISTINCT table2 .`col_int_key` ) ( SELECT SUBQUERY2_t1 .`col_int_key` FROM t3 SUBQUERY2_t1 JOIN t2 ON SUBQUERY2_t1 .`col_int_key` WHERE table1 .`col_varchar_key` ) field10 1 NULL c 1 NULL d 1 NULL e 1 NULL f 1 NULL h 1 NULL j 2 NULL k 2 NULL m 1 NULL n 1 NULL o 0 NULL r 2 NULL t 1 NULL u 1 NULL w 1 NULL y Warnings: Warning 1292 Truncated incorrect DOUBLE value: 'r' Warning 1292 Truncated incorrect DOUBLE value: 'c' Warning 1292 Truncated incorrect DOUBLE value: 'o' Warning 1292 Truncated incorrect DOUBLE value: 'd' Warning 1292 Truncated incorrect DOUBLE value: 'v' Warning 1292 Truncated incorrect DOUBLE value: 'm' Warning 1292 Truncated incorrect DOUBLE value: 'j' Warning 1292 Truncated incorrect DOUBLE value: 'f' Warning 1292 Truncated incorrect DOUBLE value: 'n' Warning 1292 Truncated incorrect DOUBLE value: 'z' Warning 1292 Truncated incorrect DOUBLE value: 'h' Warning 1292 Truncated incorrect DOUBLE value: 'q' Warning 1292 Truncated incorrect DOUBLE value: 'w' Warning 1292 Truncated incorrect DOUBLE value: 'a' Warning 1292 Truncated incorrect DOUBLE value: 'e' Warning 1292 Truncated incorrect DOUBLE value: 'u' Warning 1292 Truncated incorrect DOUBLE value: 's' Warning 1292 Truncated incorrect DOUBLE value: 'g' Warning 1292 Truncated incorrect DOUBLE value: 'b' Warning 1292 Truncated incorrect DOUBLE value: 'y' Warning 1292 Truncated incorrect DOUBLE value: 'p' Warning 1292 Truncated incorrect DOUBLE value: 't' Warning 1292 Truncated incorrect DOUBLE value: 'x' Warning 1292 Truncated incorrect DOUBLE value: 'l' Warning 1292 Truncated incorrect DOUBLE value: 'k' Warning 1292 Truncated incorrect DOUBLE value: 'i' drop table t1,t2,t3,t4; set @@optimizer_switch= default; #launchpad BUG#609045 CREATE TABLE `t2` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_int_key` (`col_int_key`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ) ENGINE=MyISAM AUTO_INCREMENT=30 DEFAULT CHARSET=latin1; INSERT INTO `t2` VALUES (10,7,8,'v','v'); INSERT INTO `t2` VALUES (11,1,9,'r','r'); INSERT INTO `t2` VALUES (12,5,9,'a','a'); INSERT INTO `t2` VALUES (13,3,186,'m','m'); INSERT INTO `t2` VALUES (14,6,NULL,'y','y'); INSERT INTO `t2` VALUES (15,92,2,'j','j'); INSERT INTO `t2` VALUES (16,7,3,'d','d'); INSERT INTO `t2` VALUES (17,NULL,0,'z','z'); INSERT INTO `t2` VALUES (18,3,133,'e','e'); INSERT INTO `t2` VALUES (19,5,1,'h','h'); INSERT INTO `t2` VALUES (20,1,8,'b','b'); INSERT INTO `t2` VALUES (21,2,5,'s','s'); INSERT INTO `t2` VALUES (22,NULL,5,'e','e'); INSERT INTO `t2` VALUES (23,1,8,'j','j'); INSERT INTO `t2` VALUES (24,0,6,'e','e'); INSERT INTO `t2` VALUES (25,210,51,'f','f'); INSERT INTO `t2` VALUES (26,8,4,'v','v'); INSERT INTO `t2` VALUES (27,7,7,'x','x'); INSERT INTO `t2` VALUES (28,5,6,'m','m'); INSERT INTO `t2` VALUES (29,NULL,4,'c','c'); CREATE TABLE `t1` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_int_key` (`col_int_key`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ) ENGINE=MyISAM AUTO_INCREMENT=21 DEFAULT CHARSET=latin1; INSERT INTO `t1` VALUES (1,NULL,2,'w','w'); INSERT INTO `t1` VALUES (2,7,9,'m','m'); INSERT INTO `t1` VALUES (3,9,3,'m','m'); INSERT INTO `t1` VALUES (4,7,9,'k','k'); INSERT INTO `t1` VALUES (5,4,NULL,'r','r'); INSERT INTO `t1` VALUES (6,2,9,'t','t'); INSERT INTO `t1` VALUES (7,6,3,'j','j'); INSERT INTO `t1` VALUES (8,8,8,'u','u'); INSERT INTO `t1` VALUES (9,NULL,8,'h','h'); INSERT INTO `t1` VALUES (10,5,53,'o','o'); INSERT INTO `t1` VALUES (11,NULL,0,NULL,NULL); INSERT INTO `t1` VALUES (12,6,5,'k','k'); INSERT INTO `t1` VALUES (13,188,166,'e','e'); INSERT INTO `t1` VALUES (14,2,3,'n','n'); INSERT INTO `t1` VALUES (15,1,0,'t','t'); INSERT INTO `t1` VALUES (16,1,1,'c','c'); INSERT INTO `t1` VALUES (17,0,9,'m','m'); INSERT INTO `t1` VALUES (18,9,5,'y','y'); INSERT INTO `t1` VALUES (19,NULL,6,'f','f'); INSERT INTO `t1` VALUES (20,4,2,'d','d'); SET @@optimizer_switch = 'subquery_cache=off'; /* cache is off */ SELECT SUM( DISTINCT table1 .`pk` ) , ( SELECT MAX( `col_int_nokey` ) FROM t1 WHERE table1 .`pk` ) field3 FROM t1 table1 JOIN ( t1 table2 JOIN t2 table3 ON table3 .`col_varchar_key` = table2 .`col_varchar_key` ) ON table3 .`col_varchar_key` = table2 .`col_varchar_nokey` GROUP BY field3 ; SUM( DISTINCT table1 .`pk` ) field3 210 188 SET @@optimizer_switch = 'subquery_cache=on'; /* cache is on */ SELECT SUM( DISTINCT table1 .`pk` ) , ( SELECT MAX( `col_int_nokey` ) FROM t1 WHERE table1 .`pk` ) field3 FROM t1 table1 JOIN ( t1 table2 JOIN t2 table3 ON table3 .`col_varchar_key` = table2 .`col_varchar_key` ) ON table3 .`col_varchar_key` = table2 .`col_varchar_nokey` GROUP BY field3 ; SUM( DISTINCT table1 .`pk` ) field3 210 188 drop table t1,t2; set @@optimizer_switch= default; #launchpad BUG#609052 CREATE TABLE `t2` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_time_key` time DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_int_key` (`col_int_key`), KEY `col_time_key` (`col_time_key`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ) ENGINE=MyISAM AUTO_INCREMENT=30 DEFAULT CHARSET=latin1; INSERT INTO `t2` VALUES (10,7,8,'01:27:35','v','v'); INSERT INTO `t2` VALUES (11,1,9,'19:48:31','r','r'); INSERT INTO `t2` VALUES (12,5,9,'00:00:00','a','a'); INSERT INTO `t2` VALUES (13,3,186,'19:53:05','m','m'); INSERT INTO `t2` VALUES (14,6,NULL,'19:18:56','y','y'); INSERT INTO `t2` VALUES (15,92,2,'10:55:12','j','j'); INSERT INTO `t2` VALUES (16,7,3,'00:25:00','d','d'); INSERT INTO `t2` VALUES (17,NULL,0,'12:35:47','z','z'); INSERT INTO `t2` VALUES (18,3,133,'19:53:03','e','e'); INSERT INTO `t2` VALUES (19,5,1,'17:53:30','h','h'); INSERT INTO `t2` VALUES (20,1,8,'11:35:49','b','b'); INSERT INTO `t2` VALUES (21,2,5,NULL,'s','s'); INSERT INTO `t2` VALUES (22,NULL,5,'06:01:40','e','e'); INSERT INTO `t2` VALUES (23,1,8,'05:45:11','j','j'); INSERT INTO `t2` VALUES (24,0,6,'00:00:00','e','e'); INSERT INTO `t2` VALUES (25,210,51,'00:00:00','f','f'); INSERT INTO `t2` VALUES (26,8,4,'06:11:01','v','v'); INSERT INTO `t2` VALUES (27,7,7,'13:02:46','x','x'); INSERT INTO `t2` VALUES (28,5,6,'21:44:25','m','m'); INSERT INTO `t2` VALUES (29,NULL,4,'22:43:58','c','c'); CREATE TABLE `t4` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_time_key` time DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_int_key` (`col_int_key`), KEY `col_time_key` (`col_time_key`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ) ENGINE=MyISAM AUTO_INCREMENT=101 DEFAULT CHARSET=latin1; INSERT INTO `t4` VALUES (1,6,NULL,NULL,'r','r'); INSERT INTO `t4` VALUES (2,8,0,'14:34:45','c','c'); INSERT INTO `t4` VALUES (3,6,0,'11:49:48','o','o'); INSERT INTO `t4` VALUES (4,6,7,'18:12:55','c','c'); INSERT INTO `t4` VALUES (5,3,8,'18:30:05','d','d'); INSERT INTO `t4` VALUES (6,9,4,'14:19:30','v','v'); INSERT INTO `t4` VALUES (7,2,6,'05:20:04','m','m'); INSERT INTO `t4` VALUES (8,1,5,'20:29:31','j','j'); INSERT INTO `t4` VALUES (9,8,NULL,'07:08:09','f','f'); INSERT INTO `t4` VALUES (10,0,NULL,'14:49:14','n','n'); INSERT INTO `t4` VALUES (11,9,8,'00:00:00','z','z'); INSERT INTO `t4` VALUES (12,8,8,'09:58:06','h','h'); INSERT INTO `t4` VALUES (13,NULL,8,NULL,'q','q'); INSERT INTO `t4` VALUES (14,0,1,'18:24:16','w','w'); INSERT INTO `t4` VALUES (15,5,1,'17:39:57','z','z'); INSERT INTO `t4` VALUES (16,1,5,'08:23:21','j','j'); INSERT INTO `t4` VALUES (17,1,2,NULL,'a','a'); INSERT INTO `t4` VALUES (18,6,7,'21:50:46','m','m'); INSERT INTO `t4` VALUES (19,6,6,'12:33:17','n','n'); INSERT INTO `t4` VALUES (20,1,4,'03:06:43','e','e'); INSERT INTO `t4` VALUES (21,8,7,'03:46:14','u','u'); INSERT INTO `t4` VALUES (22,1,0,'20:34:52','s','s'); INSERT INTO `t4` VALUES (23,0,9,NULL,'u','u'); INSERT INTO `t4` VALUES (24,4,3,'10:41:20','r','r'); INSERT INTO `t4` VALUES (25,9,5,'08:43:11','g','g'); INSERT INTO `t4` VALUES (26,8,1,NULL,'o','o'); INSERT INTO `t4` VALUES (27,5,1,'10:17:51','w','w'); INSERT INTO `t4` VALUES (28,9,5,'06:34:09','b','b'); INSERT INTO `t4` VALUES (29,5,9,'21:22:47',NULL,NULL); INSERT INTO `t4` VALUES (30,NULL,2,'04:02:32','y','y'); INSERT INTO `t4` VALUES (31,NULL,5,'02:33:14','y','y'); INSERT INTO `t4` VALUES (32,105,248,'16:32:56','u','u'); INSERT INTO `t4` VALUES (33,0,0,'21:32:42','p','p'); INSERT INTO `t4` VALUES (34,3,8,'23:04:47','s','s'); INSERT INTO `t4` VALUES (35,1,1,'22:05:43','e','e'); INSERT INTO `t4` VALUES (36,75,255,'02:05:45','d','d'); INSERT INTO `t4` VALUES (37,9,9,'00:00:00','d','d'); INSERT INTO `t4` VALUES (38,7,9,'18:09:07','c','c'); INSERT INTO `t4` VALUES (39,NULL,3,'10:54:06','b','b'); INSERT INTO `t4` VALUES (40,NULL,9,'23:15:50','t','t'); INSERT INTO `t4` VALUES (41,4,6,'10:17:40',NULL,NULL); INSERT INTO `t4` VALUES (42,0,4,'03:37:09','y','y'); INSERT INTO `t4` VALUES (43,204,60,'22:26:06','c','c'); INSERT INTO `t4` VALUES (44,0,7,'17:10:38','d','d'); INSERT INTO `t4` VALUES (45,9,1,'00:00:00','x','x'); INSERT INTO `t4` VALUES (46,8,6,'17:08:49','p','p'); INSERT INTO `t4` VALUES (47,7,4,'19:04:40','e','e'); INSERT INTO `t4` VALUES (48,8,NULL,'20:53:28','g','g'); INSERT INTO `t4` VALUES (49,NULL,8,'11:46:03','x','x'); INSERT INTO `t4` VALUES (50,6,0,NULL,'s','s'); INSERT INTO `t4` VALUES (51,5,8,'10:58:07','e','e'); INSERT INTO `t4` VALUES (52,2,151,'00:00:00','l','l'); INSERT INTO `t4` VALUES (53,3,7,'09:43:15','p','p'); INSERT INTO `t4` VALUES (54,7,6,'21:40:32','h','h'); INSERT INTO `t4` VALUES (55,NULL,NULL,'00:17:44','m','m'); INSERT INTO `t4` VALUES (56,145,23,'16:47:26','n','n'); INSERT INTO `t4` VALUES (57,0,2,'00:00:00','v','v'); INSERT INTO `t4` VALUES (58,1,4,'05:25:59','b','b'); INSERT INTO `t4` VALUES (59,7,NULL,'00:00:00','x','x'); INSERT INTO `t4` VALUES (60,3,NULL,'20:33:04','r','r'); INSERT INTO `t4` VALUES (61,NULL,77,'00:46:12','t','t'); INSERT INTO `t4` VALUES (62,2,NULL,'00:00:00','w','w'); INSERT INTO `t4` VALUES (63,2,NULL,'02:13:59','w','w'); INSERT INTO `t4` VALUES (64,2,7,'02:54:47','k','k'); INSERT INTO `t4` VALUES (65,8,1,'18:13:59','a','a'); INSERT INTO `t4` VALUES (66,6,9,'13:53:08','t','t'); INSERT INTO `t4` VALUES (67,1,6,'22:21:30','z','z'); INSERT INTO `t4` VALUES (68,NULL,2,'11:41:50','e','e'); INSERT INTO `t4` VALUES (69,1,3,'15:20:02','q','q'); INSERT INTO `t4` VALUES (70,0,0,NULL,'e','e'); INSERT INTO `t4` VALUES (71,4,NULL,NULL,'v','v'); INSERT INTO `t4` VALUES (72,1,6,'07:51:52','d','d'); INSERT INTO `t4` VALUES (73,1,3,'00:00:00','u','u'); INSERT INTO `t4` VALUES (74,27,195,NULL,'o','o'); INSERT INTO `t4` VALUES (75,4,5,NULL,'b','b'); INSERT INTO `t4` VALUES (76,6,2,'12:31:05','c','c'); INSERT INTO `t4` VALUES (77,2,7,'00:00:00','q','q'); INSERT INTO `t4` VALUES (78,248,25,'01:16:45',NULL,NULL); INSERT INTO `t4` VALUES (79,NULL,NULL,'20:38:54','h','h'); INSERT INTO `t4` VALUES (80,9,0,'00:30:15','d','d'); INSERT INTO `t4` VALUES (81,75,98,'23:46:36','w','w'); INSERT INTO `t4` VALUES (82,2,6,'19:03:13','m','m'); INSERT INTO `t4` VALUES (83,9,5,'10:54:27','i','i'); INSERT INTO `t4` VALUES (84,4,0,'00:25:47','w','w'); INSERT INTO `t4` VALUES (85,0,3,'08:44:27','f','f'); INSERT INTO `t4` VALUES (86,0,1,'08:15:38','k','k'); INSERT INTO `t4` VALUES (87,1,1,'19:56:21','v','v'); INSERT INTO `t4` VALUES (88,119,147,'00:00:00','c','c'); INSERT INTO `t4` VALUES (89,1,3,'20:50:52','y','y'); INSERT INTO `t4` VALUES (90,7,3,'03:54:39','h','h'); INSERT INTO `t4` VALUES (91,2,NULL,'23:58:17',NULL,NULL); INSERT INTO `t4` VALUES (92,7,2,'12:54:58','t','t'); INSERT INTO `t4` VALUES (93,2,1,'04:02:43','l','l'); INSERT INTO `t4` VALUES (94,6,8,'11:31:12','a','a'); INSERT INTO `t4` VALUES (95,4,8,'20:20:04','r','r'); INSERT INTO `t4` VALUES (96,5,8,'00:22:24','s','s'); INSERT INTO `t4` VALUES (97,7,0,'10:09:31','z','z'); INSERT INTO `t4` VALUES (98,1,1,NULL,'j','j'); INSERT INTO `t4` VALUES (99,7,8,'18:45:35','c','c'); INSERT INTO `t4` VALUES (100,2,5,'11:49:25','f','f'); CREATE TABLE `t1` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_time_key` time DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_int_key` (`col_int_key`), KEY `col_time_key` (`col_time_key`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ) ENGINE=MyISAM AUTO_INCREMENT=21 DEFAULT CHARSET=latin1; INSERT INTO `t1` VALUES (1,NULL,2,'11:28:45','w','w'); INSERT INTO `t1` VALUES (2,7,9,'20:25:14','m','m'); INSERT INTO `t1` VALUES (3,9,3,'13:47:24','m','m'); INSERT INTO `t1` VALUES (4,7,9,'19:24:11','k','k'); INSERT INTO `t1` VALUES (5,4,NULL,'15:59:13','r','r'); INSERT INTO `t1` VALUES (6,2,9,'00:00:00','t','t'); INSERT INTO `t1` VALUES (7,6,3,'15:15:04','j','j'); INSERT INTO `t1` VALUES (8,8,8,'11:32:06','u','u'); INSERT INTO `t1` VALUES (9,NULL,8,'18:32:33','h','h'); INSERT INTO `t1` VALUES (10,5,53,'15:19:25','o','o'); INSERT INTO `t1` VALUES (11,NULL,0,'19:03:19',NULL,NULL); INSERT INTO `t1` VALUES (12,6,5,'00:39:46','k','k'); INSERT INTO `t1` VALUES (13,188,166,NULL,'e','e'); INSERT INTO `t1` VALUES (14,2,3,'00:00:00','n','n'); INSERT INTO `t1` VALUES (15,1,0,'13:12:11','t','t'); INSERT INTO `t1` VALUES (16,1,1,'04:56:48','c','c'); INSERT INTO `t1` VALUES (17,0,9,'19:56:05','m','m'); INSERT INTO `t1` VALUES (18,9,5,'19:35:19','y','y'); INSERT INTO `t1` VALUES (19,NULL,6,'05:03:03','f','f'); INSERT INTO `t1` VALUES (20,4,2,'18:38:59','d','d'); CREATE TABLE `t3` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_time_key` time DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_int_key` (`col_int_key`), KEY `col_time_key` (`col_time_key`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ) ENGINE=MyISAM AUTO_INCREMENT=11 DEFAULT CHARSET=latin1; INSERT INTO `t3` VALUES (10,8,8,'18:27:58',NULL,NULL); CREATE TABLE `t5` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_time_key` time DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_int_key` (`col_int_key`), KEY `col_time_key` (`col_time_key`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ) ENGINE=MyISAM AUTO_INCREMENT=2 DEFAULT CHARSET=latin1; INSERT INTO `t5` VALUES (1,1,7,'01:13:38','f','f'); SET @@optimizer_switch='subquery_cache=off'; /* cache is off */ SELECT SQL_SMALL_RESULT MAX( DISTINCT table1 . `col_varchar_key` ) AS field1 , MIN( table1 . `col_varchar_nokey` ) AS field2 , COUNT( table1 . `col_varchar_key` ) AS field3 , table2 . `col_time_key` AS field4 , COUNT( DISTINCT table2 . `col_int_key` ) AS field5 , ( SELECT MAX( SUBQUERY1_t2 . `col_int_nokey` ) AS SUBQUERY1_field1 FROM ( t3 AS SUBQUERY1_t1 INNER JOIN t1 AS SUBQUERY1_t2 ON (SUBQUERY1_t2 . `col_varchar_key` = SUBQUERY1_t1 . `col_varchar_nokey` ) ) WHERE SUBQUERY1_t2 . `pk` < SUBQUERY1_t2 . `pk` ) AS field6 , COUNT( table1 . `col_varchar_nokey` ) AS field7 , COUNT( table2 . `pk` ) AS field8 , ( SELECT MAX( SUBQUERY2_t1 . `col_int_key` ) AS SUBQUERY2_field1 FROM ( t5 AS SUBQUERY2_t1 LEFT JOIN t2 AS SUBQUERY2_t2 ON (SUBQUERY2_t2 . `col_int_key` = SUBQUERY2_t1 . `col_int_key` ) ) WHERE SUBQUERY2_t2 . `col_varchar_nokey` != table1 . `col_varchar_key` OR SUBQUERY2_t1 . `col_varchar_nokey` >= 'o' ) AS field9 , CONCAT ( table1 . `col_varchar_key` , table2 . `col_varchar_nokey` ) AS field10 FROM ( t4 AS table1 LEFT JOIN ( ( t1 AS table2 STRAIGHT_JOIN t1 AS table3 ON (table3 . `col_int_nokey` = table2 . `pk` ) ) ) ON (table3 . `col_varchar_key` = table2 . `col_varchar_key` ) ) WHERE ( EXISTS ( SELECT SUBQUERY3_t1 . `pk` AS SUBQUERY3_field1 FROM ( t4 AS SUBQUERY3_t1 INNER JOIN t4 AS SUBQUERY3_t2 ON (SUBQUERY3_t2 . `col_varchar_key` = SUBQUERY3_t1 . `col_varchar_key` ) ) WHERE SUBQUERY3_t1 . `col_int_key` > table3 . `pk` AND SUBQUERY3_t1 . `pk` != table3 . `pk` ) ) AND ( table1 . `pk` > 116 AND table1 . `pk` < ( 116 + 175 ) OR table1 . `pk` IN (251) ) OR table1 . `col_int_nokey` = table1 . `col_int_nokey` GROUP BY field4, field6, field9, field10 HAVING field10 = 'c' ; field1 field2 field3 field4 field5 field6 field7 field8 field9 field10 SET @@optimizer_switch='subquery_cache=on'; /* cache is on */ SELECT SQL_SMALL_RESULT MAX( DISTINCT table1 . `col_varchar_key` ) AS field1 , MIN( table1 . `col_varchar_nokey` ) AS field2 , COUNT( table1 . `col_varchar_key` ) AS field3 , table2 . `col_time_key` AS field4 , COUNT( DISTINCT table2 . `col_int_key` ) AS field5 , ( SELECT MAX( SUBQUERY1_t2 . `col_int_nokey` ) AS SUBQUERY1_field1 FROM ( t3 AS SUBQUERY1_t1 INNER JOIN t1 AS SUBQUERY1_t2 ON (SUBQUERY1_t2 . `col_varchar_key` = SUBQUERY1_t1 . `col_varchar_nokey` ) ) WHERE SUBQUERY1_t2 . `pk` < SUBQUERY1_t2 . `pk` ) AS field6 , COUNT( table1 . `col_varchar_nokey` ) AS field7 , COUNT( table2 . `pk` ) AS field8 , ( SELECT MAX( SUBQUERY2_t1 . `col_int_key` ) AS SUBQUERY2_field1 FROM ( t5 AS SUBQUERY2_t1 LEFT JOIN t2 AS SUBQUERY2_t2 ON (SUBQUERY2_t2 . `col_int_key` = SUBQUERY2_t1 . `col_int_key` ) ) WHERE SUBQUERY2_t2 . `col_varchar_nokey` != table1 . `col_varchar_key` OR SUBQUERY2_t1 . `col_varchar_nokey` >= 'o' ) AS field9 , CONCAT ( table1 . `col_varchar_key` , table2 . `col_varchar_nokey` ) AS field10 FROM ( t4 AS table1 LEFT JOIN ( ( t1 AS table2 STRAIGHT_JOIN t1 AS table3 ON (table3 . `col_int_nokey` = table2 . `pk` ) ) ) ON (table3 . `col_varchar_key` = table2 . `col_varchar_key` ) ) WHERE ( EXISTS ( SELECT SUBQUERY3_t1 . `pk` AS SUBQUERY3_field1 FROM ( t4 AS SUBQUERY3_t1 INNER JOIN t4 AS SUBQUERY3_t2 ON (SUBQUERY3_t2 . `col_varchar_key` = SUBQUERY3_t1 . `col_varchar_key` ) ) WHERE SUBQUERY3_t1 . `col_int_key` > table3 . `pk` AND SUBQUERY3_t1 . `pk` != table3 . `pk` ) ) AND ( table1 . `pk` > 116 AND table1 . `pk` < ( 116 + 175 ) OR table1 . `pk` IN (251) ) OR table1 . `col_int_nokey` = table1 . `col_int_nokey` GROUP BY field4, field6, field9, field10 HAVING field10 = 'c' ; field1 field2 field3 field4 field5 field6 field7 field8 field9 field10 drop table t1,t2,t3,t4,t5; set @@optimizer_switch= default; #launchpad BUG#609043 CREATE TABLE `t1` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_date_key` date DEFAULT NULL, `col_date_nokey` date DEFAULT NULL, `col_time_key` time DEFAULT NULL, `col_time_nokey` time DEFAULT NULL, `col_datetime_key` datetime DEFAULT NULL, `col_datetime_nokey` datetime DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ) ENGINE=MyISAM AUTO_INCREMENT=21 DEFAULT CHARSET=latin1; INSERT INTO `t1` VALUES (19,NULL,6,'2004-08-20','2004-08-20','05:03:03','05:03:03','2007-04-19 00:19:53','2007-04-19 00:19:53','f','f'); INSERT INTO `t1` VALUES (20,4,2,'1900-01-01','1900-01-01','18:38:59','18:38:59','1900-01-01 00:00:00','1900-01-01 00:00:00','d','d'); CREATE TABLE `t2` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_date_key` date DEFAULT NULL, `col_date_nokey` date DEFAULT NULL, `col_time_key` time DEFAULT NULL, `col_time_nokey` time DEFAULT NULL, `col_datetime_key` datetime DEFAULT NULL, `col_datetime_nokey` datetime DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_int_key` (`col_int_key`), KEY `col_date_key` (`col_date_key`), KEY `col_time_key` (`col_time_key`), KEY `col_datetime_key` (`col_datetime_key`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ) ENGINE=MyISAM AUTO_INCREMENT=30 DEFAULT CHARSET=latin1; CREATE TABLE `t3` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_date_key` date DEFAULT NULL, `col_date_nokey` date DEFAULT NULL, `col_time_key` time DEFAULT NULL, `col_time_nokey` time DEFAULT NULL, `col_datetime_key` datetime DEFAULT NULL, `col_datetime_nokey` datetime DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_int_key` (`col_int_key`), KEY `col_date_key` (`col_date_key`), KEY `col_time_key` (`col_time_key`), KEY `col_datetime_key` (`col_datetime_key`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ) ENGINE=MyISAM AUTO_INCREMENT=2 DEFAULT CHARSET=latin1; CREATE TABLE `t4` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_date_key` date DEFAULT NULL, `col_date_nokey` date DEFAULT NULL, `col_time_key` time DEFAULT NULL, `col_time_nokey` time DEFAULT NULL, `col_datetime_key` datetime DEFAULT NULL, `col_datetime_nokey` datetime DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_int_key` (`col_int_key`), KEY `col_date_key` (`col_date_key`), KEY `col_time_key` (`col_time_key`), KEY `col_datetime_key` (`col_datetime_key`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ) ENGINE=MyISAM AUTO_INCREMENT=101 DEFAULT CHARSET=latin1; INSERT INTO `t4` VALUES (100,2,5,'2001-07-26','2001-07-26','11:49:25','11:49:25','2007-04-25 05:08:49','2007-04-25 05:08:49','f','f'); SET @@optimizer_switch = 'subquery_cache=off'; /* cache is off */ SELECT COUNT( DISTINCT table2 .`col_int_key` ) , ( SELECT SUBQUERY2_t1 .`col_int_key` FROM t3 SUBQUERY2_t1 JOIN t2 ON SUBQUERY2_t1 .`col_int_key` WHERE table1 .`col_varchar_key` ) , table2 .`col_varchar_nokey` field10 FROM t4 table1 JOIN ( t1 table2 STRAIGHT_JOIN t1 table3 ON table2 .`pk` ) ON table3 .`col_varchar_key` = table2 .`col_varchar_key` GROUP BY field10 ; COUNT( DISTINCT table2 .`col_int_key` ) ( SELECT SUBQUERY2_t1 .`col_int_key` FROM t3 SUBQUERY2_t1 JOIN t2 ON SUBQUERY2_t1 .`col_int_key` WHERE table1 .`col_varchar_key` ) field10 1 NULL d 1 NULL f Warnings: Warning 1292 Truncated incorrect DOUBLE value: 'f' Warning 1292 Truncated incorrect DOUBLE value: 'f' SET @@optimizer_switch = 'subquery_cache=on'; /* cache is on */ SELECT COUNT( DISTINCT table2 .`col_int_key` ) , ( SELECT SUBQUERY2_t1 .`col_int_key` FROM t3 SUBQUERY2_t1 JOIN t2 ON SUBQUERY2_t1 .`col_int_key` WHERE table1 .`col_varchar_key` ) , table2 .`col_varchar_nokey` field10 FROM t4 table1 JOIN ( t1 table2 STRAIGHT_JOIN t1 table3 ON table2 .`pk` ) ON table3 .`col_varchar_key` = table2 .`col_varchar_key` GROUP BY field10 ; COUNT( DISTINCT table2 .`col_int_key` ) ( SELECT SUBQUERY2_t1 .`col_int_key` FROM t3 SUBQUERY2_t1 JOIN t2 ON SUBQUERY2_t1 .`col_int_key` WHERE table1 .`col_varchar_key` ) field10 1 NULL d 1 NULL f Warnings: Warning 1292 Truncated incorrect DOUBLE value: 'f' Warning 1292 Truncated incorrect DOUBLE value: 'f' drop table t1,t2,t3,t4; set @@optimizer_switch= default; #launchpad BUG#611625 CREATE TABLE `t1` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`) ) ENGINE=MyISAM AUTO_INCREMENT=21 DEFAULT CHARSET=latin1; INSERT INTO `t1` VALUES (1,NULL,'w'); INSERT INTO `t1` VALUES (2,7,'m'); INSERT INTO `t1` VALUES (3,9,'m'); INSERT INTO `t1` VALUES (4,7,'k'); INSERT INTO `t1` VALUES (5,4,'r'); INSERT INTO `t1` VALUES (6,2,'t'); INSERT INTO `t1` VALUES (7,6,'j'); INSERT INTO `t1` VALUES (8,8,'u'); INSERT INTO `t1` VALUES (9,NULL,'h'); INSERT INTO `t1` VALUES (10,5,'o'); INSERT INTO `t1` VALUES (11,NULL,NULL); INSERT INTO `t1` VALUES (12,6,'k'); INSERT INTO `t1` VALUES (13,188,'e'); INSERT INTO `t1` VALUES (14,2,'n'); INSERT INTO `t1` VALUES (15,1,'t'); INSERT INTO `t1` VALUES (16,1,'c'); INSERT INTO `t1` VALUES (17,0,'m'); INSERT INTO `t1` VALUES (18,9,'y'); INSERT INTO `t1` VALUES (19,NULL,'f'); INSERT INTO `t1` VALUES (20,4,'d'); CREATE TABLE `t3` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`) ) ENGINE=MyISAM AUTO_INCREMENT=101 DEFAULT CHARSET=latin1; INSERT INTO `t3` VALUES (1,6,'r'); INSERT INTO `t3` VALUES (2,8,'c'); INSERT INTO `t3` VALUES (3,6,'o'); INSERT INTO `t3` VALUES (4,6,'c'); INSERT INTO `t3` VALUES (5,3,'d'); INSERT INTO `t3` VALUES (6,9,'v'); INSERT INTO `t3` VALUES (7,2,'m'); INSERT INTO `t3` VALUES (8,1,'j'); INSERT INTO `t3` VALUES (9,8,'f'); INSERT INTO `t3` VALUES (10,0,'n'); INSERT INTO `t3` VALUES (11,9,'z'); INSERT INTO `t3` VALUES (12,8,'h'); INSERT INTO `t3` VALUES (13,NULL,'q'); INSERT INTO `t3` VALUES (14,0,'w'); INSERT INTO `t3` VALUES (15,5,'z'); INSERT INTO `t3` VALUES (16,1,'j'); INSERT INTO `t3` VALUES (17,1,'a'); INSERT INTO `t3` VALUES (18,6,'m'); INSERT INTO `t3` VALUES (19,6,'n'); INSERT INTO `t3` VALUES (20,1,'e'); INSERT INTO `t3` VALUES (21,8,'u'); INSERT INTO `t3` VALUES (22,1,'s'); INSERT INTO `t3` VALUES (23,0,'u'); INSERT INTO `t3` VALUES (24,4,'r'); INSERT INTO `t3` VALUES (25,9,'g'); INSERT INTO `t3` VALUES (26,8,'o'); INSERT INTO `t3` VALUES (27,5,'w'); INSERT INTO `t3` VALUES (28,9,'b'); INSERT INTO `t3` VALUES (29,5,NULL); INSERT INTO `t3` VALUES (30,NULL,'y'); INSERT INTO `t3` VALUES (31,NULL,'y'); INSERT INTO `t3` VALUES (32,105,'u'); INSERT INTO `t3` VALUES (33,0,'p'); INSERT INTO `t3` VALUES (34,3,'s'); INSERT INTO `t3` VALUES (35,1,'e'); INSERT INTO `t3` VALUES (36,75,'d'); INSERT INTO `t3` VALUES (37,9,'d'); INSERT INTO `t3` VALUES (38,7,'c'); INSERT INTO `t3` VALUES (39,NULL,'b'); INSERT INTO `t3` VALUES (40,NULL,'t'); INSERT INTO `t3` VALUES (41,4,NULL); INSERT INTO `t3` VALUES (42,0,'y'); INSERT INTO `t3` VALUES (43,204,'c'); INSERT INTO `t3` VALUES (44,0,'d'); INSERT INTO `t3` VALUES (45,9,'x'); INSERT INTO `t3` VALUES (46,8,'p'); INSERT INTO `t3` VALUES (47,7,'e'); INSERT INTO `t3` VALUES (48,8,'g'); INSERT INTO `t3` VALUES (49,NULL,'x'); INSERT INTO `t3` VALUES (50,6,'s'); INSERT INTO `t3` VALUES (51,5,'e'); INSERT INTO `t3` VALUES (52,2,'l'); INSERT INTO `t3` VALUES (53,3,'p'); INSERT INTO `t3` VALUES (54,7,'h'); INSERT INTO `t3` VALUES (55,NULL,'m'); INSERT INTO `t3` VALUES (56,145,'n'); INSERT INTO `t3` VALUES (57,0,'v'); INSERT INTO `t3` VALUES (58,1,'b'); INSERT INTO `t3` VALUES (59,7,'x'); INSERT INTO `t3` VALUES (60,3,'r'); INSERT INTO `t3` VALUES (61,NULL,'t'); INSERT INTO `t3` VALUES (62,2,'w'); INSERT INTO `t3` VALUES (63,2,'w'); INSERT INTO `t3` VALUES (64,2,'k'); INSERT INTO `t3` VALUES (65,8,'a'); INSERT INTO `t3` VALUES (66,6,'t'); INSERT INTO `t3` VALUES (67,1,'z'); INSERT INTO `t3` VALUES (68,NULL,'e'); INSERT INTO `t3` VALUES (69,1,'q'); INSERT INTO `t3` VALUES (70,0,'e'); INSERT INTO `t3` VALUES (71,4,'v'); INSERT INTO `t3` VALUES (72,1,'d'); INSERT INTO `t3` VALUES (73,1,'u'); INSERT INTO `t3` VALUES (74,27,'o'); INSERT INTO `t3` VALUES (75,4,'b'); INSERT INTO `t3` VALUES (76,6,'c'); INSERT INTO `t3` VALUES (77,2,'q'); INSERT INTO `t3` VALUES (78,248,NULL); INSERT INTO `t3` VALUES (79,NULL,'h'); INSERT INTO `t3` VALUES (80,9,'d'); INSERT INTO `t3` VALUES (81,75,'w'); INSERT INTO `t3` VALUES (82,2,'m'); INSERT INTO `t3` VALUES (83,9,'i'); INSERT INTO `t3` VALUES (84,4,'w'); INSERT INTO `t3` VALUES (85,0,'f'); INSERT INTO `t3` VALUES (86,0,'k'); INSERT INTO `t3` VALUES (87,1,'v'); INSERT INTO `t3` VALUES (88,119,'c'); INSERT INTO `t3` VALUES (89,1,'y'); INSERT INTO `t3` VALUES (90,7,'h'); INSERT INTO `t3` VALUES (91,2,NULL); INSERT INTO `t3` VALUES (92,7,'t'); INSERT INTO `t3` VALUES (93,2,'l'); INSERT INTO `t3` VALUES (94,6,'a'); INSERT INTO `t3` VALUES (95,4,'r'); INSERT INTO `t3` VALUES (96,5,'s'); INSERT INTO `t3` VALUES (97,7,'z'); INSERT INTO `t3` VALUES (98,1,'j'); INSERT INTO `t3` VALUES (99,7,'c'); INSERT INTO `t3` VALUES (100,2,'f'); CREATE TABLE `t2` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`) ) ENGINE=MyISAM AUTO_INCREMENT=11 DEFAULT CHARSET=latin1; INSERT INTO `t2` VALUES (10,8,NULL); set optimizer_switch='subquery_cache=off'; SELECT ( SELECT `col_int_nokey` FROM t3 WHERE table1 .`col_varchar_nokey` ) field13 FROM t2 table1 JOIN t1 table2 ON table2 .`pk` ORDER BY field13; field13 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL set optimizer_switch='subquery_cache=on'; SELECT (SELECT `col_int_nokey` FROM t3 WHERE table1 .`col_varchar_nokey` ) field13 FROM t2 table1 JOIN t1 table2 ON table2 .`pk` ORDER BY field13; field13 NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL drop table t1,t2,t3; set @@optimizer_switch= default; # LP BUG#615760 (part 1: double transformation) create table t1 (a int); insert into t1 values (1),(2); create table t2 (b int); insert into t2 values (1),(2); set optimizer_switch='default,semijoin=off,materialization=off,subquery_cache=on'; explain extended select * from t1 where a in (select b from t2); id select_type table type possible_keys key key_len ref rows filtered Extra 1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00 Using where 2 DEPENDENT SUBQUERY t2 ALL NULL NULL NULL NULL 2 100.00 Using where Warnings: Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where <`test`.`t1`.`a`>((`test`.`t1`.`a`,(select `test`.`t2`.`b` from `test`.`t2` where ((`test`.`t1`.`a`) = `test`.`t2`.`b`)))) drop table t1,t2; set @@optimizer_switch= default; # LP BUG#615760 (part 2: incorrect heap table index flags) SET SESSION optimizer_switch = 'index_merge=off,index_merge_union=off,index_merge_sort_union=off,index_merge_intersection=off,index_condition_pushdown=off,firstmatch=off,loosescan=off,materialization=off,semijoin=off,partial_match_rowid_merge=off,partial_match_table_scan=off,subquery_cache=on'; CREATE TABLE `t1` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_int_key` (`col_int_key`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ) AUTO_INCREMENT=30 DEFAULT CHARSET=latin1; INSERT INTO `t1` VALUES (10,7,8,'v','v'); INSERT INTO `t1` VALUES (11,1,9,'r','r'); INSERT INTO `t1` VALUES (12,5,9,'a','a'); INSERT INTO `t1` VALUES (13,3,186,'m','m'); INSERT INTO `t1` VALUES (14,6,NULL,'y','y'); INSERT INTO `t1` VALUES (15,92,2,'j','j'); INSERT INTO `t1` VALUES (16,7,3,'d','d'); INSERT INTO `t1` VALUES (17,NULL,0,'z','z'); INSERT INTO `t1` VALUES (18,3,133,'e','e'); INSERT INTO `t1` VALUES (19,5,1,'h','h'); INSERT INTO `t1` VALUES (20,1,8,'b','b'); INSERT INTO `t1` VALUES (21,2,5,'s','s'); INSERT INTO `t1` VALUES (22,NULL,5,'e','e'); INSERT INTO `t1` VALUES (23,1,8,'j','j'); INSERT INTO `t1` VALUES (24,0,6,'e','e'); INSERT INTO `t1` VALUES (25,210,51,'f','f'); INSERT INTO `t1` VALUES (26,8,4,'v','v'); INSERT INTO `t1` VALUES (27,7,7,'x','x'); INSERT INTO `t1` VALUES (28,5,6,'m','m'); INSERT INTO `t1` VALUES (29,NULL,4,'c','c'); CREATE TABLE `t2` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_int_nokey` int(11) DEFAULT NULL, `col_int_key` int(11) DEFAULT NULL, `col_varchar_key` varchar(1) DEFAULT NULL, `col_varchar_nokey` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_int_key` (`col_int_key`), KEY `col_varchar_key` (`col_varchar_key`,`col_int_key`) ) AUTO_INCREMENT=21 DEFAULT CHARSET=latin1; INSERT INTO `t2` VALUES (1,NULL,2,'w','w'); INSERT INTO `t2` VALUES (2,7,9,'m','m'); INSERT INTO `t2` VALUES (3,9,3,'m','m'); INSERT INTO `t2` VALUES (4,7,9,'k','k'); INSERT INTO `t2` VALUES (5,4,NULL,'r','r'); INSERT INTO `t2` VALUES (6,2,9,'t','t'); INSERT INTO `t2` VALUES (7,6,3,'j','j'); INSERT INTO `t2` VALUES (8,8,8,'u','u'); INSERT INTO `t2` VALUES (9,NULL,8,'h','h'); INSERT INTO `t2` VALUES (10,5,53,'o','o'); INSERT INTO `t2` VALUES (11,NULL,0,NULL,NULL); INSERT INTO `t2` VALUES (12,6,5,'k','k'); INSERT INTO `t2` VALUES (13,188,166,'e','e'); INSERT INTO `t2` VALUES (14,2,3,'n','n'); INSERT INTO `t2` VALUES (15,1,0,'t','t'); INSERT INTO `t2` VALUES (16,1,1,'c','c'); INSERT INTO `t2` VALUES (17,0,9,'m','m'); INSERT INTO `t2` VALUES (18,9,5,'y','y'); INSERT INTO `t2` VALUES (19,NULL,6,'f','f'); INSERT INTO `t2` VALUES (20,4,2,'d','d'); SELECT table1 .`col_varchar_nokey` FROM t2 table1 RIGHT JOIN t1 LEFT JOIN ( SELECT SUBQUERY1_t2 .* FROM t1 SUBQUERY1_t1 LEFT JOIN t2 SUBQUERY1_t2 ON SUBQUERY1_t2 .`col_int_key` = SUBQUERY1_t1 .`col_int_nokey` ) table3 STRAIGHT_JOIN ( ( SELECT * FROM t1 ) table4 JOIN ( t1 table5 JOIN t2 table6 ON table5 .`pk` ) ON table5 .`col_varchar_nokey` ) ON table6 .`pk` = table5 .`col_int_key` ON table5 .`col_varchar_nokey` ON table5 .`col_varchar_key` WHERE table3 .`col_varchar_key` IN ( SELECT `col_varchar_key` FROM t2 ) AND table1 .`col_varchar_key` OR table1 .`pk` ; col_varchar_nokey drop table t1,t2; set @@optimizer_switch= default; set optimizer_switch='subquery_cache=on'; # LP BUG#615378 (incorrect NULL result returning in Item_cache) CREATE TABLE `t1` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_varchar_key` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_varchar_key` (`col_varchar_key`) ) DEFAULT CHARSET=latin1; INSERT INTO `t1` VALUES (10,'v'); INSERT INTO `t1` VALUES (11,'r'); CREATE TABLE `t2` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_varchar_key` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_varchar_key` (`col_varchar_key`) ) DEFAULT CHARSET=latin1; INSERT INTO `t2` VALUES (1,'r'); INSERT INTO `t2` VALUES (2,'c'); CREATE TABLE `t3` ( `pk` int(11) NOT NULL AUTO_INCREMENT, `col_varchar_key` varchar(1) DEFAULT NULL, PRIMARY KEY (`pk`), KEY `col_varchar_key` (`col_varchar_key`) ) DEFAULT CHARSET=latin1; INSERT INTO `t3` VALUES (1,'w'); SELECT SUM( DISTINCT table2 . `pk` ) AS field2 , (SELECT SUM( SUBQUERY1_t2 . `pk` ) AS SUBQUERY1_field1 FROM t2 AS SUBQUERY1_t2 STRAIGHT_JOIN t3 AS SUBQUERY1_t3 ON (SUBQUERY1_t3 . `pk` = SUBQUERY1_t2 . `pk` ) WHERE table1 . `col_varchar_key` ) AS field3 FROM ( t1 AS table1 LEFT JOIN ( t2 AS table2 STRAIGHT_JOIN t3 AS table3 ON (table3 . `pk` = table2 . `pk` ) ) ON (table3 . `col_varchar_key` = table1 . `col_varchar_key` ) ) WHERE ( table1 . `pk` < 5 ) OR ( table1 . `col_varchar_key` IS NOT NULL) GROUP BY field3 HAVING (field3 <= 'h' AND field2 != 4) ; field2 field3 drop tables t1, t2, t3; # # Test aggregate functions as parameters to subquery cache # CREATE TABLE t1 ( a INT, b INT, c INT, KEY (a, b)); INSERT INTO t1 VALUES ( 1, 1, 1 ), ( 1, 2, 2 ), ( 1, 3, 3 ), ( 1, 4, 6 ), ( 1, 5, 5 ), ( 1, 9, 13 ), ( 2, 1, 6 ), ( 2, 2, 7 ), ( 2, 3, 8 ); SELECT a, AVG(t1.b), (SELECT t11.c FROM t1 t11 WHERE t11.a = t1.a AND t11.b = AVG(t1.b)) AS t11c FROM t1 GROUP BY a; a AVG(t1.b) t11c 1 4.0000 6 2 2.0000 7 DROP TABLE t1; # # Test of LP BUG#800696 (deleting list of Items (OR arguments) # in optimization) # set optimizer_switch='subquery_cache=on,in_to_exists=on'; CREATE TABLE t1 ( f3 int) ; INSERT INTO t1 VALUES (0),(0); CREATE TABLE t3 ( f3 int) ; INSERT INTO t3 VALUES (0),(0); CREATE TABLE t2 ( f1 int, f2 int, f3 int) ; INSERT INTO t2 VALUES (7,0,0); SELECT * FROM t2, t3 WHERE t2.f2 OR t3.f3 IN ( SELECT t2.f2 FROM t1 WHERE t2.f1 OR t2.f3 ); f1 f2 f3 f3 7 0 0 0 7 0 0 0 drop tables t1, t2, t3; # # Test of LP BUG#872775 view with "outer references" bug # set @@optimizer_switch= default; set optimizer_switch='subquery_cache=on'; CREATE TABLE t1 (a int) ; CREATE TABLE t2 (b int, c varchar(1) NOT NULL ) ; INSERT INTO t2 VALUES (1,'x'),(2,'y'); CREATE TABLE t3 (a int) ; CREATE TABLE t4 ( pk int(11) NOT NULL , b int(11) NOT NULL ) ; INSERT INTO t4 VALUES (26,9),(27,5),(28,0),(29,3); CREATE OR REPLACE VIEW v1 AS SELECT t2.b FROM t1 JOIN t2 WHERE t2 .c > ( SELECT t2.c FROM t3 ); SELECT * FROM t4 WHERE b NOT IN ( SELECT * FROM v1 ); pk b 26 9 27 5 28 0 29 3 drop view v1; drop table t1,t2,t3,t4; SET optimizer_switch=@save_optimizer_switch; # restore default set @@optimizer_switch= default;