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Commit cb73bc11 authored by Rex's avatar Rex
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MDEV-28621 group by optimization incorrectly removing subquery where subject buried in a function 

Do not remove the unit from the query graph.  Group by item removal happens during prepare phase.
Revert change after execution.
parent 704ff8da
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Showing with 517 additions and 14 deletions
mysql-test/main/subselect4.result
View file @ cb73bc11
......@@ -3041,7 +3041,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00
2 SUBQUERY t3 ALL NULL NULL NULL NULL 2 100.00
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`b` AS `b` from `test`.`t2` where 1
Note 1003 /* select#1 */ select `test`.`t2`.`b` AS `b` from `test`.`t2` where <in_optimizer>(1,exists(/* select#2 */ select `test`.`t3`.`c` from `test`.`t3` limit 1))
select b from t2
where exists (select c from t3
group by (select a from t1 where a = 1) in (select d from t4));
......@@ -3068,7 +3068,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00
2 SUBQUERY t3 ALL NULL NULL NULL NULL 2 100.00
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`b` AS `b` from `test`.`t2` where 1
Note 1003 /* select#1 */ select `test`.`t2`.`b` AS `b` from `test`.`t2` where <in_optimizer>(1,exists(/* select#2 */ select `test`.`t3`.`c` from `test`.`t3` limit 1))
select b from t2
where exists (select c from t3
group by (select a from t1 where a = 1) >=
......@@ -3084,7 +3084,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 100.00
2 SUBQUERY t3 ALL NULL NULL NULL NULL 2 100.00
Warnings:
Note 1003 /* select#1 */ select `test`.`t2`.`b` AS `b` from `test`.`t2` where 1
Note 1003 /* select#1 */ select `test`.`t2`.`b` AS `b` from `test`.`t2` where <in_optimizer>(1,exists(/* select#2 */ select `test`.`t3`.`c` from `test`.`t3` limit 1))
select b from t2
where exists (select c from t3
group by (select a from t1 where a = 1) <
......@@ -3100,7 +3100,7 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
2 MATERIALIZED t3 ALL NULL NULL NULL NULL 2 100.00
Warnings:
Note 1003 select `test`.`t2`.`b` AS `b` from `test`.`t2` semi join (`test`.`t3`) where 1
Note 1003 /* select#1 */ select `test`.`t2`.`b` AS `b` from `test`.`t2` semi join (`test`.`t3`) where 1
select b from t2
where b in (select c from t3
group by (select a from t1 where a = 1) in (select d from t4));
......
mysql-test/main/subselect_elimination.result 0 → 100644
View file @ cb73bc11
#
# MDEV-28621 group by optimization incorrectly removing subquery where
# subject buried in a function
#
CREATE TABLE t1 (i int) ;
INSERT INTO t1 VALUES (1),(2),(3);
SELECT 1 FROM t1
WHERE i in
( SELECT a+1
FROM
(SELECT (SELECT i FROM (SELECT 1 FROM t1) dt) AS a FROM t1) dt2
GROUP BY a
);
ERROR 21000: Subquery returns more than 1 row
DROP TABLE t1;
create table t1 (a int, b int, c int);
insert into t1 select seq, seq, seq from seq_1_to_10;
create table t2 as select * from t1;
create table t20 as select * from t1;
create table t21 as select * from t1;
create table t3 as select * from t1;
select a, a in
(
select
(
select max(c) from t20 where t20.a<=t2.a
) as SUBQ1 from t2 group by SUBQ1+1
) as COL
from t1;
a COL
1 1
2 1
3 1
4 1
5 1
6 1
7 1
8 1
9 1
10 1
create view v2 as
select
a, b,
(select max(c) from t20 where t20.a<=t2.a) as SUBQ1,
(select max(c) from t21 where t21.a<=t2.a) as SUBQ2
from t2;
# test partial elimination
explain
select
a,
a in (select a from v2 where a>3 and v2.SUBQ2>=0 group by v2.SUBQ1, v2.SUBQ2)
from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 10 Using where
# test buried subselects in group by clause
select a, a in
(
select
(
select max(c) from t20 where t20.a<=t2.a
)*2 as SUBQ1 from t2 group by SUBQ1+1
) as COL
from t1;
a COL
1 0
2 1
3 0
4 1
5 0
6 1
7 0
8 1
9 0
10 1
drop view v2;
drop table t1, t2, t20, t21, t3;
# Testcase from MDEV-32311
SELECT (
( WITH x ( x ) AS
(SELECT ( SELECT 'x' UNION SELECT 'x' ) FROM ( SELECT ( 'x' ) ) x)
SELECT x FROM x
WHERE x IN ( ( SELECT 'x' AND x GROUP BY x ) )
)
) AS SUBQ;
SUBQ
x
# MDEV-32390:
CREATE TABLE t0 ( c43 DECIMAL ( 31 ) DEFAULT ( 45 ) ) ;
INSERT INTO t0 VALUES ( 13 ) , ( 29 ) ;
ALTER TABLE t0 ADD COLUMN c24 INT AFTER c43 ;
INSERT INTO t0 VALUES ( DEFAULT , DEFAULT ) , ( DEFAULT , DEFAULT ) ;
SELECT t1 . c22 AS c9 FROM ( SELECT ( SELECT + EXISTS ( SELECT -128 AS c29 ) <<
LOCATE ( t0 . c43 , t0 . c24 <= t0 . c24 NOT BETWEEN 4642475734208631537 AND
-108 , NULLIF ( 57 , -8 ) SOUNDS LIKE TRIM( TRAILING FROM 6107036197732405580 )
) - t0 . c43 AS c57 FROM t0 LIMIT 1 ) AS c22 FROM t0 ) AS t1 HAVING TRIM( CASE
t1 . c22 WHEN -16 THEN RAND ( ) % HEX ( t1 . c22 ) - SUBSTRING_INDEX ( t1 . c22,
':A9SEZxtjN,fKN*zR' , 'V*vhJb}&c%Op,[T[S,j`F9NDsK;\'8 4;m"
P,ce}1r"3ID1DN' ) >> NULLIF ( t1 . c22 , -95 ) ELSE -2 END IS TRUE
FROM t1 . c22 >= EXISTS ( SELECT t2 . c57 AS c59 FROM ( SELECT CASE c24 WHEN
-103 THEN 85 ELSE 22 END IS TRUE AS c57 FROM t0 ) AS t2 WHERE MOD ( 64 , 46 ) =
CONVERT ( 73 , BINARY ) % RAND ( ) IS NOT NULL = -65 GROUP BY c57 , c22 , c22
WINDOW w0 AS ( PARTITION BY t2 . c57 ) ) & PI ( ) ) ;
c9
DROP TABLE t0;
# MDEV-32309
SELECT
( WITH x ( x ) AS
(
WITH x ( x ) AS ( SELECT 1 ) SELECT ( SELECT x ) FROM x
)
SELECT x FROM x WHERE x IN ( SELECT NULL GROUP BY x )
) as col1 ;
col1
NULL
# MDEV-32391
CREATE TABLE t0 ( c15 INT , c33 INT ) engine=innodb;
INSERT INTO t0 ( c15 ) WITH t1 AS ( SELECT SQRT ( 123 ) NOT
REGEXP MOD ( 91 , -121 ) = ALL ( SELECT c15 AS c33 FROM t0 ) AS c49 FROM t0 )
SELECT t1 . c49 IS UNKNOWN AS c59 FROM t1 CROSS JOIN t0 AS t2
WHERE t1 . c49 = + EXISTS ( SELECT -5839312620871436105 AS c17 GROUP BY c49 )
BETWEEN -109 AND CHAR_LENGTH ( 2694839150676403988 ) - - LOWER ( -13 ) ;
DROP TABLE t0;
# MDEV-28620
CREATE TABLE t1 ( a int);
INSERT INTO t1 VALUES (1),(2);
SELECT EXISTS
( SELECT 1 FROM t1 GROUP BY 1 IN (SELECT a FROM t1)
ORDER BY a + (SELECT 1 FROM t1 WHERE (1,2) NOT IN (SELECT 1,0))
) as SUBQ;
SUBQ
1
DROP TABLE t1;
# MDEV-30842 Item_subselect::get_cache_parameters and UBSAN member
# access within null pointer
CREATE TABLE x (x INT) ENGINE=InnoDB;
INSERT INTO x (x) VALUES (0);
INSERT INTO x (x) VALUES (x IN (SELECT (SELECT x FROM (SELECT x FROM
(SELECT 0 IN (SELECT x=0 FROM (SELECT x FROM (SELECT (SELECT (SELECT (SELECT
(SELECT 0 AS x) FROM x AS x) IN (SELECT 0 AS x) AS x) FROM x AS x) IN
(SELECT x WHERE x=0) AS x FROM x AS x) AS x) AS x GROUP BY x) AS x FROM x) AS x)
AS x) IN (SELECT 0 AS x) AS x FROM x));
ERROR HY000: Table 'x' is specified twice, both as a target for 'INSERT' and as a separate source for data
DROP TABLE x;
# MDEV-28622: Item_subselect eliminated flag set but Item still
# evaluated/used.
CREATE TABLE t1 ( a int) ;
CREATE VIEW v1 (i) AS SELECT EXISTS(SELECT 1) FROM t1;
SELECT 1 FROM v1 WHERE i NOT IN (SELECT i = 0 FROM v1 WHERE i = -1 GROUP BY i);
1
DROP TABLE t1;
DROP VIEW v1;
CREATE TABLE t(c1 INT);
SELECT 0
WHERE 0 IN
(
SELECT 0 FROM
(
SELECT 0 IN
(
SELECT
(
SELECT c1 FROM t
)
) AS c
FROM t
) AS dt
WHERE c GROUP BY c
);
0
DROP TABLE t;
create table t1 (a int, b int, c int);
insert into t1 select seq, seq, seq from seq_1_to_10;
create table t2 as select * from t1;
create table t20 as select * from t1;
create table t3 as select * from t1;
create view v2 as
select
a, b, (select max(c) from t20 where t20.a<=t2.a) as SUBQ1
from t2;
explain
select
a, a in (select a from v2 where a>3 group by v2.SUBQ1)
from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 10 Using where
prepare s from '
explain
select
a, a in (select a from v2 where a>3 group by v2.SUBQ1)
from t1';
execute s;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 10 Using where
execute s;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 10 Using where
execute s;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 10 Using where
prepare s from '
explain
select
a, a in (select a from v2 where a>3 and SUBQ1+1 group by v2.SUBQ1)
from t1';
execute s;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 10 Using where
execute s;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 10 Using where
execute s;
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 10 Using where
create procedure p1()
begin
explain
select
a, a in (select a from v2 where a>3 group by v2.SUBQ1)
from t1;
end//
create procedure p2()
begin
explain
select
a, a in (select a from v2 where a>3 and SUBQ1+1 group by v2.SUBQ1)
from t1;
end//
call p1();
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 10 Using where
call p1();
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 10 Using where
call p2();
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 10 Using where
call p2();
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t1 ALL NULL NULL NULL NULL 10
2 MATERIALIZED t2 ALL NULL NULL NULL NULL 10 Using where
drop procedure p1;
drop procedure p2;
drop view v2;
drop table t1,t2,t3,t20;
# end of 10.4 tests
mysql-test/main/subselect_elimination.test 0 → 100644
View file @ cb73bc11
--source include/have_innodb.inc
--source include/have_sequence.inc
--echo #
--echo # MDEV-28621 group by optimization incorrectly removing subquery where
--echo # subject buried in a function
--echo #
CREATE TABLE t1 (i int) ;
INSERT INTO t1 VALUES (1),(2),(3);
--error ER_SUBQUERY_NO_1_ROW
SELECT 1 FROM t1
WHERE i in
( SELECT a+1
FROM
(SELECT (SELECT i FROM (SELECT 1 FROM t1) dt) AS a FROM t1) dt2
GROUP BY a
);
DROP TABLE t1;
create table t1 (a int, b int, c int);
insert into t1 select seq, seq, seq from seq_1_to_10;
create table t2 as select * from t1;
create table t20 as select * from t1;
create table t21 as select * from t1;
create table t3 as select * from t1;
select a, a in
(
select
(
select max(c) from t20 where t20.a<=t2.a
) as SUBQ1 from t2 group by SUBQ1+1
) as COL
from t1;
create view v2 as
select
a, b,
(select max(c) from t20 where t20.a<=t2.a) as SUBQ1,
(select max(c) from t21 where t21.a<=t2.a) as SUBQ2
from t2;
--echo # test partial elimination
explain
select
a,
a in (select a from v2 where a>3 and v2.SUBQ2>=0 group by v2.SUBQ1, v2.SUBQ2)
from t1;
--echo # test buried subselects in group by clause
select a, a in
(
select
(
select max(c) from t20 where t20.a<=t2.a
)*2 as SUBQ1 from t2 group by SUBQ1+1
) as COL
from t1;
drop view v2;
drop table t1, t2, t20, t21, t3;
--echo # Testcase from MDEV-32311
# some warning duplicated using ps-protocol
--disable_warnings
SELECT (
( WITH x ( x ) AS
(SELECT ( SELECT 'x' UNION SELECT 'x' ) FROM ( SELECT ( 'x' ) ) x)
SELECT x FROM x
WHERE x IN ( ( SELECT 'x' AND x GROUP BY x ) )
)
) AS SUBQ;
--enable_warnings
--echo # MDEV-32390:
CREATE TABLE t0 ( c43 DECIMAL ( 31 ) DEFAULT ( 45 ) ) ;
INSERT INTO t0 VALUES ( 13 ) , ( 29 ) ;
ALTER TABLE t0 ADD COLUMN c24 INT AFTER c43 ;
INSERT INTO t0 VALUES ( DEFAULT , DEFAULT ) , ( DEFAULT , DEFAULT ) ;
SELECT t1 . c22 AS c9 FROM ( SELECT ( SELECT + EXISTS ( SELECT -128 AS c29 ) <<
LOCATE ( t0 . c43 , t0 . c24 <= t0 . c24 NOT BETWEEN 4642475734208631537 AND
-108 , NULLIF ( 57 , -8 ) SOUNDS LIKE TRIM( TRAILING FROM 6107036197732405580 )
) - t0 . c43 AS c57 FROM t0 LIMIT 1 ) AS c22 FROM t0 ) AS t1 HAVING TRIM( CASE
t1 . c22 WHEN -16 THEN RAND ( ) % HEX ( t1 . c22 ) - SUBSTRING_INDEX ( t1 . c22,
':A9SEZxtjN,fKN*zR' , 'V*vhJb}&c%Op,[T[S,j`F9NDsK;\'8 4;m"
P,ce}1r"3ID1DN' ) >> NULLIF ( t1 . c22 , -95 ) ELSE -2 END IS TRUE
FROM t1 . c22 >= EXISTS ( SELECT t2 . c57 AS c59 FROM ( SELECT CASE c24 WHEN
-103 THEN 85 ELSE 22 END IS TRUE AS c57 FROM t0 ) AS t2 WHERE MOD ( 64 , 46 ) =
CONVERT ( 73 , BINARY ) % RAND ( ) IS NOT NULL = -65 GROUP BY c57 , c22 , c22
WINDOW w0 AS ( PARTITION BY t2 . c57 ) ) & PI ( ) ) ;
DROP TABLE t0;
--echo # MDEV-32309
SELECT
( WITH x ( x ) AS
(
WITH x ( x ) AS ( SELECT 1 ) SELECT ( SELECT x ) FROM x
)
SELECT x FROM x WHERE x IN ( SELECT NULL GROUP BY x )
) as col1 ;
--echo # MDEV-32391
CREATE TABLE t0 ( c15 INT , c33 INT ) engine=innodb;
INSERT INTO t0 ( c15 ) WITH t1 AS ( SELECT SQRT ( 123 ) NOT
REGEXP MOD ( 91 , -121 ) = ALL ( SELECT c15 AS c33 FROM t0 ) AS c49 FROM t0 )
SELECT t1 . c49 IS UNKNOWN AS c59 FROM t1 CROSS JOIN t0 AS t2
WHERE t1 . c49 = + EXISTS ( SELECT -5839312620871436105 AS c17 GROUP BY c49 )
BETWEEN -109 AND CHAR_LENGTH ( 2694839150676403988 ) - - LOWER ( -13 ) ;
DROP TABLE t0;
--echo # MDEV-28620
CREATE TABLE t1 ( a int);
INSERT INTO t1 VALUES (1),(2);
SELECT EXISTS
( SELECT 1 FROM t1 GROUP BY 1 IN (SELECT a FROM t1)
ORDER BY a + (SELECT 1 FROM t1 WHERE (1,2) NOT IN (SELECT 1,0))
) as SUBQ;
DROP TABLE t1;
--echo # MDEV-30842 Item_subselect::get_cache_parameters and UBSAN member
--echo # access within null pointer
CREATE TABLE x (x INT) ENGINE=InnoDB;
INSERT INTO x (x) VALUES (0);
--error ER_UPDATE_TABLE_USED
INSERT INTO x (x) VALUES (x IN (SELECT (SELECT x FROM (SELECT x FROM
(SELECT 0 IN (SELECT x=0 FROM (SELECT x FROM (SELECT (SELECT (SELECT (SELECT
(SELECT 0 AS x) FROM x AS x) IN (SELECT 0 AS x) AS x) FROM x AS x) IN
(SELECT x WHERE x=0) AS x FROM x AS x) AS x) AS x GROUP BY x) AS x FROM x) AS x)
AS x) IN (SELECT 0 AS x) AS x FROM x));
DROP TABLE x;
--echo # MDEV-28622: Item_subselect eliminated flag set but Item still
--echo # evaluated/used.
CREATE TABLE t1 ( a int) ;
CREATE VIEW v1 (i) AS SELECT EXISTS(SELECT 1) FROM t1;
SELECT 1 FROM v1 WHERE i NOT IN (SELECT i = 0 FROM v1 WHERE i = -1 GROUP BY i);
DROP TABLE t1;
DROP VIEW v1;
CREATE TABLE t(c1 INT);
SELECT 0
WHERE 0 IN
(
SELECT 0 FROM
(
SELECT 0 IN
(
SELECT
(
SELECT c1 FROM t
)
) AS c
FROM t
) AS dt
WHERE c GROUP BY c
);
DROP TABLE t;
create table t1 (a int, b int, c int);
insert into t1 select seq, seq, seq from seq_1_to_10;
create table t2 as select * from t1;
create table t20 as select * from t1;
create table t3 as select * from t1;
create view v2 as
select
a, b, (select max(c) from t20 where t20.a<=t2.a) as SUBQ1
from t2;
explain
select
a, a in (select a from v2 where a>3 group by v2.SUBQ1)
from t1;
prepare s from '
explain
select
a, a in (select a from v2 where a>3 group by v2.SUBQ1)
from t1';
execute s;
execute s;
execute s;
prepare s from '
explain
select
a, a in (select a from v2 where a>3 and SUBQ1+1 group by v2.SUBQ1)
from t1';
execute s;
execute s;
execute s;
delimiter //;
create procedure p1()
begin
explain
select
a, a in (select a from v2 where a>3 group by v2.SUBQ1)
from t1;
end//
create procedure p2()
begin
explain
select
a, a in (select a from v2 where a>3 and SUBQ1+1 group by v2.SUBQ1)
from t1;
end//
delimiter ;//
call p1();
call p1();
call p2();
call p2();
drop procedure p1;
drop procedure p2;
drop view v2;
drop table t1,t2,t3,t20;
--echo # end of 10.4 tests
sql/item_subselect.cc
View file @ cb73bc11
......@@ -387,9 +387,14 @@ bool Item_subselect::mark_as_eliminated_processor(void *arg)
bool Item_subselect::eliminate_subselect_processor(void *arg)
{
unit->item= NULL;
if (!unit->is_excluded())
unit->exclude();
for (st_select_lex *un= unit->first_select(); un; un= un->next_select())
{
if (st_select_lex_unit *iu= un->first_inner_unit())
{
for (st_select_lex *in= iu->first_select(); in; in= in->next_select())
in->mark_as_belong_to_derived(NULL);
}
}
eliminated= TRUE;
return FALSE;
}
......@@ -769,7 +774,6 @@ bool Item_subselect::exec()
DBUG_ENTER("Item_subselect::exec");
DBUG_ASSERT(fixed);
DBUG_ASSERT(!eliminated);
DBUG_EXECUTE_IF("Item_subselect",
Item::Print print(this,
......
sql/sql_select.cc
View file @ cb73bc11
......@@ -700,6 +700,7 @@ void remove_redundant_subquery_clauses(st_select_lex *subq_select_lex)
}
}
subq_select_lex->join->group_list= NULL;
subq_select_lex->save_group_list= subq_select_lex->group_list;
subq_select_lex->group_list.empty();
DBUG_PRINT("info", ("GROUP BY removed"));
}
......@@ -1366,17 +1367,16 @@ JOIN::prepare(TABLE_LIST *tables_init, COND *conds_init, uint og_num,
DBUG_RETURN(-1);
/*
Permanently remove redundant parts from the query if
Remove redundant parts from the query if
1) This is a subquery
2) This is the first time this query is optimized (since the
transformation is permanent
3) Not normalizing a view. Removal should take place when a
2) Not normalizing a view. Removal should take place when a
query involving a view is optimized, not when the view
is created
3) We are not preparing this statement for later execution
*/
if (select_lex->master_unit()->item && // 1)
select_lex->first_cond_optimization && // 2)
!thd->lex->is_view_context_analysis()) // 3)
!thd->lex->is_view_context_analysis() && // 2)
!thd->stmt_arena->is_stmt_prepare()) // 3)
{
remove_redundant_subquery_clauses(select_lex);
}
......
sql/sql_union.cc
View file @ cb73bc11
......@@ -2776,6 +2776,8 @@ bool st_select_lex::cleanup()
DBUG_PRINT("info", ("select: %p (%u) JOIN %p",
this, select_number, join));
if (save_group_list.elements)
group_list= save_group_list;
cleanup_order(order_list.first);
cleanup_order(group_list.first);
cleanup_ftfuncs(this);
......
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