diff options
| -rw-r--r-- | mysql-test/main/table_value_constr.result | 110 | ||||
| -rw-r--r-- | mysql-test/main/table_value_constr.test | 57 | ||||
| -rw-r--r-- | mysql-test/suite/compat/oracle/r/table_value_constr.result | 4 | ||||
| -rw-r--r-- | sql/sql_lex.cc | 23 | ||||
| -rw-r--r-- | sql/sql_lex.h | 1 | ||||
| -rw-r--r-- | sql/sql_tvc.cc | 67 |
6 files changed, 231 insertions, 31 deletions
diff --git a/mysql-test/main/table_value_constr.result b/mysql-test/main/table_value_constr.result index e112aca78af..603f21a772d 100644 --- a/mysql-test/main/table_value_constr.result +++ b/mysql-test/main/table_value_constr.result @@ -748,7 +748,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 MATERIALIZED <derived2> ALL NULL NULL NULL NULL 2 100.00 2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: -Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1)) `tvc_0`) where 1 +Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1)) `tvc_0`) where 1 explain extended select * from t1 where a in (select * from (values (1)) as tvc_0); id select_type table type possible_keys key key_len ref rows filtered Extra @@ -983,7 +983,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 MATERIALIZED <derived2> ALL NULL NULL NULL NULL 2 100.00 2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: -Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0`) where 1 +Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0`) where 1 explain extended select * from t1 where a = any (select * from (values (1),(2)) as tvc_0); id select_type table type possible_keys key key_len ref rows filtered Extra @@ -2775,4 +2775,110 @@ id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used 2 SUBQUERY t1 ALL NULL NULL NULL NULL 3 Using where drop table t1; +# +# MDEV-24910: TVC containing subquery used as a subselect +# +create table t1 (a int) engine=myisam; +insert into t1 values (3), (7), (1); +create table t2 (b int) engine=myisam; +insert into t2 values (1), (2); +select (values ((select 2))) from t2; +(values ((select 2))) +2 +2 +explain select (values ((select 2))) from t2; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 +4 SUBQUERY <derived2> ALL NULL NULL NULL NULL 2 +2 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used +Warnings: +Note 1249 Select 3 was reduced during optimization +prepare stmt from "select (values ((select 2))) from t2"; +execute stmt; +(values ((select 2))) +2 +2 +execute stmt; +(values ((select 2))) +2 +2 +deallocate prepare stmt; +select (values ((select * from t1 where a > 10))) from t2; +(values ((select * from t1 where a > 10))) +NULL +NULL +explain select (values ((select * from t1 where a > 10))) from t2; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 +4 SUBQUERY <derived2> ALL NULL NULL NULL NULL 2 +2 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used +3 SUBQUERY t1 ALL NULL NULL NULL NULL 3 Using where +prepare stmt from "select (values ((select * from t1 where a > 10))) from t2"; +execute stmt; +(values ((select * from t1 where a > 10))) +NULL +NULL +execute stmt; +(values ((select * from t1 where a > 10))) +NULL +NULL +deallocate prepare stmt; +create table t3 (a int); +insert into t3 values +(3), (7), (7), (1), (3), (9), (7), (9), (8), (7), (8); +create view v1 as select count(a) as c from t3 group by a; +select +(values ((select * from t3 where a in (select * from v1)))); +(values ((select * from t3 where a in (select * from v1)))) +1 +explain select +(values ((select * from t3 where a in (select * from v1)))); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +6 SUBQUERY <derived2> ALL NULL NULL NULL NULL 2 +2 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used +3 SUBQUERY t3 ALL NULL NULL NULL NULL 11 +3 SUBQUERY <subquery4> eq_ref distinct_key distinct_key 8 func 1 Using where +4 MATERIALIZED <derived5> ALL NULL NULL NULL NULL 11 +5 DERIVED t3 ALL NULL NULL NULL NULL 11 Using temporary; Using filesort +prepare stmt from "select +(values ((select * from t3 where a in (select * from v1))))"; +execute stmt; +(values ((select * from t3 where a in (select * from v1)))) +1 +execute stmt; +(values ((select * from t3 where a in (select * from v1)))) +1 +deallocate prepare stmt; +select +(values ((select * from t3 +where a > 10 and a in (select * from v1)))); +(values ((select * from t3 +where a > 10 and a in (select * from v1)))) +NULL +explain select +(values ((select * from t3 +where a > 10 and a in (select * from v1)))); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY NULL NULL NULL NULL NULL NULL NULL No tables used +6 SUBQUERY <derived2> ALL NULL NULL NULL NULL 2 +2 DERIVED NULL NULL NULL NULL NULL NULL NULL No tables used +3 SUBQUERY t3 ALL NULL NULL NULL NULL 11 Using where +3 SUBQUERY <subquery4> eq_ref distinct_key distinct_key 8 func 1 Using where +4 MATERIALIZED <derived5> ALL NULL NULL NULL NULL 11 +5 DERIVED t3 ALL NULL NULL NULL NULL 11 Using temporary; Using filesort +prepare stmt from "select +(values ((select * from t3 +where a > 10 and a in (select * from v1))))"; +execute stmt; +(values ((select * from t3 +where a > 10 and a in (select * from v1)))) +NULL +execute stmt; +(values ((select * from t3 +where a > 10 and a in (select * from v1)))) +NULL +deallocate prepare stmt; +drop view v1; +drop table t1,t2,t3; End of 10.3 tests diff --git a/mysql-test/main/table_value_constr.test b/mysql-test/main/table_value_constr.test index 0a78fd9b386..2246a19d306 100644 --- a/mysql-test/main/table_value_constr.test +++ b/mysql-test/main/table_value_constr.test @@ -1459,4 +1459,61 @@ eval explain $q3; drop table t1; +--echo # +--echo # MDEV-24910: TVC containing subquery used as a subselect +--echo # + +create table t1 (a int) engine=myisam; +insert into t1 values (3), (7), (1); +create table t2 (b int) engine=myisam; +insert into t2 values (1), (2); + +let $q1= +select (values ((select 2))) from t2; +eval $q1; +eval explain $q1; +eval prepare stmt from "$q1"; +execute stmt; +execute stmt; +deallocate prepare stmt; + +let $q2= +select (values ((select * from t1 where a > 10))) from t2; +eval $q2; +eval explain $q2; +eval prepare stmt from "$q2"; +execute stmt; +execute stmt; +deallocate prepare stmt; + +create table t3 (a int); +insert into t3 values + (3), (7), (7), (1), (3), (9), (7), (9), (8), (7), (8); + +create view v1 as select count(a) as c from t3 group by a; + +let $q3= +select +(values ((select * from t3 where a in (select * from v1)))); +eval $q3; +eval explain $q3; +eval prepare stmt from "$q3"; +execute stmt; +execute stmt; +deallocate prepare stmt; + +let $q4= +select +(values ((select * from t3 + where a > 10 and a in (select * from v1)))); +eval $q4; +eval explain $q4; +eval prepare stmt from "$q4"; +execute stmt; +execute stmt; +deallocate prepare stmt; + +drop view v1; +drop table t1,t2,t3; + --echo End of 10.3 tests diff --git a/mysql-test/suite/compat/oracle/r/table_value_constr.result b/mysql-test/suite/compat/oracle/r/table_value_constr.result index d4f8e28fe07..539329554d5 100644 --- a/mysql-test/suite/compat/oracle/r/table_value_constr.result +++ b/mysql-test/suite/compat/oracle/r/table_value_constr.result @@ -746,7 +746,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 MATERIALIZED <derived2> ALL NULL NULL NULL NULL 2 100.00 2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: -Note 1003 select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from "test"."t1" semi join ((values (1)) "tvc_0") where 1 +Note 1003 /* select#1 */ select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from "test"."t1" semi join ((values (1)) "tvc_0") where 1 explain extended select * from t1 where a in (select * from (values (1)) as tvc_0); id select_type table type possible_keys key key_len ref rows filtered Extra @@ -981,7 +981,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra 3 MATERIALIZED <derived2> ALL NULL NULL NULL NULL 2 100.00 2 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used Warnings: -Note 1003 select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from "test"."t1" semi join ((values (1),(2)) "tvc_0") where 1 +Note 1003 /* select#1 */ select "test"."t1"."a" AS "a","test"."t1"."b" AS "b" from "test"."t1" semi join ((values (1),(2)) "tvc_0") where 1 explain extended select * from t1 where a = any (select * from (values (1),(2)) as tvc_0); id select_type table type possible_keys key key_len ref rows filtered Extra diff --git a/sql/sql_lex.cc b/sql/sql_lex.cc index 9766a28757e..70d795c145d 100644 --- a/sql/sql_lex.cc +++ b/sql/sql_lex.cc @@ -2464,9 +2464,32 @@ void st_select_lex_node::add_slave(st_select_lex_node *slave_arg) { slave= slave_arg; slave_arg->master= this; + slave->prev= &master->slave; + slave->next= 0; } } +/* + @brief + Substitute this node in select tree for a newly creates node + + @param subst the node to substitute for + + @details + The function substitute this node in the select tree for a newly + created node subst. This node is just removed from the tree but all + its link fields and the attached sub-tree remain untouched. +*/ + +void st_select_lex_node::substitute_in_tree(st_select_lex_node *subst) +{ + if ((subst->next= next)) + next->prev= &subst->next; + subst->prev= prev; + (*prev)= subst; + subst->master= master; +} + /* include on level down (but do not link) diff --git a/sql/sql_lex.h b/sql/sql_lex.h index 77b4e15aaf0..979e212c1f6 100644 --- a/sql/sql_lex.h +++ b/sql/sql_lex.h @@ -711,6 +711,7 @@ public: void include_global(st_select_lex_node **plink); void exclude(); void exclude_from_tree(); + void substitute_in_tree(st_select_lex_node *subst); void set_slave(st_select_lex_node *slave_arg) { slave= slave_arg; } void move_node(st_select_lex_node *where_to_move) diff --git a/sql/sql_tvc.cc b/sql/sql_tvc.cc index 0a5f6687e17..0a771b592e4 100644 --- a/sql/sql_tvc.cc +++ b/sql/sql_tvc.cc @@ -654,44 +654,61 @@ st_select_lex *wrap_tvc(THD *thd, st_select_lex *tvc_sl, Query_arena backup; Query_arena *arena= thd->activate_stmt_arena_if_needed(&backup); + + Item *item; + SELECT_LEX *wrapper_sl; + SELECT_LEX_UNIT *derived_unit; + /* - Create SELECT_LEX of the select used in the result of transformation + Create SELECT_LEX wrapper_sl of the select used in the result + of the transformation */ - lex->current_select= tvc_sl; - if (mysql_new_select(lex, 0, NULL)) + if (!(wrapper_sl= new (thd->mem_root) SELECT_LEX())) goto err; - mysql_init_select(lex); - /* Create item list as '*' for the subquery SQ */ - Item *item; - SELECT_LEX *wrapper_sl; - wrapper_sl= lex->current_select; + wrapper_sl->select_number= ++thd->lex->stmt_lex->current_select_number; + wrapper_sl->parent_lex= lex; /* Used in init_query. */ + wrapper_sl->init_query(); + wrapper_sl->init_select(); + + wrapper_sl->nest_level= tvc_sl->nest_level; + wrapper_sl->parsing_place= tvc_sl->parsing_place; wrapper_sl->linkage= tvc_sl->linkage; - wrapper_sl->parsing_place= SELECT_LIST; + + lex->current_select= wrapper_sl; item= new (thd->mem_root) Item_field(thd, &wrapper_sl->context, NULL, NULL, &star_clex_str); if (item == NULL || add_item_to_list(thd, item)) goto err; (wrapper_sl->with_wild)++; - - /* Exclude SELECT with TVC */ - tvc_sl->exclude(); + + /* Include the newly created select into the global list of selects */ + wrapper_sl->include_global((st_select_lex_node**)&lex->all_selects_list); + + /* Substitute select node used of TVC for the newly created select */ + tvc_sl->substitute_in_tree(wrapper_sl); + /* - Create derived table DT that will wrap TVC in the result of transformation + Create a unit for the substituted select used for TVC and attach it + to the the wrapper select wrapper_sl as the only unit. The created + unit is the unit for the derived table tvc_x of the transformation. */ - SELECT_LEX *tvc_select; // select for tvc - SELECT_LEX_UNIT *derived_unit; // unit for tvc_select - if (mysql_new_select(lex, 1, tvc_sl)) + if (!(derived_unit= new (thd->mem_root) SELECT_LEX_UNIT())) goto err; - tvc_select= lex->current_select; - derived_unit= tvc_select->master_unit(); - tvc_select->linkage= DERIVED_TABLE_TYPE; + derived_unit->init_query(); + derived_unit->thd= thd; + derived_unit->include_down(wrapper_sl); - lex->current_select= wrapper_sl; + /* + Attach the select used of TVC as the only slave to the unit for + the derived table tvc_x of the transformation + */ + derived_unit->add_slave(tvc_sl); + tvc_sl->linkage= DERIVED_TABLE_TYPE; /* - Create the name of the wrapping derived table and - add it to the FROM list of the wrapper - */ + Generate the name of the derived table created for TVC and + add it to the FROM list of the wrapping select + */ Table_ident *ti; LEX_CSTRING alias; TABLE_LIST *derived_tab; @@ -710,10 +727,6 @@ st_select_lex *wrap_tvc(THD *thd, st_select_lex *tvc_sl, wrapper_sl->table_list.first->derived_type= DTYPE_TABLE | DTYPE_MATERIALIZE; lex->derived_tables|= DERIVED_SUBQUERY; - wrapper_sl->where= 0; - wrapper_sl->set_braces(false); - derived_unit->set_with_clause(0); - if (arena) thd->restore_active_arena(arena, &backup); thd->lex->result= save_result; |