mirror of
https://github.com/MariaDB/server.git
synced 2025-05-11 13:21:44 +03:00
bd305d6b21
This bug is a regression bug. The regression was introduced by the patch for mdev-3851, that tried to weaken the condition when a ref access with an extended key can be converted to an eq_ref access. The patch incorrectly formed this condition. As a result, while improving performance for some queries, the patch caused worse performance for another queries.
871 lines
29 KiB
Plaintext
871 lines
29 KiB
Plaintext
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_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
|
|
1 SIMPLE lineitem ref PRIMARY,i_l_shipdate,i_l_orderkey,i_l_orderkey_quantity i_l_shipdate 8 const,const 1 Using index
|
|
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 1
|
|
Handler_read_prev 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_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';
|
|
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_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_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;
|
|
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
|
|
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 1
|
|
Handler_read_prev 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_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;
|
|
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
|
|
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 3
|
|
Handler_read_prev 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_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
|
|
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Select tables optimized away
|
|
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 0
|
|
Handler_read_prev 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_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;
|
|
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
|
|
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 0
|
|
Handler_read_prev 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_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;
|
|
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
|
|
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 0
|
|
Handler_read_prev 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_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)
|
|
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 sort_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 2
|
|
Handler_read_prev 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_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)
|
|
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
|
|
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 3
|
|
Handler_read_prev 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_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
|
|
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
|
|
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 3
|
|
Handler_read_prev 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_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;
|
|
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
|
|
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 21
|
|
Handler_read_last 1
|
|
Handler_read_next 0
|
|
Handler_read_prev 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_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;
|
|
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
|
|
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 6
|
|
Handler_read_last 1
|
|
Handler_read_next 0
|
|
Handler_read_prev 0
|
|
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_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),
|
|
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 9 dbt3_s001.part.p_partkey,dbt3_s001.orders.o_orderkey # 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 3
|
|
Handler_read_prev 0
|
|
Handler_read_rnd 0
|
|
Handler_read_rnd_deleted 0
|
|
Handler_read_rnd_next 0
|
|
#
|
|
# Bug mdev-3851: ref access used instead of expected eq_ref access
|
|
# when extended_keys=on
|
|
#
|
|
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;
|
|
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
|
|
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
|
|
2 2 blush rosy metallic lemon navajo Manufacturer#1 Brand#13 LARGE BRUSHED BRASS 1 LG CASE 902 final platelets hang f
|
|
drop table t0;
|
|
drop index i_p_size on part;
|
|
DROP DATABASE dbt3_s001;
|
|
use test;
|
|
#
|
|
# LP Bug #914560: query containing IN subquery
|
|
# + extended_keys = on
|
|
#
|
|
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);
|
|
a b
|
|
1 1
|
|
2 2
|
|
EXPLAIN
|
|
SELECT * FROM t1 WHERE 2 IN (SELECT MAX(s1.a) FROM t1 AS s1, t1 AS s2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <subquery2> const distinct_key distinct_key 4 const 1
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join)
|
|
2 MATERIALIZED s1 ALL NULL NULL NULL NULL 2
|
|
2 MATERIALIZED s2 ALL NULL NULL NULL NULL 2 Using join buffer (flat, BNL join)
|
|
DROP TABLE t1;
|
|
set optimizer_switch=@save_optimizer_switch;
|
|
#
|
|
# LP Bug #915291: query using a materialized view
|
|
# + 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;
|
|
INSERT INTO t2 VALUES ('j'), ('v');
|
|
CREATE TABLE t3 (c varchar(1));
|
|
INSERT INTO t2 VALUES ('m'), ('n');
|
|
CREATE VIEW v
|
|
AS SELECT DISTINCT * FROM t2 STRAIGHT_JOIN t3;
|
|
SELECT * FROM t1, v WHERE a = b;
|
|
a b c
|
|
DROP VIEW v;
|
|
DROP TABLE t1,t2,t3;
|
|
set optimizer_switch=@save_optimizer_switch;
|
|
#
|
|
# LP Bug #921167: query containing IN subquery
|
|
# + extended_keys = on
|
|
#
|
|
CREATE TABLE t1 (
|
|
a int NOT NULL, b varchar(1) NOT NULL, KEY(a), KEY(b,a)
|
|
) ENGINE=MyISAM;
|
|
INSERT INTO t1 VALUES
|
|
(0,'j'), (8,'v'), (1,'c'), (8,'m'), (9,'d'),
|
|
(24,'d'), (6,'y'), (1,'t'), (6,'d'), (2,'s');
|
|
CREATE TABLE t2 (
|
|
c int NOT NULL PRIMARY KEY
|
|
) ENGINE=MyISAM;
|
|
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);
|
|
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 = '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
|
|
#
|
|
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
|
|
1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where
|
|
1 SIMPLE t2 hash_ALL NULL #hash#$hj 5 test.t1.a 2 Using where; Using join buffer (flat, BNLH join)
|
|
SELECT * FROM t1, t2 WHERE b=a;
|
|
a b
|
|
set join_cache_level=@save_join_cache_level;
|
|
set optimizer_switch=@save_optimizer_switch;
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# Bug mdev-3888: INSERT with UPDATE on duplicate keys
|
|
# with extended_keys=on
|
|
#
|
|
CREATE TABLE t1 (
|
|
c1 bigint(20) unsigned NOT NULL AUTO_INCREMENT,
|
|
c2 bigint(20) unsigned NOT NULL,
|
|
c3 bigint(20) unsigned NOT NULL,
|
|
c4 varchar(128) DEFAULT NULL,
|
|
PRIMARY KEY (c1),
|
|
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 (
|
|
pk int primary key, a int not null, b int, unique(a)
|
|
)engine=innodb;
|
|
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_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
|
|
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_rnd 0
|
|
Handler_read_rnd_deleted 0
|
|
Handler_read_rnd_next 11
|
|
drop table t1,t2;
|
|
create table t1(a int) engine=myisam;
|
|
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t2(a int) engine=myisam;
|
|
insert into t2 select A.a + 10*B.a + 100*C.a from t1 A, t1 B, t1 C;
|
|
create table t3 (
|
|
pk1 int not null, pk2 int not null, col1 int not null, col2 int not null)
|
|
engine=innodb;
|
|
insert into t3 select a,a,a,a from t2;
|
|
alter table t3 add primary key (pk1, pk2);
|
|
alter table t3 add key (col1, col2);
|
|
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 PRIMARY 4 test.t1.a # Using where
|
|
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
|
|
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 12 test.t1.a,test.t1.a,test.t1.a # Using index
|
|
drop table t1,t2,t3;
|
|
set optimizer_switch=@save_optimizer_switch;
|
|
set optimizer_switch=@save_ext_key_optimizer_switch;
|
|
SET SESSION STORAGE_ENGINE=DEFAULT;
|