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# ==== Purpose ==== # # Execute CHANGE MASTER to make the applier threads skip to the end of # the relay log. # # WARNING! After using this file with auto_position=0, the applier # thread's master_log_pos is not up to date. This can cause # MASTER_POS_WAIT to hang. The applier thread's master_log_pos is only # updated when the applier thread executes events, not when CHANGE # MASTER is used to fast-forward the position as this script does. # # ==== Usage ==== # # [--let $rpl_channel_name= CHANNEL] # --source include/rpl_skip_to_end_of_relay_log.inc # # Parameters: # $rpl_channel_name # By default, uses the empty channel (channel name ''). Set this # if you want to operate on any other channel. --let $include_filename= include/rpl_skip_to_end_of_relay_log.inc --source include/begin_include_file.inc if (!$rpl_debug) { --disable_query_log } --source include/rpl_get_end_of_relay_log.inc --let $_rsteorl_is_auto_position= query_get_value(SHOW SLAVE STATUS, Auto_Position, 1) if ($_rsteorl_is_auto_position) { --let $_rsteorl_received_gtid_set= query_get_value(SHOW SLAVE STATUS, Retrieved_Gtid_Set, 1) # Find transactions in relay log which are not in gtid_executed. --let $_rsteorl_skip_set= `SELECT GTID_SUBTRACT('$_rsteorl_received_gtid_set', @@GLOBAL.GTID_EXECUTED)` # Generate empty transactions. while ($_rsteorl_skip_set != '') { --let $_rsteorl_skip_gtid= `SELECT GTID_FROM_GTID_SET('$_rsteorl_skip_set')` eval SET GTID_NEXT = '$_rsteorl_skip_gtid'; COMMIT; SET GTID_NEXT = 'AUTOMATIC'; --let $_rsteorl_skip_set= `SELECT GTID_SUBTRACT('$_rsteorl_skip_set', '$_rsteorl_skip_gtid')` } } if (!$_rsteorl_is_auto_position) { eval CHANGE MASTER TO RELAY_LOG_FILE = '$relay_log_file', RELAY_LOG_POS = $relay_log_size FOR CHANNEL '$rpl_channel_name'; } --source include/start_slave_sql.inc --let $include_filename= include/rpl_skip_to_end_of_relay_log.inc --source include/end_include_file.inc