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# ==== Purpose ====
#
# Extract the epoch values from SHOW ENGINE NDB STATUS.
#
# ==== Usage ====
#
# --source include/get_ndb_epochs.inc
# --echo $ndb_latest_epoch
# --echo $ndb_latest_trans_epoch
# --echo $ndb_latest_received_binlog_epoch
# --echo $ndb_latest_handled_binlog_epoch
# --echo $ndb_latest_applied_binlog_epoch
#
# ==== Parameters ====
#
# $ndb_status_binlog_row
# The row number of the output of SHOW ENGINE NDB STATUS
# last was seen.
# No need to set explictly, but used between sourcing this
# include file several times, since it is highly probable
# (but not certain) that same row number also applies next
# time.
if (!$ndb_status_binlog_row)
{
let $ndb_status_binlog_row = 1;
}
# Try two times, in case the row number of binlog state changes
# between two invocations of SHOW ENGINE NDB STATUS.
let $attempts= 2;
while ($attempts)
{
let $q= query_get_value(SHOW ENGINE NDB STATUS, Status, $ndb_status_binlog_row);
if ( `SELECT '$q' = 'No such row'` )
{
dec $attempts;
if (!$attempts)
{
echo ERROR IN TEST: No binlog row found in SHOW ENGINE NDB STATUS;
die ERROR IN TEST: No binlog row found in SHOW ENGINE NDB STATUS;
}
# row will be increased to 1 further down
let $ndb_status_binlog_row = 0;
}
if (`SELECT INSTR('$q', 'latest_epoch=')`)
{
let $attempts = 0 ;
}
if ($attempts)
{
inc $ndb_status_binlog_row;
}
}
let $ndb_latest_epoch= `SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(SUBSTRING('$q', INSTR('$q', 'latest_epoch=')), ',', 1), '=', -1)`;
let $ndb_latest_trans_epoch= `SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(SUBSTRING('$q', INSTR('$q', 'latest_trans_epoch=')), ',', 1), '=', -1)`;
let $ndb_latest_received_binlog_epoch= `SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(SUBSTRING('$q', INSTR('$q', 'latest_received_binlog_epoch=')), ',', 1), '=', -1)`;
let $ndb_latest_handled_binlog_epoch= `SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(SUBSTRING('$q', INSTR('$q', 'latest_handled_binlog_epoch=')), ',', 1), '=', -1)`;
let $ndb_latest_applied_binlog_epoch= `SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(SUBSTRING('$q', INSTR('$q', 'latest_applied_binlog_epoch=')), ',', 1), '=', -1)`;