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mariadb/mysql-test/t/opt_tvc.test
Galina Shalygina 9d97e6010e MDEV-14835 Server crashes in Field_iterator_table::create_item when number of 
elements of BIGINT or YEAR type in the IN list reaches in_predicate_conversion_threshold

The bug appears at the prepare stage when IN-predicate with the long list
of values is converted into IN-subquery. It happens because values in the
right operand of the IN-predicate that have BIGINT or YEAR types are converted
into the Item_int_with_ref.
To fix it in the procedure Item_func_in::create_value_list_for_tvc
real_item() is taken for each value in the right operand of the IN-predicate.
2018-02-20 21:56:52 +02:00

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#
# MDEV-12176 Transform [NOT] IN predicate with long list of values INTO [NOT] IN subquery
#
source include/have_debug.inc;
create table t1 (a int, b int);
insert into t1
values (1,2), (4,6), (9,7),
(1,1), (2,5), (7,8);
create table t2 (a int, b int, c int);
insert into t2
values (1,2,3), (5,1,2), (4,3,7),
(8,9,0), (10,7,1), (5,5,1);
create table t3 (a int, b varchar(16), index idx(a));
insert into t3 values
(1, "abc"), (3, "egh"), (8, "axxx"), (10, "abc"),
(2, "ccw"), (8, "wqqe"), (7, "au"), (9, "waa"),
(3, "rass"), (9, "ert"), (9, "lok"), (8, "aww"),
(1, "todd"), (3, "rew"), (8, "aww"), (3, "sw"),
(11, "llk"), (7, "rbw"), (1, "sm"), (2, "jyp"),
(4, "yq"), (5, "pled"), (12, "ligin"), (12, "toww"),
(6, "mxm"), (15, "wanone"), (9, "sunqq"), (2, "abe");
--echo # optimization is not used
let $query= select * from t1 where a in (1,2);
eval $query;
eval explain extended $query;
--echo # set minimum number of values in VALUEs list when optimization works to 2
set @@in_predicate_conversion_threshold= 2;
--echo # single IN-predicate in WHERE-part
let $query= select * from t1 where a in (1,2);
let $optimized_query=
select * from t1
where a in
(
select *
from (values (1),(2)) as tvc_0
);
eval $query;
eval $optimized_query;
eval explain extended $query;
eval explain extended $optimized_query;
--echo # AND-condition with IN-predicates in WHERE-part
let $query=
select * from t1
where a in (1,2) and
b in (1,5);
let $optimized_query=
select * from t1
where a in
(
select *
from (values (1),(2)) as tvc_0
)
and b in
(
select *
from (values (1),(5)) as tvc_1
);
eval $query;
eval $optimized_query;
eval explain extended $query;
eval explain extended $optimized_query;
--echo # subquery with IN-predicate
let $query=
select * from t1
where a in
(
select a
from t2 where b in (3,4)
);
let $optimized_query=
select * from t1
where a in
(
select a from t2
where b in
(
select *
from (values (3),(4)) as tvc_0
)
);
eval $query;
eval $optimized_query;
eval explain extended $query;
eval explain extended $optimized_query;
--echo # derived table with IN-predicate
let $query=
select * from
(
select *
from t1
where a in (1,2)
) as dr_table;
let $optimized_query=
select * from
(
select *
from t1
where a in
(
select *
from (values (1),(2))
as tvc_0
)
) as dr_table;
eval $query;
eval $optimized_query;
eval explain extended $query;
eval explain extended $optimized_query;
--echo # non-recursive CTE with IN-predicate
let $cte_query=
with tvc_0 as
(
select *
from t1
where a in (1,2)
)
select * from tvc_0;
eval $cte_query;
eval $optimized_query;
eval explain extended $cte_query;
eval explain extended $optimized_query;
--echo # VIEW with IN-predicate
create view v1 as
select *
from t1
where a in (1,2);
create view v2 as
select *
from t1
where a in
(
select *
from (values (1),(2))
as tvc_0
)
;
let $query= select * from v1;
let $optimized_query= select * from v2;
eval $query;
eval $optimized_query;
eval explain extended $query;
eval explain extended $optimized_query;
drop view v1,v2;
--echo # subselect defined by derived table with IN-predicate
let $query=
select * from t1
where a in
(
select 1
from
(
select *
from t1
where a in (1,2)
)
as dr_table
);
let $optimized_query=
select * from t1
where a in
(
select 1
from
(
select *
from t1
where a in
(
select *
from (values (1),(2))
as tvc_0
)
)
as dr_table
);
eval $query;
eval $optimized_query;
eval explain extended $query;
eval explain extended $optimized_query;
--echo # derived table with IN-predicate and group by
let $query=
select * from
(
select max(a),b
from t1
where b in (3,5)
group by b
) as dr_table;
let $optimized_query=
select * from
(
select max(a),b
from t1
where b in
(
select *
from (values (3),(5))
as tvc_0
)
group by b
) as dr_table;
eval $query;
eval $optimized_query;
eval explain extended $query;
eval explain extended $optimized_query;
--echo # prepare statement
prepare stmt from "select * from t1 where a in (1,2)";
execute stmt;
execute stmt;
deallocate prepare stmt;
--echo # use inside out access from tvc rows
let $query= select * from t3 where a in (1,4,10);
set @@in_predicate_conversion_threshold= default;
eval $query;
eval explain extended $query;
set @@in_predicate_conversion_threshold= 2;
eval $query;
eval explain extended $query;
--echo # use vectors in IN predeicate
set @@in_predicate_conversion_threshold= 4;
let $query=
select * from t1 where (a,b) in ((1,2),(3,4));
eval $query;
eval explain extended $query;
set @@in_predicate_conversion_threshold= 2;
--echo # trasformation works for the one IN predicate and doesn't work for the other
set @@in_predicate_conversion_threshold= 5;
let $query=
select * from t2
where (a,b) in ((1,2),(8,9)) and
(a,c) in ((1,3),(8,0),(5,1));
eval $query;
eval explain extended $query;
set @@in_predicate_conversion_threshold= 2;
--echo #
--echo # mdev-14281: conversion of NOT IN predicate into subquery predicate
--echo #
let $query=
select * from t1
where (a,b) not in ((1,2),(8,9), (5,1));
let $optimized_query=
select * from t1
where (a,b) not in (select * from (values (1,2),(8,9), (5,1)) as tvc_0);
eval $query;
eval $optimized_query;
eval explain extended $query;
eval explain extended $optimized_query;
let $query=
select * from t1
where b < 7 and (a,b) not in ((1,2),(8,9), (5,1));
eval $query;
eval explain extended $query;
let $query=
select * from t2
where (a,c) not in ((1,2),(8,9), (5,1));
eval $query;
eval explain extended $query;
drop table t1, t2, t3;
set @@in_predicate_conversion_threshold= default;
--echo #
--echo # MDEV-14947: conversion of TVC with only NULL values
--echo #
CREATE TABLE t1 (i INT);
INSERT INTO t1 VALUES (3), (2), (7);
let $q=
SELECT * FROM t1 WHERE i IN (NULL, NULL, NULL, NULL, NULL);
eval $q;
eval EXPLAIN EXTENDED $q;
SET in_predicate_conversion_threshold= 5;
eval $q;
eval EXPLAIN EXTENDED $q;
SET in_predicate_conversion_threshold= default;
DROP TABLE t1;
--echo #
--echo # MDEV-14835: conversion of TVC with BIGINT or YEAR values
--echo #
SET @@in_predicate_conversion_threshold= 2;
CREATE TABLE t1 (a BIGINT);
CREATE TABLE t2 (y YEAR);
INSERT INTO t1 VALUES (1), (2), (3);
INSERT INTO t2 VALUES (2009), (2010), (2011);
SELECT * FROM t1 WHERE a IN ('1','5','3');
SELECT * FROM t2 WHERE y IN ('2009','2011');
DROP TABLE t1,t2;
SET @@in_predicate_conversion_threshold= default;
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