mirror of
https://github.com/MariaDB/server.git
synced 2025-01-17 04:22:27 +01:00
1164 lines
42 KiB
Text
1164 lines
42 KiB
Text
DROP TABLE IF EXISTS t0,t1,t2,t3,t4,t5;
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DROP VIEW IF EXISTS v1;
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show variables where variable_name like "skip_show_database";
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Variable_name Value
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skip_show_database OFF
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grant select, update, execute on test.* to mysqltest_2@localhost;
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grant select, update on test.* to mysqltest_1@localhost;
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create user mysqltest_3@localhost;
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create user mysqltest_3;
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select * from information_schema.SCHEMATA where schema_name > 'm';
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CATALOG_NAME SCHEMA_NAME DEFAULT_CHARACTER_SET_NAME DEFAULT_COLLATION_NAME SQL_PATH
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NULL mysql latin1 latin1_swedish_ci NULL
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NULL test latin1 latin1_swedish_ci NULL
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select schema_name from information_schema.schemata;
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schema_name
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information_schema
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cluster
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mysql
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test
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show databases like 't%';
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Database (t%)
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test
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show databases;
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Database
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information_schema
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cluster
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mysql
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test
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show databases where `database` = 't%';
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Database
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create database mysqltest;
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create table mysqltest.t1(a int, b VARCHAR(30), KEY string_data (b));
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create table test.t2(a int);
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create table t3(a int, KEY a_data (a));
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create table mysqltest.t4(a int);
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create table t5 (id int auto_increment primary key);
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insert into t5 values (10);
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create view v1 (c) as select table_name from information_schema.TABLES;
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select * from v1;
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c
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CHARACTER_SETS
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COLLATIONS
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COLLATION_CHARACTER_SET_APPLICABILITY
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COLUMNS
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COLUMN_PRIVILEGES
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ENGINES
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EVENTS
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FILES
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KEY_COLUMN_USAGE
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PARTITIONS
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PLUGINS
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PROCESSLIST
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REFERENTIAL_CONSTRAINTS
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ROUTINES
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SCHEMATA
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SCHEMA_PRIVILEGES
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STATISTICS
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TABLES
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TABLE_CONSTRAINTS
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TABLE_PRIVILEGES
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TRIGGERS
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USER_PRIVILEGES
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VIEWS
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binlog_index
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columns_priv
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db
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event
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func
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general_log
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help_category
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help_keyword
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help_relation
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help_topic
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host
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plugin
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proc
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procs_priv
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slow_log
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tables_priv
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time_zone
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time_zone_leap_second
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time_zone_name
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time_zone_transition
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time_zone_transition_type
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user
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t1
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t4
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t2
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t3
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t5
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v1
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select c,table_name from v1
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inner join information_schema.TABLES v2 on (v1.c=v2.table_name)
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where v1.c like "t%";
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c table_name
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TABLES TABLES
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TABLE_CONSTRAINTS TABLE_CONSTRAINTS
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TABLE_PRIVILEGES TABLE_PRIVILEGES
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TRIGGERS TRIGGERS
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tables_priv tables_priv
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time_zone time_zone
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time_zone_leap_second time_zone_leap_second
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time_zone_name time_zone_name
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time_zone_transition time_zone_transition
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time_zone_transition_type time_zone_transition_type
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t1 t1
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t4 t4
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t2 t2
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t3 t3
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t5 t5
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select c,table_name from v1
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left join information_schema.TABLES v2 on (v1.c=v2.table_name)
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where v1.c like "t%";
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c table_name
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TABLES TABLES
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TABLE_CONSTRAINTS TABLE_CONSTRAINTS
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TABLE_PRIVILEGES TABLE_PRIVILEGES
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TRIGGERS TRIGGERS
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tables_priv tables_priv
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time_zone time_zone
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time_zone_leap_second time_zone_leap_second
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time_zone_name time_zone_name
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time_zone_transition time_zone_transition
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time_zone_transition_type time_zone_transition_type
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t1 t1
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t4 t4
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t2 t2
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t3 t3
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t5 t5
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select c, v2.table_name from v1
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right join information_schema.TABLES v2 on (v1.c=v2.table_name)
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where v1.c like "t%";
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c table_name
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TABLES TABLES
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TABLE_CONSTRAINTS TABLE_CONSTRAINTS
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TABLE_PRIVILEGES TABLE_PRIVILEGES
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TRIGGERS TRIGGERS
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tables_priv tables_priv
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time_zone time_zone
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time_zone_leap_second time_zone_leap_second
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time_zone_name time_zone_name
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time_zone_transition time_zone_transition
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time_zone_transition_type time_zone_transition_type
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t1 t1
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t4 t4
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t2 t2
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t3 t3
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t5 t5
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select table_name from information_schema.TABLES
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where table_schema = "mysqltest" and table_name like "t%";
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table_name
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t1
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t4
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select * from information_schema.STATISTICS where TABLE_SCHEMA = "mysqltest";
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TABLE_CATALOG TABLE_SCHEMA TABLE_NAME NON_UNIQUE INDEX_SCHEMA INDEX_NAME SEQ_IN_INDEX COLUMN_NAME COLLATION CARDINALITY SUB_PART PACKED NULLABLE INDEX_TYPE COMMENT
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NULL mysqltest t1 1 mysqltest string_data 1 b A NULL NULL NULL YES BTREE
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show keys from t3 where Key_name = "a_data";
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Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment
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t3 1 a_data 1 a A NULL NULL NULL YES BTREE
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show tables like 't%';
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Tables_in_test (t%)
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t2
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t3
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t5
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show table status;
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Name Engine Version Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Collation Checksum Create_options Comment
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t2 MyISAM 10 Fixed 0 0 0 # 1024 0 NULL # # NULL latin1_swedish_ci NULL
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t3 MyISAM 10 Fixed 0 0 0 # 1024 0 NULL # # NULL latin1_swedish_ci NULL
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t5 MyISAM 10 Fixed 1 7 7 # 2048 0 11 # # NULL latin1_swedish_ci NULL
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v1 NULL NULL NULL NULL NULL NULL # NULL NULL NULL # # NULL NULL NULL NULL VIEW
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show full columns from t3 like "a%";
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Field Type Collation Null Key Default Extra Privileges Comment
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a int(11) NULL YES MUL NULL select,insert,update,references
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show full columns from mysql.db like "Insert%";
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Field Type Collation Null Key Default Extra Privileges Comment
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Insert_priv enum('N','Y') utf8_general_ci NO N select,insert,update,references
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show full columns from v1;
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Field Type Collation Null Key Default Extra Privileges Comment
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c varchar(64) utf8_general_ci NO select,insert,update,references
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select * from information_schema.COLUMNS where table_name="t1"
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and column_name= "a";
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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 CHARACTER_SET_NAME COLLATION_NAME COLUMN_TYPE COLUMN_KEY EXTRA PRIVILEGES COLUMN_COMMENT
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NULL mysqltest t1 a 1 NULL YES int NULL NULL 10 0 NULL NULL int(11) select,insert,update,references
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show columns from mysqltest.t1 where field like "%a%";
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Field Type Null Key Default Extra
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a int(11) YES NULL
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create view mysqltest.v1 (c) as select a from mysqltest.t1;
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grant select (a) on mysqltest.t1 to mysqltest_2@localhost;
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grant select on mysqltest.v1 to mysqltest_3;
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select table_name, column_name, privileges from information_schema.columns
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where table_schema = 'mysqltest' and table_name = 't1';
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table_name column_name privileges
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t1 a select
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show columns from mysqltest.t1;
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Field Type Null Key Default Extra
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a int(11) YES NULL
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b varchar(30) YES MUL NULL
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select table_name, column_name, privileges from information_schema.columns
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where table_schema = 'mysqltest' and table_name = 'v1';
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table_name column_name privileges
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v1 c select
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drop view v1, mysqltest.v1;
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drop tables mysqltest.t4, mysqltest.t1, t2, t3, t5;
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drop database mysqltest;
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select * from information_schema.CHARACTER_SETS
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where CHARACTER_SET_NAME like 'latin1%';
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CHARACTER_SET_NAME DEFAULT_COLLATE_NAME DESCRIPTION MAXLEN
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latin1 latin1_swedish_ci cp1252 West European 1
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SHOW CHARACTER SET LIKE 'latin1%';
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Charset Description Default collation Maxlen
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latin1 cp1252 West European latin1_swedish_ci 1
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SHOW CHARACTER SET WHERE charset like 'latin1%';
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Charset Description Default collation Maxlen
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latin1 cp1252 West European latin1_swedish_ci 1
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select * from information_schema.COLLATIONS
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where COLLATION_NAME like 'latin1%';
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COLLATION_NAME CHARACTER_SET_NAME ID IS_DEFAULT IS_COMPILED SORTLEN
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latin1_german1_ci latin1 5 # 1
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latin1_swedish_ci latin1 8 Yes # 1
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latin1_danish_ci latin1 15 # 1
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latin1_german2_ci latin1 31 # 2
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latin1_bin latin1 47 # 1
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latin1_general_ci latin1 48 # 1
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latin1_general_cs latin1 49 # 1
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latin1_spanish_ci latin1 94 # 1
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SHOW COLLATION LIKE 'latin1%';
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Collation Charset Id Default Compiled Sortlen
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latin1_german1_ci latin1 5 # 1
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latin1_swedish_ci latin1 8 Yes # 1
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latin1_danish_ci latin1 15 # 1
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latin1_german2_ci latin1 31 # 2
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latin1_bin latin1 47 # 1
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latin1_general_ci latin1 48 # 1
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latin1_general_cs latin1 49 # 1
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latin1_spanish_ci latin1 94 # 1
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SHOW COLLATION WHERE collation like 'latin1%';
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Collation Charset Id Default Compiled Sortlen
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latin1_german1_ci latin1 5 # 1
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latin1_swedish_ci latin1 8 Yes # 1
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latin1_danish_ci latin1 15 # 1
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latin1_german2_ci latin1 31 # 2
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latin1_bin latin1 47 # 1
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latin1_general_ci latin1 48 # 1
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latin1_general_cs latin1 49 # 1
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latin1_spanish_ci latin1 94 # 1
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select * from information_schema.COLLATION_CHARACTER_SET_APPLICABILITY
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where COLLATION_NAME like 'latin1%';
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COLLATION_NAME CHARACTER_SET_NAME
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latin1_german1_ci latin1
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latin1_swedish_ci latin1
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latin1_danish_ci latin1
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latin1_german2_ci latin1
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latin1_bin latin1
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latin1_general_ci latin1
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latin1_general_cs latin1
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latin1_spanish_ci latin1
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drop procedure if exists sel2;
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drop function if exists sub1;
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drop function if exists sub2;
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create function sub1(i int) returns int
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return i+1;
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create procedure sel2()
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begin
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select * from t1;
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select * from t2;
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end|
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select parameter_style, sql_data_access, dtd_identifier
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from information_schema.routines;
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parameter_style sql_data_access dtd_identifier
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SQL CONTAINS SQL NULL
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SQL CONTAINS SQL int(11)
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show procedure status;
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Db Name Type Definer Modified Created Security_type Comment
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test sel2 PROCEDURE root@localhost # # DEFINER
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show function status;
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Db Name Type Definer Modified Created Security_type Comment
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test sub1 FUNCTION root@localhost # # DEFINER
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select a.ROUTINE_NAME from information_schema.ROUTINES a,
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information_schema.SCHEMATA b where
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a.ROUTINE_SCHEMA = b.SCHEMA_NAME;
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ROUTINE_NAME
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sel2
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sub1
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explain select a.ROUTINE_NAME from information_schema.ROUTINES a,
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information_schema.SCHEMATA b where
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a.ROUTINE_SCHEMA = b.SCHEMA_NAME;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE # ALL NULL NULL NULL NULL 2
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1 SIMPLE # ALL NULL NULL NULL NULL 2 Using where
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select a.ROUTINE_NAME, b.name from information_schema.ROUTINES a,
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mysql.proc b where a.ROUTINE_NAME = convert(b.name using utf8) order by 1;
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ROUTINE_NAME name
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sel2 sel2
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sub1 sub1
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select count(*) from information_schema.ROUTINES;
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count(*)
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2
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create view v1 as select routine_schema, routine_name from information_schema.routines
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order by routine_schema, routine_name;
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select * from v1;
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routine_schema routine_name
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test sel2
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test sub1
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drop view v1;
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select ROUTINE_NAME, ROUTINE_DEFINITION from information_schema.ROUTINES;
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ROUTINE_NAME ROUTINE_DEFINITION
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show create function sub1;
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ERROR 42000: FUNCTION sub1 does not exist
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select ROUTINE_NAME, ROUTINE_DEFINITION from information_schema.ROUTINES;
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ROUTINE_NAME ROUTINE_DEFINITION
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sel2
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sub1
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grant all privileges on test.* to mysqltest_1@localhost;
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select ROUTINE_NAME, ROUTINE_DEFINITION from information_schema.ROUTINES;
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ROUTINE_NAME ROUTINE_DEFINITION
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sel2
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sub1
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create function sub2(i int) returns int
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return i+1;
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select ROUTINE_NAME, ROUTINE_DEFINITION from information_schema.ROUTINES;
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ROUTINE_NAME ROUTINE_DEFINITION
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sel2
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sub1
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sub2 return i+1
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show create procedure sel2;
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Procedure sql_mode Create Procedure
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sel2
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show create function sub1;
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Function sql_mode Create Function
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sub1
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show create function sub2;
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Function sql_mode Create Function
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sub2 CREATE DEFINER=`mysqltest_1`@`localhost` FUNCTION `sub2`(i int) RETURNS int(11)
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return i+1
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show function status like "sub2";
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Db Name Type Definer Modified Created Security_type Comment
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test sub2 FUNCTION mysqltest_1@localhost # # DEFINER
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drop function sub2;
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show create procedure sel2;
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Procedure sql_mode Create Procedure
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sel2 CREATE DEFINER=`root`@`localhost` PROCEDURE `sel2`()
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begin
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select * from t1;
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select * from t2;
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end
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create view v0 (c) as select schema_name from information_schema.schemata;
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select * from v0;
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c
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information_schema
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cluster
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mysql
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test
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explain select * from v0;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY # ALL NULL NULL NULL NULL 2
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create view v1 (c) as select table_name from information_schema.tables
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where table_name="v1";
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select * from v1;
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c
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v1
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create view v2 (c) as select column_name from information_schema.columns
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where table_name="v2";
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select * from v2;
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c
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c
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create view v3 (c) as select CHARACTER_SET_NAME from information_schema.character_sets
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where CHARACTER_SET_NAME like "latin1%";
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select * from v3;
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c
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latin1
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create view v4 (c) as select COLLATION_NAME from information_schema.collations
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where COLLATION_NAME like "latin1%";
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select * from v4;
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c
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latin1_german1_ci
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latin1_swedish_ci
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latin1_danish_ci
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latin1_german2_ci
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latin1_bin
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latin1_general_ci
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latin1_general_cs
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latin1_spanish_ci
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show keys from v4;
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Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment
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select * from information_schema.views where TABLE_NAME like "v%";
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TABLE_CATALOG TABLE_SCHEMA TABLE_NAME VIEW_DEFINITION CHECK_OPTION IS_UPDATABLE DEFINER SECURITY_TYPE
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NULL test v0 select sql_no_cache `schemata`.`SCHEMA_NAME` AS `c` from `information_schema`.`schemata` NONE NO root@localhost DEFINER
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NULL test v1 select sql_no_cache `tables`.`TABLE_NAME` AS `c` from `information_schema`.`tables` where (`tables`.`TABLE_NAME` = _utf8'v1') NONE NO root@localhost DEFINER
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NULL test v2 select sql_no_cache `columns`.`COLUMN_NAME` AS `c` from `information_schema`.`columns` where (`columns`.`TABLE_NAME` = _utf8'v2') NONE NO root@localhost DEFINER
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NULL test v3 select sql_no_cache `character_sets`.`CHARACTER_SET_NAME` AS `c` from `information_schema`.`character_sets` where (`character_sets`.`CHARACTER_SET_NAME` like _utf8'latin1%') NONE NO root@localhost DEFINER
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NULL test v4 select sql_no_cache `collations`.`COLLATION_NAME` AS `c` from `information_schema`.`collations` where (`collations`.`COLLATION_NAME` like _utf8'latin1%') NONE NO root@localhost DEFINER
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drop view v0, v1, v2, v3, v4;
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create table t1 (a int);
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grant select,update,insert on t1 to mysqltest_1@localhost;
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grant select (a), update (a),insert(a), references(a) on t1 to mysqltest_1@localhost;
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grant all on test.* to mysqltest_1@localhost with grant option;
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select * from information_schema.USER_PRIVILEGES where grantee like '%mysqltest_1%';
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GRANTEE TABLE_CATALOG PRIVILEGE_TYPE IS_GRANTABLE
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'mysqltest_1'@'localhost' NULL USAGE NO
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select * from information_schema.SCHEMA_PRIVILEGES where grantee like '%mysqltest_1%';
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GRANTEE TABLE_CATALOG TABLE_SCHEMA PRIVILEGE_TYPE IS_GRANTABLE
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'mysqltest_1'@'localhost' NULL test SELECT YES
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'mysqltest_1'@'localhost' NULL test INSERT YES
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'mysqltest_1'@'localhost' NULL test UPDATE YES
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'mysqltest_1'@'localhost' NULL test DELETE YES
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'mysqltest_1'@'localhost' NULL test CREATE YES
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'mysqltest_1'@'localhost' NULL test DROP YES
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'mysqltest_1'@'localhost' NULL test REFERENCES YES
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'mysqltest_1'@'localhost' NULL test INDEX YES
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'mysqltest_1'@'localhost' NULL test ALTER YES
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'mysqltest_1'@'localhost' NULL test CREATE TEMPORARY TABLES YES
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'mysqltest_1'@'localhost' NULL test LOCK TABLES YES
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'mysqltest_1'@'localhost' NULL test EXECUTE YES
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'mysqltest_1'@'localhost' NULL test CREATE VIEW YES
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'mysqltest_1'@'localhost' NULL test SHOW VIEW YES
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'mysqltest_1'@'localhost' NULL test CREATE ROUTINE YES
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'mysqltest_1'@'localhost' NULL test ALTER ROUTINE YES
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|
'mysqltest_1'@'localhost' NULL test EVENT YES
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'mysqltest_1'@'localhost' NULL test TRIGGER YES
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select * from information_schema.TABLE_PRIVILEGES where grantee like '%mysqltest_1%';
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GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME PRIVILEGE_TYPE IS_GRANTABLE
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|
'mysqltest_1'@'localhost' NULL test t1 SELECT NO
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'mysqltest_1'@'localhost' NULL test t1 INSERT NO
|
|
'mysqltest_1'@'localhost' NULL test t1 UPDATE NO
|
|
select * from information_schema.COLUMN_PRIVILEGES where grantee like '%mysqltest_1%';
|
|
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME PRIVILEGE_TYPE IS_GRANTABLE
|
|
'mysqltest_1'@'localhost' NULL test t1 a SELECT NO
|
|
'mysqltest_1'@'localhost' NULL test t1 a INSERT NO
|
|
'mysqltest_1'@'localhost' NULL test t1 a UPDATE NO
|
|
'mysqltest_1'@'localhost' NULL test t1 a REFERENCES NO
|
|
delete from mysql.user where user like 'mysqltest%';
|
|
delete from mysql.db where user like 'mysqltest%';
|
|
delete from mysql.tables_priv where user like 'mysqltest%';
|
|
delete from mysql.columns_priv where user like 'mysqltest%';
|
|
flush privileges;
|
|
drop table t1;
|
|
create table t1 (a int null, primary key(a));
|
|
alter table t1 add constraint constraint_1 unique (a);
|
|
alter table t1 add constraint unique key_1(a);
|
|
alter table t1 add constraint constraint_2 unique key_2(a);
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`a` int(11) NOT NULL DEFAULT '0',
|
|
PRIMARY KEY (`a`),
|
|
UNIQUE KEY `constraint_1` (`a`),
|
|
UNIQUE KEY `key_1` (`a`),
|
|
UNIQUE KEY `key_2` (`a`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
select * from information_schema.TABLE_CONSTRAINTS where
|
|
TABLE_SCHEMA= "test";
|
|
CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_SCHEMA TABLE_NAME CONSTRAINT_TYPE
|
|
NULL test PRIMARY test t1 PRIMARY KEY
|
|
NULL test constraint_1 test t1 UNIQUE
|
|
NULL test key_1 test t1 UNIQUE
|
|
NULL test key_2 test t1 UNIQUE
|
|
select * from information_schema.KEY_COLUMN_USAGE where
|
|
TABLE_SCHEMA= "test";
|
|
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
|
|
NULL test PRIMARY NULL test t1 a 1 NULL NULL NULL NULL
|
|
NULL test constraint_1 NULL test t1 a 1 NULL NULL NULL NULL
|
|
NULL test key_1 NULL test t1 a 1 NULL NULL NULL NULL
|
|
NULL test key_2 NULL test t1 a 1 NULL NULL NULL NULL
|
|
select table_name from information_schema.TABLES where table_schema like "test%";
|
|
table_name
|
|
t1
|
|
select table_name,column_name from information_schema.COLUMNS where table_schema like "test%";
|
|
table_name column_name
|
|
t1 a
|
|
select ROUTINE_NAME from information_schema.ROUTINES;
|
|
ROUTINE_NAME
|
|
sel2
|
|
sub1
|
|
delete from mysql.user where user='mysqltest_1';
|
|
drop table t1;
|
|
drop procedure sel2;
|
|
drop function sub1;
|
|
create table t1(a int);
|
|
create view v1 (c) as select a from t1 with check option;
|
|
create view v2 (c) as select a from t1 WITH LOCAL CHECK OPTION;
|
|
create view v3 (c) as select a from t1 WITH CASCADED CHECK OPTION;
|
|
select * from information_schema.views;
|
|
TABLE_CATALOG TABLE_SCHEMA TABLE_NAME VIEW_DEFINITION CHECK_OPTION IS_UPDATABLE DEFINER SECURITY_TYPE
|
|
NULL test v1 select `test`.`t1`.`a` AS `c` from `test`.`t1` CASCADED YES root@localhost DEFINER
|
|
NULL test v2 select `test`.`t1`.`a` AS `c` from `test`.`t1` LOCAL YES root@localhost DEFINER
|
|
NULL test v3 select `test`.`t1`.`a` AS `c` from `test`.`t1` CASCADED YES root@localhost DEFINER
|
|
grant select (a) on test.t1 to joe@localhost with grant option;
|
|
select * from INFORMATION_SCHEMA.COLUMN_PRIVILEGES;
|
|
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME PRIVILEGE_TYPE IS_GRANTABLE
|
|
'joe'@'localhost' NULL test t1 a SELECT YES
|
|
select * from INFORMATION_SCHEMA.TABLE_PRIVILEGES;
|
|
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME PRIVILEGE_TYPE IS_GRANTABLE
|
|
drop view v1, v2, v3;
|
|
drop table t1;
|
|
delete from mysql.user where user='joe';
|
|
delete from mysql.db where user='joe';
|
|
delete from mysql.tables_priv where user='joe';
|
|
delete from mysql.columns_priv where user='joe';
|
|
flush privileges;
|
|
create table t1 (a int not null auto_increment,b int, primary key (a));
|
|
insert into t1 values (1,1),(NULL,3),(NULL,4);
|
|
select AUTO_INCREMENT from information_schema.tables where table_name = 't1';
|
|
AUTO_INCREMENT
|
|
4
|
|
drop table t1;
|
|
create table t1 (s1 int);
|
|
insert into t1 values (0),(9),(0);
|
|
select s1 from t1 where s1 in (select version from
|
|
information_schema.tables) union select version from
|
|
information_schema.tables;
|
|
s1
|
|
10
|
|
drop table t1;
|
|
SHOW CREATE TABLE INFORMATION_SCHEMA.character_sets;
|
|
Table Create Table
|
|
CHARACTER_SETS CREATE TEMPORARY TABLE `CHARACTER_SETS` (
|
|
`CHARACTER_SET_NAME` varchar(64) NOT NULL DEFAULT '',
|
|
`DEFAULT_COLLATE_NAME` varchar(64) NOT NULL DEFAULT '',
|
|
`DESCRIPTION` varchar(60) NOT NULL DEFAULT '',
|
|
`MAXLEN` bigint(3) NOT NULL DEFAULT '0'
|
|
) ENGINE=MEMORY DEFAULT CHARSET=utf8
|
|
set names latin2;
|
|
SHOW CREATE TABLE INFORMATION_SCHEMA.character_sets;
|
|
Table Create Table
|
|
CHARACTER_SETS CREATE TEMPORARY TABLE `CHARACTER_SETS` (
|
|
`CHARACTER_SET_NAME` varchar(64) NOT NULL DEFAULT '',
|
|
`DEFAULT_COLLATE_NAME` varchar(64) NOT NULL DEFAULT '',
|
|
`DESCRIPTION` varchar(60) NOT NULL DEFAULT '',
|
|
`MAXLEN` bigint(3) NOT NULL DEFAULT '0'
|
|
) ENGINE=MEMORY DEFAULT CHARSET=utf8
|
|
set names latin1;
|
|
create table t1 select * from information_schema.CHARACTER_SETS
|
|
where CHARACTER_SET_NAME like "latin1";
|
|
select * from t1;
|
|
CHARACTER_SET_NAME DEFAULT_COLLATE_NAME DESCRIPTION MAXLEN
|
|
latin1 latin1_swedish_ci cp1252 West European 1
|
|
alter table t1 default character set utf8;
|
|
show create table t1;
|
|
Table Create Table
|
|
t1 CREATE TABLE `t1` (
|
|
`CHARACTER_SET_NAME` varchar(64) NOT NULL DEFAULT '',
|
|
`DEFAULT_COLLATE_NAME` varchar(64) NOT NULL DEFAULT '',
|
|
`DESCRIPTION` varchar(60) NOT NULL DEFAULT '',
|
|
`MAXLEN` bigint(3) NOT NULL DEFAULT '0'
|
|
) ENGINE=MyISAM DEFAULT CHARSET=utf8
|
|
drop table t1;
|
|
create view v1 as select * from information_schema.TABLES;
|
|
drop view v1;
|
|
create table t1(a NUMERIC(5,3), b NUMERIC(5,1), c float(5,2),
|
|
d NUMERIC(6,4), e float, f DECIMAL(6,3), g int(11), h DOUBLE(10,3),
|
|
i DOUBLE);
|
|
select COLUMN_NAME,COLUMN_TYPE, CHARACTER_MAXIMUM_LENGTH,
|
|
CHARACTER_OCTET_LENGTH, NUMERIC_PRECISION, NUMERIC_SCALE
|
|
from information_schema.columns where table_name= 't1';
|
|
COLUMN_NAME COLUMN_TYPE CHARACTER_MAXIMUM_LENGTH CHARACTER_OCTET_LENGTH NUMERIC_PRECISION NUMERIC_SCALE
|
|
a decimal(5,3) NULL NULL 5 3
|
|
b decimal(5,1) NULL NULL 5 1
|
|
c float(5,2) NULL NULL 5 2
|
|
d decimal(6,4) NULL NULL 6 4
|
|
e float NULL NULL 12 NULL
|
|
f decimal(6,3) NULL NULL 6 3
|
|
g int(11) NULL NULL 10 0
|
|
h double(10,3) NULL NULL 10 3
|
|
i double NULL NULL 22 NULL
|
|
drop table t1;
|
|
create table t115 as select table_name, column_name, column_type
|
|
from information_schema.columns where table_name = 'proc';
|
|
select * from t115;
|
|
table_name column_name column_type
|
|
proc db char(64)
|
|
proc name char(64)
|
|
proc type enum('FUNCTION','PROCEDURE')
|
|
proc specific_name char(64)
|
|
proc language enum('SQL')
|
|
proc sql_data_access enum('CONTAINS_SQL','NO_SQL','READS_SQL_DATA','MODIFIES_SQL_DATA')
|
|
proc is_deterministic enum('YES','NO')
|
|
proc security_type enum('INVOKER','DEFINER')
|
|
proc param_list blob
|
|
proc returns char(64)
|
|
proc body longblob
|
|
proc definer char(77)
|
|
proc created timestamp
|
|
proc modified timestamp
|
|
proc sql_mode set('REAL_AS_FLOAT','PIPES_AS_CONCAT','ANSI_QUOTES','IGNORE_SPACE','NOT_USED','ONLY_FULL_GROUP_BY','NO_UNSIGNED_SUBTRACTION','NO_DIR_IN_CREATE','POSTGRESQL','ORACLE','MSSQL','DB2','MAXDB','NO_KEY_OPTIONS','NO_TABLE_OPTIONS','NO_FIELD_OPTIONS','MYSQL323','MYSQL40','ANSI','NO_AUTO_VALUE_ON_ZERO','NO_BACKSLASH_ESCAPES','STRICT_TRANS_TABLES','STRICT_ALL_TABLES','NO_ZERO_IN_DATE','NO_ZERO_DATE','INVALID_DATES','ERROR_FOR_DIVISION_BY_ZERO','TRADITIONAL','NO_AUTO_CREATE_USER','HIGH_NOT_PRECEDENCE')
|
|
proc comment char(64)
|
|
drop table t115;
|
|
create procedure p108 () begin declare c cursor for select data_type
|
|
from information_schema.columns; open c; open c; end;//
|
|
call p108()//
|
|
ERROR 24000: Cursor is already open
|
|
drop procedure p108;
|
|
create view v1 as select A1.table_name from information_schema.TABLES A1
|
|
where table_name= "user";
|
|
select * from v1;
|
|
table_name
|
|
user
|
|
drop view v1;
|
|
create view vo as select 'a' union select 'a';
|
|
show index from vo;
|
|
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment
|
|
select * from information_schema.TABLE_CONSTRAINTS where
|
|
TABLE_NAME= "vo";
|
|
CONSTRAINT_CATALOG CONSTRAINT_SCHEMA CONSTRAINT_NAME TABLE_SCHEMA TABLE_NAME CONSTRAINT_TYPE
|
|
select * from information_schema.KEY_COLUMN_USAGE where
|
|
TABLE_NAME= "vo";
|
|
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
|
|
drop view vo;
|
|
select TABLE_NAME,TABLE_TYPE,ENGINE
|
|
from information_schema.tables
|
|
where table_schema='information_schema' limit 2;
|
|
TABLE_NAME TABLE_TYPE ENGINE
|
|
CHARACTER_SETS SYSTEM VIEW MEMORY
|
|
COLLATIONS SYSTEM VIEW MEMORY
|
|
show tables from information_schema like "T%";
|
|
Tables_in_information_schema (T%)
|
|
TABLES
|
|
TABLE_CONSTRAINTS
|
|
TABLE_PRIVILEGES
|
|
TRIGGERS
|
|
create database information_schema;
|
|
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
|
|
use information_schema;
|
|
show full tables like "T%";
|
|
Tables_in_information_schema (T%) Table_type
|
|
TABLES SYSTEM VIEW
|
|
TABLE_CONSTRAINTS SYSTEM VIEW
|
|
TABLE_PRIVILEGES SYSTEM VIEW
|
|
TRIGGERS SYSTEM VIEW
|
|
create table t1(a int);
|
|
ERROR 42S02: Unknown table 't1' in information_schema
|
|
use test;
|
|
show tables;
|
|
Tables_in_test
|
|
use information_schema;
|
|
show tables like "T%";
|
|
Tables_in_information_schema (T%)
|
|
TABLES
|
|
TABLE_CONSTRAINTS
|
|
TABLE_PRIVILEGES
|
|
TRIGGERS
|
|
select table_name from tables where table_name='user';
|
|
table_name
|
|
user
|
|
select column_name, privileges from columns
|
|
where table_name='user' and column_name like '%o%';
|
|
column_name privileges
|
|
Host select,insert,update,references
|
|
Password select,insert,update,references
|
|
Drop_priv select,insert,update,references
|
|
Reload_priv select,insert,update,references
|
|
Shutdown_priv select,insert,update,references
|
|
Process_priv select,insert,update,references
|
|
Show_db_priv select,insert,update,references
|
|
Lock_tables_priv select,insert,update,references
|
|
Show_view_priv select,insert,update,references
|
|
Create_routine_priv select,insert,update,references
|
|
Alter_routine_priv select,insert,update,references
|
|
max_questions select,insert,update,references
|
|
max_connections select,insert,update,references
|
|
max_user_connections select,insert,update,references
|
|
use test;
|
|
create function sub1(i int) returns int
|
|
return i+1;
|
|
create table t1(f1 int);
|
|
create view v2 (c) as select f1 from t1;
|
|
create view v3 (c) as select sub1(1);
|
|
create table t4(f1 int, KEY f1_key (f1));
|
|
drop table t1;
|
|
drop function sub1;
|
|
select table_name from information_schema.views
|
|
where table_schema='test';
|
|
table_name
|
|
v2
|
|
v3
|
|
Warnings:
|
|
Warning 1356 View 'test.v2' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
|
|
Warning 1356 View 'test.v3' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
|
|
select table_name from information_schema.views
|
|
where table_schema='test';
|
|
table_name
|
|
v2
|
|
v3
|
|
Warnings:
|
|
Warning 1356 View 'test.v2' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
|
|
Warning 1356 View 'test.v3' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
|
|
select column_name from information_schema.columns
|
|
where table_schema='test';
|
|
column_name
|
|
f1
|
|
Warnings:
|
|
Warning 1356 View 'test.v2' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
|
|
Warning 1356 View 'test.v3' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
|
|
select index_name from information_schema.statistics where table_schema='test';
|
|
index_name
|
|
f1_key
|
|
select constraint_name from information_schema.table_constraints
|
|
where table_schema='test';
|
|
constraint_name
|
|
show create view v2;
|
|
View Create View
|
|
v2 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v2` AS select `test`.`t1`.`f1` AS `c` from `t1`
|
|
Warnings:
|
|
Warning 1356 View 'test.v2' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
|
|
show create table v3;
|
|
View Create View
|
|
v3 CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v3` AS select sql_no_cache `test`.`sub1`(1) AS `c`
|
|
Warnings:
|
|
Warning 1356 View 'test.v3' references invalid table(s) or column(s) or function(s) or definer/invoker of view lack rights to use them
|
|
drop view v2;
|
|
drop view v3;
|
|
drop table t4;
|
|
select * from information_schema.table_names;
|
|
ERROR 42S02: Unknown table 'table_names' in information_schema
|
|
select column_type from information_schema.columns
|
|
where table_schema="information_schema" and table_name="COLUMNS" and
|
|
(column_name="character_set_name" or column_name="collation_name");
|
|
column_type
|
|
varchar(64)
|
|
varchar(64)
|
|
select TABLE_ROWS from information_schema.tables where
|
|
table_schema="information_schema" and table_name="COLUMNS";
|
|
TABLE_ROWS
|
|
NULL
|
|
select table_type from information_schema.tables
|
|
where table_schema="mysql" and table_name="user";
|
|
table_type
|
|
BASE TABLE
|
|
show open tables where `table` like "user";
|
|
Database Table In_use Name_locked
|
|
mysql user 0 0
|
|
show status where variable_name like "%database%";
|
|
Variable_name Value
|
|
Com_show_databases 3
|
|
show variables where variable_name like "skip_show_databas";
|
|
Variable_name Value
|
|
show global status like "Threads_running";
|
|
Variable_name Value
|
|
Threads_running #
|
|
create table t1(f1 int);
|
|
create table t2(f2 int);
|
|
create view v1 as select * from t1, t2;
|
|
set @got_val= (select count(*) from information_schema.columns);
|
|
drop view v1;
|
|
drop table t1, t2;
|
|
CREATE TABLE t_crashme ( f1 BIGINT);
|
|
CREATE VIEW a1 (t_CRASHME) AS SELECT f1 FROM t_crashme GROUP BY f1;
|
|
CREATE VIEW a2 AS SELECT t_CRASHME FROM a1;
|
|
count(*)
|
|
113
|
|
drop view a2, a1;
|
|
drop table t_crashme;
|
|
select table_schema,table_name, column_name from
|
|
information_schema.columns
|
|
where data_type = 'longtext';
|
|
table_schema table_name column_name
|
|
information_schema COLUMNS COLUMN_TYPE
|
|
information_schema EVENTS EVENT_BODY
|
|
information_schema EVENTS SQL_MODE
|
|
information_schema PARTITIONS PARTITION_EXPRESSION
|
|
information_schema PARTITIONS SUBPARTITION_EXPRESSION
|
|
information_schema PARTITIONS PARTITION_DESCRIPTION
|
|
information_schema PLUGINS PLUGIN_DESCRIPTION
|
|
information_schema PROCESSLIST INFO
|
|
information_schema ROUTINES ROUTINE_DEFINITION
|
|
information_schema ROUTINES SQL_MODE
|
|
information_schema TRIGGERS ACTION_CONDITION
|
|
information_schema TRIGGERS ACTION_STATEMENT
|
|
information_schema TRIGGERS SQL_MODE
|
|
information_schema TRIGGERS DEFINER
|
|
information_schema VIEWS VIEW_DEFINITION
|
|
select table_name, column_name, data_type from information_schema.columns
|
|
where data_type = 'datetime';
|
|
table_name column_name data_type
|
|
EVENTS EXECUTE_AT datetime
|
|
EVENTS STARTS datetime
|
|
EVENTS ENDS datetime
|
|
EVENTS CREATED datetime
|
|
EVENTS LAST_ALTERED datetime
|
|
EVENTS LAST_EXECUTED datetime
|
|
FILES CREATION_TIME datetime
|
|
FILES LAST_UPDATE_TIME datetime
|
|
FILES LAST_ACCESS_TIME datetime
|
|
FILES CREATE_TIME datetime
|
|
FILES UPDATE_TIME datetime
|
|
FILES CHECK_TIME datetime
|
|
PARTITIONS CREATE_TIME datetime
|
|
PARTITIONS UPDATE_TIME datetime
|
|
PARTITIONS CHECK_TIME datetime
|
|
ROUTINES CREATED datetime
|
|
ROUTINES LAST_ALTERED datetime
|
|
TABLES CREATE_TIME datetime
|
|
TABLES UPDATE_TIME datetime
|
|
TABLES CHECK_TIME datetime
|
|
TRIGGERS CREATED datetime
|
|
event execute_at datetime
|
|
event last_executed datetime
|
|
event starts datetime
|
|
event ends datetime
|
|
SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES A
|
|
WHERE NOT EXISTS
|
|
(SELECT * FROM INFORMATION_SCHEMA.COLUMNS B
|
|
WHERE A.TABLE_SCHEMA = B.TABLE_SCHEMA
|
|
AND A.TABLE_NAME = B.TABLE_NAME);
|
|
COUNT(*)
|
|
0
|
|
create table t1
|
|
( x_bigint BIGINT,
|
|
x_integer INTEGER,
|
|
x_smallint SMALLINT,
|
|
x_decimal DECIMAL(5,3),
|
|
x_numeric NUMERIC(5,3),
|
|
x_real REAL,
|
|
x_float FLOAT,
|
|
x_double_precision DOUBLE PRECISION );
|
|
SELECT COLUMN_NAME, CHARACTER_MAXIMUM_LENGTH, CHARACTER_OCTET_LENGTH
|
|
FROM INFORMATION_SCHEMA.COLUMNS
|
|
WHERE TABLE_NAME= 't1';
|
|
COLUMN_NAME CHARACTER_MAXIMUM_LENGTH CHARACTER_OCTET_LENGTH
|
|
x_bigint NULL NULL
|
|
x_integer NULL NULL
|
|
x_smallint NULL NULL
|
|
x_decimal NULL NULL
|
|
x_numeric NULL NULL
|
|
x_real NULL NULL
|
|
x_float NULL NULL
|
|
x_double_precision NULL NULL
|
|
drop table t1;
|
|
grant select on test.* to mysqltest_4@localhost;
|
|
SELECT TABLE_NAME, COLUMN_NAME, PRIVILEGES FROM INFORMATION_SCHEMA.COLUMNS
|
|
where COLUMN_NAME='TABLE_NAME';
|
|
TABLE_NAME COLUMN_NAME PRIVILEGES
|
|
COLUMNS TABLE_NAME select
|
|
COLUMN_PRIVILEGES TABLE_NAME select
|
|
FILES TABLE_NAME select
|
|
KEY_COLUMN_USAGE TABLE_NAME select
|
|
PARTITIONS TABLE_NAME select
|
|
REFERENTIAL_CONSTRAINTS TABLE_NAME select
|
|
STATISTICS TABLE_NAME select
|
|
TABLES TABLE_NAME select
|
|
TABLE_CONSTRAINTS TABLE_NAME select
|
|
TABLE_PRIVILEGES TABLE_NAME select
|
|
VIEWS TABLE_NAME select
|
|
delete from mysql.user where user='mysqltest_4';
|
|
delete from mysql.db where user='mysqltest_4';
|
|
flush privileges;
|
|
SELECT table_schema, count(*) FROM information_schema.TABLES GROUP BY TABLE_SCHEMA;
|
|
table_schema count(*)
|
|
cluster 1
|
|
information_schema 23
|
|
mysql 21
|
|
create table t1 (i int, j int);
|
|
create trigger trg1 before insert on t1 for each row
|
|
begin
|
|
if new.j > 10 then
|
|
set new.j := 10;
|
|
end if;
|
|
end|
|
|
create trigger trg2 before update on t1 for each row
|
|
begin
|
|
if old.i % 2 = 0 then
|
|
set new.j := -1;
|
|
end if;
|
|
end|
|
|
create trigger trg3 after update on t1 for each row
|
|
begin
|
|
if new.j = -1 then
|
|
set @fired:= "Yes";
|
|
end if;
|
|
end|
|
|
show triggers;
|
|
Trigger Event Table Statement Timing Created sql_mode Definer
|
|
trg1 INSERT t1 begin
|
|
if new.j > 10 then
|
|
set new.j := 10;
|
|
end if;
|
|
end BEFORE NULL root@localhost
|
|
trg2 UPDATE t1 begin
|
|
if old.i % 2 = 0 then
|
|
set new.j := -1;
|
|
end if;
|
|
end BEFORE NULL root@localhost
|
|
trg3 UPDATE t1 begin
|
|
if new.j = -1 then
|
|
set @fired:= "Yes";
|
|
end if;
|
|
end AFTER NULL root@localhost
|
|
select * from information_schema.triggers;
|
|
TRIGGER_CATALOG TRIGGER_SCHEMA TRIGGER_NAME EVENT_MANIPULATION EVENT_OBJECT_CATALOG EVENT_OBJECT_SCHEMA EVENT_OBJECT_TABLE ACTION_ORDER ACTION_CONDITION ACTION_STATEMENT ACTION_ORIENTATION ACTION_TIMING ACTION_REFERENCE_OLD_TABLE ACTION_REFERENCE_NEW_TABLE ACTION_REFERENCE_OLD_ROW ACTION_REFERENCE_NEW_ROW CREATED SQL_MODE DEFINER
|
|
NULL test trg1 INSERT NULL test t1 0 NULL begin
|
|
if new.j > 10 then
|
|
set new.j := 10;
|
|
end if;
|
|
end ROW BEFORE NULL NULL OLD NEW NULL root@localhost
|
|
NULL test trg2 UPDATE NULL test t1 0 NULL begin
|
|
if old.i % 2 = 0 then
|
|
set new.j := -1;
|
|
end if;
|
|
end ROW BEFORE NULL NULL OLD NEW NULL root@localhost
|
|
NULL test trg3 UPDATE NULL test t1 0 NULL begin
|
|
if new.j = -1 then
|
|
set @fired:= "Yes";
|
|
end if;
|
|
end ROW AFTER NULL NULL OLD NEW NULL root@localhost
|
|
drop trigger trg1;
|
|
drop trigger trg2;
|
|
drop trigger trg3;
|
|
drop table t1;
|
|
create database mysqltest;
|
|
create table mysqltest.t1 (f1 int, f2 int);
|
|
create table mysqltest.t2 (f1 int);
|
|
grant select (f1) on mysqltest.t1 to user1@localhost;
|
|
grant select on mysqltest.t2 to user2@localhost;
|
|
grant select on mysqltest.* to user3@localhost;
|
|
grant select on *.* to user4@localhost;
|
|
select * from information_schema.column_privileges;
|
|
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME PRIVILEGE_TYPE IS_GRANTABLE
|
|
'user1'@'localhost' NULL mysqltest t1 f1 SELECT NO
|
|
select * from information_schema.table_privileges;
|
|
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME PRIVILEGE_TYPE IS_GRANTABLE
|
|
select * from information_schema.schema_privileges;
|
|
GRANTEE TABLE_CATALOG TABLE_SCHEMA PRIVILEGE_TYPE IS_GRANTABLE
|
|
select * from information_schema.user_privileges;
|
|
GRANTEE TABLE_CATALOG PRIVILEGE_TYPE IS_GRANTABLE
|
|
'user1'@'localhost' NULL USAGE NO
|
|
show grants;
|
|
Grants for user1@localhost
|
|
GRANT USAGE ON *.* TO 'user1'@'localhost'
|
|
GRANT SELECT (f1) ON `mysqltest`.`t1` TO 'user1'@'localhost'
|
|
select * from information_schema.column_privileges;
|
|
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME PRIVILEGE_TYPE IS_GRANTABLE
|
|
select * from information_schema.table_privileges;
|
|
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME PRIVILEGE_TYPE IS_GRANTABLE
|
|
'user2'@'localhost' NULL mysqltest t2 SELECT NO
|
|
select * from information_schema.schema_privileges;
|
|
GRANTEE TABLE_CATALOG TABLE_SCHEMA PRIVILEGE_TYPE IS_GRANTABLE
|
|
select * from information_schema.user_privileges;
|
|
GRANTEE TABLE_CATALOG PRIVILEGE_TYPE IS_GRANTABLE
|
|
'user2'@'localhost' NULL USAGE NO
|
|
show grants;
|
|
Grants for user2@localhost
|
|
GRANT USAGE ON *.* TO 'user2'@'localhost'
|
|
GRANT SELECT ON `mysqltest`.`t2` TO 'user2'@'localhost'
|
|
select * from information_schema.column_privileges;
|
|
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME PRIVILEGE_TYPE IS_GRANTABLE
|
|
select * from information_schema.table_privileges;
|
|
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME PRIVILEGE_TYPE IS_GRANTABLE
|
|
select * from information_schema.schema_privileges;
|
|
GRANTEE TABLE_CATALOG TABLE_SCHEMA PRIVILEGE_TYPE IS_GRANTABLE
|
|
'user3'@'localhost' NULL mysqltest SELECT NO
|
|
select * from information_schema.user_privileges;
|
|
GRANTEE TABLE_CATALOG PRIVILEGE_TYPE IS_GRANTABLE
|
|
'user3'@'localhost' NULL USAGE NO
|
|
show grants;
|
|
Grants for user3@localhost
|
|
GRANT USAGE ON *.* TO 'user3'@'localhost'
|
|
GRANT SELECT ON `mysqltest`.* TO 'user3'@'localhost'
|
|
select * from information_schema.column_privileges where grantee like '%user%';
|
|
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME COLUMN_NAME PRIVILEGE_TYPE IS_GRANTABLE
|
|
'user1'@'localhost' NULL mysqltest t1 f1 SELECT NO
|
|
select * from information_schema.table_privileges where grantee like '%user%';
|
|
GRANTEE TABLE_CATALOG TABLE_SCHEMA TABLE_NAME PRIVILEGE_TYPE IS_GRANTABLE
|
|
'user2'@'localhost' NULL mysqltest t2 SELECT NO
|
|
select * from information_schema.schema_privileges where grantee like '%user%';
|
|
GRANTEE TABLE_CATALOG TABLE_SCHEMA PRIVILEGE_TYPE IS_GRANTABLE
|
|
'user3'@'localhost' NULL mysqltest SELECT NO
|
|
select * from information_schema.user_privileges where grantee like '%user%';
|
|
GRANTEE TABLE_CATALOG PRIVILEGE_TYPE IS_GRANTABLE
|
|
'user1'@'localhost' NULL USAGE NO
|
|
'user2'@'localhost' NULL USAGE NO
|
|
'user3'@'localhost' NULL USAGE NO
|
|
'user4'@'localhost' NULL SELECT NO
|
|
show grants;
|
|
Grants for user4@localhost
|
|
GRANT SELECT ON *.* TO 'user4'@'localhost'
|
|
drop user user1@localhost, user2@localhost, user3@localhost, user4@localhost;
|
|
use test;
|
|
drop database mysqltest;
|
|
drop procedure if exists p1;
|
|
drop procedure if exists p2;
|
|
create procedure p1 () modifies sql data set @a = 5;
|
|
create procedure p2 () set @a = 5;
|
|
select sql_data_access from information_schema.routines
|
|
where specific_name like 'p%';
|
|
sql_data_access
|
|
MODIFIES SQL DATA
|
|
CONTAINS SQL
|
|
drop procedure p1;
|
|
drop procedure p2;
|
|
show create database information_schema;
|
|
Database Create Database
|
|
information_schema CREATE DATABASE `information_schema` /*!40100 DEFAULT CHARACTER SET utf8 */
|
|
create table t1(f1 LONGBLOB, f2 LONGTEXT);
|
|
select column_name,data_type,CHARACTER_OCTET_LENGTH,
|
|
CHARACTER_MAXIMUM_LENGTH
|
|
from information_schema.columns
|
|
where table_name='t1';
|
|
column_name data_type CHARACTER_OCTET_LENGTH CHARACTER_MAXIMUM_LENGTH
|
|
f1 longblob 4294967295 4294967295
|
|
f2 longtext 4294967295 4294967295
|
|
drop table t1;
|
|
create table t1(f1 tinyint, f2 SMALLINT, f3 mediumint, f4 int,
|
|
f5 BIGINT, f6 BIT, f7 bit(64));
|
|
select column_name, NUMERIC_PRECISION, NUMERIC_SCALE
|
|
from information_schema.columns
|
|
where table_name='t1';
|
|
column_name NUMERIC_PRECISION NUMERIC_SCALE
|
|
f1 3 0
|
|
f2 5 0
|
|
f3 7 0
|
|
f4 10 0
|
|
f5 19 0
|
|
f6 1 NULL
|
|
f7 64 NULL
|
|
drop table t1;
|
|
create table t1 (f1 integer);
|
|
create trigger tr1 after insert on t1 for each row set @test_var=42;
|
|
use information_schema;
|
|
select trigger_schema, trigger_name from triggers where
|
|
trigger_name='tr1';
|
|
trigger_schema trigger_name
|
|
test tr1
|
|
use test;
|
|
drop table t1;
|
|
create table t1 (a int not null, b int);
|
|
use information_schema;
|
|
select column_name, column_default from columns
|
|
where table_schema='test' and table_name='t1';
|
|
column_name column_default
|
|
a NULL
|
|
b NULL
|
|
use test;
|
|
show columns from t1;
|
|
Field Type Null Key Default Extra
|
|
a int(11) NO
|
|
b int(11) YES NULL
|
|
drop table t1;
|
|
CREATE TABLE t1 (a int);
|
|
CREATE TABLE t2 (b int);
|
|
SHOW TABLE STATUS FROM test
|
|
WHERE name IN ( SELECT TABLE_NAME FROM INFORMATION_SCHEMA.TABLES
|
|
WHERE TABLE_SCHEMA='test' AND TABLE_TYPE='BASE TABLE');
|
|
Name Engine Version Row_format Rows Avg_row_length Data_length Max_data_length Index_length Data_free Auto_increment Create_time Update_time Check_time Collation Checksum Create_options Comment
|
|
t1 MyISAM 10 Fixed 0 0 0 # 1024 0 NULL # # NULL latin1_swedish_ci NULL
|
|
t2 MyISAM 10 Fixed 0 0 0 # 1024 0 NULL # # NULL latin1_swedish_ci NULL
|
|
DROP TABLE t1,t2;
|
|
create table t1(f1 int);
|
|
create view v1 (c) as select f1 from t1;
|
|
select database();
|
|
database()
|
|
NULL
|
|
show fields from test.v1;
|
|
Field Type Null Key Default Extra
|
|
c int(11) YES NULL
|
|
drop view v1;
|
|
drop table t1;
|
|
alter database information_schema;
|
|
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
|
|
drop database information_schema;
|
|
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
|
|
drop table information_schema.tables;
|
|
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
|
|
alter table information_schema.tables;
|
|
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
|
|
use information_schema;
|
|
create temporary table schemata(f1 char(10));
|
|
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
|
|
CREATE PROCEDURE p1 ()
|
|
BEGIN
|
|
SELECT 'foo' FROM DUAL;
|
|
END |
|
|
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
|
|
select ROUTINE_NAME from routines;
|
|
ROUTINE_NAME
|
|
grant all on information_schema.* to 'user1'@'localhost';
|
|
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
|
|
grant select on information_schema.* to 'user1'@'localhost';
|
|
ERROR 42000: Access denied for user 'root'@'localhost' to database 'information_schema'
|
|
use test;
|
|
create table t1(id int);
|
|
insert into t1(id) values (1);
|
|
select 1 from (select 1 from test.t1) a;
|
|
1
|
|
1
|
|
use information_schema;
|
|
select 1 from (select 1 from test.t1) a;
|
|
1
|
|
1
|
|
use test;
|
|
drop table t1;
|
|
create table t1 (f1 int(11));
|
|
create view v1 as select * from t1;
|
|
drop table t1;
|
|
select table_type from information_schema.tables
|
|
where table_name="v1";
|
|
table_type
|
|
VIEW
|
|
drop view v1;
|
|
create temporary table t1(f1 int, index(f1));
|
|
show columns from t1;
|
|
Field Type Null Key Default Extra
|
|
f1 int(11) YES MUL NULL
|
|
describe t1;
|
|
Field Type Null Key Default Extra
|
|
f1 int(11) YES MUL NULL
|
|
show indexes from t1;
|
|
Table Non_unique Key_name Seq_in_index Column_name Collation Cardinality Sub_part Packed Null Index_type Comment
|
|
t1 1 f1 1 f1 A NULL NULL NULL YES BTREE
|
|
drop table t1;
|
|
create table t1(f1 binary(32), f2 varbinary(64));
|
|
select character_maximum_length, character_octet_length
|
|
from information_schema.columns where table_name='t1';
|
|
character_maximum_length character_octet_length
|
|
32 32
|
|
64 64
|
|
drop table t1;
|
|
CREATE TABLE t1 (f1 BIGINT, f2 VARCHAR(20), f3 BIGINT);
|
|
INSERT INTO t1 SET f1 = 1, f2 = 'Schoenenbourg', f3 = 1;
|
|
CREATE FUNCTION func2() RETURNS BIGINT RETURN 1;
|
|
CREATE FUNCTION func1() RETURNS BIGINT
|
|
BEGIN
|
|
RETURN ( SELECT COUNT(*) FROM INFORMATION_SCHEMA.VIEWS);
|
|
END//
|
|
CREATE VIEW v1 AS SELECT 1 FROM t1
|
|
WHERE f3 = (SELECT func2 ());
|
|
SELECT func1();
|
|
func1()
|
|
1
|
|
DROP TABLE t1;
|
|
DROP VIEW v1;
|
|
DROP FUNCTION func1;
|
|
DROP FUNCTION func2;
|
|
select column_type, group_concat(table_schema, '.', table_name), count(*) as num
|
|
from information_schema.columns where
|
|
table_schema='information_schema' and
|
|
(column_type = 'varchar(7)' or column_type = 'varchar(20)')
|
|
group by column_type order by num;
|
|
column_type group_concat(table_schema, '.', table_name) num
|
|
varchar(7) information_schema.ROUTINES,information_schema.VIEWS 2
|
|
varchar(20) information_schema.COLUMNS,information_schema.FILES,information_schema.FILES,information_schema.PLUGINS,information_schema.PLUGINS,information_schema.PLUGINS 6
|
|
create table t1(f1 char(1) not null, f2 char(9) not null)
|
|
default character set utf8;
|
|
select CHARACTER_MAXIMUM_LENGTH, CHARACTER_OCTET_LENGTH from
|
|
information_schema.columns where table_schema='test' and table_name = 't1';
|
|
CHARACTER_MAXIMUM_LENGTH CHARACTER_OCTET_LENGTH
|
|
1 3
|
|
9 27
|
|
drop table t1;
|
|
use mysql;
|
|
INSERT INTO `proc` VALUES ('test','','PROCEDURE','','SQL','CONTAINS_SQL',
|
|
'NO','DEFINER','','','BEGIN\r\n \r\nEND','root@%','2006-03-02 18:40:03',
|
|
'2006-03-02 18:40:03','','');
|
|
select routine_name from information_schema.routines;
|
|
routine_name
|
|
|
|
delete from proc where name='';
|
|
use test;
|
|
select * from information_schema.engines WHERE ENGINE="MyISAM";
|
|
ENGINE SUPPORT COMMENT TRANSACTIONS XA SAVEPOINTS
|
|
MyISAM ENABLED Default engine as of MySQL 3.23 with great performance NO NO NO
|
|
grant select on *.* to user3148@localhost;
|
|
select user,db from information_schema.processlist;
|
|
user db
|
|
user3148 test
|
|
drop user user3148@localhost;
|