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multi-delete with subselects (SCRUM)

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mysql-test/r/subselect.result:
  Multi-delete with subselect test
mysql-test/t/subselect.test:
  Multi-delete with subselect test
sql/sql_parse.cc:
  multi-delete with subselects
This commit is contained in:
unknown 2002-11-26 22:33:33 +02:00
parent 8079acf080
commit 9ee2cee69a
3 changed files with 45 additions and 1 deletions
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27
mysql-test/r/subselect.result
View File

@ -353,6 +353,33 @@ a b
0 10
1 11
drop table t1, t2;
drop table if exists t11, t12, t2;
create table t11 (a int NOT NULL, b int, primary key (a));
create table t12 (a int NOT NULL, b int, primary key (a));
create table t2 (a int NOT NULL, b int, primary key (a));
insert into t11 values (0, 10),(1, 11),(2, 12);
insert into t12 values (33, 10),(22, 11),(2, 12);
insert into t2 values (1, 21),(2, 12),(3, 23);
select * from t11;
a b
0 10
1 11
2 12
select * from t12;
a b
33 10
22 11
2 12
delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t2 where t11.a = t2.a);
select * from t11;
a b
0 10
1 11
select * from t12;
a b
33 10
22 11
drop table t11, t12, t2;
CREATE TABLE t1 (x int);
create table t2 (a int);
insert into t2 values (1);

15
mysql-test/t/subselect.test
View File

@ -226,6 +226,21 @@ delete from t1 where b = (select b from t2 where t1.a = t2.a);
select * from t1;
drop table t1, t2;
#multi-delete with subselects
drop table if exists t11, t12, t2;
create table t11 (a int NOT NULL, b int, primary key (a));
create table t12 (a int NOT NULL, b int, primary key (a));
create table t2 (a int NOT NULL, b int, primary key (a));
insert into t11 values (0, 10),(1, 11),(2, 12);
insert into t12 values (33, 10),(22, 11),(2, 12);
insert into t2 values (1, 21),(2, 12),(3, 23);
select * from t11;
select * from t12;
delete t11.*, t12.* from t11,t12 where t11.a = t12.a and t11.b = (select b from t2 where t11.a = t2.a);
select * from t11;
select * from t12;
drop table t11, t12, t2;
#insert with subselects
CREATE TABLE t1 (x int);
create table t2 (a int);

4
sql/sql_parse.cc
View File

@ -2095,10 +2095,12 @@ mysql_execute_command(THD *thd)
/* Fix tables-to-be-deleted-from list to point at opened tables */
for (auxi=(TABLE_LIST*) aux_tables ; auxi ; auxi=auxi->next)
auxi->table= auxi->table_list->table;
fix_tables_pointers(&lex->select_lex);
if (!thd->fatal_error && (result= new multi_delete(thd,aux_tables,
table_count)))
{
res= mysql_select(thd,tables,select_lex->item_list,
res= mysql_select(thd,select_lex->get_table_list(),
select_lex->item_list,
select_lex->where,
(ORDER *)NULL,(ORDER *)NULL,(Item *)NULL,
(ORDER *)NULL,