mysql-test/main/opt_tvc.test

#
# MDEV-12176 Transform [NOT] IN predicate with long list of values INTO [NOT] IN subquery
#
source include/have_debug.inc;
source include/default_optimizer_switch.inc;
source include/have_sequence.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);
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 to 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 to 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;

--echo #
--echo # MDEV-17222: conversion to TVC with no names for constants
--echo #             conversion to TVC with the same constants in the first row
--echo #

SET @@in_predicate_conversion_threshold= 2;

CREATE TABLE t1 (f BINARY(16)) ENGINE=MYISAM;
INSERT INTO t1 VALUES
(x'BAE56AF2B1C2397D99D58E2A06761DDB'), (x'9B9B698BCCB939EE8F1EA56C1A2E5DAA'),
(x'A0A1C4FE39A239BABD3E0D8985E6BEA5');

SELECT COUNT(*) FROM t1 WHERE f IN
(x'9B9B698BCCB939EE8F1EA56C1A2E5DAA', x'E2362DBAB5EA30B5804917A0A7D881E2',
 x'B78B2EEAD13635088D93EA3309E24802', x'BAE56AF2B1C2397D99D58E2A06761DDB');

CREATE TABLE t2 (f1 BINARY(16), f2 BINARY(16)) ENGINE=MYISAM;
INSERT INTO t2 VALUES
(x'55FB3B14D6B83D39859E42533906350D', x'00F3458C47FA39DDBEAD918A13F8342E'),
(x'86052C062AAF368D84247ED0F6346A70', x'BF5C35045C6037C79E11026ABB9A3A4E');

SELECT COUNT(*) FROM t2 WHERE (f1,f2) IN
((x'9B9B698BCCB939EE8F1EA56C1A2E5DAA', x'E2362DBAB5EA30B5804917A0A7D881E2'),
 (x'B78B2EEAD13635088D93EA3309E24802', x'BAE56AF2B1C2397D99D58E2A06761DDB'),
 (x'55FB3B14D6B83D39859E42533906350D', x'00F3458C47FA39DDBEAD918A13F8342E'),
 (x'1606014E7C4A312F83EDC9D91BBFCACA', x'33F6068E56FD3A1D8326517F0D81CB5A'));

CREATE TABLE t3 (f1 int, f2 int) ENGINE=MYISAM;
INSERT INTO t3 VALUES (2,5), (2,3), (1,2), (7,8), (1,1);

SELECT * FROM t3 WHERE (f1,f2) IN ((2, 2), (1, 2), (3, 5), (1, 1));

DROP TABLE t1,t2,t3;

SET @@in_predicate_conversion_threshold= default;

--echo #
--echo # MDEV-20900: IN predicate to IN subquery conversion causes performance regression
--echo #

create table t1(a int, b int);
insert into t1 select seq-1, seq-1 from seq_1_to_10;

set in_predicate_conversion_threshold=2;

let $query= select * from t1 where t1.a IN ("1","2","3","4");
eval explain $query;
eval $query;

set in_predicate_conversion_threshold=0;
eval explain $query;
eval $query;

set in_predicate_conversion_threshold=2;
let $query= select * from t1 where (t1.a,t1.b) in (("1","1"),(2,2),(3,3),(4,4));
eval explain $query;
eval $query;

set in_predicate_conversion_threshold=0;
eval explain $query;
eval $query;

drop table t1;
SET @@in_predicate_conversion_threshold= default;