A StmtExecute packet is sent to trigger the execution of a prepared statement that has already been prepared.
int sequenceId: the sequence ID for the packet.
String packetType: is always "StmtExecute" - read-only
int statementId: the ID of the statement to execute
int flags: the flags for this request. The meaning of these flags is available in the MySQL documentation.
Note: the parameter values are not currently available.