mirror of
https://github.com/MariaDB/server.git
synced 2025-10-23 16:17:30 +02:00
32940e3442
In 12.1, remove the FIX_DISK_TMPTABLE_COSTS flag from @@new_mode. The new behavior is now always on.
155 lines
4.9 KiB
Text
155 lines
4.9 KiB
Text
#
|
|
# Test of cost calculations. This test is using the Aria engine as the cost
|
|
# calculations are stable for it.
|
|
#
|
|
# This file also includes MDEV's that shows errors in cost calculation functions.
|
|
#
|
|
|
|
--source include/have_sequence.inc
|
|
--source include/have_innodb.inc
|
|
--source include/innodb_stable_estimates.inc
|
|
|
|
create table t1 (a int primary key, b int, c int, d int, e int, key ba (b,a), key bda (b,d,a), key cba (c,b,a), key cb (c,b), key d (d)) engine=aria;
|
|
insert into t1 select seq,seq,seq,seq,seq from seq_1_to_10;
|
|
insert into t1 values(20,2,2,2,2),(21,3,4,5,6);
|
|
|
|
--echo #
|
|
--echo # Get different scan costs
|
|
--echo #
|
|
|
|
explain select sum(e) as "table_scan" from t1;
|
|
--source include/last_query_cost.inc
|
|
explain select sum(a) as "index scan" from t1;
|
|
--source include/last_query_cost.inc
|
|
|
|
--echo #
|
|
--echo # Range scans should be used if we don't examine all rows in the table
|
|
--echo #
|
|
explain select count(a) from t1;
|
|
--source include/last_query_cost.inc
|
|
explain select count(*) from t1 where a > 0;
|
|
--source include/last_query_cost.inc
|
|
explain select count(*) from t1 where a > 1;
|
|
--source include/last_query_cost.inc
|
|
explain select count(*) from t1 where a > 2;
|
|
--source include/last_query_cost.inc
|
|
|
|
--echo #
|
|
--echo # Shorter indexes are preferred over longer indexes
|
|
--echo #
|
|
explain select sum(a+b) from t1;
|
|
--source include/last_query_cost.inc
|
|
explain select count(*) from t1 where b between 5 and 10;
|
|
--source include/last_query_cost.inc
|
|
explain select sum(b+c) from t1 where b between 5 and 6 and c between 5 and 6;
|
|
--source include/last_query_cost.inc
|
|
|
|
--echo # Cost of 'd' should be slightly smaller as key 'ba' is longer than 'd'
|
|
explain select count(*) from t1 where b > 6;
|
|
--source include/last_query_cost.inc
|
|
explain select count(*) from t1 where d > 6;
|
|
--source include/last_query_cost.inc
|
|
|
|
|
|
--echo #
|
|
--echo # Check covering index usage
|
|
--echo #
|
|
explain select a,b,c from t1 where a=b;
|
|
--source include/last_query_cost.inc
|
|
|
|
--echo #
|
|
--echo # Prefer ref keys over ranges
|
|
--echo #
|
|
|
|
explain select count(*) from t1 where b=2;
|
|
--source include/last_query_cost.inc
|
|
explain select count(*) from t1 where b=2 and c=2;
|
|
--source include/last_query_cost.inc
|
|
explain select count(*) from t1 where b=3 and c between 3 and 4;
|
|
--source include/last_query_cost.inc
|
|
|
|
--echo #
|
|
--echo # Prefer eq keys over ref keys
|
|
--echo #
|
|
|
|
explain select a,b,e from t1 where a=10 or a=11;
|
|
--source include/last_query_cost.inc
|
|
explain select a,b,e from t1 where d=10 or d=11;
|
|
--source include/last_query_cost.inc
|
|
|
|
drop table t1;
|
|
|
|
--echo #
|
|
--echo # MDEV-30328 Assertion `avg_io_cost != 0.0 || index_cost.io + row_cost.io == 0' failed in
|
|
--echo # Cost_estimate::total_cost()
|
|
--echo #
|
|
|
|
set @save=@@InnoDB.optimizer_disk_read_ratio;
|
|
set global InnoDB.optimizer_disk_read_ratio=0;
|
|
|
|
create table t1 (
|
|
`l_orderkey` int(11) NOT NULL,
|
|
`l_partkey` int(11) DEFAULT NULL,
|
|
`l_suppkey` int(11) DEFAULT NULL,
|
|
`l_linenumber` int(11) NOT NULL,
|
|
`l_extra` int(11) NOT NULL,
|
|
`l_quantity` double DEFAULT NULL,
|
|
`l_extendedprice` double DEFAULT NULL,
|
|
`l_discount` double DEFAULT NULL,
|
|
`l_tax` double DEFAULT NULL,
|
|
`l_returnflag` char(1) DEFAULT NULL,
|
|
`l_linestatus` char(1) DEFAULT NULL,
|
|
`l_shipDATE` date DEFAULT NULL,
|
|
`l_commitDATE` date DEFAULT NULL,
|
|
`l_receiptDATE` date DEFAULT NULL,
|
|
`l_shipinstruct` char(25) DEFAULT NULL,
|
|
`l_shipmode` char(10) DEFAULT NULL,
|
|
`l_comment` varchar(44) DEFAULT NULL,
|
|
PRIMARY KEY (`l_orderkey`),
|
|
UNIQUE (`l_linenumber`),
|
|
UNIQUE (`l_extra`) ,
|
|
KEY `l_suppkey` (l_suppkey, l_partkey),
|
|
KEY `long_suppkey` (l_partkey, l_suppkey, l_linenumber, l_extra) )
|
|
ENGINE= InnoDB;
|
|
explain select count(*) from test.t1 force index (l_suppkey) where l_suppkey >= 0 and l_partkey >=0;
|
|
drop table t1;
|
|
|
|
set global InnoDB.optimizer_disk_read_ratio=@save;
|
|
|
|
--echo #
|
|
--echo # MDEV-37723 In MDEV-36861, analyze Q4
|
|
--echo # Alter disk based tmp table lookup cost formula
|
|
--echo #
|
|
|
|
create table t1 (a int primary key,
|
|
b date, c char(15),
|
|
d blob,
|
|
key t1_ix1 (b)) ENGINE= InnoDB;
|
|
create table t2 (e int not null,
|
|
f int not null,
|
|
g date, h date,
|
|
primary key (e, f)) ENGINE= InnoDB;
|
|
--disable_warnings
|
|
insert into t1 select seq, date('1993-06-01') + interval seq second,
|
|
chr(65+mod(seq, 4)), NULL from seq_1_to_7000;
|
|
insert into t2 select a.seq, b.seq, date('1993-06-01') + interval b.seq day,
|
|
if (mod(a.seq,2), date('1993-06-01') + interval b.seq+1 day,
|
|
date('1993-06-01') - interval b.seq-1 day)
|
|
from seq_1_to_7000 a, seq_1_to_3 b;
|
|
|
|
set
|
|
@save_mhts= @@max_heap_table_size,
|
|
@@max_heap_table_size=16384;
|
|
|
|
|
|
--echo # This should use "t1, FirstMatch(t2)". Not "t1, SJ-Materialization(t2)".
|
|
explain format=json
|
|
select c, count(*) as dc
|
|
from t1
|
|
where
|
|
b >= date '1993-06-01' and b < date '1993-06-01' + interval '3' month and
|
|
exists (select * from t2 where e = t1.a and g < h)
|
|
group by c;
|
|
|
|
set max_heap_table_size=@save_mhts;
|
|
drop table t1, t2;
|