
 Description
 
 Determines whether a consumer is enabled (taking the consumer hierarchy into consideration)
 within the Performance Schema.
 
 An exception with errno 3047 is thrown if an unknown consumer name is passed to the function.
 A consumer name of NULL returns NULL.
 
 Parameters
 
 in_consumer VARCHAR(64): 
 The name of the consumer to check.
 
 Returns
 
 ENUM('YES', 'NO')
 
 Example
 
 mysql> SELECT sys.ps_is_consumer_enabled('events_stages_history');
 +-----------------------------------------------------+
 | sys.ps_is_consumer_enabled('events_stages_history') |
 +-----------------------------------------------------+
 | NO                                                  |
 +-----------------------------------------------------+
 1 row in set (0.00 sec)
 