1 |
# -*- perl -*- |
2 |
# RServ.pm |
3 |
# Vadim Mikheev, (c) 2000, PostgreSQL Inc. |
4 |
|
5 |
package RServ; |
6 |
|
7 |
require Exporter; |
8 |
@ISA = qw(Exporter); |
9 |
@EXPORT = qw(PrepareSnapshot ApplySnapshot GetSyncID SyncSyncID CleanLog GetServerId |
10 |
Rollback RollbackAndQuit Connect Exec Exec2 |
11 |
$debug $quiet $verbose |
12 |
); |
13 |
@EXPORT_OK = qw(); |
14 |
use strict; |
15 |
use Pg; |
16 |
|
17 |
my $debug = 0; |
18 |
my $quiet = 1; |
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my $verbose = 0; |
20 |
|
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$debug = 1; |
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$quiet = 0; |
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$verbose = 1; |
24 |
|
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my %Mtables = (); |
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my %Stables = (); |
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|
28 |
sub GetServerId |
29 |
{ |
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my ($mconn, $DB, $Host) = @_; # (@_[0], @_[1]. @_[2]); |
31 |
|
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print STDERR "GetServerId: host $Host, database $DB\n" if ($debug); |
33 |
|
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my $result = $mconn->exec("SELECT server FROM _RSERV_SERVERS_ WHERE". |
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" host='$Host' AND dbase='$DB'"); |
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|
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if ($result->resultStatus ne PGRES_TUPLES_OK) |
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{ |
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print STDERR $mconn->errorMessage unless ($quiet); |
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return(-1); |
41 |
} |
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|
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if ($result->cmdTuples && $result->cmdTuples > 1) |
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{ |
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printf STDERR "Duplicate host definitions.\n" unless ($quiet); |
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return(-2); |
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} |
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|
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my @row = $result->fetchrow; |
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|
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print "GetServerId($DB,$Host) == $row[0]\n" if ($debug); |
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|
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return $row[0]; |
54 |
} |
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|
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sub PrepareSnapshot |
57 |
{ |
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my ($mconn, $sconn, $outf, $mserver, $sserver, $onlytables) = @_; |
59 |
|
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print STDERR "## d: $debug v: $verbose q: $quiet\n"; |
61 |
|
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if ($mserver == $sserver) { |
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print STDERR "master and slave numbers are same [$mserver] !\n"; |
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return(-1); |
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} |
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|
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print "PrepareSnapshot master: $mserver slave: $sserver\n" if ($debug); |
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|
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# first, we must know for wich tables the slave subscribed |
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my $result = $sconn->exec("SELECT tname FROM _RSERV_SLAVE_TABLES_"); |
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if ($result->resultStatus ne PGRES_TUPLES_OK) |
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{ |
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print STDERR $mconn->errorMessage unless ($quiet); |
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return(-1); |
75 |
} |
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|
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my @row; |
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while (@row = $result->fetchrow) { |
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$Stables{$row[0]} = 1; |
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} |
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|
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$result = $mconn->exec("BEGIN"); |
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if ($result->resultStatus ne PGRES_COMMAND_OK) |
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{ |
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print STDERR $mconn->errorMessage unless ($quiet); |
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$mconn->exec("ROLLBACK"); |
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return(-1); |
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} |
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$result = $mconn->exec("set transaction isolation level serializable"); |
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if ($result->resultStatus ne PGRES_COMMAND_OK) |
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{ |
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print STDERR $mconn->errorMessage unless ($quiet); |
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$mconn->exec("ROLLBACK"); |
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return(-1); |
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} |
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|
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# MAP oid --> tabname, keyname, key_type |
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$result = $mconn->exec("select pgc.oid, pgc.relname, pga.attname, pgt.typname" . |
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" from _RSERV_TABLES_ rt, pg_class pgc, pg_attribute pga" . |
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", pg_type pgt". |
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" where pgc.oid = rt.reloid AND pga.attrelid = rt.reloid" . |
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" AND pga.attnum = rt.key AND pga.atttypid=pgt.oid"); |
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if ($result->resultStatus ne PGRES_TUPLES_OK) |
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{ |
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print STDERR $mconn->errorMessage unless ($quiet); |
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$mconn->exec("ROLLBACK"); |
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return(-1); |
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} |
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|
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while (@row = $result->fetchrow) |
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{ |
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# printf "$row[0], $row[1], $row[2]\n"; |
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if (ref($onlytables) eq 'HASH') { |
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next unless (exists $onlytables->{$row[1]}); |
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$onlytables->{$row[1]} = $row[0] unless ($onlytables->{$row[1]}); |
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} |
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push @{$Mtables{$row[0]}}, $row[1], $row[2], $row[3]; |
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} |
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|
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print "Prepare snapshot for tables with oid: ",join(",",keys %Mtables),"\n" if ($debug); |
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|
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# Read last succeeded sync |
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my $sql = "select syncid, synctime, minid, maxid, active from _RSERV_SYNC_" . |
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" where server = $sserver AND syncid = (select max(syncid) from" . |
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" _RSERV_SYNC_ where server = $sserver AND status > 0)"; |
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|
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printf "$sql\n" if $debug; |
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|
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$result = $mconn->exec($sql); |
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if ($result->resultStatus ne PGRES_TUPLES_OK) |
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{ |
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print STDERR $mconn->errorMessage unless ($quiet); |
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$mconn->exec("ROLLBACK"); |
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return(-1); |
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} |
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|
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my @lastsync = $result->fetchrow; |
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|
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# exclude data which originated from master server |
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my $sel_server = " and l.server = $mserver "; |
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|
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my $sinfo = ""; |
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if (@lastsync && $lastsync[3] ne '') # sync info |
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{ |
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$sinfo = "and (l.logid >= $lastsync[3]"; |
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$sinfo .= " or l.logid in ($lastsync[4])" if $lastsync[4] ne ''; |
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$sinfo .= ")"; |
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} |
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|
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my $havedeal = 0; |
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|
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# DELETED rows |
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$sql = "select l.reloid, l.key from _RSERV_LOG_ l" . |
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" where l.delete = 1 $sinfo $sel_server order by l.reloid"; |
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|
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printf "DELETED: $sql\n" if $debug; |
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|
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$result = $mconn->exec($sql); |
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if ($result->resultStatus ne PGRES_TUPLES_OK) |
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{ |
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print STDERR $mconn->errorMessage unless ($quiet); |
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$mconn->exec("ROLLBACK"); |
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return(-1); |
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} |
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|
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my $lastoid = -1; |
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while (@row = $result->fetchrow) |
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{ |
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next unless exists $Mtables{$row[0]}; |
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next unless exists $Stables{$Mtables{$row[0]}[0]}; |
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|
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if ($lastoid != $row[0]) |
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{ |
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if ($lastoid == -1) |
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{ |
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my $syncid = GetSYNCID($mconn, $outf); |
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return($syncid) if $syncid < 0; |
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$havedeal = 1; |
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} |
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else |
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{ |
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printf $outf "\\.\n"; |
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} |
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printf $outf "-- DELETE $Mtables{$row[0]}[0]\n"; |
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$lastoid = $row[0]; |
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} |
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if (! defined $row[1]) |
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{ |
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print STDERR "NULL key\n" unless ($quiet); |
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$mconn->exec("ROLLBACK"); |
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return(-2); |
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} |
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printf $outf "%s\n", OutputValue($row[1]); |
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} |
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printf $outf "\\.\n" if ($lastoid != -1); |
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|
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# UPDATED rows |
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|
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my ($taboid, $tabname, $tabkey); |
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foreach $taboid (keys %Mtables) |
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{ |
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my ($tabname, $tabkey, $keytype) = @{$Mtables{$taboid}}; |
203 |
next unless exists $Stables{$tabname}; |
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|
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my $oidkey = ($tabkey eq 'oid') ? "_$tabname.oid," : ''; |
206 |
|
207 |
$sql = sprintf "SELECT $oidkey \"_$tabname\".* FROM \"$tabname\" ". |
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"\"_$tabname\", _RSERV_LOG_ l WHERE l.reloid = $taboid AND l.update = 1". |
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" $sinfo AND \"_$tabname\".\"${tabkey}\"=l.key::${keytype}". |
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$sel_server; |
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|
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printf "UPDATED: $sql\n" if $debug; |
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|
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$result = $mconn->exec($sql); |
215 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
216 |
{ |
217 |
printf $outf "-- ERROR\n" if $havedeal; |
218 |
print STDERR $mconn->errorMessage unless ($quiet); |
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$mconn->exec("ROLLBACK"); |
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return(-1); |
221 |
} |
222 |
next if $result->ntuples <= 0; |
223 |
if (! $havedeal) |
224 |
{ |
225 |
my $syncid = GetSYNCID($mconn, $outf); |
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return($syncid) if $syncid < 0; |
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$havedeal = 1; |
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} |
229 |
printf $outf "-- UPDATE $tabname\n"; |
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printf "-- UPDATE $tabname\n" if $debug; |
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while (@row = $result->fetchrow) |
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{ |
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for (my $i = 0; $i <= $#row; $i++) |
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{ |
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printf $outf " " if $i; |
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printf " " if $i && $debug; |
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printf $outf "%s", OutputValue($row[$i]); |
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printf "%s", OutputValue($row[$i]) if $debug;; |
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} |
240 |
printf $outf "\n"; |
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printf "\n" if $debug; |
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} |
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printf $outf "\\.\n"; |
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printf "\\.\n" if $debug;; |
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} |
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|
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# INSERTED rows |
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|
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foreach $taboid (keys %Mtables) |
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{ |
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my ($tabname, $tabkey, $keytype) = @{$Mtables{$taboid}}; |
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next unless exists $Stables{$tabname}; |
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|
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my $oidkey = ($tabkey eq 'oid') ? "_$tabname.oid," : ''; |
255 |
|
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$sql = sprintf "SELECT $oidkey \"_$tabname\".* FROM \"$tabname\" ". |
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"\"_$tabname\", _RSERV_LOG_ l WHERE l.reloid = $taboid AND l.insert = 1". |
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" $sinfo AND \"_$tabname\".\"${tabkey}\"=l.key::${keytype}". |
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$sel_server; |
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|
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printf "INSERTED: $sql\n" if $debug; |
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|
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$result = $mconn->exec($sql); |
264 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
265 |
{ |
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printf $outf "-- ERROR\n" if $havedeal; |
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print STDERR $mconn->errorMessage unless ($quiet); |
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$mconn->exec("ROLLBACK"); |
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return(-1); |
270 |
} |
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next if $result->ntuples <= 0; |
272 |
if (! $havedeal) |
273 |
{ |
274 |
my $syncid = GetSYNCID($mconn, $outf); |
275 |
return($syncid) if $syncid < 0; |
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$havedeal = 1; |
277 |
} |
278 |
printf $outf "-- INSERT $tabname\n"; |
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printf "-- INSERT $tabname\n" if $debug; |
280 |
while (@row = $result->fetchrow) |
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{ |
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for (my $i = 0; $i <= $#row; $i++) |
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{ |
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printf $outf " " if $i; |
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printf " " if $i && $debug; |
286 |
printf $outf "%s", OutputValue($row[$i]); |
287 |
printf "%s", OutputValue($row[$i]) if $debug;; |
288 |
} |
289 |
printf $outf "\n"; |
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printf "\n" if $debug; |
291 |
} |
292 |
printf $outf "\\.\n"; |
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printf "\\.\n" if $debug;; |
294 |
} |
295 |
|
296 |
|
297 |
unless ($havedeal) |
298 |
{ |
299 |
$mconn->exec("ROLLBACK"); |
300 |
return(0); |
301 |
} |
302 |
|
303 |
# Remember this snapshot info |
304 |
$result = $mconn->exec("select _rserv_sync_($sserver)"); |
305 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
306 |
{ |
307 |
printf $outf "-- ERROR\n"; |
308 |
print STDERR $mconn->errorMessage unless ($quiet); |
309 |
$mconn->exec("ROLLBACK"); |
310 |
return(-1); |
311 |
} |
312 |
|
313 |
$result = $mconn->exec("COMMIT"); |
314 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
315 |
{ |
316 |
printf $outf "-- ERROR\n"; |
317 |
print STDERR $mconn->errorMessage unless ($quiet); |
318 |
$mconn->exec("ROLLBACK"); |
319 |
return(-1); |
320 |
} |
321 |
printf $outf "-- OK\n"; |
322 |
printf "-- OK\n" if $debug; |
323 |
|
324 |
return(1); |
325 |
|
326 |
} |
327 |
|
328 |
sub OutputValue |
329 |
{ |
330 |
my ($val) = @_; # @_[0]; |
331 |
|
332 |
return("\\N") unless defined $val; |
333 |
|
334 |
$val =~ s/\\/\\\\/g; |
335 |
$val =~ s/ /\\011/g; |
336 |
$val =~ s/\n/\\012/g; |
337 |
$val =~ s/\'/\\047/g; |
338 |
|
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return($val); |
340 |
} |
341 |
|
342 |
# Get syncid for new snapshot |
343 |
sub GetSYNCID |
344 |
{ |
345 |
my ($conn, $outf) = @_; # (@_[0], @_[1]); |
346 |
|
347 |
my $result = $conn->exec("select nextval('_rserv_sync_seq_')"); |
348 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
349 |
{ |
350 |
print STDERR $conn->errorMessage unless ($quiet); |
351 |
$conn->exec("ROLLBACK"); |
352 |
return(-1); |
353 |
} |
354 |
|
355 |
my @row = $result->fetchrow; |
356 |
|
357 |
printf $outf "-- SYNCID $row[0]\n"; |
358 |
printf "-- SYNCID $row[0]\n" if $debug; |
359 |
return($row[0]); |
360 |
} |
361 |
|
362 |
|
363 |
sub CleanLog |
364 |
{ |
365 |
my ($conn, $howold, $onlytables) = @_; # (@_[0], @_[1]); |
366 |
|
367 |
my $result = $conn->exec("BEGIN"); |
368 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
369 |
{ |
370 |
print STDERR $conn->errorMessage unless ($quiet); |
371 |
$conn->exec("ROLLBACK"); |
372 |
return(-1); |
373 |
} |
374 |
|
375 |
my $sql = "select rs.maxid, rs.active from _RSERV_SYNC_ rs" . |
376 |
" where rs.syncid = (select max(rs2.syncid) from _RSERV_SYNC_ rs2" . |
377 |
" where rs2.server = rs.server AND rs2.status > 0) order by rs.maxid"; |
378 |
|
379 |
printf "$sql\n" if $debug; |
380 |
|
381 |
$result = $conn->exec($sql); |
382 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
383 |
{ |
384 |
print STDERR $conn->errorMessage unless ($quiet); |
385 |
return(-1); |
386 |
} |
387 |
my $maxid = ''; |
388 |
my %active = (); |
389 |
while (my @row = $result->fetchrow) |
390 |
{ |
391 |
$maxid = $row[0] if $maxid eq ''; |
392 |
last if $row[0] > $maxid; |
393 |
my @ids = split(/[ ]+,[ ]+/, $row[1]); |
394 |
foreach my $aid (@ids) |
395 |
{ |
396 |
$active{$aid} = 1 unless exists $active{$aid}; |
397 |
} |
398 |
} |
399 |
if ($maxid eq '') |
400 |
{ |
401 |
print STDERR "No Sync IDs\n" unless ($quiet); |
402 |
return(0); |
403 |
} |
404 |
my $alist = join(',', keys %active); |
405 |
my $sinfo = "logid < $maxid"; |
406 |
$sinfo .= " AND logid not in ($alist)" if $alist ne ''; |
407 |
#if (ref($onlytables) eq 'HASH') { |
408 |
# foreach my $onlytable (keys %{$onlytables}) { |
409 |
# $sinfo |
410 |
# } |
411 |
#} |
412 |
$sql = "delete from _RSERV_LOG_ where " . |
413 |
"logtime < now() - '$howold second'::interval AND $sinfo"; |
414 |
|
415 |
printf "$sql\n" if $debug; |
416 |
|
417 |
$result = $conn->exec($sql); |
418 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
419 |
{ |
420 |
print STDERR $conn->errorMessage unless ($quiet); |
421 |
$conn->exec("ROLLBACK"); |
422 |
return(-1); |
423 |
} |
424 |
$maxid = $result->cmdTuples; |
425 |
|
426 |
$result = $conn->exec("COMMIT"); |
427 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
428 |
{ |
429 |
print STDERR $conn->errorMessage unless ($quiet); |
430 |
$conn->exec("ROLLBACK"); |
431 |
return(-1); |
432 |
} |
433 |
|
434 |
return($maxid); |
435 |
} |
436 |
|
437 |
sub ApplySnapshot |
438 |
{ |
439 |
my ($sconn, $inpf, $onlytables) = @_; # (@_[0], @_[1]); |
440 |
|
441 |
my $result = $sconn->exec("BEGIN"); |
442 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
443 |
{ |
444 |
print STDERR $sconn->errorMessage unless ($quiet); |
445 |
$sconn->exec("ROLLBACK"); |
446 |
return(-1); |
447 |
} |
448 |
|
449 |
$result = $sconn->exec("SET CONSTRAINTS ALL DEFERRED"); |
450 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
451 |
{ |
452 |
print STDERR $sconn->errorMessage unless ($quiet); |
453 |
$sconn->exec("ROLLBACK"); |
454 |
return(-1); |
455 |
} |
456 |
|
457 |
# MAP name --> oid, keyname, keynum |
458 |
my $sql = "select pgc.oid, pgc.relname, pga.attname, rt.key" . |
459 |
" from _RSERV_SLAVE_TABLES_ rt, pg_class pgc, pg_attribute pga" . |
460 |
" where pgc.oid = rt.reloid AND pga.attrelid = rt.reloid" . |
461 |
" AND pga.attnum = rt.key"; |
462 |
|
463 |
$result = $sconn->exec($sql); |
464 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
465 |
{ |
466 |
print STDERR $sconn->errorMessage unless ($quiet); |
467 |
$sconn->exec("ROLLBACK"); |
468 |
return(-1); |
469 |
} |
470 |
%Stables = (); |
471 |
while (my @row = $result->fetchrow) |
472 |
{ |
473 |
# printf "\t%s\t%s\t%s\t\n", $row[1], $row[0], $row[2], $row[3]; |
474 |
if (ref($onlytables) eq 'HASH') { |
475 |
next unless (exists $onlytables->{$row[1]}); |
476 |
$onlytables->{$row[1]} = $row[0] unless ($onlytables->{$row[1]}); |
477 |
} |
478 |
push @{$Stables{$row[1]}}, $row[0], $row[2], $row[3]; |
479 |
} |
480 |
|
481 |
print STDERR "Snapshot tables oids: ",join(",",keys %Stables),"\n" if ($debug); |
482 |
|
483 |
my $ok = 0; |
484 |
my $syncid = -1; |
485 |
while(<$inpf>) |
486 |
{ |
487 |
$_ =~ s/\n//; |
488 |
my ($cmt, $cmd, $prm) = split (/[ ]+/, $_, 3); |
489 |
die "FATAL: snapshot format unknown or snapshot corrupted!" if (! $cmt); |
490 |
if ($cmt ne '--') |
491 |
{ |
492 |
printf STDERR "Invalid format\n" unless ($quiet); |
493 |
$sconn->exec("ROLLBACK"); |
494 |
return(-2); |
495 |
} |
496 |
if ($cmd eq 'DELETE') |
497 |
{ |
498 |
if ($syncid == -1) |
499 |
{ |
500 |
printf STDERR "Sync ID unspecified\n" unless ($quiet); |
501 |
$sconn->exec("ROLLBACK"); |
502 |
return(-2); |
503 |
} |
504 |
$result = DoDelete($sconn, $inpf, $prm); |
505 |
if ($result) |
506 |
{ |
507 |
$sconn->exec("ROLLBACK"); |
508 |
return($result); |
509 |
} |
510 |
} |
511 |
elsif ($cmd eq 'INSERT') |
512 |
{ |
513 |
if ($syncid == -1) |
514 |
{ |
515 |
printf STDERR "Sync ID unspecified\n" unless ($quiet); |
516 |
$sconn->exec("ROLLBACK"); |
517 |
return(-2); |
518 |
} |
519 |
$result = DoInsert($sconn, $inpf, $prm); |
520 |
if ($result) |
521 |
{ |
522 |
$sconn->exec("ROLLBACK"); |
523 |
return($result); |
524 |
} |
525 |
} |
526 |
elsif ($cmd eq 'UPDATE') |
527 |
{ |
528 |
if ($syncid == -1) |
529 |
{ |
530 |
printf STDERR "Sync ID unspecified\n" unless ($quiet); |
531 |
$sconn->exec("ROLLBACK"); |
532 |
return(-2); |
533 |
} |
534 |
$result = DoUpdate($sconn, $inpf, $prm); |
535 |
if ($result) |
536 |
{ |
537 |
$sconn->exec("ROLLBACK"); |
538 |
return($result); |
539 |
} |
540 |
} |
541 |
elsif ($cmd eq 'SYNCID') |
542 |
{ |
543 |
if ($syncid != -1) |
544 |
{ |
545 |
printf STDERR "Second Sync ID ?!\n" unless ($quiet); |
546 |
$sconn->exec("ROLLBACK"); |
547 |
return(-2); |
548 |
} |
549 |
if ($prm !~ /^\d+$/) |
550 |
{ |
551 |
printf STDERR "Invalid Sync ID $prm\n" unless ($quiet); |
552 |
$sconn->exec("ROLLBACK"); |
553 |
return(-2); |
554 |
} |
555 |
$syncid = $prm; |
556 |
|
557 |
printf STDERR "Sync ID $syncid\n" unless ($quiet); |
558 |
|
559 |
$result = $sconn->exec("select syncid, synctime from " . |
560 |
"_RSERV_SLAVE_SYNC_ where syncid = " . |
561 |
"(select max(syncid) from _RSERV_SLAVE_SYNC_)"); |
562 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
563 |
{ |
564 |
print STDERR $sconn->errorMessage unless ($quiet); |
565 |
$sconn->exec("ROLLBACK"); |
566 |
return(-1); |
567 |
} |
568 |
my @row = $result->fetchrow; |
569 |
if (! defined $row[0]) |
570 |
{ |
571 |
$result = $sconn->exec("insert into _RSERV_SLAVE_SYNC_ ". |
572 |
"(syncid, synctime) values ($syncid, now())"); |
573 |
} |
574 |
elsif ($row[0] >= $prm) |
575 |
{ |
576 |
printf STDERR "Sync-ed to ID $row[0] ($row[1])\n" unless ($quiet); |
577 |
$sconn->exec("ROLLBACK"); |
578 |
return(0); |
579 |
} |
580 |
else |
581 |
{ |
582 |
$result = $sconn->exec("update _RSERV_SLAVE_SYNC_" . |
583 |
" set syncid = $syncid, synctime = now()"); |
584 |
} |
585 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
586 |
{ |
587 |
print STDERR $sconn->errorMessage unless ($quiet); |
588 |
$sconn->exec("ROLLBACK"); |
589 |
return(-1); |
590 |
} |
591 |
} |
592 |
elsif ($cmd eq 'OK') |
593 |
{ |
594 |
$ok = 1; |
595 |
last; |
596 |
} |
597 |
elsif ($cmd eq 'ERROR') |
598 |
{ |
599 |
printf STDERR "ERROR signaled\n" unless ($quiet); |
600 |
$sconn->exec("ROLLBACK"); |
601 |
return(-2); |
602 |
} |
603 |
else |
604 |
{ |
605 |
printf STDERR "Unknown command $cmd\n" unless ($quiet); |
606 |
$sconn->exec("ROLLBACK"); |
607 |
return(-2); |
608 |
} |
609 |
} |
610 |
|
611 |
if (! $ok) |
612 |
{ |
613 |
printf STDERR "No OK flag in input\n" unless ($quiet); |
614 |
$sconn->exec("ROLLBACK"); |
615 |
return(-2); |
616 |
} |
617 |
|
618 |
$result = $sconn->exec("COMMIT"); |
619 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
620 |
{ |
621 |
print STDERR $sconn->errorMessage unless ($quiet); |
622 |
$sconn->exec("ROLLBACK"); |
623 |
return(-1); |
624 |
} |
625 |
|
626 |
return(1); |
627 |
} |
628 |
|
629 |
sub DoDelete |
630 |
{ |
631 |
my ($sconn, $inpf, $tabname) = @_; # (@_[0], @_[1], @_[2]); |
632 |
|
633 |
# only delete tables that the slave wants |
634 |
if (! defined($Stables{$tabname})) { |
635 |
print "Not configured to delete rows from table $tabname\n" unless $quiet; |
636 |
while (<$inpf>) { |
637 |
my $istring = $_; |
638 |
$istring =~ s/\n//; |
639 |
last if ($istring eq '\.'); |
640 |
} |
641 |
return(0); |
642 |
} |
643 |
|
644 |
my $ok = 0; |
645 |
while(<$inpf>) |
646 |
{ |
647 |
if ($_ !~ /\n$/) |
648 |
{ |
649 |
printf STDERR "Invalid format\n" unless ($quiet); |
650 |
return(-2); |
651 |
} |
652 |
my $key = $_; |
653 |
$key =~ s/\n//; |
654 |
if ($key eq '\.') |
655 |
{ |
656 |
$ok = 1; |
657 |
last; |
658 |
} |
659 |
|
660 |
my $sql = "delete from \"$tabname\" where ". |
661 |
"\"$Stables{$tabname}->[1]\" = '$key'"; |
662 |
|
663 |
printf "$sql\n" if $debug; |
664 |
|
665 |
my $result = $sconn->exec($sql); |
666 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
667 |
{ |
668 |
print STDERR $sconn->errorMessage unless ($quiet); |
669 |
return(-1); |
670 |
} |
671 |
} |
672 |
|
673 |
if (! $ok) |
674 |
{ |
675 |
printf STDERR "No end of input in DELETE section\n" unless ($quiet); |
676 |
return(-2); |
677 |
} |
678 |
|
679 |
return(0); |
680 |
} |
681 |
|
682 |
|
683 |
sub DoUpdate |
684 |
{ |
685 |
my ($sconn, $inpf, $tabname) = @_; # (@_[0], @_[1], @_[2]); |
686 |
|
687 |
# only update the tables that the slave wants |
688 |
if (! defined($Stables{$tabname})) { |
689 |
print "Not configured to update rows from table $tabname\n" unless $quiet; |
690 |
while (<$inpf>) { |
691 |
my $istring = $_; |
692 |
$istring =~ s/\n//; |
693 |
last if ($istring eq '\.'); |
694 |
} |
695 |
return(0); |
696 |
} |
697 |
|
698 |
my $oidkey = ($Stables{$tabname}->[2] < 0) ? 1 : 0; |
699 |
|
700 |
my @CopyBuf = (); |
701 |
my $CBufLen = 0; |
702 |
my $CBufMax = 16 * 1024 * 1024; # max size of buf for copy |
703 |
|
704 |
my $sql = "select attnum, attname from pg_attribute" . |
705 |
" where attrelid = $Stables{$tabname}->[0] AND attnum > 0"; |
706 |
|
707 |
my $result = $sconn->exec($sql); |
708 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
709 |
{ |
710 |
print STDERR $sconn->errorMessage unless ($quiet); |
711 |
return(-1); |
712 |
} |
713 |
|
714 |
my @anames = (); |
715 |
while (my @row = $result->fetchrow) |
716 |
{ |
717 |
$anames[$row[0]] = $row[1]; |
718 |
} |
719 |
|
720 |
my $istring; |
721 |
my $ok = 0; |
722 |
while(<$inpf>) |
723 |
{ |
724 |
if ($_ !~ /\n$/) |
725 |
{ |
726 |
printf STDERR "Invalid format\n" unless ($quiet); |
727 |
return(-2); |
728 |
} |
729 |
$istring = $_; |
730 |
$istring =~ s/\n//; |
731 |
if ($istring eq '\.') |
732 |
{ |
733 |
$ok = 1; |
734 |
last; |
735 |
} |
736 |
my @vals = split(/ /, $istring); |
737 |
if ($oidkey) |
738 |
{ |
739 |
if ($vals[0] !~ /^\d+$/ || $vals[0] <= 0) |
740 |
{ |
741 |
printf STDERR "Invalid OID\n" unless ($quiet); |
742 |
return(-2); |
743 |
} |
744 |
$oidkey = $vals[0]; |
745 |
} |
746 |
else |
747 |
{ |
748 |
unshift @vals, ''; |
749 |
} |
750 |
|
751 |
$sql = "update \"$tabname\" set "; |
752 |
my $ocnt = 0; |
753 |
for (my $i = 1; $i <= $#anames; $i++) |
754 |
{ |
755 |
if ($vals[$i] eq '\N') |
756 |
{ |
757 |
if ($i == $Stables{$tabname}->[2]) |
758 |
{ |
759 |
printf STDERR "NULL key\n" unless ($quiet); |
760 |
return(-2); |
761 |
} |
762 |
$vals[$i] = 'null'; |
763 |
} |
764 |
else |
765 |
{ |
766 |
$vals[$i] = "'" . $vals[$i] . "'"; |
767 |
next if $i == $Stables{$tabname}->[2]; |
768 |
} |
769 |
$ocnt++; |
770 |
$sql .= ', ' if $ocnt > 1; |
771 |
$sql .= "\"$anames[$i]\" = $vals[$i]"; |
772 |
} |
773 |
if ($oidkey) |
774 |
{ |
775 |
$sql .= " where \"$Stables{$tabname}->[1]\" = $oidkey"; |
776 |
} |
777 |
else |
778 |
{ |
779 |
$sql .= " where \"$Stables{$tabname}->[1]\" = ". |
780 |
$vals[$Stables{$tabname}->[2]]; |
781 |
} |
782 |
|
783 |
printf "$sql\n" if $debug; |
784 |
|
785 |
$result = $sconn->exec($sql); |
786 |
|
787 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
788 |
{ |
789 |
print STDERR $sconn->errorMessage unless ($quiet); |
790 |
return(-1); |
791 |
} |
792 |
next if $result->cmdTuples == 1; # updated |
793 |
|
794 |
if ($result->cmdTuples > 1) |
795 |
{ |
796 |
printf STDERR "Duplicate keys\n" unless ($quiet); |
797 |
return(-2); |
798 |
} |
799 |
|
800 |
# no key - copy |
801 |
push @CopyBuf, "$istring\n"; |
802 |
$CBufLen += length($istring); |
803 |
|
804 |
if ($CBufLen >= $CBufMax) |
805 |
{ |
806 |
$result = DoCopy($sconn, $tabname, $oidkey, \@CopyBuf); |
807 |
return($result) if $result; |
808 |
@CopyBuf = (); |
809 |
$CBufLen = 0; |
810 |
} |
811 |
} |
812 |
|
813 |
if (! $ok) |
814 |
{ |
815 |
printf STDERR "No end of input in UPDATE section\n" unless ($quiet); |
816 |
return(-2); |
817 |
} |
818 |
|
819 |
if ($CBufLen) |
820 |
{ |
821 |
print "@CopyBuf\n" if $debug; |
822 |
$result = DoCopy($sconn, $tabname, $oidkey, \@CopyBuf); |
823 |
return($result) if $result; |
824 |
} |
825 |
|
826 |
return(0); |
827 |
} |
828 |
|
829 |
sub DoInsert |
830 |
{ |
831 |
my ($sconn, $inpf, $tabname) = @_; # (@_[0], @_[1], @_[2]); |
832 |
|
833 |
# only insert rows into tables that the slave wants |
834 |
if (! defined($Stables{$tabname})) { |
835 |
print "Not configured to insert rows from table $tabname\n" unless $quiet; |
836 |
while (<$inpf>) { |
837 |
my $istring = $_; |
838 |
$istring =~ s/\n//; |
839 |
last if ($istring eq '\.'); |
840 |
} |
841 |
return(0); |
842 |
} |
843 |
|
844 |
my $oidkey = ($Stables{$tabname}->[2] < 0) ? 1 : 0; |
845 |
|
846 |
my @CopyBuf = (); |
847 |
my $CBufLen = 0; |
848 |
my $CBufMax = 16 * 1024 * 1024; # max size of buf for copy |
849 |
|
850 |
my $istring; |
851 |
my $ok = 0; |
852 |
while(<$inpf>) |
853 |
{ |
854 |
if ($_ !~ /\n$/) |
855 |
{ |
856 |
printf STDERR "Invalid format\n" unless ($quiet); |
857 |
return(-2); |
858 |
} |
859 |
$istring = $_; |
860 |
$istring =~ s/\n//; |
861 |
if ($istring eq '\.') |
862 |
{ |
863 |
$ok = 1; |
864 |
last; |
865 |
} |
866 |
|
867 |
# no key - copy |
868 |
push @CopyBuf, "$istring\n"; |
869 |
$CBufLen += length($istring); |
870 |
|
871 |
if ($CBufLen >= $CBufMax) |
872 |
{ |
873 |
my $result = DoCopy($sconn, $tabname, $oidkey, \@CopyBuf); |
874 |
return($result) if $result; |
875 |
@CopyBuf = (); |
876 |
$CBufLen = 0; |
877 |
} |
878 |
} |
879 |
|
880 |
if (! $ok) |
881 |
{ |
882 |
printf STDERR "No end of input in INSERT section\n" unless ($quiet); |
883 |
return(-2); |
884 |
} |
885 |
|
886 |
if ($CBufLen) |
887 |
{ |
888 |
print "@CopyBuf\n" if $debug; |
889 |
my $result = DoCopy($sconn, $tabname, $oidkey, \@CopyBuf); |
890 |
return($result) if $result; |
891 |
} |
892 |
|
893 |
return(0); |
894 |
} |
895 |
|
896 |
|
897 |
sub DoCopy |
898 |
{ |
899 |
my ($sconn, $tabname, $withoids, $CBuf) = @_; # (@_[0], @_[1], @_[2], @_[3]); |
900 |
|
901 |
my $sql = "COPY \"$tabname\" " . (($withoids) ? "WITH OIDS " : '') . |
902 |
"FROM STDIN"; |
903 |
my $result = $sconn->exec($sql); |
904 |
if ($result->resultStatus ne PGRES_COPY_IN) |
905 |
{ |
906 |
print STDERR $sconn->errorMessage unless ($quiet); |
907 |
return(-1); |
908 |
} |
909 |
|
910 |
foreach my $str (@{$CBuf}) |
911 |
{ |
912 |
$sconn->putline($str); |
913 |
} |
914 |
|
915 |
$sconn->putline("\\.\n"); |
916 |
|
917 |
if ($sconn->endcopy) |
918 |
{ |
919 |
print STDERR $sconn->errorMessage unless ($quiet); |
920 |
return(-1); |
921 |
} |
922 |
|
923 |
return(0); |
924 |
} |
925 |
|
926 |
|
927 |
# |
928 |
# Returns last SyncID applied on Slave |
929 |
# |
930 |
sub GetSyncID |
931 |
{ |
932 |
my ($sconn) = @_; # (@_[0]); |
933 |
|
934 |
my $result = $sconn->exec("select max(syncid) from _RSERV_SLAVE_SYNC_"); |
935 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
936 |
{ |
937 |
print STDERR $sconn->errorMessage unless ($quiet); |
938 |
return(-1); |
939 |
} |
940 |
my @row = $result->fetchrow; |
941 |
return(undef) unless defined $row[0]; # null |
942 |
return($row[0]); |
943 |
} |
944 |
|
945 |
# |
946 |
# Updates _RSERV_SYNC_ on Master with Slave SyncID |
947 |
# |
948 |
sub SyncSyncID |
949 |
{ |
950 |
my ($mconn, $sserver, $syncid) = @_; # (@_[0], @_[1], @_[2]); |
951 |
|
952 |
my $result = $mconn->exec("BEGIN"); |
953 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
954 |
{ |
955 |
print STDERR $mconn->errorMessage unless ($quiet); |
956 |
$mconn->exec("ROLLBACK"); |
957 |
return(-1); |
958 |
} |
959 |
|
960 |
$result = $mconn->exec("select synctime, status from _RSERV_SYNC_" . |
961 |
" where server = $sserver AND syncid = $syncid" . |
962 |
" for update"); |
963 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
964 |
{ |
965 |
print STDERR $mconn->errorMessage unless ($quiet); |
966 |
$mconn->exec("ROLLBACK"); |
967 |
return(-1); |
968 |
} |
969 |
my @row = $result->fetchrow; |
970 |
if (! defined $row[0]) |
971 |
{ |
972 |
printf STDERR "No SyncID $syncid found for server $sserver\n" unless ($quiet); |
973 |
$mconn->exec("ROLLBACK"); |
974 |
return(0); |
975 |
} |
976 |
if ($row[1] > 0) |
977 |
{ |
978 |
printf STDERR "SyncID $syncid for server ". |
979 |
"$sserver already updated\n" unless ($quiet); |
980 |
$mconn->exec("ROLLBACK"); |
981 |
return(0); |
982 |
} |
983 |
$result = $mconn->exec("update _RSERV_SYNC_" . |
984 |
" set synctime = now(), status = 1" . |
985 |
" where server = $sserver AND syncid = $syncid"); |
986 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
987 |
{ |
988 |
print STDERR $mconn->errorMessage unless ($quiet); |
989 |
$mconn->exec("ROLLBACK"); |
990 |
return(-1); |
991 |
} |
992 |
$result = $mconn->exec("delete from _RSERV_SYNC_" . |
993 |
" where server = $sserver AND syncid < $syncid"); |
994 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
995 |
{ |
996 |
print STDERR $mconn->errorMessage unless ($quiet); |
997 |
$mconn->exec("ROLLBACK"); |
998 |
return(-1); |
999 |
} |
1000 |
|
1001 |
$result = $mconn->exec("COMMIT"); |
1002 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
1003 |
{ |
1004 |
print STDERR $mconn->errorMessage unless ($quiet); |
1005 |
$mconn->exec("ROLLBACK"); |
1006 |
return(-1); |
1007 |
} |
1008 |
|
1009 |
return(1); |
1010 |
} |
1011 |
|
1012 |
# stuff moved from perl scripts for better re-use |
1013 |
|
1014 |
sub Rollback { |
1015 |
my $conn = shift @_; |
1016 |
|
1017 |
print STDERR $conn->errorMessage; |
1018 |
$conn->exec("ROLLBACK"); |
1019 |
} |
1020 |
|
1021 |
sub RollbackAndQuit { |
1022 |
my $conn = shift @_; |
1023 |
|
1024 |
Rollback($conn); |
1025 |
exit (-1); |
1026 |
} |
1027 |
|
1028 |
sub Connect { |
1029 |
my $info = shift @_; |
1030 |
|
1031 |
print("Connecting to $info\n") if ($debug || $verbose); |
1032 |
my $conn = Pg::connectdb($info); |
1033 |
if ($conn->status != PGRES_CONNECTION_OK) { |
1034 |
print STDERR "Failed opening $info\n"; |
1035 |
exit 1; |
1036 |
} |
1037 |
return $conn; |
1038 |
} |
1039 |
|
1040 |
sub Exec { |
1041 |
my $conn = shift @_; |
1042 |
my $sql = shift @_; |
1043 |
|
1044 |
my $result = $conn->exec($sql); |
1045 |
print STDERR "$sql\n" if ($debug); |
1046 |
RollbackAndQuit($conn) if ($result->resultStatus ne PGRES_COMMAND_OK); |
1047 |
} |
1048 |
|
1049 |
sub Exec2 { |
1050 |
my $mconn = shift @_; |
1051 |
my $sconn = shift @_; |
1052 |
my $sql = shift @_; |
1053 |
|
1054 |
my $result = $mconn->exec($sql); |
1055 |
RollbackAndQuit($mconn) if ($result->resultStatus ne PGRES_COMMAND_OK); |
1056 |
$result = $sconn->exec($sql); |
1057 |
RollbackAndQuit($sconn) if ($result->resultStatus ne PGRES_COMMAND_OK); |
1058 |
} |
1059 |
|
1060 |
sub MkInfo { |
1061 |
my $db = shift || die "need database name!"; |
1062 |
my $host = shift; |
1063 |
my $port = shift; |
1064 |
my $user = shift; |
1065 |
my $password = shift; |
1066 |
|
1067 |
my $info = "dbname=$db"; |
1068 |
$info = "$info host=$host" if (defined($host)); |
1069 |
$info = "$info port=$port" if (defined($port)); |
1070 |
$info = "$info user=$user" if (defined($user)); |
1071 |
$info = "$info password=$password" if (defined($password)); |
1072 |
|
1073 |
return $info; |
1074 |
} |
1075 |
|
1076 |
1; |