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Merge moonbone.local:/mnt/gentoo64/work/22331-bug-5.0-opt-mysql

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into  moonbone.local:/mnt/gentoo64/work/25373-bug-5.0-opt-mysql


mysql-test/r/subselect.result:
  Auto merged
sql/sql_lex.h:
  Auto merged
sql/sql_select.cc:
  Auto merged
sql/sql_lex.cc:
  SCCS merged
This commit is contained in:
unknown 2007-03-07 22:22:19 +03:00
commit 6f18c39265
8 changed files with 74 additions and 15 deletions
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29
mysql-test/r/explain.result
View File

@ -57,3 +57,32 @@ select 3 into @v1;
explain select 3 into @v1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
create table t1(f1 int, f2 int);
insert into t1 values (1,1);
create view v1 as select * from t1 where f1=1;
explain extended select * from v1 where f2=1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system NULL NULL NULL NULL 1
Warnings:
Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f2` AS `f2` from `test`.`t1` where 1
explain extended select * from t1 where 0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
Warnings:
Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f2` AS `f2` from `test`.`t1` where 0
explain extended select * from t1 where 1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system NULL NULL NULL NULL 1
Warnings:
Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f2` AS `f2` from `test`.`t1` where 1
explain extended select * from t1 having 0;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible HAVING
Warnings:
Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f2` AS `f2` from `test`.`t1` having 0
explain extended select * from t1 having 1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system NULL NULL NULL NULL 1
Warnings:
Note 1003 select `test`.`t1`.`f1` AS `f1`,`test`.`t1`.`f2` AS `f2` from `test`.`t1` having 1
drop table t1;

2
mysql-test/r/func_test.result
View File

@ -79,7 +79,7 @@ explain extended select * from t1 where 1 xor 1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
Warnings:
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1`
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` where 0
select - a from t1;
- a
-1

16
mysql-test/r/subselect.result
View File

@ -421,7 +421,7 @@ id select_type table type possible_keys key key_len ref rows Extra
3 UNION NULL NULL NULL NULL NULL NULL NULL No tables used
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
Warnings:
Note 1003 select 1 AS `1` from `test`.`t1`
Note 1003 select 1 AS `1` from `test`.`t1` where 1
drop table t1;
CREATE TABLE `t1` (
`numeropost` mediumint(8) unsigned NOT NULL auto_increment,
@ -1180,7 +1180,7 @@ 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 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
Warnings:
Note 1003 select <in_optimizer>(0,<exists>(select 1 AS `Not_used` from `test`.`t1` `a`)) AS `0 IN (SELECT 1 FROM t1 a)`
Note 1003 select <in_optimizer>(0,<exists>(select 1 AS `Not_used` from `test`.`t1` `a` where 0)) AS `0 IN (SELECT 1 FROM t1 a)`
INSERT INTO t1 (pseudo) VALUES ('test1');
SELECT 0 IN (SELECT 1 FROM t1 a);
0 IN (SELECT 1 FROM t1 a)
@ -1190,7 +1190,7 @@ 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 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
Warnings:
Note 1003 select <in_optimizer>(0,<exists>(select 1 AS `Not_used` from `test`.`t1` `a`)) AS `0 IN (SELECT 1 FROM t1 a)`
Note 1003 select <in_optimizer>(0,<exists>(select 1 AS `Not_used` from `test`.`t1` `a` where 0)) AS `0 IN (SELECT 1 FROM t1 a)`
drop table t1;
CREATE TABLE `t1` (
`i` int(11) NOT NULL default '0',
@ -1532,7 +1532,7 @@ id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
2 SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found
Warnings:
Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3`
Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0
select * from t3 where NULL >= any (select b from t2 group by 1);
a
explain extended select * from t3 where NULL >= any (select b from t2 group by 1);
@ -1540,7 +1540,7 @@ id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
2 SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found
Warnings:
Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3`
Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0
select * from t3 where NULL >= some (select b from t2);
a
explain extended select * from t3 where NULL >= some (select b from t2);
@ -1548,7 +1548,7 @@ id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
2 SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found
Warnings:
Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3`
Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0
select * from t3 where NULL >= some (select b from t2 group by 1);
a
explain extended select * from t3 where NULL >= some (select b from t2 group by 1);
@ -1556,7 +1556,7 @@ id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
2 SUBQUERY t2 system NULL NULL NULL NULL 0 const row not found
Warnings:
Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3`
Note 1003 select `test`.`t3`.`a` AS `a` from `test`.`t3` where 0
insert into t2 values (2,2), (2,1), (3,3), (3,1);
select * from t3 where a > all (select max(b) from t2 group by a);
a
@ -1618,7 +1618,7 @@ id select_type table type possible_keys key key_len ref rows Extra
3 UNION t1 system NULL NULL NULL NULL 1
NULL UNION RESULT <union2,3> ALL NULL NULL NULL NULL NULL
Warnings:
Note 1003 select `test`.`t1`.`s1` AS `s1` from `test`.`t1`
Note 1003 select `test`.`t1`.`s1` AS `s1` from `test`.`t1` where 1
drop table t1;
CREATE TABLE t1 (number char(11) NOT NULL default '') ENGINE=MyISAM CHARSET=latin1;
INSERT INTO t1 VALUES ('69294728265'),('18621828126'),('89356874041'),('95895001874');

14
mysql-test/t/explain.test
View File

@ -51,4 +51,18 @@ set names latin1;
select 3 into @v1;
explain select 3 into @v1;
#
# Bug#22331: Wrong WHERE in EXPLAIN EXTENDED when all expressions were
# optimized away.
#
create table t1(f1 int, f2 int);
insert into t1 values (1,1);
create view v1 as select * from t1 where f1=1;
explain extended select * from v1 where f2=1;
explain extended select * from t1 where 0;
explain extended select * from t1 where 1;
explain extended select * from t1 having 0;
explain extended select * from t1 having 1;
drop table t1;
# End of 5.0 tests.

1
sql/sql_lex.cc
View File

@ -1195,6 +1195,7 @@ void st_select_lex::init_select()
is_correlated= 0;
cur_pos_in_select_list= UNDEF_POS;
non_agg_fields.empty();
cond_value= having_value= Item::COND_UNDEF;
inner_refs_list.empty();
}

2
sql/sql_lex.h
View File

@ -488,6 +488,8 @@ public:
Item *where, *having; /* WHERE & HAVING clauses */
Item *prep_where; /* saved WHERE clause for prepared statement processing */
Item *prep_having;/* saved HAVING clause for prepared statement processing */
/* Saved values of the WHERE and HAVING clauses*/
Item::cond_result cond_value, having_value;
/* point on lex in which it was created, used in view subquery detection */
st_lex *parent_lex;
enum olap_type olap;

23
sql/sql_select.cc
View File

@ -749,7 +749,6 @@ JOIN::optimize()
}
{
Item::cond_result having_value;
having= optimize_cond(this, having, join_list, &having_value);
if (thd->net.report_error)
{
@ -757,6 +756,10 @@ JOIN::optimize()
DBUG_PRINT("error",("Error from optimize_cond"));
DBUG_RETURN(1);
}
if (select_lex->where)
select_lex->cond_value= cond_value;
if (select_lex->having)
select_lex->having_value= having_value;
if (cond_value == Item::COND_FALSE || having_value == Item::COND_FALSE ||
(!unit->select_limit_cnt && !(select_options & OPTION_FOUND_ROWS)))
@ -897,6 +900,7 @@ JOIN::optimize()
conds->update_used_tables();
DBUG_EXECUTE("where", print_where(conds, "after substitute_best_equal"););
}
/*
Permorm the the optimization on fields evaluation mentioned above
for all on expressions.
@ -7606,6 +7610,9 @@ static COND* substitute_for_best_equal_field(COND *cond,
break;
}
}
if (!((Item_cond*)cond)->argument_list()->elements)
cond= new Item_int(cond->val_bool());
}
else if (cond->type() == Item::FUNC_ITEM &&
((Item_cond*) cond)->functype() == Item_func::MULT_EQUAL_FUNC)
@ -15324,10 +15331,13 @@ void st_select_lex::print(THD *thd, String *str)
Item *cur_where= where;
if (join)
cur_where= join->conds;
if (cur_where)
if (cur_where || cond_value != Item::COND_UNDEF)
{
str->append(STRING_WITH_LEN(" where "));
cur_where->print(str);
if (cur_where)
cur_where->print(str);
else
str->append(cond_value != Item::COND_FALSE ? "1" : "0");
}
// group by & olap
@ -15353,10 +15363,13 @@ void st_select_lex::print(THD *thd, String *str)
if (join)
cur_having= join->having;
if (cur_having)
if (cur_having || having_value != Item::COND_UNDEF)
{
str->append(STRING_WITH_LEN(" having "));
cur_having->print(str);
if (cur_having)
cur_having->print(str);
else
str->append(having_value != Item::COND_FALSE ? "1" : "0");
}
if (order_list.elements)

2
sql/sql_select.h
View File

@ -292,7 +292,7 @@ public:
bool need_tmp, hidden_group_fields;
DYNAMIC_ARRAY keyuse;
Item::cond_result cond_value;
Item::cond_result cond_value, having_value;
List<Item> all_fields; // to store all fields that used in query
//Above list changed to use temporary table
List<Item> tmp_all_fields1, tmp_all_fields2, tmp_all_fields3;