content_image/763159.jpg content_image/763163.jpg
<img src='content_image/763159.jpg'>

The ":: xxx "  values are symbolic pseudo-constants that may be given instead of the literal numeric values. They must be quoted as strings and are case-sensitive. 

A general event indicates the status code of an operation and its details. Table 6.32, “General Event Fields”  indicates the permitted fields for general events. 

<img src='content_image/763163.jpg'>

general_command.str  indicates a command name: Query , Execute , Quit , or Change user . 

A general event with the general_command.str  field set to Query  or Execute  contains general_sql_command.str  set to a value that specifies the type of SQL command: alter_db , alter_db_upgrade , admin_commands , and so forth. These values can be seen as the last components of the Performance Schema instruments displayed by this statement: 

mysql> SELECT NAME FROM performance_schema.setup_instruments 

