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Commit d451d772 authored by Igor Babaev's avatar Igor Babaev
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Fixed bug mdev-9628. 

In the function create_key_parts_for_pseudo_indexes()
the key part structures of pseudo-indexes created for
BLOB fields were set incorrectly.
Also the key parts for long fields must be 'truncated'
up to the maximum length acceptable for key parts.
parent 9d4a0dde
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Showing with 198 additions and 1 deletion
mysql-test/r/selectivity.result
View file @ d451d772
......@@ -1470,3 +1470,50 @@ d
drop table t1;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
set use_stat_tables=@save_use_stat_tables;
#
# Bug mdev-9628: unindexed blob column without min-max statistics
# with optimizer_use_condition_selectivity=3
#
set use_stat_tables='preferably';
set optimizer_use_condition_selectivity=3;
create table t1(col1 char(32));
insert into t1 values ('a'),('b'),('c'),('d'), ('e'),('f'),('g'),('h');
analyze table t1;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
create table t2(col1 text);
insert into t2 values ('a'),('b'),('c'),('d'), ('e'),('f'),('g'),('h');
analyze table t2;
Table Op Msg_type Msg_text
test.t2 analyze status Engine-independent statistics collected
test.t2 analyze status OK
select * from t1 where col1 > 'b' and col1 < 'd';
col1
c
explain extended
select * from t1 where col1 > 'b' and col1 < 'd';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 8 28.57 Using where
Warnings:
Note 1003 select `test`.`t1`.`col1` AS `col1` from `test`.`t1` where ((`test`.`t1`.`col1` > 'b') and (`test`.`t1`.`col1` < 'd'))
select * from t2 where col1 > 'b' and col1 < 'd';
col1
c
explain extended
select * from t2 where col1 > 'b' and col1 < 'd';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 8 100.00 Using where
Warnings:
Note 1003 select `test`.`t2`.`col1` AS `col1` from `test`.`t2` where ((`test`.`t2`.`col1` > 'b') and (`test`.`t2`.`col1` < 'd'))
select * from t2 where col1 < 'b' and col1 > 'd';
col1
explain extended
select * from t2 where col1 < 'b' and col1 > 'd';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
Warnings:
Note 1003 select `test`.`t2`.`col1` AS `col1` from `test`.`t2` where 0
drop table t1,t2;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
set use_stat_tables=@save_use_stat_tables;
mysql-test/r/selectivity_innodb.result
View file @ d451d772
......@@ -1474,6 +1474,53 @@ d
drop table t1;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
set use_stat_tables=@save_use_stat_tables;
#
# Bug mdev-9628: unindexed blob column without min-max statistics
# with optimizer_use_condition_selectivity=3
#
set use_stat_tables='preferably';
set optimizer_use_condition_selectivity=3;
create table t1(col1 char(32));
insert into t1 values ('a'),('b'),('c'),('d'), ('e'),('f'),('g'),('h');
analyze table t1;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
create table t2(col1 text);
insert into t2 values ('a'),('b'),('c'),('d'), ('e'),('f'),('g'),('h');
analyze table t2;
Table Op Msg_type Msg_text
test.t2 analyze status Engine-independent statistics collected
test.t2 analyze status OK
select * from t1 where col1 > 'b' and col1 < 'd';
col1
c
explain extended
select * from t1 where col1 > 'b' and col1 < 'd';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 8 28.57 Using where
Warnings:
Note 1003 select `test`.`t1`.`col1` AS `col1` from `test`.`t1` where ((`test`.`t1`.`col1` > 'b') and (`test`.`t1`.`col1` < 'd'))
select * from t2 where col1 > 'b' and col1 < 'd';
col1
c
explain extended
select * from t2 where col1 > 'b' and col1 < 'd';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 8 100.00 Using where
Warnings:
Note 1003 select `test`.`t2`.`col1` AS `col1` from `test`.`t2` where ((`test`.`t2`.`col1` > 'b') and (`test`.`t2`.`col1` < 'd'))
select * from t2 where col1 < 'b' and col1 > 'd';
col1
explain extended
select * from t2 where col1 < 'b' and col1 > 'd';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
Warnings:
Note 1003 select `test`.`t2`.`col1` AS `col1` from `test`.`t2` where 0
drop table t1,t2;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
set use_stat_tables=@save_use_stat_tables;
set optimizer_switch=@save_optimizer_switch_for_selectivity_test;
set @tmp_ust= @@use_stat_tables;
set @tmp_oucs= @@optimizer_use_condition_selectivity;
......@@ -1560,6 +1607,44 @@ where t1.child_user_id=t3.id and t1.child_group_id is null and t2.lower_group_na
parent_id child_group_id child_user_id id lower_group_name directory_id id
drop table t1,t2,t3;
#
# MDEV-9187: duplicate of bug mdev-9628
#
set use_stat_tables = preferably;
set optimizer_use_condition_selectivity=3;
CREATE TABLE t1 (f1 char(32)) ENGINE=InnoDB;
INSERT INTO t1 VALUES ('foo'),('bar'),('qux');
ANALYZE TABLE t1;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status OK
SELECT * FROM t1 WHERE f1 < 'm';
f1
foo
bar
EXPLAIN EXTENDED
SELECT * FROM t1 WHERE f1 < 'm';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 3 72.09 Using where
Warnings:
Note 1003 select `test`.`t1`.`f1` AS `f1` from `test`.`t1` where (`test`.`t1`.`f1` < 'm')
CREATE TABLE t2 (f1 TEXT) ENGINE=InnoDB;
INSERT INTO t2 VALUES ('foo'),('bar'),('qux');
ANALYZE TABLE t2;
Table Op Msg_type Msg_text
test.t2 analyze status Engine-independent statistics collected
test.t2 analyze status OK
SELECT * FROM t2 WHERE f1 <> 'qux';
f1
foo
bar
EXPLAIN EXTENDED
SELECT * FROM t2 WHERE f1 <> 'qux';
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE t2 ALL NULL NULL NULL NULL 3 100.00 Using where
Warnings:
Note 1003 select `test`.`t2`.`f1` AS `f1` from `test`.`t2` where (`test`.`t2`.`f1` <> 'qux')
DROP TABLE t1,t2;
#
# End of 10.0 tests
#
set use_stat_tables= @tmp_ust;
......
mysql-test/t/selectivity.test
View file @ d451d772
......@@ -992,3 +992,36 @@ drop table t1;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
set use_stat_tables=@save_use_stat_tables;
--echo #
--echo # Bug mdev-9628: unindexed blob column without min-max statistics
--echo # with optimizer_use_condition_selectivity=3
--echo #
set use_stat_tables='preferably';
set optimizer_use_condition_selectivity=3;
create table t1(col1 char(32));
insert into t1 values ('a'),('b'),('c'),('d'), ('e'),('f'),('g'),('h');
analyze table t1;
create table t2(col1 text);
insert into t2 values ('a'),('b'),('c'),('d'), ('e'),('f'),('g'),('h');
analyze table t2;
select * from t1 where col1 > 'b' and col1 < 'd';
explain extended
select * from t1 where col1 > 'b' and col1 < 'd';
select * from t2 where col1 > 'b' and col1 < 'd';
explain extended
select * from t2 where col1 > 'b' and col1 < 'd';
select * from t2 where col1 < 'b' and col1 > 'd';
explain extended
select * from t2 where col1 < 'b' and col1 > 'd';
drop table t1,t2;
set optimizer_use_condition_selectivity=@save_optimizer_use_condition_selectivity;
set use_stat_tables=@save_use_stat_tables;
mysql-test/t/selectivity_innodb.test
View file @ d451d772
......@@ -109,6 +109,31 @@ where t1.child_user_id=t3.id and t1.child_group_id is null and t2.lower_group_na
drop table t1,t2,t3;
--echo #
--echo # MDEV-9187: duplicate of bug mdev-9628
--echo #
set use_stat_tables = preferably;
set optimizer_use_condition_selectivity=3;
CREATE TABLE t1 (f1 char(32)) ENGINE=InnoDB;
INSERT INTO t1 VALUES ('foo'),('bar'),('qux');
ANALYZE TABLE t1;
SELECT * FROM t1 WHERE f1 < 'm';
EXPLAIN EXTENDED
SELECT * FROM t1 WHERE f1 < 'm';
CREATE TABLE t2 (f1 TEXT) ENGINE=InnoDB;
INSERT INTO t2 VALUES ('foo'),('bar'),('qux');
ANALYZE TABLE t2;
SELECT * FROM t2 WHERE f1 <> 'qux';
EXPLAIN EXTENDED
SELECT * FROM t2 WHERE f1 <> 'qux';
DROP TABLE t1,t2;
--echo #
--echo # End of 10.0 tests
--echo #
......
sql/opt_range.cc
View file @ d451d772
......@@ -3345,9 +3345,16 @@ bool create_key_parts_for_pseudo_indexes(RANGE_OPT_PARAM *param,
{
Field *field= *field_ptr;
uint16 store_length;
uint16 max_key_part_length= (uint16) table->file->max_key_part_length();
key_part->key= keys;
key_part->part= 0;
key_part->length= (uint16) field->key_length();
if (field->flags & BLOB_FLAG)
key_part->length= max_key_part_length;
else
{
key_part->length= (uint16) field->key_length();
set_if_smaller(key_part->length, max_key_part_length);
}
store_length= key_part->length;
if (field->real_maybe_null())
store_length+= HA_KEY_NULL_LENGTH;
......
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