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MySQL 5.7 allows temporary tables to be created in ROW_FORMAT=COMPRESSED. The usefulness of this is questionable. WL#7899 in MySQL 8.0.0 prevents the creation of such compressed tables, so that all InnoDB temporary tables will be located inside the predefined InnoDB temporary tablespace. Pick up and adjust some tests from MySQL 5.7 and 8.0. dict_tf_to_fsp_flags(): Remove the parameter is_temp. fsp_flags_init(): Remove the parameter is_temporary. row_mysql_drop_temp_tables(): Remove. There cannot be any temporary tables in InnoDB. (This never removed #sql* tables in the datadir which were created by DDL.) dict_table_t::dir_path_of_temp_table: Remove. create_table_info_t::m_temp_path: Remove. create_table_info_t::create_options_are_invalid(): Do not allow ROW_FORMAT=COMPRESSED or KEY_BLOCK_SIZE for temporary tables. create_table_info_t::innobase_table_flags(): Do not unnecessarily prevent CREATE TEMPORARY TABLE with SPATIAL INDEX. (MySQL 5.7 does allow this.) fil_space_belongs_in_lru(): The only FIL_TYPE_TEMPORARY tablespace is never subjected to closing least-recently-used files.
243 lines
6.5 KiB
Text
243 lines
6.5 KiB
Text
#
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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, 2.2), (3, 2.2), (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 > 2.2;
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select * from t1 where t1_f > 2.2;
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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 > 2.2;
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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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