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MDEV-23600 Division by 0 in row_search_with_covering_prefix

Browse source 
The InnoDB index fields store bytes, not characters.
Remove some unnecessary conversions from characters to bytes.

This also fixes MDEV-20422 and the wrong-result bug MDEV-12486.
This commit is contained in:
Marko Mäkelä 2020-09-01 15:52:36 +03:00
parent feac078f15
commit 94e9dc95d4
10 changed files with 439 additions and 683 deletions
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5
mysql-test/include/innodb_prefix_index_cluster_optimization.combinations Normal file
View file

@ -0,0 +1,5 @@
[covering]
innodb_prefix_index_cluster_optimization=on
[unoptimized]
innodb_prefix_index_cluster_optimization=off

1
mysql-test/include/innodb_prefix_index_cluster_optimization.inc Normal file
View file

@ -0,0 +1 @@
--source include/have_innodb.inc

57
mysql-test/r/fast_prefix_index_fetch_innodb.result
View file

@ -1,4 +1,4 @@
drop table if exists prefixinno;
SET @save_opt= @@GLOBAL.innodb_prefix_index_cluster_optimization;
set global innodb_prefix_index_cluster_optimization = ON;
show variables like 'innodb_prefix_index_cluster_optimization';
Variable_name Value
@ -346,10 +346,10 @@ f1
🐱🌑
select @cluster_lookups;
@cluster_lookups
2
1
select @cluster_lookups_avoided;
@cluster_lookups_avoided
0
1
# Eligible - record length is shorter than prefix length
SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🌑%';
f1
@ -366,10 +366,10 @@ f1
🌒
select @cluster_lookups;
@cluster_lookups
1
0
select @cluster_lookups_avoided;
@cluster_lookups_avoided
1
2
DROP TABLE t1;
CREATE TABLE t1(
col1 INT,
@ -398,4 +398,49 @@ select @cluster_lookups_avoided;
@cluster_lookups_avoided
0
DROP TABLE t1;
set global innodb_prefix_index_cluster_optimization = OFF;
#
# MDEV-23600 Division by 0 in row_search_with_covering_prefix()
#
CREATE TABLE t(c POINT UNIQUE) ENGINE=InnoDB;
INSERT t SET c=POINT(1,1);
SELECT * FROM t WHERE c > (SELECT MAX(c) FROM t);
c
DROP TABLE t;
#
# MDEV-12486 Wrong results with innodb_prefix_index_cluster_optimization
#
CREATE TABLE wp_blogs (
blog_id bigint(20) NOT NULL auto_increment,
site_id bigint(20) NOT NULL default '0',
domain varchar(200) NOT NULL default '',
path varchar(100) NOT NULL default '',
registered datetime NOT NULL default '0000-00-00 00:00:00',
last_updated datetime NOT NULL default '0000-00-00 00:00:00',
public tinyint(2) NOT NULL default '1',
archived tinyint(2) NOT NULL default '0',
mature tinyint(2) NOT NULL default '0',
spam tinyint(2) NOT NULL default '0',
deleted tinyint(2) NOT NULL default '0',
lang_id int(11) NOT NULL default '0',
PRIMARY KEY (blog_id),
KEY domain (domain(50),path(5)),
KEY lang_id (lang_id)
) ENGINE=InnoDB DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
INSERT INTO wp_blogs (domain, path) VALUES
('domain.no', '/fondsinvesteringer/'), ('domain.no', '/'),
('foo', 'bar'), ('bar', 'foo'), ('foo', 'foo'), ('bar', 'bar'),
('foo', 'foobar'), ('bar', 'foobar'), ('foobar', 'foobar');
SET GLOBAL innodb_prefix_index_cluster_optimization=off;
SELECT blog_id FROM wp_blogs WHERE domain IN ('domain.no')
AND path IN ( '/fondsinvesteringer/', '/' );
blog_id
2
1
SET GLOBAL innodb_prefix_index_cluster_optimization=on;
SELECT blog_id FROM wp_blogs WHERE domain IN ('domain.no')
AND path IN ( '/fondsinvesteringer/', '/' );
blog_id
2
1
DROP TABLE wp_blogs;
SET GLOBAL innodb_prefix_index_cluster_optimization = @save_opt;

295
mysql-test/r/innodb_ext_key,off.rdiff Normal file
View file

@ -0,0 +1,295 @@
@@ -4,7 +4,7 @@
explain
select count(*) from lineitem where l_orderkey=130 and l_shipdate='1992-07-01';
id select_type table type possible_keys key key_len ref rows Extra
-1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate 8 const,const 1 Using index
+1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity PRIMARY 4 const 5 Using where
flush status;
select count(*) from lineitem where l_orderkey=130 and l_shipdate='1992-07-01';
count(*)
@@ -14,7 +14,7 @@
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
-Handler_read_next 1
+Handler_read_next 5
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
@@ -45,7 +45,7 @@
select count(*) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000;
id select_type table type possible_keys key key_len ref rows Extra
-1 SIMPLE lineitem range PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate 8 NULL 1 Using where; Using index
+1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate 4 const 6 Using where; Using index
flush status;
select count(*) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000;
@@ -56,7 +56,7 @@
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
-Handler_read_next 1
+Handler_read_next 6
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
@@ -66,7 +66,7 @@
select l_orderkey, l_linenumber from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
id select_type table type possible_keys key key_len ref rows Extra
-1 SIMPLE lineitem range PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate 8 NULL 3 Using where; Using index
+1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate 4 const 6 Using where; Using index
flush status;
select l_orderkey, l_linenumber from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
@@ -79,7 +79,7 @@
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
-Handler_read_next 3
+Handler_read_next 6
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
@@ -88,7 +88,7 @@
explain
select min(l_orderkey) from lineitem where l_shipdate='1992-07-01';
id select_type table type possible_keys key key_len ref rows Extra
-1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
+1 SIMPLE lineitem ref i_l_shipdate i_l_shipdate 4 const 6 Using index
flush status;
select min(l_orderkey) from lineitem where l_shipdate='1992-07-01';
min(l_orderkey)
@@ -98,7 +98,7 @@
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
-Handler_read_next 0
+Handler_read_next 6
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
@@ -108,7 +108,7 @@
select min(l_orderkey) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
id select_type table type possible_keys key key_len ref rows Extra
-1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
+1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate 4 const 6 Using where; Using index
flush status;
select min(l_orderkey) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
@@ -119,7 +119,7 @@
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
-Handler_read_next 0
+Handler_read_next 6
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
@@ -129,7 +129,7 @@
select max(l_linenumber) from lineitem
where l_shipdate='1992-07-01' and l_orderkey=130;
id select_type table type possible_keys key key_len ref rows Extra
-1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
+1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity PRIMARY 4 const 5 Using where
flush status;
select max(l_linenumber) from lineitem
where l_shipdate='1992-07-01' and l_orderkey=130;
@@ -140,7 +140,7 @@
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
-Handler_read_next 0
+Handler_read_next 5
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
@@ -152,7 +152,7 @@
where l_shipdate='1992-07-01' and l_orderkey=130
or l_receiptdate='1992-07-01' and l_orderkey=5603;
id select_type table type possible_keys key key_len ref rows Extra
-1 SIMPLE lineitem index_merge i_l_shipdate,i_l_receiptdate i_l_shipdate,i_l_receiptdate 8,8 NULL 2 Using union(i_l_shipdate,i_l_receiptdate); Using where
+1 SIMPLE lineitem index_merge i_l_shipdate,i_l_receiptdate i_l_shipdate,i_l_receiptdate 4,4 NULL 9 Using union(i_l_shipdate,i_l_receiptdate); Using where
flush status;
select l_orderkey, l_linenumber
from lineitem use index (i_l_shipdate, i_l_receiptdate)
@@ -166,10 +166,10 @@
Handler_read_first 0
Handler_read_key 2
Handler_read_last 0
-Handler_read_next 2
+Handler_read_next 9
Handler_read_prev 0
Handler_read_retry 0
-Handler_read_rnd 2
+Handler_read_rnd 9
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
explain
@@ -178,7 +178,7 @@
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
id select_type table type possible_keys key key_len ref rows Extra
-1 SIMPLE lineitem index_merge i_l_shipdate,i_l_receiptdate i_l_shipdate,i_l_receiptdate 8,8 NULL 3 Using sort_union(i_l_shipdate,i_l_receiptdate); Using where
+1 SIMPLE lineitem index_merge i_l_shipdate,i_l_receiptdate i_l_shipdate,i_l_receiptdate 4,4 NULL 9 Using union(i_l_shipdate,i_l_receiptdate); Using where
flush status;
select l_orderkey, l_linenumber
from lineitem use index (i_l_shipdate, i_l_receiptdate)
@@ -193,10 +193,10 @@
Handler_read_first 0
Handler_read_key 2
Handler_read_last 0
-Handler_read_next 3
+Handler_read_next 9
Handler_read_prev 0
Handler_read_retry 0
-Handler_read_rnd 3
+Handler_read_rnd 9
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
explain
@@ -204,7 +204,7 @@
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
id select_type table type possible_keys key key_len ref rows Extra
-1 SIMPLE lineitem index_merge PRIMARY,i_l_shipdate,i_l_receiptdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate,i_l_receiptdate 8,8 NULL 3 Using sort_union(i_l_shipdate,i_l_receiptdate); Using where
+1 SIMPLE lineitem index_merge PRIMARY,i_l_shipdate,i_l_receiptdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate,PRIMARY,i_l_receiptdate,PRIMARY 4,4,4,4 NULL 2 Using union(intersect(i_l_shipdate,PRIMARY),intersect(i_l_receiptdate,PRIMARY)); Using where
flush status;
select l_orderkey, l_linenumber from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
@@ -218,7 +218,7 @@
Handler_read_first 0
Handler_read_key 2
Handler_read_last 0
-Handler_read_next 3
+Handler_read_next 9
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 3
@@ -228,7 +228,7 @@
select max(l_orderkey) from lineitem
where l_partkey between 1 and 10 group by l_partkey;
id select_type table type possible_keys key key_len ref rows Extra
-1 SIMPLE lineitem range i_l_suppkey_partkey,i_l_partkey i_l_partkey 5 NULL # Using where; Using index for group-by
+1 SIMPLE lineitem range i_l_suppkey_partkey,i_l_partkey i_l_partkey 5 NULL # Using where; Using index
flush status;
select max(l_orderkey) from lineitem
where l_partkey between 1 and 10 group by l_partkey;
@@ -246,9 +246,9 @@
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
-Handler_read_key 21
-Handler_read_last 1
-Handler_read_next 0
+Handler_read_key 1
+Handler_read_last 0
+Handler_read_next 294
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
@@ -258,7 +258,7 @@
select max(l_orderkey) from lineitem
where l_suppkey in (1,4) group by l_suppkey;
id select_type table type possible_keys key key_len ref rows Extra
-1 SIMPLE lineitem range i_l_suppkey i_l_suppkey 5 NULL # Using where; Using index for group-by
+1 SIMPLE lineitem range i_l_suppkey i_l_suppkey 5 NULL # Using where; Using index
flush status;
select max(l_orderkey) from lineitem
where l_suppkey in (1,4) group by l_suppkey;
@@ -268,9 +268,9 @@
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
-Handler_read_key 6
-Handler_read_last 1
-Handler_read_next 0
+Handler_read_key 2
+Handler_read_last 0
+Handler_read_next 1230
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
@@ -286,7 +286,7 @@
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE part range i_p_retailprice i_p_retailprice 9 NULL # Using where; Using index
1 SIMPLE orders ref PRIMARY,i_o_orderdate i_o_orderdate 4 const # Using index
-1 SIMPLE lineitem ref i_l_partkey i_l_partkey 9 dbt3_s001.part.p_partkey,dbt3_s001.orders.o_orderkey # Using index
+1 SIMPLE lineitem ref i_l_partkey i_l_partkey 5 dbt3_s001.part.p_partkey # Using where; Using index
flush status;
select o_orderkey, p_partkey
from part use index (i_p_retailprice),
@@ -300,7 +300,7 @@
Handler_read_first 0
Handler_read_key 3
Handler_read_last 0
-Handler_read_next 3
+Handler_read_next 26
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
@@ -317,8 +317,8 @@
select * from t0, part ignore index (primary)
where p_partkey=t0.a and p_size=1;
id select_type table type possible_keys key key_len ref rows Extra
-1 SIMPLE t0 ALL NULL NULL NULL NULL 5 Using where
-1 SIMPLE part eq_ref i_p_size i_p_size 9 const,dbt3_s001.t0.a 1
+1 SIMPLE t0 ALL NULL NULL NULL NULL 5
+1 SIMPLE part ref i_p_size i_p_size 5 const 5 Using index condition
select * from t0, part ignore index (primary)
where p_partkey=t0.a and p_size=1;
a p_partkey p_name p_mfgr p_brand p_type p_size p_container p_retailprice p_comment
@@ -495,7 +495,7 @@
select * from t1, t3 where t3.col1=t1.a and t3.col2=t1.a and t3.pk1=t1.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL # Using where
-1 SIMPLE t3 ref PRIMARY,col1 col1 12 test.t1.a,test.t1.a,test.t1.a # Using index
+1 SIMPLE t3 ref PRIMARY,col1 col1 8 test.t1.a,test.t1.a # Using where; Using index
drop table t1,t2,t3;
#
# Bug mdev-4340: performance regression with extended_keys=on
@@ -705,13 +705,13 @@
select * from t1 force index(index_date_updated)
where index_date_updated= 10 and index_id < 800;
id select_type table type possible_keys key key_len ref rows Extra
-1 SIMPLE t1 range index_date_updated index_date_updated 13 NULL # Using index condition
+1 SIMPLE t1 ref index_date_updated index_date_updated 5 const # Using index condition
# This used to work from the start:
explain
select * from t2 force index(index_date_updated)
where index_date_updated= 10 and index_id < 800;
id select_type table type possible_keys key key_len ref rows Extra
-1 SIMPLE t2 range index_date_updated index_date_updated 13 NULL # Using index condition
+1 SIMPLE t2 ref index_date_updated index_date_updated 5 const # Using index condition
drop table t0,t1,t2;
#
# MDEV-11196: Error:Run-Time Check Failure #2 - Stack around the variable 'key_buff'
@@ -746,11 +746,12 @@
"select_id": 1,
"table": {
"table_name": "t1",
- "access_type": "range",
+ "access_type": "ref",
"possible_keys": ["f2"],
"key": "f2",
- "key_length": "3070",
- "used_key_parts": ["f2", "pk1"],
+ "key_length": "3066",
+ "used_key_parts": ["f2"],
+ "ref": ["const"],
"rows": 1,
"filtered": 100,
"index_condition": "t1.pk1 <= 5 and t1.pk2 <= 5 and t1.f2 = 'abc'",
@@ -779,8 +780,8 @@
"access_type": "range",
"possible_keys": ["k1"],
"key": "k1",
- "key_length": "3011",
- "used_key_parts": ["pk1", "f2", "pk2"],
+ "key_length": "3007",
+ "used_key_parts": ["pk1", "f2"],
"rows": 1,
"filtered": 100,
"index_condition": "t1.f2 <= 5 and t1.pk2 <= 5 and t1.pk1 = 'abc'",

422
mysql-test/r/innodb_ext_key.result
View file

@ -1,30 +1,6 @@
DROP TABLE IF EXISTS t1,t2,t3,t4;
DROP DATABASE IF EXISTS dbt3_s001;
SET SESSION STORAGE_ENGINE='InnoDB';
CREATE DATABASE dbt3_s001;
use dbt3_s001;
set @save_ext_key_optimizer_switch=@@optimizer_switch;
set optimizer_switch='extended_keys=off';
explain
select count(*) from lineitem where l_orderkey=130 and l_shipdate='1992-07-01';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity PRIMARY 4 const 5 Using where
flush status;
select count(*) from lineitem where l_orderkey=130 and l_shipdate='1992-07-01';
count(*)
1
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
Handler_read_next 5
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=on';
explain
select count(*) from lineitem where l_orderkey=130 and l_shipdate='1992-07-01';
id select_type table type possible_keys key key_len ref rows Extra
@ -44,29 +20,6 @@ Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=off';
explain
select count(*) from lineitem
where l_orderkey=130 and l_linenumber=2 and l_shipdate='1992-07-01';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE lineitem const PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity PRIMARY 8 const,const 1
flush status;
select count(*) from lineitem
where l_orderkey=130 and l_linenumber=2 and l_shipdate='1992-07-01';
count(*)
1
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=on';
explain
select count(*) from lineitem
where l_orderkey=130 and l_linenumber=2 and l_shipdate='1992-07-01';
@ -88,29 +41,6 @@ Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=off';
explain
select count(*) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate 4 const 6 Using where; Using index
flush status;
select count(*) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000;
count(*)
1
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
Handler_read_next 6
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=on';
explain
select count(*) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000;
@ -132,31 +62,6 @@ Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=off';
explain
select l_orderkey, l_linenumber from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate 4 const 6 Using where; Using index
flush status;
select l_orderkey, l_linenumber from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
l_orderkey l_linenumber
1088 3
1217 1
1221 3
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
Handler_read_next 6
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=on';
explain
select l_orderkey, l_linenumber from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
@ -180,27 +85,6 @@ Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=off';
explain
select min(l_orderkey) from lineitem where l_shipdate='1992-07-01';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE lineitem ref i_l_shipdate i_l_shipdate 4 const 6 Using index
flush status;
select min(l_orderkey) from lineitem where l_shipdate='1992-07-01';
min(l_orderkey)
130
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
Handler_read_next 6
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=on';
explain
select min(l_orderkey) from lineitem where l_shipdate='1992-07-01';
id select_type table type possible_keys key key_len ref rows Extra
@ -220,29 +104,6 @@ Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=off';
explain
select min(l_orderkey) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate 4 const 6 Using where; Using index
flush status;
select min(l_orderkey) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
min(l_orderkey)
1088
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
Handler_read_next 6
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=on';
explain
select min(l_orderkey) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
@ -264,29 +125,6 @@ Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=off';
explain
select max(l_linenumber) from lineitem
where l_shipdate='1992-07-01' and l_orderkey=130;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity PRIMARY 4 const 5 Using where
flush status;
select max(l_linenumber) from lineitem
where l_shipdate='1992-07-01' and l_orderkey=130;
max(l_linenumber)
2
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
Handler_read_next 5
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=on';
explain
select max(l_linenumber) from lineitem
where l_shipdate='1992-07-01' and l_orderkey=130;
@ -308,34 +146,6 @@ Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=off';
explain
select l_orderkey, l_linenumber
from lineitem use index (i_l_shipdate, i_l_receiptdate)
where l_shipdate='1992-07-01' and l_orderkey=130
or l_receiptdate='1992-07-01' and l_orderkey=5603;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE lineitem index_merge i_l_shipdate,i_l_receiptdate i_l_shipdate,i_l_receiptdate 4,4 NULL 9 Using union(i_l_shipdate,i_l_receiptdate); Using where
flush status;
select l_orderkey, l_linenumber
from lineitem use index (i_l_shipdate, i_l_receiptdate)
where l_shipdate='1992-07-01' and l_orderkey=130
or l_receiptdate='1992-07-01' and l_orderkey=5603;
l_orderkey l_linenumber
130 2
5603 2
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 2
Handler_read_last 0
Handler_read_next 9
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 9
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=on';
explain
select l_orderkey, l_linenumber
from lineitem use index (i_l_shipdate, i_l_receiptdate)
@ -362,35 +172,6 @@ Handler_read_retry 0
Handler_read_rnd 2
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=off';
explain
select l_orderkey, l_linenumber
from lineitem use index (i_l_shipdate, i_l_receiptdate)
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE lineitem index_merge i_l_shipdate,i_l_receiptdate i_l_shipdate,i_l_receiptdate 4,4 NULL 9 Using union(i_l_shipdate,i_l_receiptdate); Using where
flush status;
select l_orderkey, l_linenumber
from lineitem use index (i_l_shipdate, i_l_receiptdate)
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
l_orderkey l_linenumber
130 2
5603 2
5959 3
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 2
Handler_read_last 0
Handler_read_next 9
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 9
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=on';
explain
select l_orderkey, l_linenumber
from lineitem use index (i_l_shipdate, i_l_receiptdate)
@ -418,33 +199,6 @@ Handler_read_retry 0
Handler_read_rnd 3
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=off';
explain
select l_orderkey, l_linenumber from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE lineitem index_merge PRIMARY,i_l_shipdate,i_l_receiptdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate,PRIMARY,i_l_receiptdate,PRIMARY 4,4,4,4 NULL 2 Using union(intersect(i_l_shipdate,PRIMARY),intersect(i_l_receiptdate,PRIMARY)); Using where
flush status;
select l_orderkey, l_linenumber from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
l_orderkey l_linenumber
130 2
5603 2
5959 3
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 2
Handler_read_last 0
Handler_read_next 9
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 3
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=on';
explain
select l_orderkey, l_linenumber from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
@ -470,38 +224,6 @@ Handler_read_retry 0
Handler_read_rnd 3
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=off';
explain
select max(l_orderkey) from lineitem
where l_partkey between 1 and 10 group by l_partkey;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE lineitem range i_l_suppkey_partkey,i_l_partkey i_l_partkey 5 NULL # Using where; Using index
flush status;
select max(l_orderkey) from lineitem
where l_partkey between 1 and 10 group by l_partkey;
max(l_orderkey)
5984
5957
5892
5856
5959
5957
5794
5894
5859
5632
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 1
Handler_read_last 0
Handler_read_next 294
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=on';
explain
select max(l_orderkey) from lineitem
where l_partkey between 1 and 10 group by l_partkey;
@ -532,30 +254,6 @@ Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=off';
explain
select max(l_orderkey) from lineitem
where l_suppkey in (1,4) group by l_suppkey;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE lineitem range i_l_suppkey i_l_suppkey 5 NULL # Using where; Using index
flush status;
select max(l_orderkey) from lineitem
where l_suppkey in (1,4) group by l_suppkey;
max(l_orderkey)
5988
5984
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 2
Handler_read_last 0
Handler_read_next 1230
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=on';
explain
select max(l_orderkey) from lineitem
where l_suppkey in (1,4) group by l_suppkey;
@ -579,37 +277,6 @@ Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
create index i_p_retailprice on part(p_retailprice);
set optimizer_switch='extended_keys=off';
explain
select o_orderkey, p_partkey
from part use index (i_p_retailprice),
lineitem use index (i_l_partkey), orders
where p_retailprice > 1100 and o_orderdate='1997-01-01'
and o_orderkey=l_orderkey and p_partkey=l_partkey;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE part range i_p_retailprice i_p_retailprice 9 NULL # Using where; Using index
1 SIMPLE orders ref PRIMARY,i_o_orderdate i_o_orderdate 4 const # Using index
1 SIMPLE lineitem ref i_l_partkey i_l_partkey 5 dbt3_s001.part.p_partkey # Using where; Using index
flush status;
select o_orderkey, p_partkey
from part use index (i_p_retailprice),
lineitem use index (i_l_partkey), orders
where p_retailprice > 1100 and o_orderdate='1997-01-01'
and o_orderkey=l_orderkey and p_partkey=l_partkey;
o_orderkey p_partkey
5895 200
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 3
Handler_read_last 0
Handler_read_next 26
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 0
set optimizer_switch='extended_keys=on';
explain
select o_orderkey, p_partkey
from part use index (i_p_retailprice),
@ -646,7 +313,6 @@ Handler_read_rnd_next 0
create table t0 (a int);
insert into t0 values (1), (2), (3), (4), (5);
create index i_p_size on part(p_size);
set optimizer_switch='extended_keys=on';
explain
select * from t0, part ignore index (primary)
where p_partkey=t0.a and p_size=1;
@ -667,7 +333,6 @@ use test;
#
set @save_optimizer_switch=@@optimizer_switch;
SET optimizer_switch='materialization=on,semijoin=on';
SET optimizer_switch='extended_keys=on';
CREATE TABLE t1 (a int, b int) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1,1), (2,2);
SELECT * FROM t1 WHERE 2 IN (SELECT MAX(s1.a) FROM t1 AS s1, t1 AS s2);
@ -688,9 +353,7 @@ set optimizer_switch=@save_optimizer_switch;
# + extended_keys = on
# (valgrinf complains fixed by the patch for bug #914560)
#
set @save_optimizer_switch=@@optimizer_switch;
SET optimizer_switch = 'derived_with_keys=on';
SET optimizer_switch = 'extended_keys=on';
CREATE TABLE t1 (a varchar(1)) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('j'), ('v');
CREATE TABLE t2 (b varchar(1)) ENGINE=MyISAM;
@ -720,8 +383,6 @@ c int NOT NULL PRIMARY KEY
INSERT INTO t2 VALUES
(10), (11), (12), (13), (14),
(15), (16), (17), (18), (19), (24);
set @save_optimizer_switch=@@optimizer_switch;
SET optimizer_switch = 'extended_keys=off';
EXPLAIN
SELECT a FROM t1 AS t, t2
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
@ -734,20 +395,6 @@ SELECT a FROM t1 AS t, t2
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
a
24
SET optimizer_switch = 'extended_keys=on';
EXPLAIN
SELECT a FROM t1 AS t, t2
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
id select_type table type possible_keys key key_len ref rows Extra
1 PRIMARY t index a,b b 7 NULL 10 Using index
1 PRIMARY t1 ref b b 3 test.t.b 2 Using index
1 PRIMARY t2 index NULL PRIMARY 4 NULL 11 Using index; FirstMatch(t)
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t.a 1 Using index
SELECT a FROM t1 AS t, t2
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
a
24
set optimizer_switch=@save_optimizer_switch;
DROP TABLE t1,t2;
#
# LP Bug #923236: hash join + extended_keys = on
@ -756,12 +403,10 @@ CREATE TABLE t1 (a int) ENGINE=MyISAM;
CREATE TABLE t2 (b int) ENGINE=MyISAM;
INSERT INTO t1 (a) VALUES (4), (6);
INSERT INTO t2 (b) VALUES (0), (8);
set @save_optimizer_switch=@@optimizer_switch;
set @save_join_cache_level=@@join_cache_level;
SET join_cache_level=3;
SET optimizer_switch='join_cache_hashed=on';
SET optimizer_switch='join_cache_bka=on';
SET optimizer_switch='extended_keys=on';
EXPLAIN
SELECT * FROM t1, t2 WHERE b=a;
id select_type table type possible_keys key key_len ref rows Extra
@ -786,26 +431,16 @@ UNIQUE KEY uq (c2,c3),
KEY c3 (c3),
KEY c4 (c4)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;
set @save_optimizer_switch=@@optimizer_switch;
set session optimizer_switch='extended_keys=off';
INSERT INTO t1 (c2, c3, c4) VALUES (58291525, 2580, 'foobar')
ON DUPLICATE KEY UPDATE c4 = VALUES(c4);
INSERT INTO t1 (c2, c3, c4) VALUES (58291525, 2580, 'foobar')
ON DUPLICATE KEY UPDATE c4 = VALUES(c4);
DELETE FROM t1;
set session optimizer_switch='extended_keys=on';
INSERT INTO t1 (c2, c3, c4) VALUES (58291525, 2580, 'foobar')
ON DUPLICATE KEY UPDATE c4 = VALUES(c4);
INSERT INTO t1 (c2, c3, c4) VALUES (58291525, 2580, 'foobar')
ON DUPLICATE KEY UPDATE c4 = VALUES(c4);
set optimizer_switch=@save_optimizer_switch;
DROP TABLE t1;
#
# Bug mdev-4220: using ref instead of eq_ref
# with extended_keys=on
# (performance regression introduced in the patch for mdev-3851)
#
set @save_optimizer_switch=@@optimizer_switch;
create table t1 (a int not null) engine=innodb;
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t2 (
@ -815,29 +450,6 @@ insert into t2
select
A.a + 10 * B.a, A.a + 10 * B.a, A.a + 10 * B.a
from t1 A, t1 B;
set optimizer_switch='extended_keys=off';
explain
select * from t1, t2 where t2.a=t1.a and t2.b < 2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 10
1 SIMPLE t2 eq_ref a a 4 test.t1.a 1 Using where
flush status;
select * from t1, t2 where t2.a=t1.a and t2.b < 2;
a pk a b
0 0 0 0
1 1 1 1
show status like 'handler_read%';
Variable_name Value
Handler_read_first 0
Handler_read_key 10
Handler_read_last 0
Handler_read_next 0
Handler_read_prev 0
Handler_read_retry 0
Handler_read_rnd 0
Handler_read_rnd_deleted 0
Handler_read_rnd_next 11
set optimizer_switch='extended_keys=on';
explain
select * from t1, t2 where t2.a=t1.a and t2.b < 2;
id select_type table type possible_keys key key_len ref rows Extra
@ -874,18 +486,6 @@ analyze table t1,t3;
Table Op Msg_type Msg_text
test.t1 analyze status OK
test.t3 analyze status OK
set optimizer_switch='extended_keys=off';
explain
select * from t1, t3 where t3.col1=t1.a and t3.col2=t1.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL # Using where
1 SIMPLE t3 ref col1 col1 8 test.t1.a,test.t1.a # Using index
explain
select * from t1, t3 where t3.col1=t1.a and t3.col2=t1.a and t3.pk1=t1.a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL # Using where
1 SIMPLE t3 ref PRIMARY,col1 col1 8 test.t1.a,test.t1.a # Using where; Using index
set optimizer_switch='extended_keys=on';
explain
select * from t1, t3 where t3.col1=t1.a and t3.col2=t1.a;
id select_type table type possible_keys key key_len ref rows Extra
@ -900,7 +500,6 @@ drop table t1,t2,t3;
#
# Bug mdev-4340: performance regression with extended_keys=on
#
set @save_optimizer_switch=@@optimizer_switch;
CREATE TABLE t1 (
page_id int(8) unsigned NOT NULL AUTO_INCREMENT,
page_namespace int(11) NOT NULL DEFAULT '0',
@ -1000,16 +599,6 @@ INSERT INTO t3 VALUES
(89,'text-8008',''),(90,'text-9008',''),(91,'text-9',''),(92,'text-1009',''),
(93,'text-2009',''),(94,'text-3009',''),(95,'text-4009',''),(96,'text-5009',''),
(97,'text-6009',''),(98,'text-7009',''),(99,'text-8009',''),(100,'text-9009','');
set optimizer_switch='extended_keys=off';
EXPLAIN
SELECT * FROM t1, t2 IGNORE INDEX (PRIMARY), t3
WHERE page_id=rev_page AND rev_text_id=old_id AND page_namespace=4 AND page_title='Sandbox'
ORDER BY rev_timestamp ASC LIMIT 10;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 const PRIMARY,name_title name_title 261 const,const 1
1 SIMPLE t2 ref page_timestamp page_timestamp 4 const 10 Using where
1 SIMPLE t3 eq_ref PRIMARY PRIMARY 4 test.t2.rev_text_id 1
set optimizer_switch='extended_keys=on';
EXPLAIN
SELECT * FROM t1, t2 IGNORE INDEX (PRIMARY), t3
WHERE page_id=rev_page AND rev_text_id=old_id AND page_namespace=4 AND page_title='Sandbox'
@ -1027,7 +616,6 @@ create table t1 (a bigint not null unique auto_increment, b varchar(10), primary
create table t2 (a bigint not null unique auto_increment, b varchar(10), primary key (a), key (b(2))) engine = innodb default character set utf8;
insert into t1 (b) values (null), (null), (null);
insert into t2 (b) values (null), (null), (null);
set optimizer_switch='extended_keys=on';
explain select a from t1 where b is null order by a desc limit 2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index b PRIMARY 8 NULL 3 Using where
@ -1042,14 +630,6 @@ select a from t2 where b is null order by a desc limit 2;
a
3
2
set optimizer_switch='extended_keys=off';
explain select a from t2 where b is null order by a desc limit 2;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 range b b 9 NULL 3 Using where; Using filesort
select a from t2 where b is null order by a desc limit 2;
a
3
2
explain select a from t2 where b is null order by a desc;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t2 index b PRIMARY 8 NULL 3 Using where
@ -1067,7 +647,6 @@ a
2
1
drop table t1, t2;
set optimizer_switch=@save_optimizer_switch;
#
# MDEV-10325: Queries examines all rows of a tables when it should not
#
@ -1213,7 +792,6 @@ EXPLAIN
}
}
drop table t1;
set optimizer_switch=@save_ext_key_optimizer_switch;
set global innodb_file_format = @save_innodb_file_format;
set global innodb_large_prefix = @save_innodb_large_prefix;
SET SESSION STORAGE_ENGINE=DEFAULT;

52
mysql-test/t/fast_prefix_index_fetch_innodb.test
View file

@ -1,9 +1,6 @@
-- source include/have_innodb.inc
--disable_warnings
drop table if exists prefixinno;
--enable_warnings
SET @save_opt= @@GLOBAL.innodb_prefix_index_cluster_optimization;
set global innodb_prefix_index_cluster_optimization = ON;
show variables like 'innodb_prefix_index_cluster_optimization';
@ -665,4 +662,49 @@ select @cluster_lookups;
select @cluster_lookups_avoided;
DROP TABLE t1;
set global innodb_prefix_index_cluster_optimization = OFF;
--echo #
--echo # MDEV-23600 Division by 0 in row_search_with_covering_prefix()
--echo #
CREATE TABLE t(c POINT UNIQUE) ENGINE=InnoDB;
INSERT t SET c=POINT(1,1);
SELECT * FROM t WHERE c > (SELECT MAX(c) FROM t);
DROP TABLE t;
--echo #
--echo # MDEV-12486 Wrong results with innodb_prefix_index_cluster_optimization
--echo #
CREATE TABLE wp_blogs (
blog_id bigint(20) NOT NULL auto_increment,
site_id bigint(20) NOT NULL default '0',
domain varchar(200) NOT NULL default '',
path varchar(100) NOT NULL default '',
registered datetime NOT NULL default '0000-00-00 00:00:00',
last_updated datetime NOT NULL default '0000-00-00 00:00:00',
public tinyint(2) NOT NULL default '1',
archived tinyint(2) NOT NULL default '0',
mature tinyint(2) NOT NULL default '0',
spam tinyint(2) NOT NULL default '0',
deleted tinyint(2) NOT NULL default '0',
lang_id int(11) NOT NULL default '0',
PRIMARY KEY (blog_id),
KEY domain (domain(50),path(5)),
KEY lang_id (lang_id)
) ENGINE=InnoDB DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
INSERT INTO wp_blogs (domain, path) VALUES
('domain.no', '/fondsinvesteringer/'), ('domain.no', '/'),
('foo', 'bar'), ('bar', 'foo'), ('foo', 'foo'), ('bar', 'bar'),
('foo', 'foobar'), ('bar', 'foobar'), ('foobar', 'foobar');
SET GLOBAL innodb_prefix_index_cluster_optimization=off;
SELECT blog_id FROM wp_blogs WHERE domain IN ('domain.no')
AND path IN ( '/fondsinvesteringer/', '/' );
SET GLOBAL innodb_prefix_index_cluster_optimization=on;
SELECT blog_id FROM wp_blogs WHERE domain IN ('domain.no')
AND path IN ( '/fondsinvesteringer/', '/' );
DROP TABLE wp_blogs;
SET GLOBAL innodb_prefix_index_cluster_optimization = @save_opt;

5
mysql-test/t/innodb_ext_key.combinations Normal file
View file

@ -0,0 +1,5 @@
[on]
optimizer_switch=extended_keys=on
[off]
optimizer_switch=extended_keys=off

222
mysql-test/t/innodb_ext_key.test
View file

@ -1,9 +1,4 @@
--source include/have_innodb.inc
--disable_warnings
DROP TABLE IF EXISTS t1,t2,t3,t4;
DROP DATABASE IF EXISTS dbt3_s001;
--enable_warnings
--source include/innodb_prefix_index_cluster_optimization.inc
SET SESSION STORAGE_ENGINE='InnoDB';
@ -19,32 +14,12 @@ use dbt3_s001;
--enable_result_log
--enable_query_log
set @save_ext_key_optimizer_switch=@@optimizer_switch;
set optimizer_switch='extended_keys=off';
explain
select count(*) from lineitem where l_orderkey=130 and l_shipdate='1992-07-01';
flush status;
select count(*) from lineitem where l_orderkey=130 and l_shipdate='1992-07-01';
show status like 'handler_read%';
set optimizer_switch='extended_keys=on';
explain
select count(*) from lineitem where l_orderkey=130 and l_shipdate='1992-07-01';
flush status;
select count(*) from lineitem where l_orderkey=130 and l_shipdate='1992-07-01';
show status like 'handler_read%';
set optimizer_switch='extended_keys=off';
explain
select count(*) from lineitem
where l_orderkey=130 and l_linenumber=2 and l_shipdate='1992-07-01';
flush status;
select count(*) from lineitem
where l_orderkey=130 and l_linenumber=2 and l_shipdate='1992-07-01';
show status like 'handler_read%';
set optimizer_switch='extended_keys=on';
explain
select count(*) from lineitem
where l_orderkey=130 and l_linenumber=2 and l_shipdate='1992-07-01';
@ -53,7 +28,6 @@ select count(*) from lineitem
where l_orderkey=130 and l_linenumber=2 and l_shipdate='1992-07-01';
show status like 'handler_read%';
set optimizer_switch='extended_keys=off';
explain
select count(*) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000;
@ -62,16 +36,6 @@ select count(*) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000;
show status like 'handler_read%';
set optimizer_switch='extended_keys=on';
explain
select count(*) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000;
flush status;
select count(*) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000;
show status like 'handler_read%';
set optimizer_switch='extended_keys=off';
explain
select l_orderkey, l_linenumber from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
@ -80,30 +44,12 @@ select l_orderkey, l_linenumber from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
show status like 'handler_read%';
set optimizer_switch='extended_keys=on';
explain
select l_orderkey, l_linenumber from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
flush status;
select l_orderkey, l_linenumber from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
show status like 'handler_read%';
set optimizer_switch='extended_keys=off';
explain
select min(l_orderkey) from lineitem where l_shipdate='1992-07-01';
flush status;
select min(l_orderkey) from lineitem where l_shipdate='1992-07-01';
show status like 'handler_read%';
set optimizer_switch='extended_keys=on';
explain
select min(l_orderkey) from lineitem where l_shipdate='1992-07-01';
flush status;
select min(l_orderkey) from lineitem where l_shipdate='1992-07-01';
show status like 'handler_read%';
set optimizer_switch='extended_keys=off';
explain
select min(l_orderkey) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
@ -112,16 +58,6 @@ select min(l_orderkey) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
show status like 'handler_read%';
set optimizer_switch='extended_keys=on';
explain
select min(l_orderkey) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
flush status;
select min(l_orderkey) from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1001 and 2000;
show status like 'handler_read%';
set optimizer_switch='extended_keys=off';
explain
select max(l_linenumber) from lineitem
where l_shipdate='1992-07-01' and l_orderkey=130;
@ -130,16 +66,6 @@ select max(l_linenumber) from lineitem
where l_shipdate='1992-07-01' and l_orderkey=130;
show status like 'handler_read%';
set optimizer_switch='extended_keys=on';
explain
select max(l_linenumber) from lineitem
where l_shipdate='1992-07-01' and l_orderkey=130;
flush status;
select max(l_linenumber) from lineitem
where l_shipdate='1992-07-01' and l_orderkey=130;
show status like 'handler_read%';
set optimizer_switch='extended_keys=off';
explain
select l_orderkey, l_linenumber
from lineitem use index (i_l_shipdate, i_l_receiptdate)
@ -152,20 +78,6 @@ select l_orderkey, l_linenumber
or l_receiptdate='1992-07-01' and l_orderkey=5603;
show status like 'handler_read%';
set optimizer_switch='extended_keys=on';
explain
select l_orderkey, l_linenumber
from lineitem use index (i_l_shipdate, i_l_receiptdate)
where l_shipdate='1992-07-01' and l_orderkey=130
or l_receiptdate='1992-07-01' and l_orderkey=5603;
flush status;
select l_orderkey, l_linenumber
from lineitem use index (i_l_shipdate, i_l_receiptdate)
where l_shipdate='1992-07-01' and l_orderkey=130
or l_receiptdate='1992-07-01' and l_orderkey=5603;
show status like 'handler_read%';
set optimizer_switch='extended_keys=off';
explain
select l_orderkey, l_linenumber
from lineitem use index (i_l_shipdate, i_l_receiptdate)
@ -178,20 +90,6 @@ select l_orderkey, l_linenumber
or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
show status like 'handler_read%';
set optimizer_switch='extended_keys=on';
explain
select l_orderkey, l_linenumber
from lineitem use index (i_l_shipdate, i_l_receiptdate)
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
flush status;
select l_orderkey, l_linenumber
from lineitem use index (i_l_shipdate, i_l_receiptdate)
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
show status like 'handler_read%';
set optimizer_switch='extended_keys=off';
explain
select l_orderkey, l_linenumber from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
@ -202,18 +100,6 @@ select l_orderkey, l_linenumber from lineitem
or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
show status like 'handler_read%';
set optimizer_switch='extended_keys=on';
explain
select l_orderkey, l_linenumber from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
flush status;
select l_orderkey, l_linenumber from lineitem
where l_shipdate='1992-07-01' and l_orderkey between 1 and 1000
or l_receiptdate='1992-07-01' and l_orderkey between 5001 and 6000;
show status like 'handler_read%';
set optimizer_switch='extended_keys=off';
--replace_column 9 #
explain
select max(l_orderkey) from lineitem
@ -223,27 +109,6 @@ select max(l_orderkey) from lineitem
where l_partkey between 1 and 10 group by l_partkey;
show status like 'handler_read%';
set optimizer_switch='extended_keys=on';
--replace_column 9 #
explain
select max(l_orderkey) from lineitem
where l_partkey between 1 and 10 group by l_partkey;
flush status;
select max(l_orderkey) from lineitem
where l_partkey between 1 and 10 group by l_partkey;
show status like 'handler_read%';
set optimizer_switch='extended_keys=off';
--replace_column 9 #
explain
select max(l_orderkey) from lineitem
where l_suppkey in (1,4) group by l_suppkey;
flush status;
select max(l_orderkey) from lineitem
where l_suppkey in (1,4) group by l_suppkey;
show status like 'handler_read%';
set optimizer_switch='extended_keys=on';
--replace_column 9 #
explain
select max(l_orderkey) from lineitem
@ -255,23 +120,6 @@ show status like 'handler_read%';
create index i_p_retailprice on part(p_retailprice);
set optimizer_switch='extended_keys=off';
--replace_column 9 #
explain
select o_orderkey, p_partkey
from part use index (i_p_retailprice),
lineitem use index (i_l_partkey), orders
where p_retailprice > 1100 and o_orderdate='1997-01-01'
and o_orderkey=l_orderkey and p_partkey=l_partkey;
flush status;
select o_orderkey, p_partkey
from part use index (i_p_retailprice),
lineitem use index (i_l_partkey), orders
where p_retailprice > 1100 and o_orderdate='1997-01-01'
and o_orderkey=l_orderkey and p_partkey=l_partkey;
show status like 'handler_read%';
set optimizer_switch='extended_keys=on';
--replace_column 9 #
explain
select o_orderkey, p_partkey
@ -296,8 +144,6 @@ create table t0 (a int);
insert into t0 values (1), (2), (3), (4), (5);
create index i_p_size on part(p_size);
set optimizer_switch='extended_keys=on';
explain
select * from t0, part ignore index (primary)
where p_partkey=t0.a and p_size=1;
@ -320,7 +166,6 @@ use test;
set @save_optimizer_switch=@@optimizer_switch;
SET optimizer_switch='materialization=on,semijoin=on';
SET optimizer_switch='extended_keys=on';
CREATE TABLE t1 (a int, b int) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1,1), (2,2);
@ -339,10 +184,7 @@ set optimizer_switch=@save_optimizer_switch;
--echo # (valgrinf complains fixed by the patch for bug #914560)
--echo #
set @save_optimizer_switch=@@optimizer_switch;
SET optimizer_switch = 'derived_with_keys=on';
SET optimizer_switch = 'extended_keys=on';
CREATE TABLE t1 (a varchar(1)) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('j'), ('v');
@ -382,24 +224,12 @@ INSERT INTO t2 VALUES
(10), (11), (12), (13), (14),
(15), (16), (17), (18), (19), (24);
set @save_optimizer_switch=@@optimizer_switch;
SET optimizer_switch = 'extended_keys=off';
EXPLAIN
SELECT a FROM t1 AS t, t2
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
SELECT a FROM t1 AS t, t2
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
SET optimizer_switch = 'extended_keys=on';
EXPLAIN
SELECT a FROM t1 AS t, t2
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
SELECT a FROM t1 AS t, t2
WHERE c = a AND b IN (SELECT b FROM t1, t2 WHERE b = t.b);
set optimizer_switch=@save_optimizer_switch;
DROP TABLE t1,t2;
--echo #
@ -413,13 +243,11 @@ CREATE TABLE t2 (b int) ENGINE=MyISAM;
INSERT INTO t1 (a) VALUES (4), (6);
INSERT INTO t2 (b) VALUES (0), (8);
set @save_optimizer_switch=@@optimizer_switch;
set @save_join_cache_level=@@join_cache_level;
SET join_cache_level=3;
SET optimizer_switch='join_cache_hashed=on';
SET optimizer_switch='join_cache_bka=on';
SET optimizer_switch='extended_keys=on';
EXPLAIN
SELECT * FROM t1, t2 WHERE b=a;
@ -448,24 +276,11 @@ KEY c4 (c4)
) ENGINE=InnoDB AUTO_INCREMENT=5 DEFAULT CHARSET=utf8;
set @save_optimizer_switch=@@optimizer_switch;
set session optimizer_switch='extended_keys=off';
INSERT INTO t1 (c2, c3, c4) VALUES (58291525, 2580, 'foobar')
ON DUPLICATE KEY UPDATE c4 = VALUES(c4);
INSERT INTO t1 (c2, c3, c4) VALUES (58291525, 2580, 'foobar')
ON DUPLICATE KEY UPDATE c4 = VALUES(c4);
DELETE FROM t1;
set session optimizer_switch='extended_keys=on';
INSERT INTO t1 (c2, c3, c4) VALUES (58291525, 2580, 'foobar')
ON DUPLICATE KEY UPDATE c4 = VALUES(c4);
INSERT INTO t1 (c2, c3, c4) VALUES (58291525, 2580, 'foobar')
ON DUPLICATE KEY UPDATE c4 = VALUES(c4);
set optimizer_switch=@save_optimizer_switch;
DROP TABLE t1;
--echo #
@ -474,8 +289,6 @@ DROP TABLE t1;
--echo # (performance regression introduced in the patch for mdev-3851)
--echo #
set @save_optimizer_switch=@@optimizer_switch;
create table t1 (a int not null) engine=innodb;
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
@ -489,14 +302,6 @@ select
A.a + 10 * B.a, A.a + 10 * B.a, A.a + 10 * B.a
from t1 A, t1 B;
set optimizer_switch='extended_keys=off';
explain
select * from t1, t2 where t2.a=t1.a and t2.b < 2;
flush status;
select * from t1, t2 where t2.a=t1.a and t2.b < 2;
show status like 'handler_read%';
set optimizer_switch='extended_keys=on';
explain
select * from t1, t2 where t2.a=t1.a and t2.b < 2;
flush status;
@ -522,15 +327,6 @@ alter table t3 add primary key (pk1, pk2);
alter table t3 add key (col1, col2);
analyze table t1,t3;
set optimizer_switch='extended_keys=off';
--replace_column 9 #
explain
select * from t1, t3 where t3.col1=t1.a and t3.col2=t1.a;
--replace_column 9 #
explain
select * from t1, t3 where t3.col1=t1.a and t3.col2=t1.a and t3.pk1=t1.a;
set optimizer_switch='extended_keys=on';
--replace_column 9 #
explain
select * from t1, t3 where t3.col1=t1.a and t3.col2=t1.a;
@ -544,8 +340,6 @@ drop table t1,t2,t3;
--echo # Bug mdev-4340: performance regression with extended_keys=on
--echo #
set @save_optimizer_switch=@@optimizer_switch;
CREATE TABLE t1 (
page_id int(8) unsigned NOT NULL AUTO_INCREMENT,
page_namespace int(11) NOT NULL DEFAULT '0',
@ -649,13 +443,6 @@ INSERT INTO t3 VALUES
(97,'text-6009',''),(98,'text-7009',''),(99,'text-8009',''),(100,'text-9009','');
set optimizer_switch='extended_keys=off';
EXPLAIN
SELECT * FROM t1, t2 IGNORE INDEX (PRIMARY), t3
WHERE page_id=rev_page AND rev_text_id=old_id AND page_namespace=4 AND page_title='Sandbox'
ORDER BY rev_timestamp ASC LIMIT 10;
set optimizer_switch='extended_keys=on';
EXPLAIN
SELECT * FROM t1, t2 IGNORE INDEX (PRIMARY), t3
WHERE page_id=rev_page AND rev_text_id=old_id AND page_namespace=4 AND page_title='Sandbox'
@ -674,14 +461,10 @@ create table t2 (a bigint not null unique auto_increment, b varchar(10), primary
insert into t1 (b) values (null), (null), (null);
insert into t2 (b) values (null), (null), (null);
set optimizer_switch='extended_keys=on';
explain select a from t1 where b is null order by a desc limit 2;
select a from t1 where b is null order by a desc limit 2;
explain select a from t2 where b is null order by a desc limit 2;
select a from t2 where b is null order by a desc limit 2;
set optimizer_switch='extended_keys=off';
explain select a from t2 where b is null order by a desc limit 2;
select a from t2 where b is null order by a desc limit 2;
explain select a from t2 where b is null order by a desc;
select a from t2 where b is null order by a desc;
@ -691,8 +474,6 @@ select a from t2 where b is null order by a desc,a,a;
drop table t1, t2;
set optimizer_switch=@save_optimizer_switch;
--echo #
--echo # MDEV-10325: Queries examines all rows of a tables when it should not
--echo #
@ -828,7 +609,6 @@ explain format= json
select * from t1 force index(k1) where f2 <= 5 and pk2 <=5 and pk1 = 'abc' and f1 <= '3';
drop table t1;
set optimizer_switch=@save_ext_key_optimizer_switch;
set global innodb_file_format = @save_innodb_file_format;
set global innodb_large_prefix = @save_innodb_large_prefix;
SET SESSION STORAGE_ENGINE=DEFAULT;

31
storage/innobase/row/row0sel.cc
View file

@ -2,7 +2,7 @@
Copyright (c) 1997, 2017, Oracle and/or its affiliates. All Rights Reserved.
Copyright (c) 2008, Google Inc.
Copyright (c) 2015, 2018, MariaDB Corporation.
Copyright (c) 2015, 2020, MariaDB Corporation.
Portions of this file contain modifications contributed and copyrighted by
Google, Inc. Those modifications are gratefully acknowledged and are described
@ -3723,9 +3723,16 @@ bool row_search_with_covering_prefix(
return false;
}
/* We can avoid a clustered index lookup if
all of the following hold:
(1) all columns are in the secondary index
(2) all values for columns that are prefix-only
indexes are shorter than the prefix size
This optimization can avoid many IOs for certain schemas. */
for (ulint i = 0; i < prebuilt->n_template; i++) {
mysql_row_templ_t* templ = prebuilt->mysql_template + i;
ulint j = templ->rec_prefix_field_no;
ut_ad(!templ->mbminlen == !templ->mbmaxlen);
/** Condition (1) : is the field in the index. */
if (j == ULINT_UNDEFINED) {
@ -3735,33 +3742,29 @@ bool row_search_with_covering_prefix(
/** Condition (2): If this is a prefix index then
row's value size shorter than prefix length. */
if (!templ->rec_field_is_prefix) {
if (!templ->rec_field_is_prefix
|| rec_offs_nth_sql_null(offsets, j)) {
continue;
}
ulint rec_size = rec_offs_nth_size(offsets, j);
const dict_field_t* field = dict_index_get_nth_field(index, j);
ulint max_chars = field->prefix_len / templ->mbmaxlen;
ut_a(field->prefix_len > 0);
if (rec_size < max_chars) {
/* Record in bytes shorter than the index
prefix length in char. */
if (!field->prefix_len) {
continue;
}
if (rec_size * templ->mbminlen >= field->prefix_len) {
const ulint rec_size = rec_offs_nth_size(offsets, j);
if (rec_size >= field->prefix_len) {
/* Shortest representation string by the
byte length of the record is longer than the
maximum possible index prefix. */
return false;
}
size_t num_chars = rec_field_len_in_chars(
field->col, j, rec, offsets);
if (num_chars >= max_chars) {
if (templ->mbminlen != templ->mbmaxlen
&& rec_field_len_in_chars(field->col, j, rec, offsets)
>= field->prefix_len / templ->mbmaxlen) {
/* No of chars to store the record exceeds
the index prefix character length. */
return false;

32
storage/xtradb/row/row0sel.cc
View file

@ -2,7 +2,7 @@
Copyright (c) 1997, 2017, Oracle and/or its affiliates. All Rights Reserved.
Copyright (c) 2008, Google Inc.
Copyright (c) 2015, 2018, MariaDB Corporation.
Copyright (c) 2015, 2020, MariaDB Corporation.
Portions of this file contain modifications contributed and copyrighted by
Google, Inc. Those modifications are gratefully acknowledged and are described
@ -3740,9 +3740,16 @@ bool row_search_with_covering_prefix(
return false;
}
/* We can avoid a clustered index lookup if
all of the following hold:
(1) all columns are in the secondary index
(2) all values for columns that are prefix-only
indexes are shorter than the prefix size
This optimization can avoid many IOs for certain schemas. */
for (ulint i = 0; i < prebuilt->n_template; i++) {
mysql_row_templ_t* templ = prebuilt->mysql_template + i;
ulint j = templ->rec_prefix_field_no;
ut_ad(!templ->mbminlen == !templ->mbmaxlen);
/** Condition (1) : is the field in the index. */
if (j == ULINT_UNDEFINED) {
@ -3752,34 +3759,29 @@ bool row_search_with_covering_prefix(
/** Condition (2): If this is a prefix index then
row's value size shorter than prefix length. */
if (!templ->rec_field_is_prefix) {
if (!templ->rec_field_is_prefix
|| rec_offs_nth_sql_null(offsets, j)) {
continue;
}
ulint rec_size = rec_offs_nth_size(offsets, j);
const dict_field_t* field = dict_index_get_nth_field(index, j);
ulint max_chars = field->prefix_len / templ->mbmaxlen;
ut_a(field->prefix_len > 0);
if (rec_size < max_chars) {
/* Record in bytes shorter than the index
prefix length in char. */
if (!field->prefix_len) {
continue;
}
if (rec_size * templ->mbminlen >= field->prefix_len) {
const ulint rec_size = rec_offs_nth_size(offsets, j);
if (rec_size >= field->prefix_len) {
/* Shortest representation string by the
byte length of the record is longer than the
maximum possible index prefix. */
return false;
}
size_t num_chars = rec_field_len_in_chars(
field->col, j, rec, offsets);
if (num_chars >= max_chars) {
if (templ->mbminlen != templ->mbmaxlen
&& rec_field_len_in_chars(field->col, j, rec, offsets)
>= field->prefix_len / templ->mbmaxlen) {
/* No of chars to store the record exceeds
the index prefix character length. */
return false;