331 lines
19 KiB
Plaintext
331 lines
19 KiB
Plaintext
select * from information_schema.profiling;
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QUERY_ID SEQ STATE DURATION CPU_USER CPU_SYSTEM CONTEXT_VOLUNTARY CONTEXT_INVOLUNTARY BLOCK_OPS_IN BLOCK_OPS_OUT MESSAGES_SENT MESSAGES_RECEIVED PAGE_FAULTS_MAJOR PAGE_FAULTS_MINOR SWAPS SOURCE_FUNCTION SOURCE_FILE SOURCE_LINE
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set @@profiling=1;
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select * from information_schema.profiling;
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QUERY_ID SEQ STATE DURATION CPU_USER CPU_SYSTEM CONTEXT_VOLUNTARY CONTEXT_INVOLUNTARY BLOCK_OPS_IN BLOCK_OPS_OUT MESSAGES_SENT MESSAGES_RECEIVED PAGE_FAULTS_MAJOR PAGE_FAULTS_MINOR SWAPS SOURCE_FUNCTION SOURCE_FILE SOURCE_LINE
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0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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select * from information_schema.SCHEMATA where schema_name='mysql';
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CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH TIDB_PLACEMENT_POLICY_NAME
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def mysql utf8mb4 utf8mb4_bin NULL NULL
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drop user if exists schemata_tester;
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create user schemata_tester;
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select count(*) from information_schema.SCHEMATA;
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count(*)
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1
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select * from information_schema.SCHEMATA where schema_name='mysql';
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CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH TIDB_PLACEMENT_POLICY_NAME
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select * from information_schema.SCHEMATA where schema_name='INFORMATION_SCHEMA';
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CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH TIDB_PLACEMENT_POLICY_NAME
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def INFORMATION_SCHEMA utf8mb4 utf8mb4_bin NULL NULL
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CREATE ROLE r_mysql_priv;
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GRANT ALL PRIVILEGES ON mysql.* TO r_mysql_priv;
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GRANT r_mysql_priv TO schemata_tester;
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set role r_mysql_priv;
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select count(*) from information_schema.SCHEMATA;
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count(*)
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2
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select * from information_schema.SCHEMATA;
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CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH TIDB_PLACEMENT_POLICY_NAME
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def INFORMATION_SCHEMA utf8mb4 utf8mb4_bin NULL NULL
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def mysql utf8mb4 utf8mb4_bin NULL NULL
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drop table if exists executor__infoschema_reader.t;
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create table executor__infoschema_reader.t (a int, b int, primary key(a), key k1(b));
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select index_id from information_schema.tidb_indexes where table_schema = 'executor__infoschema_reader' and table_name = 't';
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index_id
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0
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1
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select tidb_table_id > 0 from information_schema.tables where table_schema = 'executor__infoschema_reader' and table_name = 't';
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tidb_table_id > 0
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1
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drop database if exists `foo`;
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CREATE DATABASE `foo` DEFAULT CHARACTER SET = 'utf8mb4';
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select default_character_set_name, default_collation_name FROM information_schema.SCHEMATA WHERE schema_name = 'foo';
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default_character_set_name default_collation_name
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utf8mb4 utf8mb4_bin
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drop database `foo`;
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drop view if exists executor__infoschema_reader.v1;
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CREATE DEFINER='root'@'localhost' VIEW executor__infoschema_reader.v1 AS SELECT 1;
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select TABLE_COLLATION is null from INFORMATION_SCHEMA.TABLES WHERE TABLE_TYPE='VIEW';
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TABLE_COLLATION is null
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1
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1
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1
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SELECT * FROM information_schema.views WHERE table_schema='executor__infoschema_reader' AND table_name='v1';
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TABLE_CATALOG TABLE_SCHEMA TABLE_NAME VIEW_DEFINITION CHECK_OPTION IS_UPDATABLE DEFINER SECURITY_TYPE CHARACTER_SET_CLIENT COLLATION_CONNECTION
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def executor__infoschema_reader v1 SELECT 1 AS `1` CASCADED NO root@localhost DEFINER utf8mb4 utf8mb4_general_ci
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SELECT table_catalog, table_schema, table_name, table_type, engine, version, row_format, table_rows, avg_row_length, data_length, max_data_length, index_length, data_free, auto_increment, update_time, check_time, table_collation, checksum, create_options, table_comment FROM information_schema.tables WHERE table_schema='executor__infoschema_reader' AND table_name='v1';
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table_catalog table_schema table_name table_type engine version row_format table_rows avg_row_length data_length max_data_length index_length data_free auto_increment update_time check_time table_collation checksum create_options table_comment
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def executor__infoschema_reader v1 VIEW NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL NULL VIEW
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drop table if exists t;
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create table t (bit bit(10) DEFAULT b'100');
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SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_SCHEMA = 'executor__infoschema_reader' AND TABLE_NAME = 't';
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TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME ORDINAL_POSITION COLUMN_DEFAULT IS_NULLABLE DATA_TYPE CHARACTER_MAXIMUM_LENGTH CHARACTER_OCTET_LENGTH NUMERIC_PRECISION NUMERIC_SCALE DATETIME_PRECISION CHARACTER_SET_NAME COLLATION_NAME COLUMN_TYPE COLUMN_KEY EXTRA PRIVILEGES COLUMN_COMMENT GENERATION_EXPRESSION
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def executor__infoschema_reader t bit 1 b'100' YES bit NULL NULL 10 0 NULL NULL NULL bit(10) select,insert,update,references
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drop table if exists t;
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set time_zone='+08:00';
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drop table if exists t;
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create table t (b timestamp(3) NOT NULL DEFAULT '1970-01-01 08:00:01.000');
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select column_default from information_schema.columns where TABLE_NAME='t' and TABLE_SCHEMA='executor__infoschema_reader';
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column_default
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1970-01-01 08:00:01.000
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set time_zone='+04:00';
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select column_default from information_schema.columns where TABLE_NAME='t' and TABLE_SCHEMA='executor__infoschema_reader';
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column_default
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1970-01-01 04:00:01.000
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set time_zone=default;
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drop table if exists t;
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create table t (a bit DEFAULT (rand()));
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select column_default from information_schema.columns where TABLE_NAME='t' and TABLE_SCHEMA='executor__infoschema_reader';
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column_default
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rand()
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drop table if exists t;
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CREATE TABLE t (`COL3` bit(1) NOT NULL,b year) ;
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select column_type from information_schema.columns where TABLE_SCHEMA = 'executor__infoschema_reader' and TABLE_NAME = 't';
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column_type
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bit(1)
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year(4)
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select ordinal_position from information_schema.columns where table_schema=database() and table_name='t' and column_name='b';
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ordinal_position
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2
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select * from information_schema.ENGINES;
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ENGINE SUPPORT COMMENT TRANSACTIONS XA SAVEPOINTS
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InnoDB DEFAULT Supports transactions, row-level locking, and foreign keys YES YES YES
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drop table if exists t;
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create table t (a varchar(255) collate ascii_bin);
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select character_maximum_length, character_octet_length from information_schema.columns where table_schema=(select database()) and table_name='t';
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character_maximum_length character_octet_length
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255 255
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drop table t;
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create table t (a varchar(255) collate utf8mb4_bin);
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select character_maximum_length, character_octet_length from information_schema.columns where table_schema=(select database()) and table_name='t';
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character_maximum_length character_octet_length
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255 1020
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drop table t;
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create table t (a varchar(255) collate utf8_bin);
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select character_maximum_length, character_octet_length from information_schema.columns where table_schema=(select database()) and table_name='t';
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character_maximum_length character_octet_length
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255 765
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drop table t;
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create table t (a char(10) collate ascii_bin);
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select character_maximum_length, character_octet_length from information_schema.columns where table_schema=(select database()) and table_name='t';
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character_maximum_length character_octet_length
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10 10
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drop table t;
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create table t (a char(10) collate utf8mb4_bin);
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select character_maximum_length, character_octet_length from information_schema.columns where table_schema=(select database()) and table_name='t';
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character_maximum_length character_octet_length
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10 40
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drop table t;
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create table t (a set('a', 'b', 'cccc') collate ascii_bin);
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select character_maximum_length, character_octet_length from information_schema.columns where table_schema=(select database()) and table_name='t';
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character_maximum_length character_octet_length
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8 8
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drop table t;
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create table t (a set('a', 'b', 'cccc') collate utf8mb4_bin);
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select character_maximum_length, character_octet_length from information_schema.columns where table_schema=(select database()) and table_name='t';
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character_maximum_length character_octet_length
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8 32
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drop table t;
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create table t (a enum('a', 'b', 'cccc') collate ascii_bin);
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select character_maximum_length, character_octet_length from information_schema.columns where table_schema=(select database()) and table_name='t';
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character_maximum_length character_octet_length
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4 4
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drop table t;
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create table t (a enum('a', 'b', 'cccc') collate utf8mb4_bin);
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select character_maximum_length, character_octet_length from information_schema.columns where table_schema=(select database()) and table_name='t';
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character_maximum_length character_octet_length
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4 16
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drop table t;
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set global tidb_ddl_enable_fast_reorg = false;
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drop database if exists test_ddl_jobs;
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create database test_ddl_jobs;
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select db_name, job_type from information_schema.DDL_JOBS limit 1;
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db_name job_type
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test_ddl_jobs create schema
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use test_ddl_jobs;
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create table t (a int);
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select db_name, table_name, job_type from information_schema.DDL_JOBS where DB_NAME = 'test_ddl_jobs' and table_name = 't';
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db_name table_name job_type
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test_ddl_jobs t create table
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select job_type from information_schema.DDL_JOBS group by job_type having job_type = 'create table';
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job_type
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create table
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select distinct job_type from information_schema.DDL_JOBS where job_type = 'create table' and start_time > str_to_date('20190101','%Y%m%d%H%i%s');
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job_type
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create table
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drop user if exists DDL_JOBS_tester;
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create user DDL_JOBS_tester;
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select DB_NAME, TABLE_NAME from information_schema.DDL_JOBS where DB_NAME = 'test_ddl_jobs' and TABLE_NAME = 't';
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DB_NAME TABLE_NAME
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CREATE ROLE r_priv;
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GRANT ALL PRIVILEGES ON test_ddl_jobs.* TO r_priv;
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GRANT r_priv TO DDL_JOBS_tester;
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set role r_priv;
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select DB_NAME, TABLE_NAME from information_schema.DDL_JOBS where DB_NAME = 'test_ddl_jobs' and TABLE_NAME = 't';
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DB_NAME TABLE_NAME
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test_ddl_jobs t
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create table tt (a int);
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alter table tt add index t(a), add column b int;
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select db_name, table_name, job_type from information_schema.DDL_JOBS limit 3;
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db_name table_name job_type
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test_ddl_jobs tt alter table multi-schema change
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test_ddl_jobs tt add column /* subjob */
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test_ddl_jobs tt add index /* subjob */ /* txn */
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drop database test_ddl_jobs;
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use executor__infoschema_reader;
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set global tidb_ddl_enable_fast_reorg = default;
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select * from information_schema.KEY_COLUMN_USAGE where TABLE_NAME='stats_meta' and COLUMN_NAME='table_id';
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CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME ORDINAL_POSITION POSITION_IN_UNIQUE_CONSTRAINT REFERENCED_TABLE_SCHEMA REFERENCED_TABLE_NAME REFERENCED_COLUMN_NAME
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def mysql tbl def mysql stats_meta table_id 1 NULL NULL NULL NULL
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create user key_column_tester;
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select * from information_schema.KEY_COLUMN_USAGE where TABLE_NAME != 'CLUSTER_SLOW_QUERY';
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CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME ORDINAL_POSITION POSITION_IN_UNIQUE_CONSTRAINT REFERENCED_TABLE_SCHEMA REFERENCED_TABLE_NAME REFERENCED_COLUMN_NAME
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CREATE ROLE r_stats_meta ;
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GRANT ALL PRIVILEGES ON mysql.stats_meta TO r_stats_meta;
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GRANT r_stats_meta TO key_column_tester;
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set role r_stats_meta;
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select count(*)>0 from information_schema.KEY_COLUMN_USAGE where TABLE_NAME='stats_meta';
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count(*)>0
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1
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select count(*)>0 from information_schema.KEY_COLUMN_USAGE where upper(TABLE_NAME)='STATS_META';
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count(*)>0
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1
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select count(*)>0 from information_schema.KEY_COLUMN_USAGE where lower(TABLE_NAME)='stats_meta';
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count(*)>0
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1
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drop table if exists e, e2;
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CREATE TABLE e ( id INT NOT NULL, fname VARCHAR(30), lname VARCHAR(30)) PARTITION BY RANGE (id) (
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PARTITION p0 VALUES LESS THAN (50),
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PARTITION p1 VALUES LESS THAN (100),
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PARTITION p2 VALUES LESS THAN (150),
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PARTITION p3 VALUES LESS THAN (MAXVALUE));
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CREATE TABLE e2 ( id INT NOT NULL, fname VARCHAR(30), lname VARCHAR(30));
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SELECT PARTITION_NAME, TABLE_ROWS FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_NAME = 'e' and table_schema=(select database());
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PARTITION_NAME TABLE_ROWS
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p0 0
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p1 0
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p2 0
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p3 0
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INSERT INTO e VALUES (1669, "Jim", "Smith"), (337, "Mary", "Jones"), (16, "Frank", "White"), (2005, "Linda", "Black");
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set tidb_enable_exchange_partition='on';
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ALTER TABLE e EXCHANGE PARTITION p0 WITH TABLE e2;
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INSERT INTO e VALUES (41, "Michael", "Green");
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analyze table e;
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SELECT PARTITION_NAME, TABLE_ROWS FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_NAME = 'e';
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PARTITION_NAME TABLE_ROWS
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p0 1
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p1 0
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p2 0
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p3 3
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set tidb_enable_exchange_partition=default;
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select count(*) > 0 from information_schema.`METRICS_TABLES`;
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count(*) > 0
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1
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select * from information_schema.`METRICS_TABLES` where table_name='tidb_qps';
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TABLE_NAME PROMQL LABELS QUANTILE COMMENT
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tidb_qps sum(rate(tidb_server_query_total{$LABEL_CONDITIONS}[$RANGE_DURATION])) by (result,type,instance) instance,type,result 0 TiDB query processing numbers per second
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select * from information_schema.TABLE_CONSTRAINTS where TABLE_NAME='gc_delete_range';
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CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_SCHEMA TABLE_NAME CONSTRAINT_TYPE
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def mysql delete_range_index mysql gc_delete_range UNIQUE
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select * from information_schema.SESSION_VARIABLES where VARIABLE_NAME='tidb_retry_limit';
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VARIABLE_NAME VARIABLE_VALUE
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tidb_retry_limit 10
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drop sequence if exists seq, seq2;
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CREATE SEQUENCE seq maxvalue 10000000;
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SELECT * FROM information_schema.sequences WHERE sequence_schema='executor__infoschema_reader' AND sequence_name='seq';
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TABLE_CATALOG SEQUENCE_SCHEMA SEQUENCE_NAME CACHE CACHE_VALUE CYCLE INCREMENT MAX_VALUE MIN_VALUE START COMMENT
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def executor__infoschema_reader seq 1 1000 0 1 10000000 1 1
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DROP SEQUENCE seq;
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CREATE SEQUENCE seq start = -1 minvalue -1 maxvalue 10 increment 1 cache 10;
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SELECT * FROM information_schema.sequences WHERE sequence_schema='executor__infoschema_reader' AND sequence_name='seq';
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TABLE_CATALOG SEQUENCE_SCHEMA SEQUENCE_NAME CACHE CACHE_VALUE CYCLE INCREMENT MAX_VALUE MIN_VALUE START COMMENT
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def executor__infoschema_reader seq 1 10 0 1 10 -1 -1
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CREATE SEQUENCE seq2 start = -9 minvalue -10 maxvalue 10 increment -1 cache 15;
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SELECT * FROM information_schema.sequences WHERE sequence_schema='executor__infoschema_reader' AND sequence_name='seq2';
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TABLE_CATALOG SEQUENCE_SCHEMA SEQUENCE_NAME CACHE CACHE_VALUE CYCLE INCREMENT MAX_VALUE MIN_VALUE START COMMENT
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def executor__infoschema_reader seq2 1 15 0 -1 10 -10 -9
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SELECT TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME , TABLE_TYPE, ENGINE, TABLE_ROWS FROM information_schema.tables WHERE TABLE_TYPE='SEQUENCE' AND TABLE_NAME='seq2' and table_schema='executor__infoschema_reader';
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TABLE_CATALOG TABLE_SCHEMA TABLE_NAME TABLE_TYPE ENGINE TABLE_ROWS
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def executor__infoschema_reader seq2 SEQUENCE InnoDB 1
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drop table if exists t_int, t_implicit, t_common;
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create table t_int (a int primary key, b int);
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SELECT TIDB_PK_TYPE FROM information_schema.tables where table_schema = 'executor__infoschema_reader' and table_name = 't_int';
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TIDB_PK_TYPE
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CLUSTERED
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set tidb_enable_clustered_index=int_only;
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create table t_implicit (a varchar(64) primary key, b int);
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SELECT TIDB_PK_TYPE FROM information_schema.tables where table_schema = 'executor__infoschema_reader' and table_name = 't_implicit';
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TIDB_PK_TYPE
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NONCLUSTERED
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set tidb_enable_clustered_index=on;
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create table t_common (a varchar(64) primary key, b int);
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SELECT TIDB_PK_TYPE FROM information_schema.tables where table_schema = 'executor__infoschema_reader' and table_name = 't_common';
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TIDB_PK_TYPE
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CLUSTERED
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SELECT TIDB_PK_TYPE FROM information_schema.tables where table_schema = 'INFORMATION_SCHEMA' and table_name = 'TABLES';
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TIDB_PK_TYPE
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NONCLUSTERED
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set tidb_enable_clustered_index=default;
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drop table if exists t;
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CREATE TABLE t ( id int DEFAULT NULL);
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CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`1.1.1.1` SQL SECURITY DEFINER VIEW `v_test` (`type`) AS SELECT NULL AS `type` FROM `t` AS `f`;
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select * from information_schema.columns where TABLE_SCHEMA = 'executor__infoschema_reader' and TABLE_NAME = 'v_test';
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TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME ORDINAL_POSITION COLUMN_DEFAULT IS_NULLABLE DATA_TYPE CHARACTER_MAXIMUM_LENGTH CHARACTER_OCTET_LENGTH NUMERIC_PRECISION NUMERIC_SCALE DATETIME_PRECISION CHARACTER_SET_NAME COLLATION_NAME COLUMN_TYPE COLUMN_KEY EXTRA PRIVILEGES COLUMN_COMMENT GENERATION_EXPRESSION
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def executor__infoschema_reader v_test type 1 NULL YES binary 0 0 NULL NULL NULL NULL NULL binary(0) select,insert,update,references
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drop user if exists usageuser;
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create user usageuser;
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SELECT * FROM information_schema.user_privileges WHERE grantee="'usageuser'@'%'";
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GRANTEE TABLE_CATALOG PRIVILEGE_TYPE IS_GRANTABLE
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'usageuser'@'%' def USAGE NO
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GRANT SELECT ON *.* to usageuser;
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SELECT * FROM information_schema.user_privileges WHERE grantee="'usageuser'@'%'";
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GRANTEE TABLE_CATALOG PRIVILEGE_TYPE IS_GRANTABLE
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'usageuser'@'%' def SELECT NO
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GRANT SELECT ON *.* to usageuser WITH GRANT OPTION;
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SELECT * FROM information_schema.user_privileges WHERE grantee="'usageuser'@'%'";
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GRANTEE TABLE_CATALOG PRIVILEGE_TYPE IS_GRANTABLE
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'usageuser'@'%' def SELECT YES
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GRANT BACKUP_ADMIN ON *.* to usageuser;
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SELECT * FROM information_schema.user_privileges WHERE grantee="'usageuser'@'%'" ORDER BY privilege_type;
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GRANTEE TABLE_CATALOG PRIVILEGE_TYPE IS_GRANTABLE
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'usageuser'@'%' def BACKUP_ADMIN NO
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'usageuser'@'%' def SELECT YES
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select VARIABLE_NAME from information_schema.VARIABLES_INFO where DEFAULT_VALUE = CURRENT_VALUE and variable_name in ('tidb_enable_async_commit','tidb_enable_1pc', 'tidb_mem_oom_action', 'tidb_enable_auto_analyze', 'tidb_row_format_version', 'tidb_txn_assertion_level', 'tidb_enable_mutation_checker', 'tidb_pessimistic_txn_fair_locking') order by VARIABLE_NAME;
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VARIABLE_NAME
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tidb_enable_1pc
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tidb_enable_async_commit
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tidb_enable_auto_analyze
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tidb_enable_mutation_checker
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tidb_mem_oom_action
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tidb_pessimistic_txn_fair_locking
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tidb_row_format_version
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tidb_txn_assertion_level
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set global tidb_enable_async_commit = default;
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set global tidb_enable_1pc = default;
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set global tidb_mem_oom_action = default;
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set global tidb_enable_auto_analyze = default;
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set global tidb_row_format_version = default;
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set global tidb_txn_assertion_level = default;
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set global tidb_enable_mutation_checker = default;
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set global tidb_pessimistic_txn_fair_locking = default;
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select a.VARIABLE_NAME from information_schema.VARIABLES_INFO as a, mysql.GLOBAL_VARIABLES as b where a.VARIABLE_NAME = b.VARIABLE_NAME and a.DEFAULT_VALUE = b.VARIABLE_VALUE and a.CURRENT_VALUE = b.VARIABLE_VALUE and a.variable_name in ('tidb_enable_async_commit','tidb_enable_1pc', 'tidb_mem_oom_action', 'tidb_enable_auto_analyze', 'tidb_row_format_version', 'tidb_txn_assertion_level', 'tidb_enable_mutation_checker', 'tidb_pessimistic_txn_fair_locking') order by VARIABLE_NAME;
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VARIABLE_NAME
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tidb_enable_1pc
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tidb_enable_async_commit
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tidb_enable_auto_analyze
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tidb_enable_mutation_checker
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tidb_mem_oom_action
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tidb_pessimistic_txn_fair_locking
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tidb_row_format_version
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tidb_txn_assertion_level
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drop table if exists t;
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CREATE TABLE t (a int, b int, c varchar(5), primary key(a), index idx(c)) PARTITION BY RANGE (a) (PARTITION p0 VALUES LESS THAN (6), PARTITION p1 VALUES LESS THAN (11), PARTITION p2 VALUES LESS THAN (16));
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insert into t(a, b, c) values(1, 2, 'c'), (7, 3, 'd'), (12, 4, 'e');
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analyze table t;
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select sleep(1);
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sleep(1)
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0
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select table_rows, avg_row_length, data_length, index_length from information_schema.tables where table_name='t' AND TABLE_SCHEMA='executor__infoschema_reader';
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table_rows avg_row_length data_length index_length
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3 18 54 6
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