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528abc749e
Improve documentation of performance_schema tables by appending COLUMN comments to tables. Additionally improve test coverage and update corresponding tests.
36 lines
1.5 KiB
Plaintext
36 lines
1.5 KiB
Plaintext
select * from performance_schema.users
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limit 1;
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select * from performance_schema.users
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where user='FOO';
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insert into performance_schema.users
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set user='FOO',
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current_connections=1, total_connections=2;
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ERROR 42000: INSERT command denied to user 'root'@'localhost' for table 'users'
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update performance_schema.users
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set current_connections=12;
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ERROR 42000: UPDATE command denied to user 'root'@'localhost' for table 'users'
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update performance_schema.users
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set current_connections=12 where user like "FOO";
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ERROR 42000: UPDATE command denied to user 'root'@'localhost' for table 'users'
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delete from performance_schema.users
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where total_connections=1;
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ERROR 42000: DELETE command denied to user 'root'@'localhost' for table 'users'
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delete from performance_schema.users;
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ERROR 42000: DELETE command denied to user 'root'@'localhost' for table 'users'
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LOCK TABLES performance_schema.users READ;
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ERROR 42000: SELECT, LOCK TABLES command denied to user 'root'@'localhost' for table 'users'
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UNLOCK TABLES;
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LOCK TABLES performance_schema.users WRITE;
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ERROR 42000: SELECT, LOCK TABLES command denied to user 'root'@'localhost' for table 'users'
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UNLOCK TABLES;
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#
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# MDEV-25325 column_comment for performance_schema tables
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#
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select column_name, column_comment
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from information_schema.columns
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where table_schema='performance_schema' and table_name='users';
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column_name column_comment
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USER The connection's client user name for the connection, or NULL if an internal thread.
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CURRENT_CONNECTIONS Current connections for the user.
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TOTAL_CONNECTIONS Total connections for the user.
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