mirror of
https://github.com/MariaDB/server.git
synced 2025-01-16 03:52:35 +01:00
9608773f75
This essentially reverts commit 4e89ec6692
and only disables InnoDB persistent statistics for tests where it is
desirable. By design, InnoDB persistent statistics will not be updated
except by ANALYZE TABLE or by STATS_AUTO_RECALC.
The internal transactions that update persistent InnoDB statistics
in background tasks (with innodb_stats_auto_recalc=ON) may cause
nondeterministic query plans or interfere with some tests that deal
with other InnoDB internals, such as the purge of transaction history.
460 lines
12 KiB
Text
460 lines
12 KiB
Text
SET @save_opt= @@GLOBAL.innodb_prefix_index_cluster_optimization;
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set global innodb_prefix_index_cluster_optimization = ON;
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show variables like 'innodb_prefix_index_cluster_optimization';
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Variable_name Value
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innodb_prefix_index_cluster_optimization ON
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SET @save_innodb_stats_persistent=@@GLOBAL.innodb_stats_persistent;
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SET GLOBAL innodb_stats_persistent = OFF;
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# Create a table with a large varchar field that we index the prefix
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# of and ensure we only trigger cluster lookups when we expect it.
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create table prefixinno (
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id int not null,
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fake_id int not null,
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bigfield varchar(4096),
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primary key(id),
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index bigfield_idx (bigfield(32)),
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index fake_id_bigfield_prefix (fake_id, bigfield(32))
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) engine=innodb;
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insert into prefixinno values (1, 1001, repeat('a', 1)),
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(8, 1008, repeat('b', 8)),
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(24, 1024, repeat('c', 24)),
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(31, 1031, repeat('d', 31)),
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(32, 1032, repeat('x', 32)),
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(33, 1033, repeat('y', 33)),
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(128, 1128, repeat('z', 128));
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select * from prefixinno;
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id fake_id bigfield
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1 1001 a
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8 1008 bbbbbbbb
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24 1024 cccccccccccccccccccccccc
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31 1031 ddddddddddddddddddddddddddddddd
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32 1032 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
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33 1033 yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
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128 1128 zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
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# Baseline sanity check: 0, 0.
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select "no-op query";
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no-op query
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no-op query
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Eligible for optimization.
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select id, bigfield from prefixinno where bigfield = repeat('d', 31);
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id bigfield
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31 ddddddddddddddddddddddddddddddd
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Eligible for optimization, access via fake_id only.
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select id, bigfield from prefixinno where fake_id = 1031;
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id bigfield
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31 ddddddddddddddddddddddddddddddd
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Not eligible for optimization, access via fake_id of big row.
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select id, bigfield from prefixinno where fake_id = 1033;
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id bigfield
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33 yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Not eligible for optimization.
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select id, bigfield from prefixinno where bigfield = repeat('x', 32);
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id bigfield
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32 xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Not eligible for optimization.
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select id, bigfield from prefixinno where bigfield = repeat('y', 33);
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id bigfield
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33 yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Eligible, should not increment lookup counter.
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select id, bigfield from prefixinno where bigfield = repeat('b', 8);
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id bigfield
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8 bbbbbbbb
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Eligible, should not increment lookup counter.
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select id, bigfield from prefixinno where bigfield = repeat('c', 24);
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id bigfield
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24 cccccccccccccccccccccccc
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Should increment lookup counter.
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select id, bigfield from prefixinno where bigfield = repeat('z', 128);
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id bigfield
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128 zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Disable optimization, confirm we still increment counter.
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set global innodb_prefix_index_cluster_optimization = OFF;
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select id, bigfield from prefixinno where fake_id = 1033;
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id bigfield
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33 yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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drop table prefixinno;
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# Multi-byte handling case
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set global innodb_prefix_index_cluster_optimization = ON;
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SET NAMES utf8mb4;
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CREATE TABLE t1(
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f1 varchar(10) CHARACTER SET UTF8MB4 COLLATE UTF8MB4_BIN,
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INDEX (f1(3)))ENGINE=INNODB;
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INSERT INTO t1 VALUES('a'), ('cccc'), ('až'), ('cčc'), ('ggᵷg'), ('¢¢');
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INSERT INTO t1 VALUES('தமிழ்'), ('🐱🌑'), ('🌒'), ('🌑');
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INSERT INTO t1 VALUES('😊me'), ('eu€'), ('ls¢');
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# Eligible - record length is shorter than prefix
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'a';
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f1
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a
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like 'c%';
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f1
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cccc
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cčc
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select @cluster_lookups;
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@cluster_lookups
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3
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Eligible - record length shorter than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'až';
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f1
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až
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'தமிழ்';
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f1
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தமிழ்
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like 'ggᵷ%';
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f1
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ggᵷg
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '😊%';
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f1
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😊me
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'ls¢';
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f1
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ls¢
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Eligible - record length shorter than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '¢¢%';
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f1
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¢¢
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Eligible - record length shorter than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🐱🌑%';
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f1
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🐱🌑
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🌑%';
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f1
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🌑
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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2
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🌒%';
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f1
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🌒
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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2
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DROP TABLE t1;
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# Multi-byte with minimum character length > 1 bytes
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CREATE TABLE t1(
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f1 varchar(10) CHARACTER SET UTF16 COLLATE UTF16_BIN,
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INDEX (f1(3)))ENGINE=INNODB;
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INSERT INTO t1 VALUES('a'), ('cccc'), ('až'), ('cčc'), ('ggᵷg'), ('¢¢');
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INSERT INTO t1 VALUES('தமிழ்'), ('🐱🌑'), ('🌒'), ('🌑');
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INSERT INTO t1 VALUES('😊me'), ('eu€'), ('ls¢');
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# Eligible - record length is shorter than prefix
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'a';
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f1
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a
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like 'c%';
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f1
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cccc
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cčc
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select @cluster_lookups;
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@cluster_lookups
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3
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Eligible - record length shorter than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'až';
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f1
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až
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'தமிழ்';
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f1
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தமிழ்
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like 'ggᵷ%';
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f1
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ggᵷg
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select @cluster_lookups;
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@cluster_lookups
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2
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '😊%';
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f1
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😊me
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Not eligible - record length longer than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 = 'ls¢';
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f1
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ls¢
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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# Eligible - record length shorter than prefix length
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SELECT f1 FROM t1 FORCE INDEX(`f1`) WHERE f1 like '¢¢%';
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f1
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¢¢
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Eligible - record length shorter than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🐱🌑%';
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f1
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🐱🌑
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select @cluster_lookups;
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@cluster_lookups
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1
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Eligible - record length is shorter than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🌑%';
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f1
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🌑
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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2
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# Eligible - record length is shorter than prefix length
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SELECT f1 FROM t1 FORCE INDEX (`f1`) WHERE f1 like '🌒%';
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f1
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🌒
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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2
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DROP TABLE t1;
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CREATE TABLE t1(
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col1 INT,
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col2 BLOB DEFAULT NULL,
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INDEX `idx1`(col2(4), col1))ENGINE=INNODB;
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INSERT INTO t1 VALUES (2, 'test'), (3, repeat('test1', 2000));
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INSERT INTO t1(col1) VALUES(1);
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# Eligible - record length is shorter than prefix length
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SELECT col1 FROM t1 FORCE INDEX (`idx1`) WHERE col2 is NULL;
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col1
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1
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select @cluster_lookups;
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@cluster_lookups
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0
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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1
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# Not eligible - record length longer than prefix index
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SELECT col1 FROM t1 FORCE INDEX (`idx1`) WHERE col2 like 'test1%';
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col1
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3
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select @cluster_lookups;
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@cluster_lookups
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2
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select @cluster_lookups_avoided;
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@cluster_lookups_avoided
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0
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DROP TABLE t1;
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#
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# MDEV-20464 Division by 0 in row_search_with_covering_prefix()
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#
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CREATE TABLE t1 (f1 INT, f2 INT AS (f1), f3 INT AS (f1), f4 INT AS (f1),
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KEY (f1,f2,f3)) ENGINE=InnoDB;
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INSERT INTO t1 (f1) VALUES (NULL),(0);
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SELECT f1, MAX(f3), COUNT(f4) FROM t1 GROUP BY f1;
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f1 MAX(f3) COUNT(f4)
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NULL NULL 0
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0 0 1
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DROP TABLE t1;
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#
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# MDEV-23600 Division by 0 in row_search_with_covering_prefix()
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#
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CREATE TABLE t(c POINT UNIQUE) ENGINE=InnoDB;
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INSERT t SET c=POINT(1,1);
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SELECT * FROM t WHERE c > (SELECT MAX(c) FROM t);
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c
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DROP TABLE t;
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#
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# MDEV-12486 Wrong results with innodb_prefix_index_cluster_optimization
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#
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CREATE TABLE wp_blogs (
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blog_id bigint(20) NOT NULL auto_increment,
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site_id bigint(20) NOT NULL default '0',
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domain varchar(200) NOT NULL default '',
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path varchar(100) NOT NULL default '',
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registered datetime NOT NULL default '0000-00-00 00:00:00',
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last_updated datetime NOT NULL default '0000-00-00 00:00:00',
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public tinyint(2) NOT NULL default '1',
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archived tinyint(2) NOT NULL default '0',
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mature tinyint(2) NOT NULL default '0',
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spam tinyint(2) NOT NULL default '0',
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deleted tinyint(2) NOT NULL default '0',
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lang_id int(11) NOT NULL default '0',
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PRIMARY KEY (blog_id),
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KEY domain (domain(50),path(5)),
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KEY lang_id (lang_id)
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) ENGINE=InnoDB DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;
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INSERT INTO wp_blogs (domain, path) VALUES
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('domain.no', '/fondsinvesteringer/'), ('domain.no', '/'),
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('foo', 'bar'), ('bar', 'foo'), ('foo', 'foo'), ('bar', 'bar'),
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('foo', 'foobar'), ('bar', 'foobar'), ('foobar', 'foobar');
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SET GLOBAL innodb_prefix_index_cluster_optimization=off;
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SELECT blog_id FROM wp_blogs WHERE domain IN ('domain.no')
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AND path IN ( '/fondsinvesteringer/', '/' );
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blog_id
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2
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1
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SET GLOBAL innodb_prefix_index_cluster_optimization=on;
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SELECT blog_id FROM wp_blogs WHERE domain IN ('domain.no')
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AND path IN ( '/fondsinvesteringer/', '/' );
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blog_id
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2
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1
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DROP TABLE wp_blogs;
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SET GLOBAL innodb_prefix_index_cluster_optimization = @save_opt;
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SET GLOBAL innodb_stats_persistent = @save_innodb_stats_persistent;
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