mirror of
https://github.com/MariaDB/server.git
synced 2025-01-31 11:01:52 +01:00
727491b72a
This includes all test changes from
"Changing all cost calculation to be given in milliseconds"
and forwards.
Some of the things that caused changes in the result files:
- As part of fixing tests, I added 'echo' to some comments to be able to
easier find out where things where wrong.
- MATERIALIZED has now a higher cost compared to X than before. Because
of this some MATERIALIZED types have changed to DEPENDEND SUBQUERY.
- Some test cases that required MATERIALIZED to repeat a bug was
changed by adding more rows to force MATERIALIZED to happen.
- 'Filtered' in SHOW EXPLAIN has in many case changed from 100.00 to
something smaller. This is because now filtered also takes into
account the smallest possible ref access and filters, even if they
where not used. Another reason for 'Filtered' being smaller is that
we now also take into account implicit filtering done for subqueries
using FIRSTMATCH.
(main.subselect_no_exists_to_in)
This is caluculated in best_access_path() and stored in records_out.
- Table orders has changed because more accurate costs.
- 'index' and 'ALL' for small tables has changed to use 'range' or
'ref' because of optimizer_scan_setup_cost.
- index can be changed to 'range' as 'range' optimizer assumes we don't
have to read the blocks from disk that range optimizer has already read.
This can be confusing in the case where there is no obvious where clause
but instead there is a hidden 'key_column > NULL' added by the optimizer.
(main.subselect_no_exists_to_in)
- Scan on primary clustered key does not report 'Using Index' anymore
(It's a table scan, not an index scan).
- For derived tables, the number of rows is now 100 instead of 2,
which can be seen in EXPLAIN.
- More tests have "Using index for group by" as the cost of this
optimization is now more correct (lower).
- A primary key could be preferred for a normal key, even if it would
access more rows, as it's faster to do 1 lokoup and 3 'index_next' on a
clustered primary key than one lookup trough a secondary.
(main.stat_tables_innodb)
Notes:
- There was a 4.7% more calls to best_extension_by_limited_search() in
the main.greedy_optimizer test. However examining the test results
it looked that the plans where slightly better (eq_ref where more
chained together) so I assume this is ok.
- I have verified a few test cases where there was notable/unexpected
changes in the plan and in all cases the new optimizer plans where
faster. (main.greedy_optimizer and some others)
313 lines
15 KiB
Text
313 lines
15 KiB
Text
set @innodb_stats_persistent_save= @@innodb_stats_persistent;
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set @innodb_stats_persistent_sample_pages_save=
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@@innodb_stats_persistent_sample_pages;
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set global innodb_stats_persistent= 1;
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set global innodb_stats_persistent_sample_pages=100;
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drop view if exists v1;
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drop table if exists t1,t4;
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create table t4 (
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pk_col int auto_increment primary key, a1 char(64), a2 char(64), b char(16), c char(16) not null, d char(16), dummy char(64) default ' '
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) engine=innodb;
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insert into t4 (a1, a2, b, c, d) values
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('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
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('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
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('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
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('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
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('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
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('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
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('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
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('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
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('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
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('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
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('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
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('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4'),
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('d','a','a','a411','xy1'),('d','a','a','b411','xy2'),('d','a','a','c411','xy3'),('d','a','a','d411','xy4'),
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('d','a','b','e412','xy1'),('d','a','b','f412','xy2'),('d','a','b','g412','xy3'),('d','a','b','h412','xy4'),
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('d','b','a','i421','xy1'),('d','b','a','j421','xy2'),('d','b','a','k421','xy3'),('d','b','a','l421','xy4'),
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('d','b','b','m422','xy1'),('d','b','b','n422','xy2'),('d','b','b','o422','xy3'),('d','b','b','p422','xy4'),
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('a','a','a','a111','xy1'),('a','a','a','b111','xy2'),('a','a','a','c111','xy3'),('a','a','a','d111','xy4'),
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('a','a','b','e112','xy1'),('a','a','b','f112','xy2'),('a','a','b','g112','xy3'),('a','a','b','h112','xy4'),
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('a','b','a','i121','xy1'),('a','b','a','j121','xy2'),('a','b','a','k121','xy3'),('a','b','a','l121','xy4'),
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('a','b','b','m122','xy1'),('a','b','b','n122','xy2'),('a','b','b','o122','xy3'),('a','b','b','p122','xy4'),
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('b','a','a','a211','xy1'),('b','a','a','b211','xy2'),('b','a','a','c211','xy3'),('b','a','a','d211','xy4'),
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('b','a','b','e212','xy1'),('b','a','b','f212','xy2'),('b','a','b','g212','xy3'),('b','a','b','h212','xy4'),
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('b','b','a','i221','xy1'),('b','b','a','j221','xy2'),('b','b','a','k221','xy3'),('b','b','a','l221','xy4'),
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('b','b','b','m222','xy1'),('b','b','b','n222','xy2'),('b','b','b','o222','xy3'),('b','b','b','p222','xy4'),
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('c','a','a','a311','xy1'),('c','a','a','b311','xy2'),('c','a','a','c311','xy3'),('c','a','a','d311','xy4'),
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('c','a','b','e312','xy1'),('c','a','b','f312','xy2'),('c','a','b','g312','xy3'),('c','a','b','h312','xy4'),
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('c','b','a','i321','xy1'),('c','b','a','j321','xy2'),('c','b','a','k321','xy3'),('c','b','a','l321','xy4'),
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('c','b','b','m322','xy1'),('c','b','b','n322','xy2'),('c','b','b','o322','xy3'),('c','b','b','p322','xy4'),
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('d','a','a','a411','xy1'),('d','a','a','b411','xy2'),('d','a','a','c411','xy3'),('d','a','a','d411','xy4'),
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('d','a','b','e412','xy1'),('d','a','b','f412','xy2'),('d','a','b','g412','xy3'),('d','a','b','h412','xy4'),
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('d','b','a','i421','xy1'),('d','b','a','j421','xy2'),('d','b','a','k421','xy3'),('d','b','a','l421','xy4'),
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('d','b','b','m422','xy1'),('d','b','b','n422','xy2'),('d','b','b','o422','xy3'),('d','b','b','p422','xy4');
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create index idx12672_0 on t4 (a1);
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create index idx12672_1 on t4 (a1,a2,b,c);
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create index idx12672_2 on t4 (a1,a2,b);
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analyze table t4;
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Table Op Msg_type Msg_text
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test.t4 analyze status Engine-independent statistics collected
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test.t4 analyze status OK
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select distinct a1 from t4 where pk_col not in (1,2,3,4);
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a1
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a
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b
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c
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d
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drop table t4;
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create table t1 (
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a varchar(30), b varchar(30), primary key(a), key(b)
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) engine=innodb;
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select distinct a from t1;
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a
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drop table t1;
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create table t1(a int, key(a)) engine=innodb;
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insert into t1 values(1);
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select a, count(a) from t1 group by a with rollup;
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a count(a)
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1 1
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NULL 1
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drop table t1;
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create table t1 (f1 int, f2 char(1), primary key(f1,f2)) engine=innodb;
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insert into t1 values ( 1,"e"),(2,"a"),( 3,"c"),(4,"d");
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alter table t1 drop primary key, add primary key (f2, f1);
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explain select distinct f1 a, f1 b from t1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using temporary
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explain select distinct f1, f2 from t1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 4
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drop table t1;
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create table t1(pk int primary key) engine=innodb;
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create view v1 as select pk from t1 where pk < 20;
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insert into t1 values (1), (2), (3), (4);
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select distinct pk from v1;
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pk
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1
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2
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3
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4
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insert into t1 values (5), (6), (7);
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select distinct pk from v1;
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pk
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1
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2
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3
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4
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5
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6
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7
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drop view v1;
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drop table t1;
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End of 5.1 tests
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#
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# Bug#12540545 61101: ASSERTION FAILURE IN THREAD 1256741184 IN
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# FILE /BUILDDIR/BUILD/BUILD/MYSQ
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#
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CREATE TABLE t1 (a CHAR(1), b CHAR(1), PRIMARY KEY (a,b)) ENGINE=InnoDB;
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INSERT INTO t1 VALUES ('a', 'b'), ('c', 'd');
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EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 WHERE b = 'b';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where
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SELECT COUNT(DISTINCT a) FROM t1 WHERE b = 'b';
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COUNT(DISTINCT a)
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1
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DROP TABLE t1;
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CREATE TABLE t1 (a CHAR(1) NOT NULL, b CHAR(1) NOT NULL, UNIQUE KEY (a,b))
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ENGINE=InnoDB;
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INSERT INTO t1 VALUES ('a', 'b'), ('c', 'd');
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EXPLAIN SELECT COUNT(DISTINCT a) FROM t1 WHERE b = 'b';
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 2 Using where
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SELECT COUNT(DISTINCT a) FROM t1 WHERE b = 'b';
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COUNT(DISTINCT a)
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1
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DROP TABLE t1;
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End of 5.5 tests
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#
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# Bug#17909656 - WRONG RESULTS FOR A SIMPLE QUERY WITH GROUP BY
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#
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CREATE TABLE t0 (
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i1 INTEGER NOT NULL
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);
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INSERT INTO t0 VALUES (1),(2),(3),(4),(5),(6),(7),(8),(9),(10),
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(11),(12),(13),(14),(15),(16),(17),(18),(19),(20),
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(21),(22),(23),(24),(25),(26),(27),(28),(29),(30);
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CREATE TABLE t1 (
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c1 CHAR(1) NOT NULL,
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i1 INTEGER NOT NULL,
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i2 INTEGER NOT NULL,
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UNIQUE KEY k1 (c1,i2)
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) ENGINE=InnoDB;
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INSERT INTO t1 SELECT 'A',i1,i1 FROM t0;
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INSERT INTO t1 SELECT 'B',i1,i1 FROM t0;
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INSERT INTO t1 SELECT 'C',i1,i1 FROM t0;
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INSERT INTO t1 SELECT 'D',i1,i1 FROM t0;
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INSERT INTO t1 SELECT 'E',i1,i1 FROM t0;
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INSERT INTO t1 SELECT 'F',i1,i1 FROM t0;
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CREATE TABLE t2 (
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c1 CHAR(1) NOT NULL,
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i1 INTEGER NOT NULL,
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i2 INTEGER NOT NULL,
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UNIQUE KEY k2 (c1,i1,i2)
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) ENGINE=InnoDB;
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INSERT INTO t2 SELECT 'A',i1,i1 FROM t0;
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INSERT INTO t2 SELECT 'B',i1,i1 FROM t0;
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INSERT INTO t2 SELECT 'C',i1,i1 FROM t0;
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INSERT INTO t2 SELECT 'D',i1,i1 FROM t0;
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INSERT INTO t2 SELECT 'E',i1,i1 FROM t0;
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INSERT INTO t2 SELECT 'F',i1,i1 FROM t0;
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ANALYZE TABLE t1;
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ANALYZE TABLE t2;
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EXPLAIN SELECT c1, max(i2) FROM t1 WHERE (c1 = 'C' AND i2 = 17) OR ( c1 = 'F')
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GROUP BY c1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range k1 k1 5 NULL 31 Using where
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SELECT c1, max(i2) FROM t1 WHERE (c1 = 'C' AND i2 = 17) OR ( c1 = 'F')
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GROUP BY c1;
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c1 max(i2)
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C 17
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F 30
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EXPLAIN SELECT c1, max(i2) FROM t1 WHERE (c1 = 'C' OR ( c1 = 'F' AND i2 = 17))
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GROUP BY c1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range k1 k1 5 NULL 31 Using where
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SELECT c1, max(i2) FROM t1 WHERE (c1 = 'C' OR ( c1 = 'F' AND i2 = 17))
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GROUP BY c1;
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c1 max(i2)
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C 30
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F 17
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EXPLAIN SELECT c1, max(i2) FROM t1 WHERE (c1 = 'C' OR c1 = 'F' ) AND ( i2 = 17 )
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GROUP BY c1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range k1 k1 5 NULL 2 Using where
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SELECT c1, max(i2) FROM t1 WHERE (c1 = 'C' OR c1 = 'F' ) AND ( i2 = 17 )
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GROUP BY c1;
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c1 max(i2)
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C 17
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F 17
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EXPLAIN SELECT c1, max(i2) FROM t1
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WHERE ((c1 = 'C' AND (i2 = 40 OR i2 = 30)) OR ( c1 = 'F' AND (i2 = 40 )))
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GROUP BY c1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range k1 k1 5 NULL 3 Using where
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SELECT c1, max(i2) FROM t1
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WHERE ((c1 = 'C' AND (i2 = 40 OR i2 = 30)) OR ( c1 = 'F' AND (i2 = 40 )))
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GROUP BY c1;
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c1 max(i2)
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C 30
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EXPLAIN SELECT c1, i1, max(i2) FROM t2
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WHERE (c1 = 'C' OR ( c1 = 'F' AND i1 < 35)) AND ( i2 = 17 )
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GROUP BY c1,i1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 range k2 k2 5 NULL 60 Using where
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SELECT c1, i1, max(i2) FROM t2
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WHERE (c1 = 'C' OR ( c1 = 'F' AND i1 < 35)) AND ( i2 = 17 )
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GROUP BY c1,i1;
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c1 i1 max(i2)
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C 17 17
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F 17 17
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EXPLAIN SELECT c1, i1, max(i2) FROM t2
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WHERE (((c1 = 'C' AND i1 < 40) OR ( c1 = 'F' AND i1 < 35)) AND ( i2 = 17 ))
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GROUP BY c1,i1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 range k2 k2 5 NULL 60 Using where
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SELECT c1, i1, max(i2) FROM t2
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WHERE (((c1 = 'C' AND i1 < 40) OR ( c1 = 'F' AND i1 < 35)) AND ( i2 = 17 ))
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GROUP BY c1,i1;
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c1 i1 max(i2)
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C 17 17
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F 17 17
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EXPLAIN SELECT c1, i1, max(i2) FROM t2
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WHERE ((c1 = 'C' AND i1 < 40) OR ( c1 = 'F' AND i1 < 35) OR ( i2 = 17 ))
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GROUP BY c1,i1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 index k2 k2 9 NULL 180 Using where
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SELECT c1, i1, max(i2) FROM t2
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WHERE ((c1 = 'C' AND i1 < 40) OR ( c1 = 'F' AND i1 < 35) OR ( i2 = 17 ))
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GROUP BY c1,i1;
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c1 i1 max(i2)
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A 17 17
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B 17 17
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C 1 1
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C 2 2
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C 3 3
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C 4 4
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C 5 5
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C 6 6
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C 7 7
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C 8 8
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C 9 9
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C 10 10
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C 11 11
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C 12 12
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C 13 13
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C 14 14
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C 15 15
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C 16 16
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C 17 17
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C 18 18
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C 19 19
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C 20 20
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C 21 21
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C 22 22
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C 23 23
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C 24 24
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C 25 25
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C 26 26
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C 27 27
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C 28 28
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C 29 29
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C 30 30
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D 17 17
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E 17 17
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F 1 1
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F 2 2
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F 3 3
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F 4 4
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F 5 5
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F 6 6
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F 7 7
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F 8 8
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F 9 9
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F 10 10
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F 11 11
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F 12 12
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F 13 13
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F 14 14
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F 15 15
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F 16 16
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F 17 17
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F 18 18
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F 19 19
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F 20 20
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F 21 21
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F 22 22
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F 23 23
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F 24 24
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F 25 25
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F 26 26
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F 27 27
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F 28 28
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F 29 29
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F 30 30
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DROP TABLE t0,t1,t2;
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#
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# MDEV-MariaDB daemon leaks memory with specific query
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#
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CREATE TABLE t1 (`voter_id` int(11) unsigned NOT NULL,
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`language_id` int(11) unsigned NOT NULL DEFAULT '1'
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) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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CREATE TABLE t2 (`voter_id` int(10) unsigned NOT NULL DEFAULT '0',
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`serialized_c` mediumblob) ENGINE=InnoDB DEFAULT CHARSET=utf8;
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insert into t2 values (1,repeat("a",1000)),(2,repeat("a",1000)),(3,repeat("b",1000)),(4,repeat("c",1000)),(4,repeat("b",1000));
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SELECT GROUP_CONCAT(t1.language_id SEPARATOR ',') AS `translation_resources`, `d`.`serialized_c` FROM t2 AS `d` LEFT JOIN t1 ON `d`.`voter_id` = t1.`voter_id` GROUP BY `d`.`voter_id` ORDER BY 10-d.voter_id+RAND()*0;
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translation_resources serialized_c
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NULL cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc
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NULL bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb
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NULL aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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NULL aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
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drop table t1,t2;
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set global innodb_stats_persistent= @innodb_stats_persistent_save;
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set global innodb_stats_persistent_sample_pages=
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@innodb_stats_persistent_sample_pages_save;
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