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modified RowChecksum module and updated it in pt-table-checksum (only tool that uses it)

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This commit is contained in:
Frank Cizmich
2014-07-31 18:26:45 -03:00
parent fa8254712b
commit b2bf471e7d
2 changed files with 41 additions and 27 deletions
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39
lib/RowChecksum.pm
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@@ -459,19 +459,32 @@ sub find_replication_differences {
}
my ($dbh, $repl_table) = @args{@required_args};
my $sql
= "SELECT CONCAT(db, '.', tbl) AS `table`, "
. "chunk, chunk_index, lower_boundary, upper_boundary, "
. "COALESCE(this_cnt-master_cnt, 0) AS cnt_diff, "
. "COALESCE("
. "this_crc <> master_crc OR ISNULL(master_crc) <> ISNULL(this_crc), 0"
. ") AS crc_diff, this_cnt, master_cnt, this_crc, master_crc "
. "FROM $repl_table "
. "WHERE (master_cnt <> this_cnt OR master_crc <> this_crc "
. "OR ISNULL(master_crc) <> ISNULL(this_crc))"
. ($args{where} ? " AND ($args{where})" : "");
PTDEBUG && _d($sql);
my $diffs = $dbh->selectall_arrayref($sql, { Slice => {} });
my $ts_clause = $self->{start_ts} ? " AND ts >= '$self->{start_ts}' " : ''; # only check rows created in this run
my $tries = 5; # try again up to five times if replication checksum don't agree.
my $ok_to_leave = 0;
my $diffs;
do {
my $sql
= "SELECT CONCAT(db, '.', tbl) AS `table`, "
. "chunk, chunk_index, lower_boundary, upper_boundary, "
. "COALESCE(this_cnt-master_cnt, 0) AS cnt_diff, "
. "COALESCE("
. "this_crc <> master_crc OR ISNULL(master_crc) <> ISNULL(this_crc), 0"
. ") AS crc_diff, this_cnt, master_cnt, this_crc, master_crc "
. "FROM $repl_table "
. "WHERE (master_cnt <> this_cnt OR master_crc <> this_crc "
. "OR ISNULL(master_crc) <> ISNULL(this_crc)) $ts_clause"
. ($args{where} ? " AND ($args{where})" : "");
PTDEBUG && _d($sql);
$diffs = $dbh->selectall_arrayref($sql, { Slice => {} });
$tries--;
if (@$diffs) {
sleep 1;
} else {
$ok_to_leave = 1;
}
} until ($ok_to_leave || !$tries);
return $diffs;
}