mirror of
https://github.com/percona/percona-toolkit.git
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136 lines
3.6 KiB
Perl
136 lines
3.6 KiB
Perl
# This program is copyright 2007-2011 Baron Schwartz, 2011 Percona Ireland Ltd.
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# Feedback and improvements are welcome.
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#
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# THIS PROGRAM IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED
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# WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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# MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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#
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# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free Software
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# Foundation, version 2; OR the Perl Artistic License. On UNIX and similar
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# systems, you can issue `man perlgpl' or `man perlartistic' to read these
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# licenses.
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#
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# You should have received a copy of the GNU General Public License along with
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# this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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# Place, Suite 330, Boston, MA 02111-1307 USA.
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# ###########################################################################
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# TableSyncStream package
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# ###########################################################################
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{
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# Package: TableSyncStream
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# TableSyncStream is a table sync algo that selects all rows.
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# This package implements the simplest possible table-sync algorithm:
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# read every row from the tables and compare them.
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package TableSyncStream;
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use strict;
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use warnings FATAL => 'all';
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use English qw(-no_match_vars);
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use constant PTDEBUG => $ENV{PTDEBUG} || 0;
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sub new {
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my ( $class, %args ) = @_;
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foreach my $arg ( qw(Quoter) ) {
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die "I need a $arg argument" unless $args{$arg};
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}
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my $self = { %args };
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return bless $self, $class;
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}
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sub name {
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return 'Stream';
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}
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sub can_sync {
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return 1; # We can sync anything.
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}
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sub prepare_to_sync {
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my ( $self, %args ) = @_;
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my @required_args = qw(cols ChangeHandler);
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foreach my $arg ( @required_args ) {
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die "I need a $arg argument" unless $args{$arg};
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}
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$self->{cols} = $args{cols};
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$self->{buffer_in_mysql} = $args{buffer_in_mysql};
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$self->{ChangeHandler} = $args{ChangeHandler};
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$self->{done} = 0;
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return;
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}
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sub uses_checksum {
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return 0; # We don't need checksum queries.
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}
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sub set_checksum_queries {
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return; # This shouldn't be called, but just in case.
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}
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sub prepare_sync_cycle {
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my ( $self, $host ) = @_;
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return;
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}
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sub get_sql {
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my ( $self, %args ) = @_;
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return "SELECT "
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. ($self->{buffer_in_mysql} ? 'SQL_BUFFER_RESULT ' : '')
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. join(', ', map { $self->{Quoter}->quote($_) } @{$self->{cols}})
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. ' FROM ' . $self->{Quoter}->quote(@args{qw(database table)})
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. ' WHERE ' . ( $args{where} || '1=1' );
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}
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sub same_row {
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my ( $self, %args ) = @_;
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return;
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}
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sub not_in_right {
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my ( $self, %args ) = @_;
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$self->{ChangeHandler}->change('INSERT', $args{lr}, $self->key_cols());
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}
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sub not_in_left {
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my ( $self, %args ) = @_;
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$self->{ChangeHandler}->change('DELETE', $args{rr}, $self->key_cols());
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}
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sub done_with_rows {
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my ( $self ) = @_;
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$self->{done} = 1;
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}
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sub done {
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my ( $self ) = @_;
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return $self->{done};
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}
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sub key_cols {
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my ( $self ) = @_;
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return $self->{cols};
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}
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# Return 1 if you have changes yet to make and you don't want the TableSyncer to
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# commit your transaction or release your locks.
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sub pending_changes {
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my ( $self ) = @_;
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return;
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}
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sub _d {
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my ($package, undef, $line) = caller 0;
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@_ = map { (my $temp = $_) =~ s/\n/\n# /g; $temp; }
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map { defined $_ ? $_ : 'undef' }
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@_;
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print STDERR "# $package:$line $PID ", join(' ', @_), "\n";
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}
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1;
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}
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# ###########################################################################
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# End TableSyncStream package
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# ###########################################################################
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