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#!/usr/bin/perl -w |
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|
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# Compare data in two different databases |
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# |
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# 2003-08-07 Dobrica Pavlinusic |
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# |
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# somewhat based on ides from |
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# DataDiff 0.1 by Jon D. Frisby, http://www.mrjoy.com |
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|
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use strict; |
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use Getopt::Long; |
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use DBI; |
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use Data::Dumper; |
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use Pg::Scheme; |
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|
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$| = 1; |
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|
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my ($debug,$verbose) = (0,0); |
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my ($help,$masterhost,$masterport,$masteruser,$masterpassword, |
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$slavehost,$slaveport,$slaveuser,$slavepassword, |
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$masterfile, |
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$slavefile, |
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); |
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my $tables; |
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|
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my $result = GetOptions( |
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"debug!" => \$debug, "verbose!" => \$verbose, "help" => \$help, |
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"masterhost=s" => \$masterhost, "masterport=i" => \$masterport, |
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"masteruser=s" => \$masteruser, "masterpassword=s" => \$masterpassword, |
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"masterfile=s" => \$masterfile, |
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"slavehost=s" => \$slavehost, "slaveport=i" => \$slaveport, |
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"slaveuser=s" => \$slaveuser, "slavepassword=s" => \$slavepassword, |
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"slavefile=s" => \$slavefile, |
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"tables=s" => \$tables, |
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); |
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|
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if (defined($help) || (scalar(@ARGV) < 2)) { |
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print "Usage: $0 [options] masterdb slavedb |
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Options: |
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--masterhost=hostname --masterport=port |
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--masteruser=username --masterpassword=string |
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--masterfile=filename |
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--slavehost=hostname --slaveport=port |
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--slaveuser=username --slavepassword=string |
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--slavefile=filename |
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--tables[s]=table[,table...] |
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"; |
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# exit ((scalar(@ARGV) < 2)? 1:0); |
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exit; |
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} |
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|
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my $master = $ARGV[0] || "master"; |
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my $slave = $ARGV[1] || "slave"; |
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|
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my $minfo = "dbname=$master"; |
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$minfo = "$minfo host=$masterhost" if (defined($masterhost)); |
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$minfo = "$minfo port=$masterport" if (defined($masterport)); |
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|
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my $sinfo = "dbname=$slave"; |
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$sinfo = "$sinfo host=$slavehost" if (defined($slavehost)); |
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$sinfo = "$sinfo port=$slaveport" if (defined($slaveport)); |
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|
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print "Master connection is $minfo\n" if ($debug); |
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print "Slave connection is $sinfo\n" if ($debug); |
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|
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my $mdbh = DBI->connect("DBI:Pg:$minfo", $masteruser, $masterpassword, { PrintError => 1 }); |
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my $sdbh = DBI->connect("DBI:Pg:$sinfo", $slaveuser, $slavepassword, { PrintError => 1 }); |
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|
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my ($diff_shema,$diff_data) = (0,0); |
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|
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my $sql; |
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|
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sub debug_sql { |
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return if (! $debug); |
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my $sql = shift; |
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$sql =~ s/[\n\r]/ /gs; |
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$sql =~ s/\s\s+/ /g; |
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print STDERR "DEBUG: SQL: $sql\n"; |
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} |
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|
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sub debug_row { |
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return if (! $debug); |
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my $row = shift; |
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my @cols = @_; |
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if (! $row) { |
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print STDERR "DEBUG: ROW data is undef!\n"; |
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return; |
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} |
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print STDERR "DEBUG: ROW: [",$#cols+1,"] "; |
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foreach my $col (@cols) { |
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print STDERR "$col:"; |
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if ($row->{$col}) { |
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print $row->{$col}; |
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} else { |
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print "null"; |
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} |
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print " "; |
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} |
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print STDERR "\n"; |
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} |
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|
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sub debug { |
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return if (!$debug); |
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print STDERR "DEBUG: ",@_; |
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} |
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|
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$verbose = 1 if ($debug); |
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|
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# init object for scheme in master database |
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my $mscheme = new Pg::Scheme( 'dbh' => $mdbh ) || die "can't query schema"; |
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|
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# which tables to compare? |
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|
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my @tables = $mscheme->list_tables($tables); |
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|
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debug "Comparing tables: ".join(", ",@tables)."\n"; |
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|
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my $cols; |
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my $diff_total = 0; |
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|
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foreach my $table (@tables) { |
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|
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my $sth; |
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|
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# diff schema |
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|
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my @cols_notnull;# colums compared by a=b |
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my @cols_null; # colums compared by a=b or a is null and b is null |
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my @cols_skip; # skipped columns |
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my @cols_test; # all colums to test (without skipped) |
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my @cols; # all colums (for insert) |
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|
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|
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foreach my $row ($mscheme->explain_table($table)) { |
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# attname | format_type | attnotnull | atthasdef | attnum |
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|
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push @cols,$row->{attname}; |
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|
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# FIXME: do something with attributes which shouldn't be compared |
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# (date, time, datetime, timestamp) |
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if ($row->{format_type} =~ /(date)|(time)/i) { |
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push @cols_skip,$row->{attname}; |
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next; |
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} |
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|
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push @cols_test,$row->{attname}; |
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|
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if ($row->{attnotnull}) { |
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push @cols_notnull,$row->{attname}; |
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} else { |
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push @cols_null,$row->{attname}; |
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} |
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} |
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|
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if ($debug) { |
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print STDERR "DEBUG: table $table not null cols: (",join(", ",@cols_notnull),")"; |
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print STDERR " - null cols: (",join(", ",@cols_null),")" if (@cols_null); |
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print STDERR " - skip cols: (",join(", ",@cols_skip),")" if (@cols_skip); |
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print STDERR "\n"; |
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} |
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|
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# diff data |
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|
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my @cols_pk; # columns which are primary key |
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my %in_pk; |
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|
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$sql=" |
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SELECT |
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i.indexrelid as indexrelid, i.indrelid as indrelid, |
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count(a.attname) as cols_in_pk |
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FROM |
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pg_catalog.pg_class c, |
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pg_catalog.pg_index i, |
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pg_catalog.pg_attribute a |
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WHERE |
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c.oid = i.indrelid |
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and i.indisunique |
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and c.relname = '$table' |
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and a.attrelid = i.indexrelid |
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GROUP BY |
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i.indexrelid, i.indrelid, c.relname, i.indisprimary, i.indisunique |
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ORDER BY |
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cols_in_pk ASC, i.indisprimary DESC, i.indisunique DESC, c.relname DESC |
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"; |
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debug_sql($sql); |
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$sth = $mdbh->prepare($sql); |
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$sth->execute() || die; |
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my $row = $sth->fetchrow_hashref(); |
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if ($row) { |
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$sql=" |
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select a1.attname as attname from pg_attribute a1, pg_attribute a2 where a1.attrelid = ".$row->{indexrelid}." and a2.attrelid=".$row->{indrelid}." and a1.attname = a2.attname and a2.attnotnull"; |
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|
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debug_sql($sql); |
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my $sth2 = $mdbh->prepare($sql); |
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$sth2->execute() || die; |
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@cols_pk = (); |
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while (my $row2 = $sth2->fetchrow_hashref()) { |
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push @cols_pk,$row2->{attname}; |
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$in_pk{$row2->{attname}}++; |
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} |
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|
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} |
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if (! @cols_pk) { |
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print STDERR "can't find PK rows for table '$table' using all\n"; |
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@cols_pk = @cols; |
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} |
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|
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my @cols_cmp; # columns to compare |
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|
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foreach my $col (@cols_test) { |
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push @cols_cmp,$col if (! $in_pk{$col}); |
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} |
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|
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if ($verbose) { |
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print "table '$table' using for key: (",join(", ",@cols_pk),") to compare cols: (",join(", ",@cols_cmp),")\n"; |
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} |
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|
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# diff data |
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|
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my $msql = "select ".join(",",@cols)." from $table"; |
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my $ssql = $msql; |
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|
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sub sql_where { |
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my @cols = @_; |
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my $and = ""; |
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my $where = " where "; |
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foreach my $col (@cols) { |
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$where .= "$and$col=?"; |
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$and = " and "; |
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} |
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return $where; |
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} |
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|
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sub sql_order { |
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my @cols = @_; |
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my $order = " order by "; |
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my $comma = ""; |
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foreach my $col (@cols) { |
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$order .= "$comma$col asc"; |
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$comma = ", "; |
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} |
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return $order; |
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} |
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|
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my $order = sql_order(@cols_pk); |
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$msql .= $order; |
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$ssql .= $order; |
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|
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debug_sql($msql); |
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|
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my $msth = $mdbh->prepare($msql) || die; |
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$msth->execute() || die; |
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|
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my $ssth = $sdbh->prepare($ssql) || die; |
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$ssth->execute() || die; |
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|
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my $diff_row = 0; |
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|
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my ($mrow,$srow); |
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# have_* |
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use constant NO_ROW => 0; |
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use constant FETCH_ROW => 1; |
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use constant HAVE_ROW => 2; |
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my ($have_mrow,$have_srow) = (FETCH_ROW,FETCH_ROW); |
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|
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while ($have_mrow != NO_ROW || $have_srow != NO_ROW) { |
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|
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debug "have mrow: $have_mrow srow: $have_srow\n"; |
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|
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sub pk_val { |
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my $row = shift || die "need row"; |
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my @cols = shift || die "need cols"; |
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my @val; |
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foreach my $col (@cols) { |
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push @val,$row->{$col}; |
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} |
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return @val; |
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} |
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|
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# fetch row from master |
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if ($have_mrow == FETCH_ROW) { |
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debug "fetch row from master: $msql\n"; |
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$mrow = $msth->fetchrow_hashref(); |
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debug_row($mrow,@cols); |
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|
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if ($mrow) { |
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# fill-in primary key values |
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$have_mrow = HAVE_ROW; |
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} else { |
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$have_mrow = NO_ROW; |
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} |
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} |
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|
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# fetch row from slave |
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if ($have_srow == FETCH_ROW) { |
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debug "fetch row from slave: $ssql\n"; |
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$srow = $ssth->fetchrow_hashref(); |
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debug_row($srow,@cols); |
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if ($srow) { |
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$have_srow = HAVE_ROW; |
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} else { |
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$have_srow = NO_ROW; |
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} |
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} |
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|
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debug "have mrow: $have_mrow srow: $have_srow\n"; |
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|
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# insert into slave database |
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sub sql_insert { |
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my $table = shift @_ || die "need table as argument"; |
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my $row = shift @_ || die "need row data"; |
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my @cols = @_; |
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|
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my $sql = "insert into $table (".join(",",@cols).") values ("; |
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my $comma = ""; |
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foreach my $col (@cols) { |
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$sql .= $comma.$mdbh->quote($row->{$col}); |
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$comma = ","; |
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} |
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$sql.=")"; |
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debug_sql($sql); |
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return $sql; |
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} |
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|
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# delete from slave database |
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sub sql_delete { |
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my $table = shift @_ || die "need table as argument"; |
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my $row = shift @_ || die "need row as argument"; |
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my @cols_pk = @_; |
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|
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my $where = sql_where(@cols_pk); |
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|
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my $sql = "delete from $table "; |
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foreach my $col (@cols_pk) { |
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my $val = $sdbh->quote($row->{$col}) || die "can't find value in row for col $col"; |
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$where =~ s/\?/$val/; |
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} |
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$sql .= $where; |
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debug_sql($sql); |
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return $sql; |
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} |
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|
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# update row in slave database |
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sub sql_update { |
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my $table = shift @_ || die "need table as argument"; |
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my $col = shift @_ || die "need col to update"; |
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my $val = shift @_ || die "need new val"; |
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my @cols_pk = @_ || die "need pk idenitifier"; |
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|
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my $sql = "udate $table set $col=".$mdbh->quote($val); |
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debug_sql($sql); |
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return $sql; |
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} |
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# master slave |
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# 1 = 1 test |
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# 1 < 2 insert mrow |
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# 2 > 1 delete srow |
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# 1 = undef insert mrow |
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# undef = 1 delete srow |
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|
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my $pk_same = 1; |
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|
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# check key cols for row |
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foreach my $col (@cols_pk) { |
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if ( ($have_mrow == NO_ROW && $have_srow == HAVE_ROW) || |
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($have_mrow == HAVE_ROW && $have_srow == HAVE_ROW && $mrow->{$col} gt $srow->{$col}) ) { |
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$diff_row++; |
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$pk_same = 0; |
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print STDERR "EXTRA row in table '$table' pk: [".join(",",@cols_pk)."] value (".join(",",pk_val($srow,@cols_pk)).")\n" if ($verbose); |
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print sql_delete($table,$srow,@cols_pk),";\n"; |
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$have_srow = FETCH_ROW; |
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last; |
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} elsif ( ($have_mrow == HAVE_ROW && $have_srow == NO_ROW) || |
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($have_mrow == HAVE_ROW && $have_srow == HAVE_ROW && $mrow->{$col} lt $srow->{$col}) ) { |
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$diff_row++; |
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$pk_same = 0; |
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print STDERR "MISSING row in table '$table' pk: [".join(",",@cols_pk)."] value (".join(",",pk_val($mrow,@cols_pk)).")\n" if ($verbose); |
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print sql_insert($table,$mrow,@cols),";\n"; |
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$have_mrow = FETCH_ROW; |
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last; |
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} |
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} |
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|
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if ($pk_same && $have_mrow == HAVE_ROW && $have_srow == HAVE_ROW) { |
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# check non-key cols for row |
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foreach my $col (@cols_cmp) { |
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if ($mrow->{$col} ne $srow->{$col}) { |
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$diff_row++; |
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print STDERR "DIFF in table '$table' row ($col): [".join(",",@cols_pk)."] '$mrow->{$col}' != '$srow->{$col}'\n" if ($verbose); |
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print sql_update($table,$col,$mrow->{$col},@cols_pk),";\n"; |
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} |
| 392 |
} |
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$have_mrow = FETCH_ROW; |
| 394 |
$have_srow = FETCH_ROW; |
| 395 |
} |
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} |
| 397 |
|
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print STDERR "$diff_row differences in table $table\n" if ($verbose && $diff_row > 0); |
| 399 |
$diff_total += $diff_row; |
| 400 |
} |
| 401 |
|
| 402 |
if ($verbose) { |
| 403 |
if ($diff_total == 0) { |
| 404 |
print STDERR "databases are same"; |
| 405 |
} elsif ($diff_total > 0) { |
| 406 |
print STDERR "$diff_total differences in all tables\n"; |
| 407 |
} else { |
| 408 |
die "this shouldn't happend. please report a bug!"; |
| 409 |
} |
| 410 |
} |
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|
| 412 |
$mdbh->disconnect(); |
| 413 |
$sdbh->disconnect(); |
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