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103b1df510
in Field_iterator_table::create_item When IN predicate is converted to IN subquery we have to ensure that any item from the select list of the subquery has some name and this name is unique across the select list. This was not guaranteed by the code before the patch for MDEV-17222. If the name of an item of the select list was not set, and this happened for binary constants, then the server crashed. If the first row in the IN list contained the same constant in two different positions then the server returned an error message. This was fixed by providing all constants in the first row of the IN list with generated names.
398 lines
7.8 KiB
Text
398 lines
7.8 KiB
Text
#
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# MDEV-12176 Transform [NOT] IN predicate with long list of values INTO [NOT] IN subquery
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#
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source include/have_debug.inc;
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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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--echo # optimization is not used
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let $query= select * from t1 where a in (1,2);
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eval $query;
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eval explain extended $query;
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--echo # 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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--echo # single IN-predicate in WHERE-part
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let $query= select * from t1 where a in (1,2);
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let $optimized_query=
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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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eval $query;
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eval $optimized_query;
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eval explain extended $query;
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eval explain extended $optimized_query;
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--echo # AND-condition with IN-predicates in WHERE-part
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let $query=
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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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let $optimized_query=
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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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eval $query;
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eval $optimized_query;
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eval explain extended $query;
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eval explain extended $optimized_query;
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--echo # subquery with IN-predicate
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let $query=
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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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let $optimized_query=
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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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eval $query;
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eval $optimized_query;
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eval explain extended $query;
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eval explain extended $optimized_query;
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--echo # derived table with IN-predicate
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let $query=
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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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let $optimized_query=
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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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eval $query;
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eval $optimized_query;
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eval explain extended $query;
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eval explain extended $optimized_query;
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--echo # non-recursive CTE with IN-predicate
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let $cte_query=
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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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eval $cte_query;
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eval $optimized_query;
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eval explain extended $cte_query;
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eval explain extended $optimized_query;
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--echo # 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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let $query= select * from v1;
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let $optimized_query= select * from v2;
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eval $query;
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eval $optimized_query;
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eval explain extended $query;
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eval explain extended $optimized_query;
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drop view v1,v2;
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--echo # subselect defined by derived table with IN-predicate
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let $query=
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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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let $optimized_query=
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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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eval $query;
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eval $optimized_query;
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eval explain extended $query;
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eval explain extended $optimized_query;
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--echo # derived table with IN-predicate and group by
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let $query=
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select * from
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(
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select max(a),b
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from t1
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where b in (3,5)
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group by b
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) as dr_table;
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let $optimized_query=
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select * from
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(
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select max(a),b
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from t1
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where b in
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(
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select *
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from (values (3),(5))
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as tvc_0
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)
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group by b
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) as dr_table;
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eval $query;
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eval $optimized_query;
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eval explain extended $query;
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eval explain extended $optimized_query;
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--echo # prepare statement
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prepare stmt from "select * from t1 where a in (1,2)";
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execute stmt;
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execute stmt;
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deallocate prepare stmt;
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--echo # use inside out access from tvc rows
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let $query= select * from t3 where a in (1,4);
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set @@in_predicate_conversion_threshold= default;
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eval $query;
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eval explain extended $query;
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set @@in_predicate_conversion_threshold= 2;
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eval $query;
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eval explain extended $query;
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--echo # use vectors in IN predeicate
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set @@in_predicate_conversion_threshold= 4;
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let $query=
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select * from t1 where (a,b) in ((1,2),(3,4));
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eval $query;
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eval explain extended $query;
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set @@in_predicate_conversion_threshold= 2;
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--echo # trasformation works for the one IN predicate and doesn't work for the other
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set @@in_predicate_conversion_threshold= 5;
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let $query=
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select * from t2
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where (a,b) in ((1,2),(8,9)) and
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(a,c) in ((1,3),(8,0),(5,1));
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eval $query;
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eval explain extended $query;
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set @@in_predicate_conversion_threshold= 2;
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--echo #
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--echo # mdev-14281: conversion of NOT IN predicate into subquery predicate
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--echo #
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let $query=
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select * from t1
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where (a,b) not in ((1,2),(8,9), (5,1));
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let $optimized_query=
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select * from t1
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where (a,b) not in (select * from (values (1,2),(8,9), (5,1)) as tvc_0);
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eval $query;
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eval $optimized_query;
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eval explain extended $query;
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eval explain extended $optimized_query;
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let $query=
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select * from t1
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where b < 7 and (a,b) not in ((1,2),(8,9), (5,1));
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eval $query;
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eval explain extended $query;
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let $query=
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select * from t2
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where (a,c) not in ((1,2),(8,9), (5,1));
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eval $query;
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eval explain extended $query;
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drop table t1, t2, t3;
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set @@in_predicate_conversion_threshold= default;
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--echo #
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--echo # MDEV-14947: conversion to TVC with only NULL values
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--echo #
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CREATE TABLE t1 (i INT);
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INSERT INTO t1 VALUES (3), (2), (7);
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let $q=
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SELECT * FROM t1 WHERE i IN (NULL, NULL, NULL, NULL, NULL);
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eval $q;
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eval EXPLAIN EXTENDED $q;
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SET in_predicate_conversion_threshold= 5;
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eval $q;
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eval EXPLAIN EXTENDED $q;
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SET in_predicate_conversion_threshold= default;
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DROP TABLE t1;
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--echo #
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--echo # MDEV-14835: conversion to TVC with BIGINT or YEAR values
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--echo #
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SET @@in_predicate_conversion_threshold= 2;
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CREATE TABLE t1 (a BIGINT);
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CREATE TABLE t2 (y YEAR);
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INSERT INTO t1 VALUES (1), (2), (3);
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INSERT INTO t2 VALUES (2009), (2010), (2011);
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SELECT * FROM t1 WHERE a IN ('1','5','3');
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SELECT * FROM t2 WHERE y IN ('2009','2011');
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DROP TABLE t1,t2;
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SET @@in_predicate_conversion_threshold= default;
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--echo #
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--echo # MDEV-17222: conversion to TVC with no names for constants
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--echo # conversion to TVC with the same constants in the first row
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--echo #
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SET @@in_predicate_conversion_threshold= 2;
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CREATE TABLE t1 (f BINARY(16)) ENGINE=MYISAM;
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INSERT INTO t1 VALUES
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(x'BAE56AF2B1C2397D99D58E2A06761DDB'), (x'9B9B698BCCB939EE8F1EA56C1A2E5DAA'),
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(x'A0A1C4FE39A239BABD3E0D8985E6BEA5');
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SELECT COUNT(*) FROM t1 WHERE f IN
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(x'9B9B698BCCB939EE8F1EA56C1A2E5DAA', x'E2362DBAB5EA30B5804917A0A7D881E2',
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x'B78B2EEAD13635088D93EA3309E24802', x'BAE56AF2B1C2397D99D58E2A06761DDB');
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CREATE TABLE t2 (f1 BINARY(16), f2 BINARY(16)) ENGINE=MYISAM;
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INSERT INTO t2 VALUES
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(x'55FB3B14D6B83D39859E42533906350D', x'00F3458C47FA39DDBEAD918A13F8342E'),
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(x'86052C062AAF368D84247ED0F6346A70', x'BF5C35045C6037C79E11026ABB9A3A4E');
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SELECT COUNT(*) FROM t2 WHERE (f1,f2) IN
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((x'9B9B698BCCB939EE8F1EA56C1A2E5DAA', x'E2362DBAB5EA30B5804917A0A7D881E2'),
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(x'B78B2EEAD13635088D93EA3309E24802', x'BAE56AF2B1C2397D99D58E2A06761DDB'),
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(x'55FB3B14D6B83D39859E42533906350D', x'00F3458C47FA39DDBEAD918A13F8342E'),
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(x'1606014E7C4A312F83EDC9D91BBFCACA', x'33F6068E56FD3A1D8326517F0D81CB5A'));
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CREATE TABLE t3 (f1 int, f2 int) ENGINE=MYISAM;
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INSERT INTO t3 VALUES (2,5), (2,3), (1,2), (7,8), (1,1);
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SELECT * FROM t3 WHERE (f1,f2) IN ((2, 2), (1, 2), (3, 5), (1, 1));
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DROP TABLE t1,t2,t3;
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SET @@in_predicate_conversion_threshold= default;
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