mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 03:52:35 +01:00
727491b72a
This includes all test changes from
"Changing all cost calculation to be given in milliseconds"
and forwards.
Some of the things that caused changes in the result files:
- As part of fixing tests, I added 'echo' to some comments to be able to
easier find out where things where wrong.
- MATERIALIZED has now a higher cost compared to X than before. Because
of this some MATERIALIZED types have changed to DEPENDEND SUBQUERY.
- Some test cases that required MATERIALIZED to repeat a bug was
changed by adding more rows to force MATERIALIZED to happen.
- 'Filtered' in SHOW EXPLAIN has in many case changed from 100.00 to
something smaller. This is because now filtered also takes into
account the smallest possible ref access and filters, even if they
where not used. Another reason for 'Filtered' being smaller is that
we now also take into account implicit filtering done for subqueries
using FIRSTMATCH.
(main.subselect_no_exists_to_in)
This is caluculated in best_access_path() and stored in records_out.
- Table orders has changed because more accurate costs.
- 'index' and 'ALL' for small tables has changed to use 'range' or
'ref' because of optimizer_scan_setup_cost.
- index can be changed to 'range' as 'range' optimizer assumes we don't
have to read the blocks from disk that range optimizer has already read.
This can be confusing in the case where there is no obvious where clause
but instead there is a hidden 'key_column > NULL' added by the optimizer.
(main.subselect_no_exists_to_in)
- Scan on primary clustered key does not report 'Using Index' anymore
(It's a table scan, not an index scan).
- For derived tables, the number of rows is now 100 instead of 2,
which can be seen in EXPLAIN.
- More tests have "Using index for group by" as the cost of this
optimization is now more correct (lower).
- A primary key could be preferred for a normal key, even if it would
access more rows, as it's faster to do 1 lokoup and 3 'index_next' on a
clustered primary key than one lookup trough a secondary.
(main.stat_tables_innodb)
Notes:
- There was a 4.7% more calls to best_extension_by_limited_search() in
the main.greedy_optimizer test. However examining the test results
it looked that the plans where slightly better (eq_ref where more
chained together) so I assume this is ok.
- I have verified a few test cases where there was notable/unexpected
changes in the plan and in all cases the new optimizer plans where
faster. (main.greedy_optimizer and some others)
782 lines
26 KiB
Text
782 lines
26 KiB
Text
create table t1 (a int, b int);
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insert into t1
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values (1,2), (4,6), (9,7),
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(1,1), (2,5), (7,8);
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create table t2 (a int, b int, c int);
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insert into t2
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values (1,2,3), (5,1,2), (4,3,7),
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(8,9,0), (10,7,1), (5,5,1);
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create table t3 (a int, b varchar(16), index idx(a));
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insert into t3 values
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(1, "abc"), (3, "egh"), (8, "axxx"), (10, "abc"),
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(2, "ccw"), (8, "wqqe"), (7, "au"), (9, "waa"),
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(3, "rass"), (9, "ert"), (9, "lok"), (8, "aww"),
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(1, "todd"), (3, "rew"), (8, "aww"), (3, "sw"),
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(11, "llk"), (7, "rbw"), (1, "sm"), (2, "jyp"),
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(4, "yq"), (5, "pled"), (12, "ligin"), (12, "toww"),
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(6, "mxm"), (15, "wanone"), (9, "sunqq"), (2, "abe");
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# optimization is not used
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select * from t1 where a in (1,2);
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a b
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1 2
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1 1
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2 5
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explain extended select * from t1 where a in (1,2);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 6 100.00 Using where
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Warnings:
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Note 1003 select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where `test`.`t1`.`a` in (1,2)
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# set minimum number of values in VALUEs list when optimization works to 2
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set @@in_predicate_conversion_threshold= 2;
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# single IN-predicate in WHERE-part
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select * from t1 where a in (1,2);
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a b
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1 2
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1 1
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2 5
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select * from t1
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where a in
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(
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select *
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from (values (1),(2)) as tvc_0
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);
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a b
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1 2
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1 1
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2 5
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explain extended select * from t1 where a in (1,2);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
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1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
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3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`_col_1` = `test`.`t1`.`a`
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explain extended select * from t1
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where a in
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(
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select *
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from (values (1),(2)) as tvc_0
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);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
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1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
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3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`1` = `test`.`t1`.`a`
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select * from t1 where a in (1,2,2,2,3,4,5,6,7);
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a b
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1 2
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4 6
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1 1
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2 5
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7 8
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select * from t1
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where a in
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(
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select *
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from (values (1),(2),(2),(2),(2),(3),(4),(5),(6),(7)) as tvc_0
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);
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a b
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1 2
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4 6
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1 1
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2 5
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7 8
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explain extended select * from t1 where a in (1,2,2,2,3,4,5,6,7);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
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1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
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3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2),(2),(2),(3),(4),(5),(6),(7)) `tvc_0` join `test`.`t1` where `tvc_0`.`_col_1` = `test`.`t1`.`a`
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explain extended select * from t1
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where a in
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(
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select *
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from (values (1),(2),(2),(2),(2),(3),(4),(5),(6),(7)) as tvc_0
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);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
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1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
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3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2),(2),(2),(2),(3),(4),(5),(6),(7)) `tvc_0` join `test`.`t1` where `tvc_0`.`1` = `test`.`t1`.`a`
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# AND-condition with IN-predicates in WHERE-part
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select * from t1
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where a in (1,2) and
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b in (1,5);
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a b
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1 1
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2 5
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select * from t1
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where a in
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(
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select *
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from (values (1),(2)) as tvc_0
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)
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and b in
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(
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select *
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from (values (1),(5)) as tvc_1
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);
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a b
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1 1
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2 5
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explain extended select * from t1
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where a in (1,2) and
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b in (1,5);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
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1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
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1 PRIMARY <derived5> eq_ref distinct_key distinct_key 4 test.t1.b 1 100.00
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5 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(5)) `tvc_1` join (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`_col_1` = `test`.`t1`.`a` and `tvc_1`.`_col_1` = `test`.`t1`.`b`
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explain extended select * from t1
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where a in
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(
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select *
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from (values (1),(2)) as tvc_0
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)
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and b in
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(
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select *
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from (values (1),(5)) as tvc_1
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);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
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1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
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1 PRIMARY <derived5> eq_ref distinct_key distinct_key 4 test.t1.b 1 100.00
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5 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(5)) `tvc_1` join (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`1` = `test`.`t1`.`a` and `tvc_1`.`1` = `test`.`t1`.`b`
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# subquery with IN-predicate
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select * from t1
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where a in
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(
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select a
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from t2 where b in (3,4)
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);
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a b
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4 6
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select * from t1
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where a in
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(
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select a from t2
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where b in
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(
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select *
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from (values (3),(4)) as tvc_0
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)
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);
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a b
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4 6
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explain extended select * from t1
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where a in
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(
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select a
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from t2 where b in (3,4)
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);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
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2 MATERIALIZED t2 ALL NULL NULL NULL NULL 6 100.00 Using where
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2 MATERIALIZED <derived4> eq_ref distinct_key distinct_key 4 test.t2.b 1 100.00
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4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (3),(4)) `tvc_0` join `test`.`t2`) where `tvc_0`.`_col_1` = `test`.`t2`.`b`
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explain extended select * from t1
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where a in
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(
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select a from t2
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where b in
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(
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select *
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from (values (3),(4)) as tvc_0
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)
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);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
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2 MATERIALIZED t2 ALL NULL NULL NULL NULL 6 100.00 Using where
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2 MATERIALIZED <derived4> eq_ref distinct_key distinct_key 4 test.t2.b 1 100.00
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4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (3),(4)) `tvc_0` join `test`.`t2`) where `tvc_0`.`3` = `test`.`t2`.`b`
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# derived table with IN-predicate
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select * from
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(
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select *
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from t1
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where a in (1,2)
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) as dr_table;
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a b
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1 2
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1 1
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2 5
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select * from
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(
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select *
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from t1
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where a in
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(
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select *
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from (values (1),(2))
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as tvc_0
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)
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) as dr_table;
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a b
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1 2
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1 1
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2 5
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explain extended select * from
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(
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select *
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from t1
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where a in (1,2)
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) as dr_table;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
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1 PRIMARY <derived4> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
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4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`_col_1` = `test`.`t1`.`a`
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explain extended select * from
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(
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select *
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from t1
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where a in
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(
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select *
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from (values (1),(2))
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as tvc_0
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)
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) as dr_table;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
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1 PRIMARY <derived4> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
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4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`1` = `test`.`t1`.`a`
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# non-recursive CTE with IN-predicate
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with tvc_0 as
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(
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select *
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from t1
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where a in (1,2)
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)
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select * from tvc_0;
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a b
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1 2
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1 1
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2 5
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select * from
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(
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select *
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from t1
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where a in
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(
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select *
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from (values (1),(2))
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as tvc_0
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)
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) as dr_table;
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a b
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1 2
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1 1
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2 5
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explain extended with tvc_0 as
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(
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select *
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from t1
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where a in (1,2)
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)
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select * from tvc_0;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
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1 PRIMARY <derived4> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
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4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 with tvc_0 as (/* select#2 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (dual) join `test`.`t1` where `test`.`t1`.`a` in (1,2))/* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`_col_1` = `test`.`t1`.`a`
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explain extended select * from
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(
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select *
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from t1
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where a in
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(
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select *
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from (values (1),(2))
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as tvc_0
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)
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) as dr_table;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
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1 PRIMARY <derived4> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
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4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`1` = `test`.`t1`.`a`
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# VIEW with IN-predicate
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create view v1 as
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select *
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from t1
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where a in (1,2);
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create view v2 as
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select *
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from t1
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where a in
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(
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select *
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from (values (1),(2))
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as tvc_0
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)
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;
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select * from v1;
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a b
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1 2
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1 1
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2 5
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select * from v2;
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a b
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1 2
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1 1
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2 5
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explain extended select * from v1;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
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1 PRIMARY <derived4> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
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4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`_col_1` = `test`.`t1`.`a`
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explain extended select * from v2;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
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1 PRIMARY <derived4> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
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4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
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Warnings:
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Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1),(2)) `tvc_0` join `test`.`t1` where `tvc_0`.`1` = `test`.`t1`.`a`
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drop view v1,v2;
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# subselect defined by derived table with IN-predicate
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select * from t1
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where a in
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(
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select 1
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from
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(
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select *
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from t1
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where a in (1,2)
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)
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as dr_table
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);
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a b
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1 2
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1 1
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select * from t1
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where a in
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(
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select 1
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from
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(
|
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select *
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from t1
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|
where a in
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(
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select *
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from (values (1),(2))
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as tvc_0
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)
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)
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as dr_table
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);
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a b
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1 2
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1 1
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explain extended select * from t1
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where a in
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(
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select 1
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from
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(
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select *
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from t1
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|
where a in (1,2)
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|
)
|
|
as dr_table
|
|
);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
|
|
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
|
|
2 MATERIALIZED t1 ALL NULL NULL NULL NULL 6 100.00 Using where
|
|
2 MATERIALIZED <derived5> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
|
|
5 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0` join `test`.`t1`) where `test`.`t1`.`a` = 1 and `tvc_0`.`_col_1` = `test`.`t1`.`a`
|
|
explain extended 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
|
|
);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
|
|
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
|
|
2 MATERIALIZED t1 ALL NULL NULL NULL NULL 6 100.00 Using where
|
|
2 MATERIALIZED <derived5> eq_ref distinct_key distinct_key 4 test.t1.a 1 100.00
|
|
5 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` semi join ((values (1),(2)) `tvc_0` join `test`.`t1`) where `test`.`t1`.`a` = 1 and `tvc_0`.`1` = `test`.`t1`.`a`
|
|
# derived table with IN-predicate and group by
|
|
select * from
|
|
(
|
|
select max(a),b
|
|
from t1
|
|
where b in (3,5)
|
|
group by b
|
|
) as dr_table;
|
|
max(a) b
|
|
2 5
|
|
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;
|
|
max(a) b
|
|
2 5
|
|
explain extended select * from
|
|
(
|
|
select max(a),b
|
|
from t1
|
|
where b in (3,5)
|
|
group by b
|
|
) as dr_table;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 100.00
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort
|
|
2 DERIVED <derived4> eq_ref distinct_key distinct_key 4 test.t1.b 1 100.00
|
|
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `dr_table`.`max(a)` AS `max(a)`,`dr_table`.`b` AS `b` from (/* select#2 */ select max(`test`.`t1`.`a`) AS `max(a)`,`test`.`t1`.`b` AS `b` from (values (3),(5)) `tvc_0` join `test`.`t1` where `tvc_0`.`_col_1` = `test`.`t1`.`b` group by `test`.`t1`.`b`) `dr_table`
|
|
explain extended 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;
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY <derived2> ALL NULL NULL NULL NULL 6 100.00
|
|
2 DERIVED t1 ALL NULL NULL NULL NULL 6 100.00 Using where; Using temporary; Using filesort
|
|
2 DERIVED <derived4> eq_ref distinct_key distinct_key 4 test.t1.b 1 100.00
|
|
4 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `dr_table`.`max(a)` AS `max(a)`,`dr_table`.`b` AS `b` from (/* select#2 */ select max(`test`.`t1`.`a`) AS `max(a)`,`test`.`t1`.`b` AS `b` from (values (3),(5)) `tvc_0` join `test`.`t1` where `tvc_0`.`3` = `test`.`t1`.`b` group by `test`.`t1`.`b`) `dr_table`
|
|
# prepare statement
|
|
prepare stmt from "select * from t1 where a in (1,2)";
|
|
execute stmt;
|
|
a b
|
|
1 2
|
|
1 1
|
|
2 5
|
|
execute stmt;
|
|
a b
|
|
1 2
|
|
1 1
|
|
2 5
|
|
deallocate prepare stmt;
|
|
# use inside out access from tvc rows
|
|
set @@in_predicate_conversion_threshold= default;
|
|
select * from t3 where a in (1,4);
|
|
a b
|
|
1 abc
|
|
1 todd
|
|
1 sm
|
|
4 yq
|
|
explain extended select * from t3 where a in (1,4);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t3 range idx idx 5 NULL 4 100.00 Using index condition
|
|
Warnings:
|
|
Note 1003 select `test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from `test`.`t3` where `test`.`t3`.`a` in (1,4)
|
|
set @@in_predicate_conversion_threshold= 2;
|
|
select * from t3 where a in (1,4);
|
|
a b
|
|
1 abc
|
|
1 todd
|
|
1 sm
|
|
4 yq
|
|
explain extended select * from t3 where a in (1,4);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t3 ALL idx NULL NULL NULL 28 100.00 Using where
|
|
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 4 test.t3.a 1 100.00
|
|
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b` from (values (1),(4)) `tvc_0` join `test`.`t3` where `tvc_0`.`_col_1` = `test`.`t3`.`a`
|
|
# use vectors in IN predeicate
|
|
set @@in_predicate_conversion_threshold= 4;
|
|
select * from t1 where (a,b) in ((1,2),(3,4));
|
|
a b
|
|
1 2
|
|
explain extended select * from t1 where (a,b) in ((1,2),(3,4));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
|
|
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 8 test.t1.a,test.t1.b 1 100.00
|
|
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from (values (1,2),(3,4)) `tvc_0` join `test`.`t1` where `tvc_0`.`_col_1` = `test`.`t1`.`a` and `tvc_0`.`_col_2` = `test`.`t1`.`b`
|
|
set @@in_predicate_conversion_threshold= 2;
|
|
# transformation works for the one IN predicate and doesn't work for the other
|
|
set @@in_predicate_conversion_threshold= 5;
|
|
select * from t2
|
|
where (a,b) in ((1,2),(8,9)) and
|
|
(a,c) in ((1,3),(8,0),(5,1));
|
|
a b c
|
|
1 2 3
|
|
8 9 0
|
|
explain extended select * from t2
|
|
where (a,b) in ((1,2),(8,9)) and
|
|
(a,c) in ((1,3),(8,0),(5,1));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 6 100.00 Using where
|
|
1 PRIMARY <derived3> eq_ref distinct_key distinct_key 8 test.t2.a,test.t2.c 1 100.00
|
|
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c` from (values (1,3),(8,0),(5,1)) `tvc_0` join `test`.`t2` where `tvc_0`.`_col_1` = `test`.`t2`.`a` and `tvc_0`.`_col_2` = `test`.`t2`.`c` and (`test`.`t2`.`a`,`test`.`t2`.`b`) in (<cache>((1,2)),<cache>((8,9)))
|
|
set @@in_predicate_conversion_threshold= 2;
|
|
#
|
|
# mdev-14281: conversion of NOT IN predicate into subquery predicate
|
|
#
|
|
select * from t1
|
|
where (a,b) not in ((1,2),(8,9), (5,1));
|
|
a b
|
|
4 6
|
|
9 7
|
|
1 1
|
|
2 5
|
|
7 8
|
|
select * from t1
|
|
where (a,b) not in (select * from (values (1,2),(8,9), (5,1)) as tvc_0);
|
|
a b
|
|
4 6
|
|
9 7
|
|
1 1
|
|
2 5
|
|
7 8
|
|
explain extended select * from t1
|
|
where (a,b) not in ((1,2),(8,9), (5,1));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
|
|
2 DEPENDENT SUBQUERY <derived3> unique_subquery distinct_key distinct_key 8 func,func 1 100.00 Using where; Full scan on NULL key
|
|
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where !<expr_cache><`test`.`t1`.`a`,`test`.`t1`.`b`>(<in_optimizer>((`test`.`t1`.`a`,`test`.`t1`.`b`),<exists>(<primary_index_lookup>(<cache>(`test`.`t1`.`a`) in <temporary table> on distinct_key where trigcond(<cache>(`test`.`t1`.`a`) = `tvc_0`.`_col_1`) and trigcond(<cache>(`test`.`t1`.`b`) = `tvc_0`.`_col_2`)))))
|
|
explain extended select * from t1
|
|
where (a,b) not in (select * from (values (1,2),(8,9), (5,1)) as tvc_0);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
|
|
2 DEPENDENT SUBQUERY <derived3> unique_subquery distinct_key distinct_key 8 func,func 1 100.00 Using where; Full scan on NULL key
|
|
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where !<expr_cache><`test`.`t1`.`a`,`test`.`t1`.`b`>(<in_optimizer>((`test`.`t1`.`a`,`test`.`t1`.`b`),<exists>(<primary_index_lookup>(<cache>(`test`.`t1`.`a`) in <temporary table> on distinct_key where trigcond(<cache>(`test`.`t1`.`a`) = `tvc_0`.`1`) and trigcond(<cache>(`test`.`t1`.`b`) = `tvc_0`.`2`)))))
|
|
select * from t1
|
|
where b < 7 and (a,b) not in ((1,2),(8,9), (5,1));
|
|
a b
|
|
4 6
|
|
1 1
|
|
2 5
|
|
explain extended select * from t1
|
|
where b < 7 and (a,b) not in ((1,2),(8,9), (5,1));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 6 100.00 Using where
|
|
2 DEPENDENT SUBQUERY <derived3> unique_subquery distinct_key distinct_key 8 func,func 1 100.00 Using where; Full scan on NULL key
|
|
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where `test`.`t1`.`b` < 7 and !<expr_cache><`test`.`t1`.`a`,`test`.`t1`.`b`>(<in_optimizer>((`test`.`t1`.`a`,`test`.`t1`.`b`),<exists>(<primary_index_lookup>(<cache>(`test`.`t1`.`a`) in <temporary table> on distinct_key where trigcond(<cache>(`test`.`t1`.`a`) = `tvc_0`.`_col_1`) and trigcond(<cache>(`test`.`t1`.`b`) = `tvc_0`.`_col_2`)))))
|
|
select * from t2
|
|
where (a,c) not in ((1,2),(8,9), (5,1));
|
|
a b c
|
|
1 2 3
|
|
5 1 2
|
|
4 3 7
|
|
8 9 0
|
|
10 7 1
|
|
explain extended select * from t2
|
|
where (a,c) not in ((1,2),(8,9), (5,1));
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 6 100.00 Using where
|
|
2 DEPENDENT SUBQUERY <derived3> unique_subquery distinct_key distinct_key 8 func,func 1 100.00 Using where; Full scan on NULL key
|
|
3 DERIVED NULL NULL NULL NULL NULL NULL NULL NULL No tables used
|
|
Warnings:
|
|
Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`c` AS `c` from `test`.`t2` where !<expr_cache><`test`.`t2`.`a`,`test`.`t2`.`c`>(<in_optimizer>((`test`.`t2`.`a`,`test`.`t2`.`c`),<exists>(<primary_index_lookup>(<cache>(`test`.`t2`.`a`) in <temporary table> on distinct_key where trigcond(<cache>(`test`.`t2`.`a`) = `tvc_0`.`_col_1`) and trigcond(<cache>(`test`.`t2`.`c`) = `tvc_0`.`_col_2`)))))
|
|
drop table t1, t2, t3;
|
|
set @@in_predicate_conversion_threshold= default;
|
|
#
|
|
# MDEV-14947: conversion to TVC with only NULL values
|
|
#
|
|
CREATE TABLE t1 (i INT);
|
|
INSERT INTO t1 VALUES (3), (2), (7);
|
|
SELECT * FROM t1 WHERE i IN (NULL, NULL, NULL, NULL, NULL);
|
|
i
|
|
EXPLAIN EXTENDED SELECT * FROM t1 WHERE i IN (NULL, NULL, NULL, NULL, NULL);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`i` AS `i` from `test`.`t1` where `test`.`t1`.`i` in (NULL,NULL,NULL,NULL,NULL)
|
|
SET in_predicate_conversion_threshold= 5;
|
|
SELECT * FROM t1 WHERE i IN (NULL, NULL, NULL, NULL, NULL);
|
|
i
|
|
EXPLAIN EXTENDED SELECT * FROM t1 WHERE i IN (NULL, NULL, NULL, NULL, NULL);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
|
Warnings:
|
|
Note 1003 select `test`.`t1`.`i` AS `i` from `test`.`t1` where `test`.`t1`.`i` in (NULL,NULL,NULL,NULL,NULL)
|
|
SET in_predicate_conversion_threshold= default;
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-14835: conversion to TVC with BIGINT or YEAR values
|
|
#
|
|
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');
|
|
a
|
|
1
|
|
3
|
|
SELECT * FROM t2 WHERE y IN ('2009','2011');
|
|
y
|
|
2009
|
|
2011
|
|
DROP TABLE t1,t2;
|
|
SET @@in_predicate_conversion_threshold= default;
|
|
#
|
|
# MDEV-17222: conversion to TVC with no names for constants
|
|
# conversion to TVC with the same constants in the first row
|
|
#
|
|
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');
|
|
COUNT(*)
|
|
2
|
|
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'));
|
|
COUNT(*)
|
|
1
|
|
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));
|
|
f1 f2
|
|
1 2
|
|
1 1
|
|
DROP TABLE t1,t2,t3;
|
|
SET @@in_predicate_conversion_threshold= default;
|
|
#
|
|
# MDEV-20900: IN predicate to IN subquery conversion causes performance regression
|
|
#
|
|
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;
|
|
explain select * from t1 where t1.a IN ("1","2","3","4");
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 Using where
|
|
select * from t1 where t1.a IN ("1","2","3","4");
|
|
a b
|
|
1 1
|
|
2 2
|
|
3 3
|
|
4 4
|
|
set in_predicate_conversion_threshold=0;
|
|
explain select * from t1 where t1.a IN ("1","2","3","4");
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 Using where
|
|
select * from t1 where t1.a IN ("1","2","3","4");
|
|
a b
|
|
1 1
|
|
2 2
|
|
3 3
|
|
4 4
|
|
set in_predicate_conversion_threshold=2;
|
|
explain select * from t1 where (t1.a,t1.b) in (("1","1"),(2,2),(3,3),(4,4));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 Using where
|
|
select * from t1 where (t1.a,t1.b) in (("1","1"),(2,2),(3,3),(4,4));
|
|
a b
|
|
1 1
|
|
2 2
|
|
3 3
|
|
4 4
|
|
set in_predicate_conversion_threshold=0;
|
|
explain select * from t1 where (t1.a,t1.b) in (("1","1"),(2,2),(3,3),(4,4));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 10 Using where
|
|
select * from t1 where (t1.a,t1.b) in (("1","1"),(2,2),(3,3),(4,4));
|
|
a b
|
|
1 1
|
|
2 2
|
|
3 3
|
|
4 4
|
|
drop table t1;
|
|
SET @@in_predicate_conversion_threshold= default;
|
|
#
|
|
# MDEV-27937: Prepared statement with ? in the list if IN predicate
|
|
#
|
|
set in_predicate_conversion_threshold=2;
|
|
create table t1 (id int, a int, b int);
|
|
insert into t1 values (1,3,30), (2,7,70), (3,1,10);
|
|
prepare stmt from "
|
|
select * from t1 where a in (7, ?, 5, 1);
|
|
";
|
|
execute stmt using 3;
|
|
id a b
|
|
1 3 30
|
|
2 7 70
|
|
3 1 10
|
|
deallocate prepare stmt;
|
|
prepare stmt from "
|
|
select * from t1 where (a,b) in ((7,70), (3,?), (5,50), (1,10));
|
|
";
|
|
execute stmt using 30;
|
|
id a b
|
|
1 3 30
|
|
2 7 70
|
|
3 1 10
|
|
deallocate prepare stmt;
|
|
drop table t1;
|
|
set in_predicate_conversion_threshold=default;
|
|
# End of 10.3 tests
|