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added depended subselect processing

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mysql-test/r/subselect.result:
  depended subselect test
mysql-test/t/subselect.test:
  depended subselect test
sql/item.cc:
  resolving field names in depended queries
sql/item_subselect.cc:
  move optimization just before execution, because we can't optimize inner depended subselect if have not optimized outer subselect
sql/item_subselect.h:
  move optimization just before execution
sql/sql_lex.h:
  some inline methods to hide internal SELECT_LEX structures
sql/sql_select.cc:
  fixed error
This commit is contained in:
unknown
2002-05-26 22:50:32 +03:00
parent 3a6483fe4b
commit 02d8b9ba56
9 changed files with 109 additions and 17 deletions
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8
mysql-test/r/subselect.result
View File

@ -6,6 +6,14 @@ create table t4 (a int, b int);
insert into t1 values (2);
insert into t2 values (1,7),(2,7);
insert into t4 values (4,8),(3,8),(5,9);
select (select a from t1 where t1.a=t2.a), a from t2;
(select a from t1 where t1.a=t2.a) a
NULL 1
2 2
select (select a from t1 where t1.a=t2.b), a from t2;
(select a from t1 where t1.a=t2.b) a
NULL 1
NULL 2
select (select a from t1), a from t2;
(select a from t1) a
2 1

2
mysql-test/t/subselect.test
View File

@ -8,6 +8,8 @@ create table t4 (a int, b int);
insert into t1 values (2);
insert into t2 values (1,7),(2,7);
insert into t4 values (4,8),(3,8),(5,9);
select (select a from t1 where t1.a=t2.a), a from t2;
select (select a from t1 where t1.a=t2.b), a from t2;
select (select a from t1), a from t2;
select (select a from t3), a from t2;
select * from t2 where t2.a=(select a from t1);