NOTE: this is post-O'Reilly final.

when a @code{COMMIT} is performed.

A query cannot be cached if it contains one of the functions:

@multitable @columnfractions .25 .25 .25 .25

@item @strong{Function} @tab @strong{Function}

 @tab @strong{Function} @tab @strong{Function}

@item @code{User-Defined Functions} @tab @code{CONNECTION_ID}

 @tab @code{FOUND_ROWS} @tab @code{GET_LOCK}

@item @code{RELEASE_LOCK} @tab @code{LOAD_FILE}

 @tab @code{MASTER_POS_WAIT} @tab @code{NOW}

@item @code{SYSDATE} @tab @code{CURRENT_TIMESTAMP}

 @tab @code{CURDATE} @tab @code{CURRENT_DATE}

@item @code{CURTIME} @tab @code{CURRENT_TIME}

 @tab @code{DATABASE} @tab @code{ENCRYPT} (with one parameter)

@item @code{LAST_INSERT_ID} @tab @code{RAND}

 @tab @code{UNIX_TIMESTAMP} (without parameters) @tab @code{USER}

@item @code{BENCHMARK} @tab

 @tab @tab

@multitable @columnfractions .33 .33 .34

@item @strong{Function}

 @tab @strong{Function}

 @tab @strong{Function}

@item @code{User-Defined Functions}

 @tab @code{CONNECTION_ID}

 @tab @code{FOUND_ROWS}

@item @code{GET_LOCK}

 @tab @code{RELEASE_LOCK}

 @tab @code{LOAD_FILE}

@item @code{MASTER_POS_WAIT}

 @tab @code{NOW}

 @tab @code{SYSDATE}

@item @code{CURRENT_TIMESTAMP}

 @tab @code{CURDATE}

 @tab @code{CURRENT_DATE}

@item @code{CURTIME}

 @tab @code{CURRENT_TIME}

 @tab @code{DATABASE}

@item @code{ENCRYPT} (with one parameter)

 @tab @code{LAST_INSERT_ID}

 @tab @code{RAND}

@item @code{UNIX_TIMESTAMP} (without parameters)

 @tab @code{USER}

 @tab @code{BENCHMARK}

@end multitable

Nor can a query be cached if it contains user variables,