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MDEV-7317: Make an index ignorable to the optimizer

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This feature adds the functionality of ignorability for indexes.
Indexes are not ignored be default.

To control index ignorability explicitly for a new index,
use IGNORE or NOT IGNORE as part of the index definition for
CREATE TABLE, CREATE INDEX, or ALTER TABLE.

Primary keys (explicit or implicit) cannot be made ignorable.

The table INFORMATION_SCHEMA.STATISTICS get a new column named IGNORED that
would store whether an index needs to be ignored or not.
This commit is contained in:
Varun Gupta
2021-02-25 19:59:51 +05:30
parent 71d30d01aa
commit f691d9865b
108 changed files with 2541 additions and 1422 deletions
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38
mysql-test/suite/innodb_gis/r/create_spatial_index.result
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@@ -7,12 +7,12 @@ CREATE SPATIAL INDEX idx3 on tab(c4 ASC) KEY_BLOCK_SIZE=8 ;
CREATE SPATIAL INDEX idx4 on tab(c5 DESC) KEY_BLOCK_SIZE=4
COMMENT 'Spatial index on Geometry type column';
SHOW INDEXES FROM tab;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment
tab 0 PRIMARY 1 c1 A 0 NULL NULL BTREE
tab 1 idx1 1 c2 A NULL 32 NULL SPATIAL
tab 1 idx2 1 c3 A NULL 32 NULL SPATIAL wl6968
tab 1 idx3 1 c4 A NULL 32 NULL SPATIAL
tab 1 idx4 1 c5 A NULL 32 NULL SPATIAL Spatial index on Geometry type column
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Ignored
tab 0 PRIMARY 1 c1 A 0 NULL NULL BTREE NO
tab 1 idx1 1 c2 A NULL 32 NULL SPATIAL NO
tab 1 idx2 1 c3 A NULL 32 NULL SPATIAL wl6968 NO
tab 1 idx3 1 c4 A NULL 32 NULL SPATIAL NO
tab 1 idx4 1 c5 A NULL 32 NULL SPATIAL Spatial index on Geometry type column NO
INSERT INTO tab(c1,c2,c3,c4,c5)
VALUES(1,ST_GeomFromText('POINT(10 10)'),ST_GeomFromText('LINESTRING(5 5,20 20,30 30)'),
ST_GeomFromText('POLYGON((30 30,40 40,50 50,30 50,30 40,30 30))'),
@@ -437,11 +437,11 @@ CREATE SPATIAL INDEX idx3 on tab(c4 ASC) KEY_BLOCK_SIZE=2 ;
CREATE SPATIAL INDEX idx4 on tab(c5 DESC) KEY_BLOCK_SIZE=8
COMMENT 'Spatial index on Geometry type column';
SHOW INDEXES FROM tab;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment
tab 1 idx1 1 c2 A NULL 32 NULL SPATIAL
tab 1 idx2 1 c3 A NULL 32 NULL SPATIAL wl6968
tab 1 idx3 1 c4 A NULL 32 NULL SPATIAL
tab 1 idx4 1 c5 A NULL 32 NULL SPATIAL Spatial index on Geometry type column
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Ignored
tab 1 idx1 1 c2 A NULL 32 NULL SPATIAL NO
tab 1 idx2 1 c3 A NULL 32 NULL SPATIAL wl6968 NO
tab 1 idx3 1 c4 A NULL 32 NULL SPATIAL NO
tab 1 idx4 1 c5 A NULL 32 NULL SPATIAL Spatial index on Geometry type column NO
INSERT INTO tab(c1,c2,c3,c4,c5)
VALUES(1,ST_GeomFromText('POINT(10 10)'),ST_GeomFromText('LINESTRING(5 5,20 20,30 30)'),
ST_GeomFromText('POLYGON((30 30,40 40,50 50,30 50,30 40,30 30))'),
@@ -854,12 +854,12 @@ CREATE SPATIAL INDEX idx3 on tab(c4 ASC) KEY_BLOCK_SIZE=16 ;
CREATE SPATIAL INDEX idx4 on tab(c5 DESC) KEY_BLOCK_SIZE=16
COMMENT 'Spatial index on Geometry type column';
SHOW INDEXES FROM tab;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment
tab 0 PRIMARY 1 c1 A 0 NULL NULL BTREE
tab 1 idx1 1 c2 A NULL 32 NULL SPATIAL
tab 1 idx2 1 c3 A NULL 32 NULL SPATIAL wl6968
tab 1 idx3 1 c4 A NULL 32 NULL SPATIAL
tab 1 idx4 1 c5 A NULL 32 NULL SPATIAL Spatial index on Geometry type column
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Ignored
tab 0 PRIMARY 1 c1 A 0 NULL NULL BTREE NO
tab 1 idx1 1 c2 A NULL 32 NULL SPATIAL NO
tab 1 idx2 1 c3 A NULL 32 NULL SPATIAL wl6968 NO
tab 1 idx3 1 c4 A NULL 32 NULL SPATIAL NO
tab 1 idx4 1 c5 A NULL 32 NULL SPATIAL Spatial index on Geometry type column NO
INSERT INTO tab(c2,c3,c4,c5)
VALUES(ST_GeomFromText('POINT(10 10)'),ST_GeomFromText('LINESTRING(5 5,20 20,30 30)'),
ST_GeomFromText('POLYGON((30 30,40 40,50 50,30 50,30 40,30 30))'),
@@ -1255,8 +1255,8 @@ tab CREATE TABLE `tab` (
CONSTRAINT `tab_const` CHECK (cast(`c1` as char charset binary) > 0)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
SHOW INDEX FROM tab;
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment
tab 1 idx1 1 c1 A NULL 32 NULL SPATIAL
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment Index_comment Ignored
tab 1 idx1 1 c1 A NULL 32 NULL SPATIAL NO
set @g1 = ST_GeomFromText('POINT(-1 -2)');
SELECT ST_AsText(c1) FROM tab;
ST_AsText(c1)