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7591a24fa6
Try to use more deterministic floating-point operations. Apparently, 2.2 > 2.2 wrongly holds on many platforms, but not ppc64le on the compiler used on Red Had Enterprise Linux 8. The reason could be an infinite binary presentation: 2.2 = 0b10.001100110011… With t1_f = 2.5 = 0b10.1, t1_f > 2.5 would no longer hold on AMD64. Let us replace the 2.2 with 2.5 and compare t1_f >= 2.5 in order to get more consistent results across all platforms.
244 lines
6.5 KiB
Plaintext
244 lines
6.5 KiB
Plaintext
#
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# WL#6469: Optimizing CREATE/DROP performance for temporary tables
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#
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--source include/no_valgrind_without_big.inc
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--source include/have_innodb.inc
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#########################################################################
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# #
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# Will test following scenarios: #
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# 1. Create/Drop of temp-table. (with and w/o explicit pk) #
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# 2. Truncate temp-table (result in table drop and recreate). #
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# 3. Alter of temp-table. #
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# 4. Import/Discard of temp-table (to check blocked action) #
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# 5. Renaming of temp-table #
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# 6. Creating temp-table with large prefix. #
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# 7. Check Temp table info not stored in I_S datafile and tables #
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#########################################################################
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#-------------------------------------------------------------
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#
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# 1. Create/Drop of temp-table. (with and w/o explicit pk) #
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#
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create temporary table t1 (i int) engine = innodb;
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insert into t1 values (1), (2), (3), (4);
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select * from t1;
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select * from t1 where i = 4;
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drop table t1;
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#
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# recreate table wih same name to ensure entries are removed.
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create temporary table t1 (i int) engine = innodb;
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insert into t1 values (1), (2), (3), (4);
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select * from t1;
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select * from t1 where i = 4;
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drop table t1;
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#
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create temporary table t2 (i int) engine = innodb;
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insert into t2 values (1), (2), (3), (4);
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select * from t2;
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select * from t2 where i = 4;
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drop table t2;
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#-------------------------------------------------------------
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#
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# 2. Truncate temp-table (result in table drop and recreate). #
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#
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create temporary table t1
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(keyc int, c1 char(100), c2 char(100),
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primary key(keyc)) engine = innodb;
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delimiter |;
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create procedure populate_t1()
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begin
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declare i int default 1;
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while (i <= 200) DO
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insert into t1 values (i, 'a', 'b');
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set i = i + 1;
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end while;
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end|
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delimiter ;|
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set autocommit=0;
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select count(*) from t1;
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call populate_t1();
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select count(*) from t1;
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select * from t1 limit 10;
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set autocommit=1;
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truncate table t1;
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select count(*) from t1;
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drop table t1;
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#
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# recreate table wih same name to ensure entries are removed.
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create temporary table t1 (i int) engine = innodb;
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insert into t1 values (1), (2), (3), (4);
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select * from t1;
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select * from t1 where i = 4;
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drop table t1;
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#
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create temporary table t1
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(keyc int, c1 char(100), c2 char(100),
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primary key(keyc))
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engine = innodb;
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begin;
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select count(*) from t1;
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call populate_t1();
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select count(*) from t1;
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rollback;
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select count(*) from t1;
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begin;
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call populate_t1();
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commit;
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select count(*) from t1;
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truncate table t1;
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select count(*) from t1;
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drop table t1;
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#
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drop procedure populate_t1;
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#-------------------------------------------------------------
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#
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# 3. Alter of temp-table.
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#
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create temporary table t1 (t1_i int, t1_f float) engine = innodb;
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insert into t1 values (1, 1.1), (2, 2.5), (3, 2.5), (4, 4.4);
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#
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explain select * from t1 where t1_i = 1;
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alter table t1 add unique index pri_index(t1_i);
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explain select * from t1 where t1_i = 1;
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select * from t1 where t1_i = 1;
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#
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--error ER_DUP_ENTRY
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alter table t1 add unique index sec_index(t1_f);
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alter table t1 add index sec_index(t1_f);
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explain select * from t1 where t1_f >= 2.5;
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select * from t1 where t1_f >= 2.5;
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#
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alter table t1 add column (t1_c char(10));
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select * from t1;
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insert into t1 values (5, 5.5, 'krunal');
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#
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alter table t1 drop column t1_f;
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show create table t1;
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--error ER_BAD_FIELD_ERROR
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select * from t1 where t1_f >= 2.5;
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#
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--error ER_ALTER_OPERATION_NOT_SUPPORTED
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alter table t1 add index sec_index2(t1_c), algorithm=inplace;
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#
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drop table t1;
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#-------------------------------------------------------------
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#
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# 4. Import/Discard of temp-table (to check blocked action)
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#
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create temporary table t1 (i int, f float) engine = innodb;
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insert into t1 values (10, 1.1), (20, 2.2);
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select * from t1;
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#
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--error ER_CANNOT_DISCARD_TEMPORARY_TABLE
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alter table t1 discard tablespace;
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--error ER_CANNOT_DISCARD_TEMPORARY_TABLE
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alter table t1 import tablespace;
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drop table t1;
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#-------------------------------------------------------------
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#
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# 5. Renaming of temp-table #
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#
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create temporary table t1 (i int) engine=innodb;
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insert into t1 values (1), (2), (3);
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select * from t1;
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#
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alter table t1 rename t2;
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--error ER_NO_SUCH_TABLE
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select * from t1;
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select * from t2;
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insert into t2 values (1), (2), (6), (7);
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select * from t2;
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drop table t2;
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#-------------------------------------------------------------
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#
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# 6. Creating temp-table with large prefix. #
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#
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SET sql_mode = 'NO_ENGINE_SUBSTITUTION';
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# This will lead to warnings on innodb_page_size=8k or 4k:
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# 8k: Specified key was too long; max key length is 1536 bytes
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# 4k: Specified key was too long; max key length is 768 bytes
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--disable_warnings
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#
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create temporary table t (
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a int not null,
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b blob not null,
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index sk (b(3021))
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) row_format = dynamic engine=innodb;
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drop table t;
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#
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create temporary table t (
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a int not null,
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b blob not null,
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index sk (b(3021))
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) row_format = dynamic engine=innodb;
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drop table t;
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#
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create temporary table t (
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a int not null,
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b blob not null,
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index sk (b(3021))
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) row_format = dynamic engine=innodb;
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drop table t;
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#
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SET innodb_strict_mode=OFF;
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--error ER_INDEX_COLUMN_TOO_LONG
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create temporary table t (
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a int not null,
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b blob not null,
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index sk (b(3021))
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) row_format = compact engine=innodb;
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#
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create temporary table t (
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a int not null,
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b blob not null,
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index sk (b(3021))
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) row_format = dynamic engine=innodb;
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drop table t;
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#
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create temporary table t (
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a int not null,
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b blob not null,
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index sk (b(3021))
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) row_format = compressed engine=innodb;
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drop table t;
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#
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--error ER_INDEX_COLUMN_TOO_LONG
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create temporary table t (
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a int not null,
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b blob not null,
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index sk (b(3021))
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) row_format = compact engine=innodb;
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#
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create temporary table t (
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a int not null,
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b blob not null,
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index sk (b(3021))
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) row_format = dynamic engine=innodb;
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drop table t;
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--enable_warnings
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#
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#-------------------------------------------------------------
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#
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# 7. Temp table info not stored in I_S
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#
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CREATE TABLE t1 ( i INT ) ENGINE = Innodb;
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CREATE TEMPORARY TABLE t2 ( i INT ) ENGINE = Innodb;
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SELECT COUNT(*) FROM information_schema.INNODB_SYS_DATAFILES WHERE PATH LIKE '%test%t_';
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SELECT COUNT(*) FROM information_schema.INNODB_SYS_TABLES WHERE NAME LIKE '%test%t_';
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CREATE TEMPORARY table t3 ( i INT ) ENGINE = Innodb;
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SELECT COUNT(*) FROM information_schema.INNODB_SYS_DATAFILES WHERE PATH LIKE '%test%t_';
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SELECT COUNT(*) FROM information_schema.INNODB_SYS_TABLES WHERE NAME LIKE '%test%t_';
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DROP TABLE t1,t2,t3;
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SELECT COUNT(*) FROM information_schema.INNODB_SYS_DATAFILES WHERE PATH LIKE '%test%t_';
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SELECT COUNT(*) FROM information_schema.INNODB_SYS_TABLES WHERE NAME LIKE '%test%t_';
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