| Current Path : /home/usr.opt/mysql57/mysql-test/suite/opt_trace/r/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : /home/usr.opt/mysql57/mysql-test/suite/opt_trace/r/bugs_no_prot_none.result |
set optimizer_trace_max_mem_size=1048576;
SET end_markers_in_json=on;
SET optimizer_trace="enabled=on,one_line=off";
#
# BUG#12430646 - SEL_ARG::LEFT AND RIGHT POINTERS INCORRECTLY
# USED. CRASHES OPTIMIZER TRACING
#
CREATE TABLE t1 (
a INT,
b CHAR(2),
c INT,
d INT,
KEY (c),
KEY (d,a,b(2)),
KEY (b(1))
);
INSERT INTO t1 VALUES (NULL, 'a', 1, 2), (NULL, 'a', 1, 2),
(1, 'a', 1, 2), (1, 'a', 1, 2);
CREATE TABLE t2 (
a INT,
c INT,
e INT,
KEY (e)
);
INSERT INTO t2 VALUES (1, 1, NULL), (1, 1, NULL);
SELECT 1
FROM t1, t2
WHERE t1.d <> '1' AND t1.b > '1'
AND t1.a = t2.a AND t1.c = t2.c;
1
1
1
1
1
DROP TABLE t1, t2;
#
# BUG#12595210 - JSON SYNTAX ERROR ASSERT ON WHERE FIELD NOT IN SUBQUERY
#
CREATE TABLE t1 (
pk INT NOT NULL AUTO_INCREMENT,
col_int_key INT DEFAULT NULL,
col_varchar_key VARCHAR(1) DEFAULT NULL,
PRIMARY KEY (pk)
) ENGINE=InnoDB;
CREATE TABLE t2 (
pk INT NOT NULL AUTO_INCREMENT,
col_int_key INT DEFAULT NULL,
col_varchar_key VARCHAR(1) DEFAULT NULL,
col_varchar_nokey VARCHAR(1) DEFAULT NULL,
PRIMARY KEY (pk)
) ENGINE=InnoDB;
CREATE TABLE t3 (
pk INT NOT NULL AUTO_INCREMENT,
col_int_key INT DEFAULT NULL,
col_varchar_key VARCHAR(1) DEFAULT NULL,
col_varchar_nokey VARCHAR(1) DEFAULT NULL,
PRIMARY KEY (pk)
) ENGINE=InnoDB;
CREATE TABLE t4 (
pk INT NOT NULL AUTO_INCREMENT,
col_int_key INT DEFAULT NULL,
col_varchar_key VARCHAR(1) DEFAULT NULL,
PRIMARY KEY (pk)
) ENGINE=InnoDB;
CREATE VIEW view_t4 AS SELECT * FROM t4;
CREATE TABLE where_subselect_19379 SELECT
(
SELECT SUM(sq1_alias1.pk) AS sq1_field1
FROM view_t4 AS sq1_alias1
INNER JOIN t1 AS sq1_alias2 ON (sq1_alias2.col_varchar_key =
sq1_alias1.col_varchar_key )
) AS field1,
alias1.col_varchar_nokey AS field2
FROM (t2 AS alias1
LEFT JOIN ( t2 AS alias2
LEFT OUTER JOIN t2 AS alias3 ON (alias3.col_varchar_nokey =
alias2.col_varchar_key )
) ON (alias3.col_varchar_key = alias2.col_varchar_key)
)
WHERE ( alias2.col_varchar_key IN (
SELECT sq2_alias1.col_varchar_nokey AS sq2_field1
FROM t3 AS sq2_alias1
WHERE sq2_alias1.col_varchar_nokey <= alias1.col_varchar_key
)
);
SELECT * FROM where_subselect_19379 WHERE (field1, field2) NOT IN
(SELECT
(
SELECT SUM(sq1_alias1.pk) AS sq1_field1
FROM view_t4 AS sq1_alias1
INNER JOIN t1 AS sq1_alias2 ON (sq1_alias2.col_varchar_key =
sq1_alias1.col_varchar_key )
) AS field1,
alias1.col_varchar_nokey AS field2
FROM (t2 AS alias1
LEFT JOIN ( t2 AS alias2
LEFT OUTER JOIN t2 AS alias3 ON (alias3.col_varchar_nokey =
alias2.col_varchar_key )
) ON (alias3.col_varchar_key = alias2.col_varchar_key)
)
WHERE ( alias2.col_varchar_key IN (
SELECT sq2_alias1.col_varchar_nokey AS sq2_field1
FROM t3 AS sq2_alias1
WHERE sq2_alias1.col_varchar_nokey <= alias1.col_varchar_key
)
));
field1 field2
select * from information_schema.OPTIMIZER_TRACE;
QUERY TRACE MISSING_BYTES_BEYOND_MAX_MEM_SIZE INSUFFICIENT_PRIVILEGES
SELECT * FROM where_subselect_19379 WHERE (field1, field2) NOT IN
(SELECT
(
SELECT SUM(sq1_alias1.pk) AS sq1_field1
FROM view_t4 AS sq1_alias1
INNER JOIN t1 AS sq1_alias2 ON (sq1_alias2.col_varchar_key =
sq1_alias1.col_varchar_key )
) AS field1,
alias1.col_varchar_nokey AS field2
FROM (t2 AS alias1
LEFT JOIN ( t2 AS alias2
LEFT OUTER JOIN t2 AS alias3 ON (alias3.col_varchar_nokey =
alias2.col_varchar_key )
) ON (alias3.col_varchar_key = alias2.col_varchar_key)
)
WHERE ( alias2.col_varchar_key IN (
SELECT sq2_alias1.col_varchar_nokey AS sq2_field1
FROM t3 AS sq2_alias1
WHERE sq2_alias1.col_varchar_nokey <= alias1.col_varchar_key
)
)) {
"steps": [
{
"join_preparation": {
"select#": 1,
"steps": [
{
"join_preparation": {
"select#": 2,
"steps": [
{
"join_preparation": {
"select#": 3,
"steps": [
{
"join_preparation": {
"select#": 5,
"steps": [
{
"expanded_query": "/* select#5 */ select `t4`.`pk` AS `pk`,`t4`.`col_int_key` AS `col_int_key`,`t4`.`col_varchar_key` AS `col_varchar_key` from `t4`"
}
] /* steps */
} /* join_preparation */
},
{
"view": {
"table": "`view_t4` `sq1_alias1`",
"select#": 5,
"merged": true
} /* view */
},
{
"expanded_query": "/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from ((`t4`) join `t1` `sq1_alias2` on((`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)))"
}
] /* steps */
} /* join_preparation */
},
{
"join_preparation": {
"select#": 4,
"steps": [
{
"expanded_query": "/* select#4 */ select `sq2_alias1`.`col_varchar_nokey` AS `sq2_field1` from `t3` `sq2_alias1` where (`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`)"
},
{
"transformation": {
"select#": 4,
"from": "IN (SELECT)",
"to": "semijoin",
"chosen": false
} /* transformation */
},
{
"transformation": {
"select#": 4,
"from": "IN (SELECT)",
"to": "EXISTS (CORRELATED SELECT)",
"chosen": true,
"evaluating_constant_where_conditions": [
] /* evaluating_constant_where_conditions */
} /* transformation */
}
] /* steps */
} /* join_preparation */
},
{
"expanded_query": "/* select#2 */ select (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from ((`t4`) join `t1` `sq1_alias2` on((`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)))) AS `field1`,`alias1`.`col_varchar_nokey` AS `field2` from (`t2` `alias1` left join (`t2` `alias2` left join `t2` `alias3` on((`alias3`.`col_varchar_nokey` = `alias2`.`col_varchar_key`))) on((`alias3`.`col_varchar_key` = `alias2`.`col_varchar_key`))) where <in_optimizer>(`alias2`.`col_varchar_key`,<exists>(/* select#4 */ select `sq2_alias1`.`col_varchar_nokey` AS `sq2_field1` from `t3` `sq2_alias1` where ((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`))))"
},
{
"transformation": {
"select#": 2,
"from": "IN (SELECT)",
"to": "semijoin",
"chosen": false
} /* transformation */
},
{
"transformation": {
"select#": 2,
"from": "IN (SELECT)",
"to": "EXISTS (CORRELATED SELECT)",
"chosen": true,
"evaluating_constant_where_conditions": [
] /* evaluating_constant_where_conditions */,
"evaluating_constant_having_conditions": [
] /* evaluating_constant_having_conditions */
} /* transformation */
}
] /* steps */
} /* join_preparation */
},
{
"expanded_query": "/* select#1 */ select `where_subselect_19379`.`field1` AS `field1`,`where_subselect_19379`.`field2` AS `field2` from `where_subselect_19379` where (not(<in_optimizer>((`where_subselect_19379`.`field1`,`where_subselect_19379`.`field2`),<exists>(/* select#2 */ select (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from ((`t4`) join `t1` `sq1_alias2` on((`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)))) AS `field1`,`alias1`.`col_varchar_nokey` AS `field2` from (`t2` `alias1` left join (`t2` `alias2` left join `t2` `alias3` on((`alias3`.`col_varchar_nokey` = `alias2`.`col_varchar_key`))) on((`alias3`.`col_varchar_key` = `alias2`.`col_varchar_key`))) where (<in_optimizer>(`alias2`.`col_varchar_key`,<exists>(/* select#4 */ select `sq2_alias1`.`col_varchar_nokey` AS `sq2_field1` from `t3` `sq2_alias1` where ((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`)))) and <if>(outer_field_is_not_null, ((<cache>(`where_subselect_19379`.`field1`) = (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from ((`t4`) join `t1` `sq1_alias2` on((`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))))) or isnull((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from ((`t4`) join `t1` `sq1_alias2` on((`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)))))), true) and <if>(outer_field_is_not_null, ((<cache>(`where_subselect_19379`.`field2`) = `alias1`.`col_varchar_nokey`) or isnull(`alias1`.`col_varchar_nokey`)), true)) having (<if>(outer_field_is_not_null, <is_not_null_test>((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from ((`t4`) join `t1` `sq1_alias2` on((`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))))), true) and <if>(outer_field_is_not_null, <is_not_null_test>(`alias1`.`col_varchar_nokey`), true))))))"
},
{
"transformations_to_nested_joins": {
"transformations": [
"JOIN_condition_to_WHERE",
"parenthesis_removal"
] /* transformations */,
"expanded_query": "/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)"
} /* transformations_to_nested_joins */
},
{
"transformations_to_nested_joins": {
"transformations": [
"outer_join_to_inner_join",
"JOIN_condition_to_WHERE",
"parenthesis_removal"
] /* transformations */,
"expanded_query": "/* select#2 */ select (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)) AS `field1`,`alias1`.`col_varchar_nokey` AS `field2` from `t2` `alias1` join `t2` `alias2` join `t2` `alias3` where (<in_optimizer>(`alias2`.`col_varchar_key`,<exists>(/* select#4 */ select `sq2_alias1`.`col_varchar_nokey` AS `sq2_field1` from `t3` `sq2_alias1` where ((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`)))) and <if>(outer_field_is_not_null, ((<cache>(`where_subselect_19379`.`field1`) = (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))) or isnull((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)))), true) and <if>(outer_field_is_not_null, ((<cache>(`where_subselect_19379`.`field2`) = `alias1`.`col_varchar_nokey`) or isnull(`alias1`.`col_varchar_nokey`)), true) and (`alias3`.`col_varchar_key` = `alias2`.`col_varchar_key`) and (`alias3`.`col_varchar_nokey` = `alias2`.`col_varchar_key`)) having (<if>(outer_field_is_not_null, <is_not_null_test>((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))), true) and <if>(outer_field_is_not_null, <is_not_null_test>(`alias1`.`col_varchar_nokey`), true))"
} /* transformations_to_nested_joins */
}
] /* steps */
} /* join_preparation */
},
{
"join_optimization": {
"select#": 1,
"steps": [
{
"condition_processing": {
"condition": "WHERE",
"original_condition": "(not(<in_optimizer>((`where_subselect_19379`.`field1`,`where_subselect_19379`.`field2`),<exists>(/* select#2 */ select (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)) AS `field1`,`alias1`.`col_varchar_nokey` AS `field2` from `t2` `alias1` join `t2` `alias2` join `t2` `alias3` where (<in_optimizer>(`alias2`.`col_varchar_key`,<exists>(/* select#4 */ select `sq2_alias1`.`col_varchar_nokey` AS `sq2_field1` from `t3` `sq2_alias1` where ((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`)))) and <if>(outer_field_is_not_null, ((<cache>(`where_subselect_19379`.`field1`) = (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))) or isnull((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)))), true) and <if>(outer_field_is_not_null, ((<cache>(`where_subselect_19379`.`field2`) = `alias1`.`col_varchar_nokey`) or isnull(`alias1`.`col_varchar_nokey`)), true) and (`alias3`.`col_varchar_key` = `alias2`.`col_varchar_key`) and (`alias3`.`col_varchar_nokey` = `alias2`.`col_varchar_key`)) having (<if>(outer_field_is_not_null, <is_not_null_test>((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))), true) and <if>(outer_field_is_not_null, <is_not_null_test>(`alias1`.`col_varchar_nokey`), true))))))",
"steps": [
{
"transformation": "equality_propagation",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "(not(<in_optimizer>((`where_subselect_19379`.`field1`,`where_subselect_19379`.`field2`),<exists>(/* select#2 */ select (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)) AS `field1`,`alias1`.`col_varchar_nokey` AS `field2` from `t2` `alias1` join `t2` `alias2` join `t2` `alias3` where (<in_optimizer>(`alias2`.`col_varchar_key`,<exists>(/* select#4 */ select `sq2_alias1`.`col_varchar_nokey` AS `sq2_field1` from `t3` `sq2_alias1` where ((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`)))) and <if>(outer_field_is_not_null, ((<cache>(`where_subselect_19379`.`field1`) = (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))) or isnull((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)))), true) and <if>(outer_field_is_not_null, ((<cache>(`where_subselect_19379`.`field2`) = `alias1`.`col_varchar_nokey`) or isnull(`alias1`.`col_varchar_nokey`)), true) and (`alias3`.`col_varchar_key` = `alias2`.`col_varchar_key`) and (`alias3`.`col_varchar_nokey` = `alias2`.`col_varchar_key`)) having (<if>(outer_field_is_not_null, <is_not_null_test>((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))), true) and <if>(outer_field_is_not_null, <is_not_null_test>(`alias1`.`col_varchar_nokey`), true))))))"
},
{
"transformation": "constant_propagation",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "(not(<in_optimizer>((`where_subselect_19379`.`field1`,`where_subselect_19379`.`field2`),<exists>(/* select#2 */ select (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)) AS `field1`,`alias1`.`col_varchar_nokey` AS `field2` from `t2` `alias1` join `t2` `alias2` join `t2` `alias3` where (<in_optimizer>(`alias2`.`col_varchar_key`,<exists>(/* select#4 */ select `sq2_alias1`.`col_varchar_nokey` AS `sq2_field1` from `t3` `sq2_alias1` where ((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`)))) and <if>(outer_field_is_not_null, ((<cache>(`where_subselect_19379`.`field1`) = (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))) or isnull((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)))), true) and <if>(outer_field_is_not_null, ((<cache>(`where_subselect_19379`.`field2`) = `alias1`.`col_varchar_nokey`) or isnull(`alias1`.`col_varchar_nokey`)), true) and (`alias3`.`col_varchar_key` = `alias2`.`col_varchar_key`) and (`alias3`.`col_varchar_nokey` = `alias2`.`col_varchar_key`)) having (<if>(outer_field_is_not_null, <is_not_null_test>((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))), true) and <if>(outer_field_is_not_null, <is_not_null_test>(`alias1`.`col_varchar_nokey`), true))))))"
},
{
"transformation": "trivial_condition_removal",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "(not(<in_optimizer>((`where_subselect_19379`.`field1`,`where_subselect_19379`.`field2`),<exists>(/* select#2 */ select (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)) AS `field1`,`alias1`.`col_varchar_nokey` AS `field2` from `t2` `alias1` join `t2` `alias2` join `t2` `alias3` where (<in_optimizer>(`alias2`.`col_varchar_key`,<exists>(/* select#4 */ select `sq2_alias1`.`col_varchar_nokey` AS `sq2_field1` from `t3` `sq2_alias1` where ((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`)))) and <if>(outer_field_is_not_null, ((<cache>(`where_subselect_19379`.`field1`) = (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))) or isnull((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)))), true) and <if>(outer_field_is_not_null, ((<cache>(`where_subselect_19379`.`field2`) = `alias1`.`col_varchar_nokey`) or isnull(`alias1`.`col_varchar_nokey`)), true) and (`alias3`.`col_varchar_key` = `alias2`.`col_varchar_key`) and (`alias3`.`col_varchar_nokey` = `alias2`.`col_varchar_key`)) having (<if>(outer_field_is_not_null, <is_not_null_test>((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))), true) and <if>(outer_field_is_not_null, <is_not_null_test>(`alias1`.`col_varchar_nokey`), true))))))"
}
] /* steps */
} /* condition_processing */
},
{
"substitute_generated_columns": {
} /* substitute_generated_columns */
},
{
"table_dependencies": [
{
"table": "`where_subselect_19379`",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits": [
] /* depends_on_map_bits */
}
] /* table_dependencies */
},
{
"ref_optimizer_key_uses": [
] /* ref_optimizer_key_uses */
},
{
"rows_estimation": [
{
"table": "`where_subselect_19379`",
"rows": 1,
"cost": 1,
"table_type": "system",
"empty": true
}
] /* rows_estimation */
}
] /* steps */,
"empty_result": {
"cause": "no matching row in const table"
} /* empty_result */
} /* join_optimization */
},
{
"join_optimization": {
"select#": 2,
"steps": [
{
"condition_processing": {
"condition": "WHERE",
"original_condition": "(<in_optimizer>(`alias2`.`col_varchar_key`,<exists>(/* select#4 */ select `sq2_alias1`.`col_varchar_nokey` AS `sq2_field1` from `t3` `sq2_alias1` where ((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`)))) and <if>(outer_field_is_not_null, ((<cache>(NULL) = (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))) or isnull((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)))), true) and <if>(outer_field_is_not_null, ((<cache>(NULL) = `alias1`.`col_varchar_nokey`) or isnull(`alias1`.`col_varchar_nokey`)), true) and (`alias3`.`col_varchar_key` = `alias2`.`col_varchar_key`) and (`alias3`.`col_varchar_nokey` = `alias2`.`col_varchar_key`))",
"steps": [
{
"transformation": "equality_propagation",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "(<in_optimizer>(`alias2`.`col_varchar_key`,<exists>(/* select#4 */ select `sq2_alias1`.`col_varchar_nokey` AS `sq2_field1` from `t3` `sq2_alias1` where ((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`)))) and <if>(outer_field_is_not_null, ((<cache>(NULL) = (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))) or isnull((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)))), true) and <if>(outer_field_is_not_null, ((<cache>(NULL) = `alias1`.`col_varchar_nokey`) or isnull(`alias1`.`col_varchar_nokey`)), true) and multiple equal(`alias3`.`col_varchar_key`, `alias2`.`col_varchar_key`, `alias3`.`col_varchar_nokey`))"
},
{
"transformation": "constant_propagation",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "(<in_optimizer>(`alias2`.`col_varchar_key`,<exists>(/* select#4 */ select `sq2_alias1`.`col_varchar_nokey` AS `sq2_field1` from `t3` `sq2_alias1` where ((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`)))) and <if>(outer_field_is_not_null, ((<cache>(NULL) = (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))) or isnull((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)))), true) and <if>(outer_field_is_not_null, ((<cache>(NULL) = `alias1`.`col_varchar_nokey`) or isnull(`alias1`.`col_varchar_nokey`)), true) and multiple equal(`alias3`.`col_varchar_key`, `alias2`.`col_varchar_key`, `alias3`.`col_varchar_nokey`))"
},
{
"transformation": "trivial_condition_removal",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "(<in_optimizer>(`alias2`.`col_varchar_key`,<exists>(/* select#4 */ select `sq2_alias1`.`col_varchar_nokey` AS `sq2_field1` from `t3` `sq2_alias1` where ((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`)))) and <if>(outer_field_is_not_null, ((<cache>(NULL) = (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))) or isnull((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)))), true) and <if>(outer_field_is_not_null, ((<cache>(NULL) = `alias1`.`col_varchar_nokey`) or isnull(`alias1`.`col_varchar_nokey`)), true) and multiple equal(`alias3`.`col_varchar_key`, `alias2`.`col_varchar_key`, `alias3`.`col_varchar_nokey`))"
}
] /* steps */
} /* condition_processing */
},
{
"condition_processing": {
"condition": "HAVING",
"original_condition": "(<if>(outer_field_is_not_null, <is_not_null_test>((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))), true) and <if>(outer_field_is_not_null, <is_not_null_test>(`alias1`.`col_varchar_nokey`), true))",
"steps": [
{
"transformation": "constant_propagation",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "(<if>(outer_field_is_not_null, <is_not_null_test>((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))), true) and <if>(outer_field_is_not_null, <is_not_null_test>(`alias1`.`col_varchar_nokey`), true))"
},
{
"transformation": "trivial_condition_removal",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "(<if>(outer_field_is_not_null, <is_not_null_test>((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))), true) and <if>(outer_field_is_not_null, <is_not_null_test>(`alias1`.`col_varchar_nokey`), true))"
}
] /* steps */
} /* condition_processing */
},
{
"substitute_generated_columns": {
} /* substitute_generated_columns */
},
{
"table_dependencies": [
{
"table": "`t2` `alias1`",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits": [
] /* depends_on_map_bits */
},
{
"table": "`t2` `alias2`",
"row_may_be_null": true,
"map_bit": 1,
"depends_on_map_bits": [
] /* depends_on_map_bits */
},
{
"table": "`t2` `alias3`",
"row_may_be_null": true,
"map_bit": 2,
"depends_on_map_bits": [
] /* depends_on_map_bits */
}
] /* table_dependencies */
},
{
"ref_optimizer_key_uses": [
] /* ref_optimizer_key_uses */
},
{
"rows_estimation": [
{
"table": "`t2` `alias1`",
"table_scan": {
"rows": 1,
"cost": 1
} /* table_scan */
},
{
"table": "`t2` `alias2`",
"table_scan": {
"rows": 1,
"cost": 1
} /* table_scan */
},
{
"table": "`t2` `alias3`",
"table_scan": {
"rows": 1,
"cost": 1
} /* table_scan */
}
] /* rows_estimation */
},
{
"considered_execution_plans": [
{
"plan_prefix": [
] /* plan_prefix */,
"table": "`t2` `alias1`",
"best_access_path": {
"considered_access_paths": [
{
"rows_to_scan": 1,
"access_type": "scan",
"resulting_rows": 1,
"cost": 1.2,
"chosen": true
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 1,
"cost_for_plan": 1.2,
"rest_of_plan": [
{
"plan_prefix": [
"`t2` `alias1`"
] /* plan_prefix */,
"table": "`t2` `alias2`",
"best_access_path": {
"considered_access_paths": [
{
"rows_to_scan": 1,
"access_type": "scan",
"using_join_cache": true,
"buffers_needed": 1,
"resulting_rows": 1,
"cost": 1.2,
"chosen": true
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 1,
"cost_for_plan": 2.4,
"rest_of_plan": [
{
"plan_prefix": [
"`t2` `alias1`",
"`t2` `alias2`"
] /* plan_prefix */,
"table": "`t2` `alias3`",
"best_access_path": {
"considered_access_paths": [
{
"rows_to_scan": 1,
"access_type": "scan",
"using_join_cache": true,
"buffers_needed": 1,
"resulting_rows": 1,
"cost": 1.2,
"chosen": true
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 1,
"cost_for_plan": 3.6001,
"chosen": true
}
] /* rest_of_plan */
},
{
"plan_prefix": [
"`t2` `alias1`"
] /* plan_prefix */,
"table": "`t2` `alias3`",
"best_access_path": {
"considered_access_paths": [
{
"rows_to_scan": 1,
"access_type": "scan",
"using_join_cache": true,
"buffers_needed": 1,
"resulting_rows": 1,
"cost": 1.2,
"chosen": true
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 1,
"cost_for_plan": 2.4,
"pruned_by_heuristic": true
}
] /* rest_of_plan */
},
{
"plan_prefix": [
] /* plan_prefix */,
"table": "`t2` `alias2`",
"best_access_path": {
"considered_access_paths": [
{
"rows_to_scan": 1,
"access_type": "scan",
"resulting_rows": 1,
"cost": 1.2,
"chosen": true
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 1,
"cost_for_plan": 1.2,
"pruned_by_heuristic": true
},
{
"plan_prefix": [
] /* plan_prefix */,
"table": "`t2` `alias3`",
"best_access_path": {
"considered_access_paths": [
{
"rows_to_scan": 1,
"access_type": "scan",
"resulting_rows": 1,
"cost": 1.2,
"chosen": true
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 1,
"cost_for_plan": 1.2,
"pruned_by_heuristic": true
}
] /* considered_execution_plans */
},
{
"transformation": {
"select#": 2,
"from": "IN (SELECT)",
"to": "EXISTS (CORRELATED SELECT)",
"put_1_in_SELECT_list": true
} /* transformation */
},
{
"attaching_conditions_to_tables": {
"original_condition": "((`alias3`.`col_varchar_key` = `alias2`.`col_varchar_key`) and (`alias3`.`col_varchar_nokey` = `alias2`.`col_varchar_key`) and <in_optimizer>(`alias2`.`col_varchar_key`,<exists>(/* select#4 */ select `sq2_alias1`.`col_varchar_nokey` AS `sq2_field1` from `t3` `sq2_alias1` where ((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`)))) and <if>(outer_field_is_not_null, ((<cache>(NULL) = (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))) or isnull((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)))), true) and <if>(outer_field_is_not_null, ((<cache>(NULL) = `alias1`.`col_varchar_nokey`) or isnull(`alias1`.`col_varchar_nokey`)), true))",
"attached_conditions_computation": [
] /* attached_conditions_computation */,
"attached_conditions_summary": [
{
"table": "`t2` `alias1`",
"attached": "(<if>(outer_field_is_not_null, ((<cache>(NULL) = (/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`))) or isnull((/* select#3 */ select sum(`t4`.`pk`) AS `sq1_field1` from `t4` join `t1` `sq1_alias2` where (`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)))), true) and <if>(outer_field_is_not_null, ((<cache>(NULL) = `alias1`.`col_varchar_nokey`) or isnull(`alias1`.`col_varchar_nokey`)), true))"
},
{
"table": "`t2` `alias2`",
"attached": "<in_optimizer>(`alias2`.`col_varchar_key`,<exists>(/* select#4 */ select `sq2_alias1`.`col_varchar_nokey` AS `sq2_field1` from `t3` `sq2_alias1` where ((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`))))"
},
{
"table": "`t2` `alias3`",
"attached": "((`alias3`.`col_varchar_key` = `alias2`.`col_varchar_key`) and (`alias3`.`col_varchar_nokey` = `alias2`.`col_varchar_key`))"
}
] /* attached_conditions_summary */
} /* attaching_conditions_to_tables */
},
{
"refine_plan": [
{
"table": "`t2` `alias1`"
},
{
"table": "`t2` `alias2`"
},
{
"table": "`t2` `alias3`"
}
] /* refine_plan */
}
] /* steps */
} /* join_optimization */
},
{
"join_optimization": {
"select#": 4,
"steps": [
{
"condition_processing": {
"condition": "WHERE",
"original_condition": "((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`))",
"steps": [
{
"transformation": "equality_propagation",
"resulting_condition": "((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`))"
},
{
"transformation": "constant_propagation",
"resulting_condition": "((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`))"
},
{
"transformation": "trivial_condition_removal",
"resulting_condition": "((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`))"
}
] /* steps */
} /* condition_processing */
},
{
"substitute_generated_columns": {
} /* substitute_generated_columns */
},
{
"table_dependencies": [
{
"table": "`t3` `sq2_alias1`",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits": [
] /* depends_on_map_bits */
}
] /* table_dependencies */
},
{
"ref_optimizer_key_uses": [
] /* ref_optimizer_key_uses */
},
{
"rows_estimation": [
{
"table": "`t3` `sq2_alias1`",
"table_scan": {
"rows": 1,
"cost": 1
} /* table_scan */
}
] /* rows_estimation */
},
{
"considered_execution_plans": [
{
"plan_prefix": [
] /* plan_prefix */,
"table": "`t3` `sq2_alias1`",
"best_access_path": {
"considered_access_paths": [
{
"rows_to_scan": 1,
"access_type": "scan",
"resulting_rows": 1,
"cost": 1.2,
"chosen": true
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 1,
"cost_for_plan": 1.2,
"chosen": true
}
] /* considered_execution_plans */
},
{
"transformation": {
"select#": 4,
"from": "IN (SELECT)",
"to": "EXISTS (CORRELATED SELECT)",
"put_1_in_SELECT_list": true
} /* transformation */
},
{
"attaching_conditions_to_tables": {
"original_condition": "((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`))",
"attached_conditions_computation": [
] /* attached_conditions_computation */,
"attached_conditions_summary": [
{
"table": "`t3` `sq2_alias1`",
"attached": "((`sq2_alias1`.`col_varchar_nokey` <= `alias1`.`col_varchar_key`) and (<cache>(`alias2`.`col_varchar_key`) = `sq2_alias1`.`col_varchar_nokey`))"
}
] /* attached_conditions_summary */
} /* attaching_conditions_to_tables */
},
{
"refine_plan": [
{
"table": "`t3` `sq2_alias1`"
}
] /* refine_plan */
}
] /* steps */
} /* join_optimization */
},
{
"join_optimization": {
"select#": 3,
"steps": [
{
"condition_processing": {
"condition": "WHERE",
"original_condition": "(`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)",
"steps": [
{
"transformation": "equality_propagation",
"resulting_condition": "multiple equal(`sq1_alias2`.`col_varchar_key`, `t4`.`col_varchar_key`)"
},
{
"transformation": "constant_propagation",
"resulting_condition": "multiple equal(`sq1_alias2`.`col_varchar_key`, `t4`.`col_varchar_key`)"
},
{
"transformation": "trivial_condition_removal",
"resulting_condition": "multiple equal(`sq1_alias2`.`col_varchar_key`, `t4`.`col_varchar_key`)"
}
] /* steps */
} /* condition_processing */
},
{
"substitute_generated_columns": {
} /* substitute_generated_columns */
},
{
"table_dependencies": [
{
"table": "`t4`",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits": [
] /* depends_on_map_bits */
},
{
"table": "`t1` `sq1_alias2`",
"row_may_be_null": false,
"map_bit": 1,
"depends_on_map_bits": [
] /* depends_on_map_bits */
}
] /* table_dependencies */
},
{
"ref_optimizer_key_uses": [
] /* ref_optimizer_key_uses */
},
{
"rows_estimation": [
{
"table": "`t4`",
"table_scan": {
"rows": 1,
"cost": 1
} /* table_scan */
},
{
"table": "`t1` `sq1_alias2`",
"table_scan": {
"rows": 1,
"cost": 1
} /* table_scan */
}
] /* rows_estimation */
},
{
"considered_execution_plans": [
{
"plan_prefix": [
] /* plan_prefix */,
"table": "`t4`",
"best_access_path": {
"considered_access_paths": [
{
"rows_to_scan": 1,
"access_type": "scan",
"resulting_rows": 1,
"cost": 1.2,
"chosen": true
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 1,
"cost_for_plan": 1.2,
"rest_of_plan": [
{
"plan_prefix": [
"`t4`"
] /* plan_prefix */,
"table": "`t1` `sq1_alias2`",
"best_access_path": {
"considered_access_paths": [
{
"rows_to_scan": 1,
"access_type": "scan",
"using_join_cache": true,
"buffers_needed": 1,
"resulting_rows": 1,
"cost": 1.2,
"chosen": true
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 1,
"cost_for_plan": 2.4,
"chosen": true
}
] /* rest_of_plan */
},
{
"plan_prefix": [
] /* plan_prefix */,
"table": "`t1` `sq1_alias2`",
"best_access_path": {
"considered_access_paths": [
{
"rows_to_scan": 1,
"access_type": "scan",
"resulting_rows": 1,
"cost": 1.2,
"chosen": true
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 1,
"cost_for_plan": 1.2,
"pruned_by_heuristic": true
}
] /* considered_execution_plans */
},
{
"attaching_conditions_to_tables": {
"original_condition": "(`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)",
"attached_conditions_computation": [
] /* attached_conditions_computation */,
"attached_conditions_summary": [
{
"table": "`t4`",
"attached": null
},
{
"table": "`t1` `sq1_alias2`",
"attached": "(`sq1_alias2`.`col_varchar_key` = `t4`.`col_varchar_key`)"
}
] /* attached_conditions_summary */
} /* attaching_conditions_to_tables */
},
{
"refine_plan": [
{
"table": "`t4`"
},
{
"table": "`t1` `sq1_alias2`"
}
] /* refine_plan */
}
] /* steps */
} /* join_optimization */
},
{
"join_execution": {
"select#": 1,
"steps": [
] /* steps */
} /* join_execution */
}
] /* steps */
} 0 0
drop table t1,t2,t3,t4,where_subselect_19379;
drop view view_t4;
#
# BUG#12607524 JSON PARSE ERROR ON SELECT ... FROM ... WHERE .. IN (SUBQUERY)
#
CREATE TABLE t1 (
col_int_key int(11) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
KEY col_int_key (col_int_key),
KEY col_varchar_key (col_varchar_key,col_int_key)
) ENGINE=MyISAM;
INSERT INTO t1 VALUES (8,'g');
CREATE TABLE t2 (
col_int_key int(11) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
KEY col_int_key (col_int_key),
KEY col_varchar_key (col_varchar_key,col_int_key)
) ENGINE=MyISAM;
INSERT INTO t2 VALUES (7,'x');
CREATE TABLE where_subselect_19033
SELECT
( SELECT col_int_key FROM t2 ) as field1
FROM t1
;
SELECT * FROM where_subselect_19033;
field1
7
SELECT field1
FROM where_subselect_19033
WHERE field1 IN
( SELECT
( SELECT col_int_key FROM t2 )
FROM t1
)
;
field1
7
SELECT * FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
QUERY TRACE MISSING_BYTES_BEYOND_MAX_MEM_SIZE INSUFFICIENT_PRIVILEGES
SELECT field1
FROM where_subselect_19033
WHERE field1 IN
( SELECT
( SELECT col_int_key FROM t2 )
FROM t1
) {
"steps": [
{
"join_preparation": {
"select#": 1,
"steps": [
{
"join_preparation": {
"select#": 2,
"steps": [
{
"join_preparation": {
"select#": 3,
"steps": [
{
"expanded_query": "/* select#3 */ select `t2`.`col_int_key` from `t2`"
}
] /* steps */
} /* join_preparation */
},
{
"expanded_query": "/* select#2 */ select (/* select#3 */ select `t2`.`col_int_key` from `t2`) from `t1`"
},
{
"transformation": {
"select#": 2,
"from": "IN (SELECT)",
"to": "semijoin",
"chosen": false
} /* transformation */
},
{
"transformation": {
"select#": 2,
"from": "IN (SELECT)",
"to": "EXISTS (CORRELATED SELECT)",
"chosen": true,
"evaluating_constant_where_conditions": [
] /* evaluating_constant_where_conditions */
} /* transformation */
}
] /* steps */
} /* join_preparation */
},
{
"expanded_query": "/* select#1 */ select `where_subselect_19033`.`field1` AS `field1` from `where_subselect_19033` where <in_optimizer>(`where_subselect_19033`.`field1`,<exists>(/* select#2 */ select (/* select#3 */ select `t2`.`col_int_key` from `t2`) from `t1` where (<cache>(`where_subselect_19033`.`field1`) = (/* select#3 */ select `t2`.`col_int_key` from `t2`))))"
}
] /* steps */
} /* join_preparation */
},
{
"join_optimization": {
"select#": 1,
"steps": [
{
"condition_processing": {
"condition": "WHERE",
"original_condition": "<in_optimizer>(`where_subselect_19033`.`field1`,<exists>(/* select#2 */ select (/* select#3 */ select `t2`.`col_int_key` from `t2`) from `t1` where (<cache>(`where_subselect_19033`.`field1`) = (/* select#3 */ select `t2`.`col_int_key` from `t2`))))",
"steps": [
{
"transformation": "equality_propagation",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "<in_optimizer>(`where_subselect_19033`.`field1`,<exists>(/* select#2 */ select (/* select#3 */ select `t2`.`col_int_key` from `t2`) from `t1` where (<cache>(`where_subselect_19033`.`field1`) = (/* select#3 */ select `t2`.`col_int_key` from `t2`))))"
},
{
"transformation": "constant_propagation",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "<in_optimizer>(`where_subselect_19033`.`field1`,<exists>(/* select#2 */ select (/* select#3 */ select `t2`.`col_int_key` from `t2`) from `t1` where (<cache>(`where_subselect_19033`.`field1`) = (/* select#3 */ select `t2`.`col_int_key` from `t2`))))"
},
{
"transformation": "trivial_condition_removal",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "<in_optimizer>(`where_subselect_19033`.`field1`,<exists>(/* select#2 */ select (/* select#3 */ select `t2`.`col_int_key` from `t2`) from `t1` where (<cache>(`where_subselect_19033`.`field1`) = (/* select#3 */ select `t2`.`col_int_key` from `t2`))))"
}
] /* steps */
} /* condition_processing */
},
{
"substitute_generated_columns": {
} /* substitute_generated_columns */
},
{
"table_dependencies": [
{
"table": "`where_subselect_19033`",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits": [
] /* depends_on_map_bits */
}
] /* table_dependencies */
},
{
"ref_optimizer_key_uses": [
] /* ref_optimizer_key_uses */
},
{
"rows_estimation": [
{
"table": "`where_subselect_19033`",
"rows": 1,
"cost": 1,
"table_type": "system",
"empty": false
}
] /* rows_estimation */
},
{
"subselect_execution": {
"select#": 2,
"steps": [
{
"join_optimization": {
"select#": 2,
"steps": [
{
"condition_processing": {
"condition": "WHERE",
"original_condition": "(<cache>('7') = (/* select#3 */ select `t2`.`col_int_key` from `t2`))",
"steps": [
{
"transformation": "equality_propagation",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "(<cache>('7') = (/* select#3 */ select `t2`.`col_int_key` from `t2`))"
},
{
"transformation": "constant_propagation",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "(<cache>('7') = (/* select#3 */ select `t2`.`col_int_key` from `t2`))"
},
{
"transformation": "trivial_condition_removal",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "(<cache>('7') = (/* select#3 */ select `t2`.`col_int_key` from `t2`))"
}
] /* steps */
} /* condition_processing */
},
{
"substitute_generated_columns": {
} /* substitute_generated_columns */
},
{
"table_dependencies": [
{
"table": "`t1`",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits": [
] /* depends_on_map_bits */
}
] /* table_dependencies */
},
{
"ref_optimizer_key_uses": [
] /* ref_optimizer_key_uses */
},
{
"rows_estimation": [
{
"table": "`t1`",
"rows": 1,
"cost": 1,
"table_type": "system",
"empty": false
}
] /* rows_estimation */
},
{
"transformation": {
"select#": 2,
"from": "IN (SELECT)",
"to": "EXISTS (CORRELATED SELECT)",
"put_1_in_SELECT_list": true
} /* transformation */
},
{
"attaching_conditions_to_tables": {
"original_condition": "(<cache>('7') = (/* select#3 */ select `t2`.`col_int_key` from `t2`))",
"attached_conditions_computation": [
] /* attached_conditions_computation */,
"attached_conditions_summary": [
] /* attached_conditions_summary */
} /* attaching_conditions_to_tables */
},
{
"refine_plan": [
] /* refine_plan */
}
] /* steps */
} /* join_optimization */
},
{
"join_optimization": {
"select#": 3,
"steps": [
{
"table_dependencies": [
{
"table": "`t2`",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits": [
] /* depends_on_map_bits */
}
] /* table_dependencies */
},
{
"rows_estimation": [
{
"table": "`t2`",
"rows": 1,
"cost": 1,
"table_type": "system",
"empty": false
}
] /* rows_estimation */
},
{
"attaching_conditions_to_tables": {
"original_condition": null,
"attached_conditions_computation": [
] /* attached_conditions_computation */,
"attached_conditions_summary": [
] /* attached_conditions_summary */
} /* attaching_conditions_to_tables */
},
{
"refine_plan": [
] /* refine_plan */
}
] /* steps */
} /* join_optimization */
},
{
"join_execution": {
"select#": 2,
"steps": [
{
"subselect_execution": {
"select#": 3,
"steps": [
{
"join_execution": {
"select#": 3,
"steps": [
] /* steps */
} /* join_execution */
}
] /* steps */
} /* subselect_execution */
}
] /* steps */
} /* join_execution */
}
] /* steps */
} /* subselect_execution */
},
{
"condition_on_constant_tables": "<in_optimizer>('7',<exists>(/* select#2 */ select 1 from dual where (<cache>('7') = (/* select#3 */ select '7' from dual))))",
"condition_value": true
},
{
"attaching_conditions_to_tables": {
"original_condition": "<in_optimizer>('7',<exists>(/* select#2 */ select 1 from dual where (<cache>('7') = (/* select#3 */ select '7' from dual))))",
"attached_conditions_computation": [
] /* attached_conditions_computation */,
"attached_conditions_summary": [
] /* attached_conditions_summary */
} /* attaching_conditions_to_tables */
},
{
"refine_plan": [
] /* refine_plan */
}
] /* steps */
} /* join_optimization */
},
{
"join_execution": {
"select#": 1,
"steps": [
{
"subselect_execution": {
"select#": 2,
"steps": [
{
"join_execution": {
"select#": 2,
"steps": [
{
"subselect_execution": {
"select#": 3,
"steps": [
] /* steps */
} /* subselect_execution */
}
] /* steps */
} /* join_execution */
}
] /* steps */
} /* subselect_execution */
}
] /* steps */
} /* join_execution */
}
] /* steps */
} 0 0
DROP TABLE where_subselect_19033,t1,t2;
# BUG#12612201 - SEGFAULT IN
# SUBSELECT_UNIQUESUBQUERY_ENGINE::PRINT WITH OPTIMIZER TRACE
CREATE TABLE t1 (
col_int_key int(11) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
col_varchar_nokey varchar(1) DEFAULT NULL
);
CREATE TABLE t2 (
pk int(11) NOT NULL AUTO_INCREMENT,
col_int_key int(11) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
col_varchar_nokey varchar(1) DEFAULT NULL,
PRIMARY KEY (pk)
);
INSERT INTO t2 VALUES (1,4,'v','v'),(20,5,'r','r');
CREATE TABLE t3 (
col_int_key int(11) DEFAULT NULL,
col_varchar_key varchar(1) DEFAULT NULL,
col_varchar_nokey varchar(1) DEFAULT NULL
);
INSERT INTO t3 VALUES (NULL,'j','j'),(8,'c','c');
CREATE TABLE where_updatedelete_20769 select count( alias2 . col_varchar_key ) as field1
from (
(select sq1_alias1 . *
from ( t3 as sq1_alias1
straight_join t1 as sq1_alias2
on (sq1_alias2 . col_varchar_key = sq1_alias1 . col_varchar_key)
)
where sq1_alias1 . col_int_key in (
select c_sq1_alias1 . pk as c_sq1_field1
from t2 as c_sq1_alias1
)
) as alias1
left outer join t1 as alias2
on (alias2 . col_varchar_key = alias1 . col_varchar_key )
)
where ( alias2 . col_varchar_key in (
select sq2_alias1 . col_varchar_nokey as sq2_field1
from t2 as sq2_alias1
where sq2_alias1 . col_int_key in (
select distinct c_sq2_alias1 . col_int_key as c_sq2_field1
from t3 as c_sq2_alias1
)
) )
or alias1 . col_int_key = 2
and alias2 . col_varchar_nokey <= alias1 . col_varchar_nokey
order by alias1 . col_varchar_key , field1
;
UPDATE where_updatedelete_20769 SET field1 = ( select count( alias2 . col_varchar_key ) as field1
from (
(select sq1_alias1 . *
from ( t3 as sq1_alias1
straight_join t1 as sq1_alias2
on (sq1_alias2 . col_varchar_key = sq1_alias1 . col_varchar_key)
)
where sq1_alias1 . col_int_key in (
select c_sq1_alias1 . pk as c_sq1_field1
from t2 as c_sq1_alias1
)
) as alias1
left outer join t1 as alias2
on (alias2 . col_varchar_key = alias1 . col_varchar_key )
)
where ( alias2 . col_varchar_key in (
select sq2_alias1 . col_varchar_nokey as sq2_field1
from t2 as sq2_alias1
where sq2_alias1 . col_int_key in (
select distinct c_sq2_alias1 . col_int_key as c_sq2_field1
from t3 as c_sq2_alias1
)
) )
or alias1 . col_int_key = 2
and alias2 . col_varchar_nokey <= alias1 . col_varchar_nokey
order by alias1 . col_varchar_key , field1
);
DROP TABLE where_updatedelete_20769;
DROP TABLE t1,t2,t3;
# BUG#12710761 - INVALID JSON TRACE ON SUBQUERY IN IN-CLAUSE
CREATE TABLE t1 (col_int_key int, KEY col_int_key (col_int_key));
INSERT INTO t1 VALUES (0),(8),(1),(8);
CREATE TABLE where_subselect_20070
SELECT table2 .col_int_key AS field1,
( SELECT COUNT( col_int_key )
FROM t1
)
FROM t1 AS table1
JOIN t1 AS table2
ON table2 .col_int_key = table1 .col_int_key;
SELECT *
FROM where_subselect_20070
WHERE (field1, ( SELECT COUNT( col_int_key ) FROM t1 )) IN (
SELECT table2 .col_int_key AS field1,
( SELECT COUNT( col_int_key )
FROM t1
)
FROM t1 AS table1
JOIN t1 AS table2
ON table2 .col_int_key = table1 .col_int_key
);
field1 ( SELECT COUNT( col_int_key )
FROM t1
)
0 4
1 4
8 4
8 4
8 4
8 4
select * from information_schema.optimizer_trace;
QUERY TRACE MISSING_BYTES_BEYOND_MAX_MEM_SIZE INSUFFICIENT_PRIVILEGES
SELECT *
FROM where_subselect_20070
WHERE (field1, ( SELECT COUNT( col_int_key ) FROM t1 )) IN (
SELECT table2 .col_int_key AS field1,
( SELECT COUNT( col_int_key )
FROM t1
)
FROM t1 AS table1
JOIN t1 AS table2
ON table2 .col_int_key = table1 .col_int_key
) {
"steps": [
{
"join_preparation": {
"select#": 1,
"steps": [
{
"join_preparation": {
"select#": 3,
"steps": [
{
"join_preparation": {
"select#": 4,
"steps": [
{
"expanded_query": "/* select#4 */ select count(`t1`.`col_int_key`) from `t1`"
}
] /* steps */
} /* join_preparation */
},
{
"expanded_query": "/* select#3 */ select `table2`.`col_int_key` AS `field1`,(/* select#4 */ select count(`t1`.`col_int_key`) from `t1`) from (`t1` `table1` join `t1` `table2` on((`table2`.`col_int_key` = `table1`.`col_int_key`)))"
},
{
"join_preparation": {
"select#": 2,
"steps": [
{
"expanded_query": "/* select#2 */ select count(`t1`.`col_int_key`) from `t1`"
}
] /* steps */
} /* join_preparation */
},
{
"transformation": {
"select#": 3,
"from": "IN (SELECT)",
"to": "semijoin",
"chosen": false
} /* transformation */
},
{
"transformation": {
"select#": 3,
"from": "IN (SELECT)",
"to": "EXISTS (CORRELATED SELECT)",
"chosen": true,
"evaluating_constant_where_conditions": [
] /* evaluating_constant_where_conditions */
} /* transformation */
}
] /* steps */
} /* join_preparation */
},
{
"expanded_query": "/* select#1 */ select `where_subselect_20070`.`field1` AS `field1`,`where_subselect_20070`.`( SELECT COUNT( col_int_key )\nFROM t1\n)` AS `( SELECT COUNT( col_int_key )\nFROM t1\n)` from `where_subselect_20070` where <in_optimizer>((`where_subselect_20070`.`field1`,(/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)),<exists>(/* select#3 */ select `table2`.`col_int_key` AS `field1`,(/* select#4 */ select count(`t1`.`col_int_key`) from `t1`) from (`t1` `table1` join `t1` `table2` on((`table2`.`col_int_key` = `table1`.`col_int_key`))) where ((<cache>(`where_subselect_20070`.`field1`) = `table2`.`col_int_key`) and (<cache>((/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)) = (/* select#4 */ select count(`t1`.`col_int_key`) from `t1`)))))"
},
{
"transformations_to_nested_joins": {
"transformations": [
"JOIN_condition_to_WHERE",
"parenthesis_removal"
] /* transformations */,
"expanded_query": "/* select#3 */ select `table2`.`col_int_key` AS `field1`,(/* select#4 */ select count(`t1`.`col_int_key`) from `t1`) from `t1` `table1` join `t1` `table2` where ((<cache>(`where_subselect_20070`.`field1`) = `table2`.`col_int_key`) and (<cache>((/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)) = (/* select#4 */ select count(`t1`.`col_int_key`) from `t1`)) and (`table2`.`col_int_key` = `table1`.`col_int_key`))"
} /* transformations_to_nested_joins */
}
] /* steps */
} /* join_preparation */
},
{
"join_optimization": {
"select#": 1,
"steps": [
{
"condition_processing": {
"condition": "WHERE",
"original_condition": "<in_optimizer>((`where_subselect_20070`.`field1`,(/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)),<exists>(/* select#3 */ select `table2`.`col_int_key` AS `field1`,(/* select#4 */ select count(`t1`.`col_int_key`) from `t1`) from `t1` `table1` join `t1` `table2` where ((<cache>(`where_subselect_20070`.`field1`) = `table2`.`col_int_key`) and (<cache>((/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)) = (/* select#4 */ select count(`t1`.`col_int_key`) from `t1`)) and (`table2`.`col_int_key` = `table1`.`col_int_key`))))",
"steps": [
{
"transformation": "equality_propagation",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "<in_optimizer>((`where_subselect_20070`.`field1`,(/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)),<exists>(/* select#3 */ select `table2`.`col_int_key` AS `field1`,(/* select#4 */ select count(`t1`.`col_int_key`) from `t1`) from `t1` `table1` join `t1` `table2` where ((<cache>(`where_subselect_20070`.`field1`) = `table2`.`col_int_key`) and (<cache>((/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)) = (/* select#4 */ select count(`t1`.`col_int_key`) from `t1`)) and (`table2`.`col_int_key` = `table1`.`col_int_key`))))"
},
{
"transformation": "constant_propagation",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "<in_optimizer>((`where_subselect_20070`.`field1`,(/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)),<exists>(/* select#3 */ select `table2`.`col_int_key` AS `field1`,(/* select#4 */ select count(`t1`.`col_int_key`) from `t1`) from `t1` `table1` join `t1` `table2` where ((<cache>(`where_subselect_20070`.`field1`) = `table2`.`col_int_key`) and (<cache>((/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)) = (/* select#4 */ select count(`t1`.`col_int_key`) from `t1`)) and (`table2`.`col_int_key` = `table1`.`col_int_key`))))"
},
{
"transformation": "trivial_condition_removal",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "<in_optimizer>((`where_subselect_20070`.`field1`,(/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)),<exists>(/* select#3 */ select `table2`.`col_int_key` AS `field1`,(/* select#4 */ select count(`t1`.`col_int_key`) from `t1`) from `t1` `table1` join `t1` `table2` where ((<cache>(`where_subselect_20070`.`field1`) = `table2`.`col_int_key`) and (<cache>((/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)) = (/* select#4 */ select count(`t1`.`col_int_key`) from `t1`)) and (`table2`.`col_int_key` = `table1`.`col_int_key`))))"
}
] /* steps */
} /* condition_processing */
},
{
"substitute_generated_columns": {
} /* substitute_generated_columns */
},
{
"table_dependencies": [
{
"table": "`where_subselect_20070`",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits": [
] /* depends_on_map_bits */
}
] /* table_dependencies */
},
{
"ref_optimizer_key_uses": [
] /* ref_optimizer_key_uses */
},
{
"rows_estimation": [
{
"table": "`where_subselect_20070`",
"table_scan": {
"rows": 6,
"cost": 2
} /* table_scan */
}
] /* rows_estimation */
},
{
"considered_execution_plans": [
{
"plan_prefix": [
] /* plan_prefix */,
"table": "`where_subselect_20070`",
"best_access_path": {
"considered_access_paths": [
{
"rows_to_scan": 6,
"access_type": "scan",
"resulting_rows": 6,
"cost": 3.219,
"chosen": true
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 6,
"cost_for_plan": 3.219,
"chosen": true
}
] /* considered_execution_plans */
},
{
"attaching_conditions_to_tables": {
"original_condition": "<in_optimizer>((`where_subselect_20070`.`field1`,(/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)),<exists>(/* select#3 */ select `table2`.`col_int_key` AS `field1`,(/* select#4 */ select count(`t1`.`col_int_key`) from `t1`) from `t1` `table1` join `t1` `table2` where ((<cache>(`where_subselect_20070`.`field1`) = `table2`.`col_int_key`) and (<cache>((/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)) = (/* select#4 */ select count(`t1`.`col_int_key`) from `t1`)) and (`table2`.`col_int_key` = `table1`.`col_int_key`))))",
"attached_conditions_computation": [
] /* attached_conditions_computation */,
"attached_conditions_summary": [
{
"table": "`where_subselect_20070`",
"attached": "<in_optimizer>((`where_subselect_20070`.`field1`,(/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)),<exists>(/* select#3 */ select `table2`.`col_int_key` AS `field1`,(/* select#4 */ select count(`t1`.`col_int_key`) from `t1`) from `t1` `table1` join `t1` `table2` where ((<cache>(`where_subselect_20070`.`field1`) = `table2`.`col_int_key`) and (<cache>((/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)) = (/* select#4 */ select count(`t1`.`col_int_key`) from `t1`)) and (`table2`.`col_int_key` = `table1`.`col_int_key`))))"
}
] /* attached_conditions_summary */
} /* attaching_conditions_to_tables */
},
{
"refine_plan": [
{
"table": "`where_subselect_20070`"
}
] /* refine_plan */
}
] /* steps */
} /* join_optimization */
},
{
"join_optimization": {
"select#": 3,
"steps": [
{
"condition_processing": {
"condition": "WHERE",
"original_condition": "((<cache>(`where_subselect_20070`.`field1`) = `table2`.`col_int_key`) and (<cache>((/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)) = (/* select#4 */ select count(`t1`.`col_int_key`) from `t1`)) and (`table2`.`col_int_key` = `table1`.`col_int_key`))",
"steps": [
{
"transformation": "equality_propagation",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "((<cache>(`where_subselect_20070`.`field1`) = `table2`.`col_int_key`) and (<cache>((/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)) = (/* select#4 */ select count(`t1`.`col_int_key`) from `t1`)) and multiple equal(`table2`.`col_int_key`, `table1`.`col_int_key`))"
},
{
"transformation": "constant_propagation",
"subselect_evaluation": [
{
"subselect_execution": {
"select#": 4,
"steps": [
{
"join_optimization": {
"select#": 4,
"steps": [
{
"table_dependencies": [
{
"table": "`t1`",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits": [
] /* depends_on_map_bits */
}
] /* table_dependencies */
},
{
"rows_estimation": [
{
"table": "`t1`",
"table_scan": {
"rows": 4,
"cost": 2
} /* table_scan */
}
] /* rows_estimation */
},
{
"considered_execution_plans": [
{
"plan_prefix": [
] /* plan_prefix */,
"table": "`t1`",
"best_access_path": {
"considered_access_paths": [
{
"rows_to_scan": 4,
"access_type": "scan",
"resulting_rows": 4,
"cost": 2.8068,
"chosen": true
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 4,
"cost_for_plan": 2.8068,
"chosen": true
}
] /* considered_execution_plans */
},
{
"attaching_conditions_to_tables": {
"original_condition": null,
"attached_conditions_computation": [
] /* attached_conditions_computation */,
"attached_conditions_summary": [
{
"table": "`t1`",
"attached": null
}
] /* attached_conditions_summary */
} /* attaching_conditions_to_tables */
},
{
"refine_plan": [
{
"table": "`t1`"
}
] /* refine_plan */
}
] /* steps */
} /* join_optimization */
},
{
"join_execution": {
"select#": 4,
"steps": [
] /* steps */
} /* join_execution */
}
] /* steps */
} /* subselect_execution */
}
] /* subselect_evaluation */,
"resulting_condition": "((<cache>(`where_subselect_20070`.`field1`) = `table2`.`col_int_key`) and (<cache>((/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)) = 4) and multiple equal(`table2`.`col_int_key`, `table1`.`col_int_key`))"
},
{
"transformation": "trivial_condition_removal",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "((<cache>(`where_subselect_20070`.`field1`) = `table2`.`col_int_key`) and (<cache>((/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)) = 4) and multiple equal(`table2`.`col_int_key`, `table1`.`col_int_key`))"
}
] /* steps */
} /* condition_processing */
},
{
"substitute_generated_columns": {
} /* substitute_generated_columns */
},
{
"table_dependencies": [
{
"table": "`t1` `table1`",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits": [
] /* depends_on_map_bits */
},
{
"table": "`t1` `table2`",
"row_may_be_null": false,
"map_bit": 1,
"depends_on_map_bits": [
] /* depends_on_map_bits */
}
] /* table_dependencies */
},
{
"ref_optimizer_key_uses": [
{
"table": "`t1` `table1`",
"field": "col_int_key",
"equals": "<cache>(`where_subselect_20070`.`field1`)",
"null_rejecting": false
},
{
"table": "`t1` `table1`",
"field": "col_int_key",
"equals": "`table2`.`col_int_key`",
"null_rejecting": true
},
{
"table": "`t1` `table2`",
"field": "col_int_key",
"equals": "<cache>(`where_subselect_20070`.`field1`)",
"null_rejecting": false
},
{
"table": "`t1` `table2`",
"field": "col_int_key",
"equals": "`table1`.`col_int_key`",
"null_rejecting": true
}
] /* ref_optimizer_key_uses */
},
{
"rows_estimation": [
{
"table": "`t1` `table1`",
"table_scan": {
"rows": 4,
"cost": 2
} /* table_scan */
},
{
"table": "`t1` `table2`",
"table_scan": {
"rows": 4,
"cost": 2
} /* table_scan */
}
] /* rows_estimation */
},
{
"considered_execution_plans": [
{
"plan_prefix": [
] /* plan_prefix */,
"table": "`t1` `table1`",
"best_access_path": {
"considered_access_paths": [
{
"access_type": "ref",
"index": "col_int_key",
"rows": 2,
"cost": 1.4233,
"chosen": true
},
{
"access_type": "scan",
"cost": 2.8,
"rows": 4,
"chosen": false,
"cause": "cost"
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 2,
"cost_for_plan": 1.4233,
"rest_of_plan": [
{
"plan_prefix": [
"`t1` `table1`"
] /* plan_prefix */,
"table": "`t1` `table2`",
"best_access_path": {
"considered_access_paths": [
{
"access_type": "ref",
"index": "col_int_key",
"rows": 2,
"cost": 2.8465,
"chosen": true
},
{
"rows_to_scan": 4,
"access_type": "scan",
"using_join_cache": true,
"buffers_needed": 1,
"resulting_rows": 4,
"cost": 3.6069,
"chosen": false
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 4,
"cost_for_plan": 4.2698,
"chosen": true
}
] /* rest_of_plan */
},
{
"plan_prefix": [
] /* plan_prefix */,
"table": "`t1` `table2`",
"best_access_path": {
"considered_access_paths": [
{
"access_type": "ref",
"index": "col_int_key",
"rows": 2,
"cost": 1.4233,
"chosen": true
},
{
"access_type": "scan",
"cost": 2.8,
"rows": 4,
"chosen": false,
"cause": "cost"
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 2,
"cost_for_plan": 1.4233,
"rest_of_plan": [
{
"plan_prefix": [
"`t1` `table2`"
] /* plan_prefix */,
"table": "`t1` `table1`",
"best_access_path": {
"considered_access_paths": [
{
"access_type": "ref",
"index": "col_int_key",
"rows": 2,
"cost": 2.8465,
"chosen": true
},
{
"rows_to_scan": 4,
"access_type": "scan",
"using_join_cache": true,
"buffers_needed": 1,
"resulting_rows": 4,
"cost": 3.6069,
"chosen": false
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 4,
"cost_for_plan": 4.2698,
"pruned_by_cost": true
}
] /* rest_of_plan */
}
] /* considered_execution_plans */
},
{
"transformation": {
"select#": 3,
"from": "IN (SELECT)",
"to": "EXISTS (CORRELATED SELECT)",
"put_1_in_SELECT_list": true
} /* transformation */
},
{
"attaching_conditions_to_tables": {
"original_condition": "((`table2`.`col_int_key` = `table1`.`col_int_key`) and (<cache>(`where_subselect_20070`.`field1`) = `table1`.`col_int_key`) and (<cache>((/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)) = 4))",
"attached_conditions_computation": [
] /* attached_conditions_computation */,
"attached_conditions_summary": [
{
"table": "`t1` `table1`",
"attached": "(<cache>((/* select#2 */ select count(`t1`.`col_int_key`) from `t1`)) = 4)"
},
{
"table": "`t1` `table2`",
"attached": "(`table2`.`col_int_key` = `table1`.`col_int_key`)"
}
] /* attached_conditions_summary */
} /* attaching_conditions_to_tables */
},
{
"refine_plan": [
{
"table": "`t1` `table1`"
},
{
"table": "`t1` `table2`"
}
] /* refine_plan */
}
] /* steps */
} /* join_optimization */
},
{
"join_optimization": {
"select#": 2,
"steps": [
{
"table_dependencies": [
{
"table": "`t1`",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits": [
] /* depends_on_map_bits */
}
] /* table_dependencies */
},
{
"rows_estimation": [
{
"table": "`t1`",
"table_scan": {
"rows": 4,
"cost": 2
} /* table_scan */
}
] /* rows_estimation */
},
{
"considered_execution_plans": [
{
"plan_prefix": [
] /* plan_prefix */,
"table": "`t1`",
"best_access_path": {
"considered_access_paths": [
{
"rows_to_scan": 4,
"access_type": "scan",
"resulting_rows": 4,
"cost": 2.8068,
"chosen": true
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 4,
"cost_for_plan": 2.8068,
"chosen": true
}
] /* considered_execution_plans */
},
{
"attaching_conditions_to_tables": {
"original_condition": null,
"attached_conditions_computation": [
] /* attached_conditions_computation */,
"attached_conditions_summary": [
{
"table": "`t1`",
"attached": null
}
] /* attached_conditions_summary */
} /* attaching_conditions_to_tables */
},
{
"refine_plan": [
{
"table": "`t1`"
}
] /* refine_plan */
}
] /* steps */
} /* join_optimization */
},
{
"join_execution": {
"select#": 1,
"steps": [
{
"subselect_execution": {
"select#": 2,
"steps": [
{
"join_execution": {
"select#": 2,
"steps": [
] /* steps */
} /* join_execution */
}
] /* steps */
} /* subselect_execution */
},
{
"subselect_execution": {
"select#": 2,
"steps": [
] /* steps */
} /* subselect_execution */
},
{
"subselect_execution": {
"select#": 3,
"steps": [
{
"join_execution": {
"select#": 3,
"steps": [
] /* steps */
} /* join_execution */
}
] /* steps */
} /* subselect_execution */
},
{
"subselect_execution": {
"select#": 2,
"steps": [
] /* steps */
} /* subselect_execution */
},
{
"subselect_execution": {
"select#": 2,
"steps": [
] /* steps */
} /* subselect_execution */
},
{
"subselect_execution": {
"select#": 3,
"steps": [
{
"join_execution": {
"select#": 3,
"steps": [
] /* steps */
} /* join_execution */
}
] /* steps */
} /* subselect_execution */
},
{
"subselect_execution": {
"select#": 2,
"steps": [
] /* steps */
} /* subselect_execution */
},
{
"subselect_execution": {
"select#": 2,
"steps": [
] /* steps */
} /* subselect_execution */
},
{
"subselect_execution": {
"select#": 3,
"steps": [
{
"join_execution": {
"select#": 3,
"steps": [
] /* steps */
} /* join_execution */
}
] /* steps */
} /* subselect_execution */
},
{
"subselect_execution": {
"select#": 2,
"steps": [
] /* steps */
} /* subselect_execution */
},
{
"subselect_execution": {
"select#": 2,
"steps": [
] /* steps */
} /* subselect_execution */
},
{
"subselect_execution": {
"select#": 3,
"steps": [
{
"join_execution": {
"select#": 3,
"steps": [
] /* steps */
} /* join_execution */
}
] /* steps */
} /* subselect_execution */
},
{
"subselect_execution": {
"select#": 2,
"steps": [
] /* steps */
} /* subselect_execution */
},
{
"subselect_execution": {
"select#": 2,
"steps": [
] /* steps */
} /* subselect_execution */
},
{
"subselect_execution": {
"select#": 3,
"steps": [
{
"join_execution": {
"select#": 3,
"steps": [
] /* steps */
} /* join_execution */
}
] /* steps */
} /* subselect_execution */
},
{
"subselect_execution": {
"select#": 2,
"steps": [
] /* steps */
} /* subselect_execution */
},
{
"subselect_execution": {
"select#": 2,
"steps": [
] /* steps */
} /* subselect_execution */
},
{
"subselect_execution": {
"select#": 3,
"steps": [
{
"join_execution": {
"select#": 3,
"steps": [
] /* steps */
} /* join_execution */
}
] /* steps */
} /* subselect_execution */
}
] /* steps */
} /* join_execution */
}
] /* steps */
} 0 0
DROP TABLE where_subselect_20070,t1;
#
# Bug#13430443 - ASSERTION `NEW_TYPE[0] != 'U'' FAILED. WHEN
# OPTIMIZER_TRACE IS ENABLED
#
CREATE TABLE t1
(a INT,b INT,c INT, KEY(a),KEY (a,c)) ENGINE=INNODB;
SELECT 1 FROM t1 WHERE 1 LIKE
(SELECT a FROM t1 WHERE a = 1 ORDER BY c);
1
SELECT * FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
QUERY TRACE MISSING_BYTES_BEYOND_MAX_MEM_SIZE INSUFFICIENT_PRIVILEGES
SELECT 1 FROM t1 WHERE 1 LIKE
(SELECT a FROM t1 WHERE a = 1 ORDER BY c) {
"steps": [
{
"join_preparation": {
"select#": 1,
"steps": [
{
"join_preparation": {
"select#": 2,
"steps": [
{
"expanded_query": "/* select#2 */ select `t1`.`a` from `t1` where (`t1`.`a` = 1) order by `t1`.`c`"
}
] /* steps */
} /* join_preparation */
},
{
"expanded_query": "/* select#1 */ select 1 AS `1` from `t1` where (1 like (/* select#2 */ select `t1`.`a` from `t1` where (`t1`.`a` = 1) order by `t1`.`c`))"
}
] /* steps */
} /* join_preparation */
},
{
"join_optimization": {
"select#": 1,
"steps": [
{
"condition_processing": {
"condition": "WHERE",
"original_condition": "(1 like (/* select#2 */ select `t1`.`a` from `t1` where (`t1`.`a` = 1) order by `t1`.`c`))",
"steps": [
{
"transformation": "equality_propagation",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "(1 like (/* select#2 */ select `t1`.`a` from `t1` where (`t1`.`a` = 1) order by `t1`.`c`))"
},
{
"transformation": "constant_propagation",
"subselect_evaluation": [
] /* subselect_evaluation */,
"resulting_condition": "(1 like (/* select#2 */ select `t1`.`a` from `t1` where (`t1`.`a` = 1) order by `t1`.`c`))"
},
{
"transformation": "trivial_condition_removal",
"subselect_evaluation": [
{
"subselect_execution": {
"select#": 2,
"steps": [
{
"join_optimization": {
"select#": 2,
"steps": [
{
"condition_processing": {
"condition": "WHERE",
"original_condition": "(`t1`.`a` = 1)",
"steps": [
{
"transformation": "equality_propagation",
"resulting_condition": "multiple equal(1, `t1`.`a`)"
},
{
"transformation": "constant_propagation",
"resulting_condition": "multiple equal(1, `t1`.`a`)"
},
{
"transformation": "trivial_condition_removal",
"resulting_condition": "multiple equal(1, `t1`.`a`)"
}
] /* steps */
} /* condition_processing */
},
{
"substitute_generated_columns": {
} /* substitute_generated_columns */
},
{
"table_dependencies": [
{
"table": "`t1`",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits": [
] /* depends_on_map_bits */
}
] /* table_dependencies */
},
{
"ref_optimizer_key_uses": [
{
"table": "`t1`",
"field": "a",
"equals": "1",
"null_rejecting": false
},
{
"table": "`t1`",
"field": "a",
"equals": "1",
"null_rejecting": false
}
] /* ref_optimizer_key_uses */
},
{
"rows_estimation": [
{
"table": "`t1`",
"range_analysis": {
"table_scan": {
"rows": 1,
"cost": 3.3
} /* table_scan */,
"potential_range_indexes": [
{
"index": "a",
"usable": true,
"key_parts": [
"a"
] /* key_parts */
},
{
"index": "a_2",
"usable": true,
"key_parts": [
"a",
"c"
] /* key_parts */
}
] /* potential_range_indexes */,
"best_covering_index_scan": {
"index": "a_2",
"cost": 1.2,
"chosen": true
} /* best_covering_index_scan */,
"setup_range_conditions": [
] /* setup_range_conditions */,
"group_index_range": {
"chosen": false,
"cause": "not_group_by_or_distinct"
} /* group_index_range */,
"analyzing_range_alternatives": {
"range_scan_alternatives": [
{
"index": "a",
"ranges": [
"1 <= a <= 1"
] /* ranges */,
"index_dives_for_eq_ranges": true,
"rowid_ordered": true,
"using_mrr": false,
"index_only": false,
"rows": 1,
"cost": 2.21,
"chosen": false,
"cause": "cost"
},
{
"index": "a_2",
"ranges": [
"1 <= a <= 1"
] /* ranges */,
"index_dives_for_eq_ranges": true,
"rowid_ordered": false,
"using_mrr": false,
"index_only": true,
"rows": 1,
"cost": 1.21,
"chosen": false,
"cause": "cost"
}
] /* range_scan_alternatives */,
"analyzing_roworder_intersect": {
"usable": false,
"cause": "too_few_roworder_scans"
} /* analyzing_roworder_intersect */
} /* analyzing_range_alternatives */
} /* range_analysis */
}
] /* rows_estimation */
},
{
"considered_execution_plans": [
{
"plan_prefix": [
] /* plan_prefix */,
"table": "`t1`",
"best_access_path": {
"considered_access_paths": [
{
"access_type": "ref",
"index": "a",
"rows": 1,
"cost": 1.2,
"chosen": true
},
{
"access_type": "ref",
"index": "a_2",
"rows": 1,
"cost": 1.2,
"chosen": false
},
{
"access_type": "scan",
"chosen": false,
"cause": "covering_index_better_than_full_scan"
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 1,
"cost_for_plan": 1.2,
"chosen": true
}
] /* considered_execution_plans */
},
{
"attaching_conditions_to_tables": {
"original_condition": "(`t1`.`a` = 1)",
"attached_conditions_computation": [
] /* attached_conditions_computation */,
"attached_conditions_summary": [
{
"table": "`t1`",
"attached": null
}
] /* attached_conditions_summary */
} /* attaching_conditions_to_tables */
},
{
"clause_processing": {
"clause": "ORDER BY",
"original_clause": "`t1`.`c`",
"items": [
{
"item": "`t1`.`c`"
}
] /* items */,
"resulting_clause_is_simple": true,
"resulting_clause": "`t1`.`c`"
} /* clause_processing */
},
{
"added_back_ref_condition": "((`t1`.`a` <=> 1))"
},
{
"reconsidering_access_paths_for_index_ordering": {
"clause": "ORDER BY",
"steps": [
] /* steps */,
"index_order_summary": {
"table": "`t1`",
"index_provides_order": true,
"order_direction": "asc",
"index": "a_2",
"plan_changed": true,
"access_type": "ref"
} /* index_order_summary */
} /* reconsidering_access_paths_for_index_ordering */
},
{
"refine_plan": [
{
"table": "`t1`"
}
] /* refine_plan */
}
] /* steps */
} /* join_optimization */
},
{
"join_execution": {
"select#": 2,
"steps": [
] /* steps */
} /* join_execution */
}
] /* steps */
} /* subselect_execution */
}
] /* subselect_evaluation */,
"resulting_condition": null
}
] /* steps */
} /* condition_processing */
}
] /* steps */,
"empty_result": {
"cause": "Impossible WHERE"
} /* empty_result */
} /* join_optimization */
},
{
"join_execution": {
"select#": 1,
"steps": [
] /* steps */
} /* join_execution */
}
] /* steps */
} 0 0
DROP TABLE t1;
#
# Bug #18346750 OPTIMIZER_TRACE & DBUG_PRINT CRASH IN ST_SELECT_LEX::PRINT
#
CREATE TABLE t1 (a INT, PRIMARY KEY (a))
PARTITION BY KEY (a) PARTITIONS 2;
Warnings:
Warning 1287 The partition engine, used by table 'test.t1', is deprecated and will be removed in a future release. Please use native partitioning instead.
INSERT INTO t1 VALUES (1),(2);
Warnings:
Warning 1287 The partition engine, used by table 'test.t1', is deprecated and will be removed in a future release. Please use native partitioning instead.
SELECT 1 FROM t1 ,t1 w
WHERE t1.a <=> (SELECT 22 FROM t1 GROUP BY (SELECT 1 FROM t1));
ERROR 21000: Subquery returns more than 1 row
SELECT TRACE LIKE "%select had some error%" FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
TRACE LIKE "%select had some error%"
0
DROP TABLE t1;
#
# Bug#18791851 CRASH IN ST_SELECT_LEX::PRINT WITH OPTIMIZER_TRACE ON SUBQUERY
#
CREATE TABLE t1 (
pk INT NOT NULL,
col_int_nokey INT,
col_int_key INT,
col_time_key time,
col_varchar_key VARCHAR(1),
col_varchar_nokey VARCHAR(1),
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key,col_int_key)
);
CREATE TABLE t2 (
pk INT NOT NULL,
col_int_nokey INT,
col_int_key INT,
col_varchar_key VARCHAR(1),
col_varchar_nokey VARCHAR(1),
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key,col_int_key)
);
CREATE TABLE t3 (
pk INT NOT NULL,
col_int_nokey INT,
col_int_key INT,
col_varchar_key VARCHAR(1),
col_varchar_nokey VARCHAR(1),
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key,col_int_key)
);
CREATE TABLE t4 (
pk INT NOT NULL,
col_int_nokey INT,
col_int_key INT,
col_time_key time,
col_varchar_key VARCHAR(1),
col_varchar_nokey VARCHAR(1),
PRIMARY KEY (pk),
KEY col_varchar_key (col_varchar_key,col_int_key)
);
SELECT alias1.col_int_nokey AS field1,
alias2.col_varchar_key AS field2,
alias1.col_time_key AS field3,
MIN( alias1.col_int_nokey ) AS field4
FROM (
(
SELECT SQ1_alias1.*
FROM ( t1 AS SQ1_alias1, t2 AS SQ1_alias2 )
) AS alias1,
t4 AS alias2
)
WHERE
EXISTS (
SELECT DISTINCT SQ2_alias2.col_varchar_nokey AS SQ2_field1
FROM t2 AS SQ2_alias1
INNER JOIN (t4 AS SQ2_alias2
INNER JOIN t3 AS SQ2_alias3
ON SQ2_alias3.pk = SQ2_alias2.pk)
ON SQ2_alias3.col_varchar_key = SQ2_alias2.col_varchar_nokey
)
AND alias1.col_int_key = alias2.pk
HAVING alias1.col_int_nokey IN ( SELECT 2 FROM DUAL ) ;
field1 field2 field3 field4
DROP TABLE t1,t2,t3,t4;
CREATE TABLE t1(a INT);
SET @a:=(SELECT ROW(1, 2)=
ROW((SELECT 1 FROM t1 LEFT JOIN t1 t2 ON 1
HAVING 3 IN (SELECT 2 FROM DUAL)),
1));
DROP TABLE t1;
#
# Bug #18945693 CRASH IN PRINT_TABLE_ARRAY AT SQL/SQL_LEX.CC ON 2ND EXEC OF PREPARED STATEMENT
#
CREATE TABLE t1 (
pk INT NOT NULL,
col_int_nokey INT,
col_int_key INT,
col_varchar_key VARCHAR(1),
col_varchar_nokey VARCHAR(1)
);
INSERT INTO t1 VALUES (13,7,3,'y','y'),(14,0,4,'c','c');
CREATE TABLE t2 (
pk INT NOT NULL,
col_int_nokey INT,
col_int_key INT,
col_varchar_key VARCHAR(1),
col_varchar_nokey VARCHAR(1)
);
INSERT INTO t2 VALUES (20,9,8,'e','e');
CREATE TABLE t3 (
pk INT NOT NULL,
col_int_nokey INT,
col_int_key INT,
col_varchar_key VARCHAR(1),
col_varchar_nokey VARCHAR(1)
);
INSERT INTO t3 VALUES (1,1,7,'k','k');
PREPARE prep_stmt FROM "
SELECT
alias1.col_varchar_nokey AS field1,
MAX(alias1.pk) AS field2
FROM t3 AS alias1
GROUP BY field1
HAVING
1 > (
SELECT MAX(SQ4_alias1.col_varchar_nokey)
FROM t1 AS SQ4_alias1
RIGHT OUTER JOIN
(
t2 AS SQ4_alias2
JOIN t1 AS SQ4_alias3
ON SQ4_alias3.col_int_key = SQ4_alias2.col_int_nokey
)
ON SQ4_alias3.pk = SQ4_alias2.col_int_nokey
)
";
EXECUTE prep_stmt;
field1 field2
EXECUTE prep_stmt;
field1 field2
DROP TABLE t1,t2,t3;
#
# Bug#19063289 CRASH IN PRINT_TABLE_ARRAY ON 2ND EXECUTION OF PS WITH SUBQUERY AND VIEW
#
CREATE TABLE B (
pk INTEGER,
col_int_key INTEGER,
col_varchar_nokey VARCHAR(1)
);
CREATE TABLE C (
col_int_nokey INTEGER,
col_int_key INTEGER,
col_varchar_key VARCHAR(1),
col_varchar_nokey VARCHAR(1)
) ;
CREATE TABLE CC (
pk INTEGER,
col_int_key INTEGER
) ENGINE=MYISAM;
INSERT INTO CC VALUES (1, 0),(2, 7);
PREPARE stmt FROM "
SELECT
alias1.col_int_key AS field1 ,
COUNT(alias1.pk) AS field2
FROM
CC AS alias1
GROUP BY field1
HAVING
alias1.col_int_key >
(
SELECT
MAX( SQ2_alias2.col_int_key ) AS SQ2_field1
FROM
C AS SQ2_alias1 LEFT JOIN
( B AS SQ2_alias2 INNER JOIN C AS SQ2_alias3
ON 1)
ON 1
)
OR field2 < 2
";
EXECUTE stmt;
field1 field2
0 1
7 1
EXECUTE stmt;
field1 field2
0 1
7 1
DROP TABLE B,C,CC;
#
# Bug #23259872: OPTIMIZER CHOOSES TO USE NON PRIMARY
# INDEX, EVEN THOUGH COST IS HIGHER
#
CREATE TABLE t1 (
a TINYTEXT NOT NULL,
b TINYINT(3) UNSIGNED NOT NULL,
PRIMARY KEY (a(32),b),
KEY b_idx(b)
) ENGINE=INNODB;
INSERT INTO t1 VALUES ('a',1),('a',2),('a',3),('b',1),('c',1),('c',4),('e',2);
ANALYZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 analyze status OK
SET @optimizer_switch_saved=@@session.optimizer_switch;
SET @@session.optimizer_switch=default;
SELECT COUNT(*) FROM t1;
COUNT(*)
7
EXPLAIN SELECT * FROM t1 WHERE a IN ('a', 'b') AND b = 2;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL range PRIMARY,b_idx b_idx 35 NULL 2 100.00 Using index condition; Using where
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b` from `test`.`t1` where ((`test`.`t1`.`b` = 2) and (`test`.`t1`.`a` in ('a','b')))
SELECT TRACE into @trace FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
SELECT @trace RLIKE "rerunning_range_optimizer_for_single_index";
@trace RLIKE "rerunning_range_optimizer_for_single_index"
1
SET @@session.optimizer_switch=@optimizer_switch_saved;
DROP TABLE t1;
#
# Bug #23227428: SQL PLAN IS NOT ACCORDING WITH OPTIMIZER_TRACE
#
CREATE TABLE t1(c1 INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
c2 CHAR(12)) ENGINE=INNODB;
ANALYZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 analyze status OK
EXPLAIN SELECT c1, c2 FROM t1 ORDER BY c1 DESC LIMIT 1;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index NULL PRIMARY 4 NULL 1 100.00 NULL
Warnings:
Note 1003 /* select#1 */ select `test`.`t1`.`c1` AS `c1`,`test`.`t1`.`c2` AS `c2` from `test`.`t1` order by `test`.`t1`.`c1` desc limit 1
SELECT * FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE;
QUERY TRACE MISSING_BYTES_BEYOND_MAX_MEM_SIZE INSUFFICIENT_PRIVILEGES
EXPLAIN SELECT c1, c2 FROM t1 ORDER BY c1 DESC LIMIT 1 {
"steps": [
{
"join_preparation": {
"select#": 1,
"steps": [
{
"expanded_query": "/* select#1 */ select `t1`.`c1` AS `c1`,`t1`.`c2` AS `c2` from `t1` order by `t1`.`c1` desc limit 1"
}
] /* steps */
} /* join_preparation */
},
{
"join_optimization": {
"select#": 1,
"steps": [
{
"substitute_generated_columns": {
} /* substitute_generated_columns */
},
{
"table_dependencies": [
{
"table": "`t1`",
"row_may_be_null": false,
"map_bit": 0,
"depends_on_map_bits": [
] /* depends_on_map_bits */
}
] /* table_dependencies */
},
{
"rows_estimation": [
{
"table": "`t1`",
"table_scan": {
"rows": 1000,
"cost": 1
} /* table_scan */
}
] /* rows_estimation */
},
{
"considered_execution_plans": [
{
"plan_prefix": [
] /* plan_prefix */,
"table": "`t1`",
"best_access_path": {
"considered_access_paths": [
{
"rows_to_scan": 1000,
"access_type": "scan",
"resulting_rows": 1000,
"cost": 201,
"chosen": true
}
] /* considered_access_paths */
} /* best_access_path */,
"condition_filtering_pct": 100,
"rows_for_plan": 1000,
"cost_for_plan": 201,
"chosen": true
}
] /* considered_execution_plans */
},
{
"attaching_conditions_to_tables": {
"original_condition": null,
"attached_conditions_computation": [
] /* attached_conditions_computation */,
"attached_conditions_summary": [
{
"table": "`t1`",
"attached": null
}
] /* attached_conditions_summary */
} /* attaching_conditions_to_tables */
},
{
"clause_processing": {
"clause": "ORDER BY",
"original_clause": "`t1`.`c1` desc",
"items": [
{
"item": "`t1`.`c1`"
}
] /* items */,
"resulting_clause_is_simple": true,
"resulting_clause": "`t1`.`c1` desc"
} /* clause_processing */
},
{
"reconsidering_access_paths_for_index_ordering": {
"clause": "ORDER BY",
"steps": [
] /* steps */,
"index_order_summary": {
"table": "`t1`",
"index_provides_order": true,
"order_direction": "desc",
"index": "PRIMARY",
"plan_changed": true,
"access_type": "index"
} /* index_order_summary */
} /* reconsidering_access_paths_for_index_ordering */
},
{
"refine_plan": [
{
"table": "`t1`"
}
] /* refine_plan */
}
] /* steps */
} /* join_optimization */
},
{
"join_explain": {
"select#": 1,
"steps": [
] /* steps */
} /* join_explain */
}
] /* steps */
} 0 0
DROP TABLE t1;
#
# BUG#18365641: SERVER EXIT IN TRACE OF QUICK SELECT
#
CREATE TABLE t1 (
pk INT(11),
i1 INT(11),
vc VARCHAR(10),
vc2 VARCHAR(10),
PRIMARY KEY (pk),
KEY i1 (i1),
KEY vc (vc)
) ENGINE=InnoDB;
INSERT INTO t1 VALUES (1, -1281753088,'p','r');
INSERT INTO t1 VALUES (4, NULL,'a','i');
INSERT INTO t1 VALUES (5, NULL,'lhtrovamzq','t');
INSERT INTO t1 VALUES (6, 3,'d','RZDUH');
INSERT INTO t1 VALUES (7, 951910400,'z','it\'s');
INSERT INTO t1 VALUES (8, 1067319296,'get','WZJHD');
INSERT INTO t1 VALUES (9, -1666187264,'zqrdcenchy','me');
INSERT INTO t1 VALUES (10, NULL,'what','there');
CREATE TABLE t2 (
vc VARCHAR(10),
pk INT(11),
PRIMARY KEY (pk),
KEY vc2 (vc)
);
INSERT INTO t2 VALUES ('ukkoeiwsgp',1);
EXPLAIN
SELECT *
FROM t1 LEFT JOIN t2
ON t1.i1 < t2.vc
WHERE t1.vc IN ( 'AVZPQ' )
OR t1.i1 IS NULL AND t1.pk >= 9;
id select_type table partitions type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 NULL index_merge PRIMARY,i1,vc vc,i1,PRIMARY 13,9,4 NULL 2 100.00 Using union(vc,intersect(i1,PRIMARY)); Using where
1 SIMPLE t2 NULL ALL vc2 NULL NULL NULL 1 100.00 Using where; Using join buffer (Block Nested Loop)
Warnings:
Warning 1739 Cannot use range access on index 'vc2' due to type or collation conversion on field 'vc'
Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk`,`test`.`t1`.`i1` AS `i1`,`test`.`t1`.`vc` AS `vc`,`test`.`t1`.`vc2` AS `vc2`,`test`.`t2`.`vc` AS `vc`,`test`.`t2`.`pk` AS `pk` from `test`.`t1` left join `test`.`t2` on((`test`.`t1`.`i1` < `test`.`t2`.`vc`)) where ((`test`.`t1`.`vc` = 'AVZPQ') or (isnull(`test`.`t1`.`i1`) and (`test`.`t1`.`pk` >= 9)))
SELECT *
FROM t1 LEFT JOIN t2
ON t1.i1 < t2.vc
WHERE t1.vc IN ( 'AVZPQ' )
OR t1.i1 IS NULL AND t1.pk >= 9;
pk i1 vc vc2 vc pk
10 NULL what there NULL NULL
DROP TABLE t1, t2;