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# ==== Purpose ====
#
# Waits until SHOW SLAVE STATUS has returned a specified value, or
# until a timeout is reached.
#
# ==== Usage ====
#
# let $slave_param= Slave_SQL_Running;
# let $slave_param_value= No;
# source include/slave_wait_param.inc;
#
# Parameters:
#
# $slave_param, $slave_param_value
# This macro will wait until the column of the output of SHOW SLAVE
# STATUS named $slave_param gets the value $slave_param_value. See
# the example above.
#
# $slave_param_comparison
# By default, this file waits until $slave_param becomes equal to
# $slave_param_value. If you want to wait until $slave_param
# becomes *unequal* to $slave_param_value, set this parameter to the
# string '!=', like this:
# let $slave_param_comparison= !=;
#
# $slave_timeout
# The default timeout is 5 minutes. You can change the timeout by
# setting $slave_timeout. The unit is tenths of seconds.
#
# $master_connection
# If the timeout is reached, debug info is given by calling SHOW
# SLAVE STATUS, SHOW PROCESSLIST, and SHOW BINLOG EVENTS. Then, a
# 'connection master' is then issued, and more debug info is given
# by calling SHOW MASTER STATUS, SHOW PROCESSLIST, and SHOW BINLOG
# EVENTS. If $master_connection is set, the latter three commands
# will be issued on $master_connection instead of on the host named
# 'master'. See also show_rpl_debug_info.inc
#
# $slave_error_message
# If set, this is printed when a timeout occurs. This is primarily
# intended to be used by other wait_for_slave_* macros, to indicate
# what the purpose of the wait was. (A very similar error message is
# given by default, but the wait_for_slave_* macros use this to give
# an error message identical to that in previous versions, so that
# errors are easier searchable in the pushbuild history.)
let $_slave_timeout_counter= $slave_timeout;
if (!$_slave_timeout_counter)
{
let $_slave_timeout_counter= 3000;
}
# Save resulting counter for later use.
let $slave_tcnt= $_slave_timeout_counter;
let $_slave_param_comparison= $slave_param_comparison;
if (`SELECT '$_slave_param_comparison' = ''`)
{
let $_slave_param_comparison= =;
}
let $_show_slave_status_value= query_get_value("SHOW SLAVE STATUS", $slave_param, 1);
while (`SELECT NOT('$_show_slave_status_value' $_slave_param_comparison '$slave_param_value') AND $_slave_timeout_counter > 0`)
{
dec $_slave_timeout_counter;
if ($_slave_timeout_counter)
{
sleep 0.1;
let $_show_slave_status_value= query_get_value("SHOW SLAVE STATUS", $slave_param, 1);
}
}
# This has to be outside the loop until BUG#41913 has been fixed
if (!$_slave_timeout_counter)
{
--echo **** ERROR: timeout after $slave_tcnt deci-seconds while waiting for slave parameter $slave_param $_slave_param_comparison $slave_param_value ****
if (`SELECT '$slave_error_message' != ''`)
{
--echo Message: $slave_error_message
}
--echo Current connection is '$CURRENT_CONNECTION'
echo Note: the following output may have changed since the failure was detected;
source include/show_rpl_debug_info.inc;
die;
}
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