| 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 MkInfo |
| 11 |
$debug $quiet $verbose |
| 12 |
); |
| 13 |
@EXPORT_OK = qw(); |
| 14 |
use strict; |
| 15 |
use Pg; |
| 16 |
|
| 17 |
my $debug = 0; |
| 18 |
my $quiet = 1; |
| 19 |
my $verbose = 0; |
| 20 |
|
| 21 |
$debug = 1; |
| 22 |
$quiet = 0; |
| 23 |
$verbose = 1; |
| 24 |
|
| 25 |
my %Mtables = (); |
| 26 |
my %Stables = (); |
| 27 |
|
| 28 |
sub GetServerId |
| 29 |
{ |
| 30 |
my ($mconn, $DB, $Host) = @_; # (@_[0], @_[1]. @_[2]); |
| 31 |
|
| 32 |
print STDERR "GetServerId: host $Host, database $DB\n" if ($debug); |
| 33 |
|
| 34 |
my $result = $mconn->exec("SELECT server FROM _RSERV_SERVERS_ WHERE". |
| 35 |
" host='$Host' AND dbase='$DB'"); |
| 36 |
|
| 37 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
| 38 |
{ |
| 39 |
print STDERR $mconn->errorMessage unless ($quiet); |
| 40 |
return(-1); |
| 41 |
} |
| 42 |
|
| 43 |
if ($result->cmdTuples && $result->cmdTuples > 1) |
| 44 |
{ |
| 45 |
printf STDERR "Duplicate host definitions.\n" unless ($quiet); |
| 46 |
return(-2); |
| 47 |
} |
| 48 |
|
| 49 |
my @row = $result->fetchrow; |
| 50 |
|
| 51 |
print "GetServerId($DB,$Host) == $row[0]\n" if ($debug); |
| 52 |
|
| 53 |
return $row[0]; |
| 54 |
} |
| 55 |
|
| 56 |
sub PrepareSnapshot |
| 57 |
{ |
| 58 |
my ($mconn, $sconn, $outf, $mserver, $sserver, $onlytables) = @_; |
| 59 |
|
| 60 |
print STDERR "## d: $debug v: $verbose q: $quiet\n"; |
| 61 |
|
| 62 |
if ($mserver == $sserver) { |
| 63 |
print STDERR "master and slave numbers are same [$mserver] !\n"; |
| 64 |
return(-1); |
| 65 |
} |
| 66 |
|
| 67 |
print "PrepareSnapshot master: $mserver slave: $sserver\n" if ($debug); |
| 68 |
|
| 69 |
# first, we must know for wich tables the slave subscribed |
| 70 |
my $result = $sconn->exec("SELECT tname FROM _RSERV_SLAVE_TABLES_"); |
| 71 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
| 72 |
{ |
| 73 |
print STDERR $mconn->errorMessage unless ($quiet); |
| 74 |
return(-1); |
| 75 |
} |
| 76 |
|
| 77 |
my @row; |
| 78 |
while (@row = $result->fetchrow) { |
| 79 |
$Stables{$row[0]} = 1; |
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} |
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|
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print "Prepare snapshot for tables: ",join(",",keys %Stables),"\n" if ($debug); |
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|
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$result = $mconn->exec("BEGIN"); |
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if ($result->resultStatus ne PGRES_COMMAND_OK) |
| 86 |
{ |
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print STDERR $mconn->errorMessage unless ($quiet); |
| 88 |
$mconn->exec("ROLLBACK"); |
| 89 |
return(-1); |
| 90 |
} |
| 91 |
$result = $mconn->exec("set transaction isolation level serializable"); |
| 92 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
| 93 |
{ |
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print STDERR $mconn->errorMessage unless ($quiet); |
| 95 |
$mconn->exec("ROLLBACK"); |
| 96 |
return(-1); |
| 97 |
} |
| 98 |
|
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# MAP oid --> tabname, keyname, key_type |
| 100 |
$result = $mconn->exec("select pgc.oid, pgc.relname, pga.attname, pgt.typname" . |
| 101 |
" from _RSERV_TABLES_ rt, pg_class pgc, pg_attribute pga" . |
| 102 |
", pg_type pgt". |
| 103 |
" where pgc.oid = rt.reloid AND pga.attrelid = rt.reloid" . |
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" AND pga.attnum = rt.key AND pga.atttypid=pgt.oid"); |
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if ($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); |
| 110 |
} |
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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], $row[3]; |
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} |
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|
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print "Master database table oids: ",join(",",keys %Mtables),"\n" if ($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); |
| 137 |
} |
| 138 |
|
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my @lastsync = $result->fetchrow; |
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print "lastsync: ",join(",",@lastsync),"\n" if ($debug); |
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|
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# exclude data which originated from master server |
| 143 |
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 ''; |
| 150 |
$sinfo .= ")"; |
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} |
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|
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my $havedeal = 0; |
| 154 |
|
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# DELETED rows |
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$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); |
| 162 |
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; |
| 170 |
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, $outf); |
| 180 |
return($syncid) if $syncid < 0; |
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$havedeal = 1; |
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} |
| 183 |
else |
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{ |
| 185 |
printf $outf "\\.\n"; |
| 186 |
} |
| 187 |
printf $outf "-- DELETE $Mtables{$row[0]}[0]\n"; |
| 188 |
$lastoid = $row[0]; |
| 189 |
} |
| 190 |
if (! defined $row[1]) |
| 191 |
{ |
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print STDERR "NULL key\n" unless ($quiet); |
| 193 |
$mconn->exec("ROLLBACK"); |
| 194 |
return(-2); |
| 195 |
} |
| 196 |
printf $outf "%s\n", OutputValue($row[1]); |
| 197 |
} |
| 198 |
printf $outf "\\.\n" if ($lastoid != -1); |
| 199 |
|
| 200 |
# UPDATED rows |
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|
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my ($taboid, $tabname, $tabkey); |
| 203 |
foreach $taboid (keys %Mtables) |
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{ |
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my ($tabname, $tabkey, $keytype) = @{$Mtables{$taboid}}; |
| 206 |
next unless exists $Stables{$tabname}; |
| 207 |
|
| 208 |
my $oidkey = ($tabkey eq 'oid') ? "_$tabname.oid," : ''; |
| 209 |
|
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$sql = sprintf "SELECT $oidkey \"_$tabname\".* FROM \"$tabname\" ". |
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"\"_$tabname\", _RSERV_LOG_ l WHERE l.reloid = $taboid AND l.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); |
| 218 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
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{ |
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printf $outf "-- ERROR\n" if $havedeal; |
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print STDERR $mconn->errorMessage unless ($quiet); |
| 222 |
$mconn->exec("ROLLBACK"); |
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return(-1); |
| 224 |
} |
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next if $result->ntuples <= 0; |
| 226 |
if (! $havedeal) |
| 227 |
{ |
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my $syncid = GetSYNCID($mconn, $outf); |
| 229 |
return($syncid) if $syncid < 0; |
| 230 |
$havedeal = 1; |
| 231 |
} |
| 232 |
printf $outf "-- UPDATE $tabname\n"; |
| 233 |
printf "-- UPDATE $tabname\n" if $debug; |
| 234 |
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[$i]); |
| 241 |
printf "%s", OutputValue($row[$i]) if $debug;; |
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} |
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printf $outf "\n"; |
| 244 |
printf "\n" if $debug; |
| 245 |
} |
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printf $outf "\\.\n"; |
| 247 |
printf "\\.\n" if $debug;; |
| 248 |
} |
| 249 |
|
| 250 |
# INSERTED rows |
| 251 |
|
| 252 |
foreach $taboid (keys %Mtables) |
| 253 |
{ |
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my ($tabname, $tabkey, $keytype) = @{$Mtables{$taboid}}; |
| 255 |
next unless exists $Stables{$tabname}; |
| 256 |
|
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my $oidkey = ($tabkey eq 'oid') ? "_$tabname.oid," : ''; |
| 258 |
|
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$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); |
| 267 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
| 268 |
{ |
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printf $outf "-- ERROR\n" if $havedeal; |
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print STDERR $mconn->errorMessage unless ($quiet); |
| 271 |
$mconn->exec("ROLLBACK"); |
| 272 |
return(-1); |
| 273 |
} |
| 274 |
next if $result->ntuples <= 0; |
| 275 |
if (! $havedeal) |
| 276 |
{ |
| 277 |
my $syncid = GetSYNCID($mconn, $outf); |
| 278 |
return($syncid) if $syncid < 0; |
| 279 |
$havedeal = 1; |
| 280 |
} |
| 281 |
printf $outf "-- INSERT $tabname\n"; |
| 282 |
printf "-- INSERT $tabname\n" if $debug; |
| 283 |
while (@row = $result->fetchrow) |
| 284 |
{ |
| 285 |
for (my $i = 0; $i <= $#row; $i++) |
| 286 |
{ |
| 287 |
printf $outf " " if $i; |
| 288 |
printf " " if $i && $debug; |
| 289 |
printf $outf "%s", OutputValue($row[$i]); |
| 290 |
printf "%s", OutputValue($row[$i]) if $debug;; |
| 291 |
} |
| 292 |
printf $outf "\n"; |
| 293 |
printf "\n" if $debug; |
| 294 |
} |
| 295 |
printf $outf "\\.\n"; |
| 296 |
printf "\\.\n" if $debug;; |
| 297 |
} |
| 298 |
|
| 299 |
|
| 300 |
unless ($havedeal) |
| 301 |
{ |
| 302 |
$mconn->exec("ROLLBACK"); |
| 303 |
return(0); |
| 304 |
} |
| 305 |
|
| 306 |
# Remember this snapshot info |
| 307 |
$result = $mconn->exec("select _rserv_sync_($sserver)"); |
| 308 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
| 309 |
{ |
| 310 |
printf $outf "-- ERROR\n"; |
| 311 |
print STDERR $mconn->errorMessage unless ($quiet); |
| 312 |
$mconn->exec("ROLLBACK"); |
| 313 |
return(-1); |
| 314 |
} |
| 315 |
|
| 316 |
$result = $mconn->exec("COMMIT"); |
| 317 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
| 318 |
{ |
| 319 |
printf $outf "-- ERROR\n"; |
| 320 |
print STDERR $mconn->errorMessage unless ($quiet); |
| 321 |
$mconn->exec("ROLLBACK"); |
| 322 |
return(-1); |
| 323 |
} |
| 324 |
printf $outf "-- OK\n"; |
| 325 |
printf "-- OK\n" if $debug; |
| 326 |
|
| 327 |
return(1); |
| 328 |
|
| 329 |
} |
| 330 |
|
| 331 |
sub OutputValue |
| 332 |
{ |
| 333 |
my ($val) = @_; # @_[0]; |
| 334 |
|
| 335 |
return("\\N") unless defined $val; |
| 336 |
|
| 337 |
$val =~ s/\\/\\\\/g; |
| 338 |
$val =~ s/ /\\011/g; |
| 339 |
$val =~ s/\n/\\012/g; |
| 340 |
$val =~ s/\'/\\047/g; |
| 341 |
|
| 342 |
return($val); |
| 343 |
} |
| 344 |
|
| 345 |
# Get syncid for new snapshot |
| 346 |
sub GetSYNCID |
| 347 |
{ |
| 348 |
my ($conn, $outf) = @_; # (@_[0], @_[1]); |
| 349 |
|
| 350 |
my $result = $conn->exec("select nextval('_rserv_sync_seq_')"); |
| 351 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
| 352 |
{ |
| 353 |
print STDERR $conn->errorMessage unless ($quiet); |
| 354 |
$conn->exec("ROLLBACK"); |
| 355 |
return(-1); |
| 356 |
} |
| 357 |
|
| 358 |
my @row = $result->fetchrow; |
| 359 |
|
| 360 |
printf $outf "-- SYNCID $row[0]\n"; |
| 361 |
printf "-- SYNCID $row[0]\n" if $debug; |
| 362 |
return($row[0]); |
| 363 |
} |
| 364 |
|
| 365 |
|
| 366 |
sub CleanLog |
| 367 |
{ |
| 368 |
my ($conn, $howold, $onlytables) = @_; # (@_[0], @_[1]); |
| 369 |
|
| 370 |
my $result = $conn->exec("BEGIN"); |
| 371 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
| 372 |
{ |
| 373 |
print STDERR $conn->errorMessage unless ($quiet); |
| 374 |
$conn->exec("ROLLBACK"); |
| 375 |
return(-1); |
| 376 |
} |
| 377 |
|
| 378 |
my $sql = "select rs.maxid, rs.active from _RSERV_SYNC_ rs" . |
| 379 |
" where rs.syncid = (select max(rs2.syncid) from _RSERV_SYNC_ rs2" . |
| 380 |
" where rs2.server = rs.server AND rs2.status > 0) order by rs.maxid"; |
| 381 |
|
| 382 |
printf "$sql\n" if $debug; |
| 383 |
|
| 384 |
$result = $conn->exec($sql); |
| 385 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
| 386 |
{ |
| 387 |
print STDERR $conn->errorMessage unless ($quiet); |
| 388 |
return(-1); |
| 389 |
} |
| 390 |
my $maxid = ''; |
| 391 |
my %active = (); |
| 392 |
while (my @row = $result->fetchrow) |
| 393 |
{ |
| 394 |
$maxid = $row[0] if $maxid eq ''; |
| 395 |
last if $row[0] > $maxid; |
| 396 |
my @ids = split(/[ ]+,[ ]+/, $row[1]); |
| 397 |
foreach my $aid (@ids) |
| 398 |
{ |
| 399 |
$active{$aid} = 1 unless exists $active{$aid}; |
| 400 |
} |
| 401 |
} |
| 402 |
if ($maxid eq '') |
| 403 |
{ |
| 404 |
print STDERR "No Sync IDs\n" unless ($quiet); |
| 405 |
return(0); |
| 406 |
} |
| 407 |
my $alist = join(',', keys %active); |
| 408 |
my $sinfo = "logid < $maxid"; |
| 409 |
$sinfo .= " AND logid not in ($alist)" if $alist ne ''; |
| 410 |
#if (ref($onlytables) eq 'HASH') { |
| 411 |
# foreach my $onlytable (keys %{$onlytables}) { |
| 412 |
# $sinfo |
| 413 |
# } |
| 414 |
#} |
| 415 |
$sql = "delete from _RSERV_LOG_ where " . |
| 416 |
"logtime < now() - '$howold second'::interval AND $sinfo"; |
| 417 |
|
| 418 |
printf "$sql\n" if $debug; |
| 419 |
|
| 420 |
$result = $conn->exec($sql); |
| 421 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
| 422 |
{ |
| 423 |
print STDERR $conn->errorMessage unless ($quiet); |
| 424 |
$conn->exec("ROLLBACK"); |
| 425 |
return(-1); |
| 426 |
} |
| 427 |
$maxid = $result->cmdTuples; |
| 428 |
|
| 429 |
$result = $conn->exec("COMMIT"); |
| 430 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
| 431 |
{ |
| 432 |
print STDERR $conn->errorMessage unless ($quiet); |
| 433 |
$conn->exec("ROLLBACK"); |
| 434 |
return(-1); |
| 435 |
} |
| 436 |
|
| 437 |
return($maxid); |
| 438 |
} |
| 439 |
|
| 440 |
sub ApplySnapshot |
| 441 |
{ |
| 442 |
my ($sconn, $inpf, $onlytables) = @_; # (@_[0], @_[1]); |
| 443 |
|
| 444 |
my $result = $sconn->exec("BEGIN"); |
| 445 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
| 446 |
{ |
| 447 |
print STDERR $sconn->errorMessage unless ($quiet); |
| 448 |
$sconn->exec("ROLLBACK"); |
| 449 |
return(-1); |
| 450 |
} |
| 451 |
|
| 452 |
$result = $sconn->exec("SET CONSTRAINTS ALL DEFERRED"); |
| 453 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
| 454 |
{ |
| 455 |
print STDERR $sconn->errorMessage unless ($quiet); |
| 456 |
$sconn->exec("ROLLBACK"); |
| 457 |
return(-1); |
| 458 |
} |
| 459 |
|
| 460 |
# MAP name --> oid, keyname, keynum |
| 461 |
my $sql = "select pgc.oid, pgc.relname, pga.attname, rt.key" . |
| 462 |
" from _RSERV_SLAVE_TABLES_ rt, pg_class pgc, pg_attribute pga" . |
| 463 |
" where pgc.oid = rt.reloid AND pga.attrelid = rt.reloid" . |
| 464 |
" AND pga.attnum = rt.key"; |
| 465 |
|
| 466 |
$result = $sconn->exec($sql); |
| 467 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
| 468 |
{ |
| 469 |
print STDERR $sconn->errorMessage unless ($quiet); |
| 470 |
$sconn->exec("ROLLBACK"); |
| 471 |
return(-1); |
| 472 |
} |
| 473 |
%Stables = (); |
| 474 |
while (my @row = $result->fetchrow) |
| 475 |
{ |
| 476 |
# printf "\t%s\t%s\t%s\t\n", $row[1], $row[0], $row[2], $row[3]; |
| 477 |
if (ref($onlytables) eq 'HASH') { |
| 478 |
next unless (exists $onlytables->{$row[1]}); |
| 479 |
$onlytables->{$row[1]} = $row[0] unless ($onlytables->{$row[1]}); |
| 480 |
} |
| 481 |
push @{$Stables{$row[1]}}, $row[0], $row[2], $row[3]; |
| 482 |
} |
| 483 |
|
| 484 |
print STDERR "Snapshot tables oids: ",join(",",keys %Stables),"\n" if ($debug); |
| 485 |
|
| 486 |
my $ok = 0; |
| 487 |
my $syncid = -1; |
| 488 |
while(<$inpf>) |
| 489 |
{ |
| 490 |
$_ =~ s/\n//; |
| 491 |
my ($cmt, $cmd, $prm) = split (/[ ]+/, $_, 3); |
| 492 |
die "FATAL: snapshot format unknown or snapshot corrupted!" if (! $cmt); |
| 493 |
if ($cmt ne '--') |
| 494 |
{ |
| 495 |
printf STDERR "Invalid format\n" unless ($quiet); |
| 496 |
$sconn->exec("ROLLBACK"); |
| 497 |
return(-2); |
| 498 |
} |
| 499 |
if ($cmd eq 'DELETE') |
| 500 |
{ |
| 501 |
if ($syncid == -1) |
| 502 |
{ |
| 503 |
printf STDERR "Sync ID unspecified\n" unless ($quiet); |
| 504 |
$sconn->exec("ROLLBACK"); |
| 505 |
return(-2); |
| 506 |
} |
| 507 |
$result = DoDelete($sconn, $inpf, $prm); |
| 508 |
if ($result) |
| 509 |
{ |
| 510 |
$sconn->exec("ROLLBACK"); |
| 511 |
return($result); |
| 512 |
} |
| 513 |
} |
| 514 |
elsif ($cmd eq 'INSERT') |
| 515 |
{ |
| 516 |
if ($syncid == -1) |
| 517 |
{ |
| 518 |
printf STDERR "Sync ID unspecified\n" unless ($quiet); |
| 519 |
$sconn->exec("ROLLBACK"); |
| 520 |
return(-2); |
| 521 |
} |
| 522 |
$result = DoInsert($sconn, $inpf, $prm); |
| 523 |
if ($result) |
| 524 |
{ |
| 525 |
$sconn->exec("ROLLBACK"); |
| 526 |
return($result); |
| 527 |
} |
| 528 |
} |
| 529 |
elsif ($cmd eq 'UPDATE') |
| 530 |
{ |
| 531 |
if ($syncid == -1) |
| 532 |
{ |
| 533 |
printf STDERR "Sync ID unspecified\n" unless ($quiet); |
| 534 |
$sconn->exec("ROLLBACK"); |
| 535 |
return(-2); |
| 536 |
} |
| 537 |
$result = DoUpdate($sconn, $inpf, $prm); |
| 538 |
if ($result) |
| 539 |
{ |
| 540 |
$sconn->exec("ROLLBACK"); |
| 541 |
return($result); |
| 542 |
} |
| 543 |
} |
| 544 |
elsif ($cmd eq 'SYNCID') |
| 545 |
{ |
| 546 |
if ($syncid != -1) |
| 547 |
{ |
| 548 |
printf STDERR "Second Sync ID ?!\n" unless ($quiet); |
| 549 |
$sconn->exec("ROLLBACK"); |
| 550 |
return(-2); |
| 551 |
} |
| 552 |
if ($prm !~ /^\d+$/) |
| 553 |
{ |
| 554 |
printf STDERR "Invalid Sync ID $prm\n" unless ($quiet); |
| 555 |
$sconn->exec("ROLLBACK"); |
| 556 |
return(-2); |
| 557 |
} |
| 558 |
$syncid = $prm; |
| 559 |
|
| 560 |
printf STDERR "Sync ID $syncid\n" unless ($quiet); |
| 561 |
|
| 562 |
$result = $sconn->exec("select syncid, synctime from " . |
| 563 |
"_RSERV_SLAVE_SYNC_ where syncid = " . |
| 564 |
"(select max(syncid) from _RSERV_SLAVE_SYNC_)"); |
| 565 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
| 566 |
{ |
| 567 |
print STDERR $sconn->errorMessage unless ($quiet); |
| 568 |
$sconn->exec("ROLLBACK"); |
| 569 |
return(-1); |
| 570 |
} |
| 571 |
my @row = $result->fetchrow; |
| 572 |
if (! defined $row[0]) |
| 573 |
{ |
| 574 |
$result = $sconn->exec("insert into _RSERV_SLAVE_SYNC_ ". |
| 575 |
"(syncid, synctime) values ($syncid, now())"); |
| 576 |
} |
| 577 |
elsif ($row[0] >= $prm) |
| 578 |
{ |
| 579 |
printf STDERR "Sync-ed to ID $row[0] ($row[1])\n" unless ($quiet); |
| 580 |
$sconn->exec("ROLLBACK"); |
| 581 |
return(0); |
| 582 |
} |
| 583 |
else |
| 584 |
{ |
| 585 |
$result = $sconn->exec("update _RSERV_SLAVE_SYNC_" . |
| 586 |
" set syncid = $syncid, synctime = now()"); |
| 587 |
} |
| 588 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
| 589 |
{ |
| 590 |
print STDERR $sconn->errorMessage unless ($quiet); |
| 591 |
$sconn->exec("ROLLBACK"); |
| 592 |
return(-1); |
| 593 |
} |
| 594 |
} |
| 595 |
elsif ($cmd eq 'OK') |
| 596 |
{ |
| 597 |
$ok = 1; |
| 598 |
last; |
| 599 |
} |
| 600 |
elsif ($cmd eq 'ERROR') |
| 601 |
{ |
| 602 |
printf STDERR "ERROR signaled\n" unless ($quiet); |
| 603 |
$sconn->exec("ROLLBACK"); |
| 604 |
return(-2); |
| 605 |
} |
| 606 |
else |
| 607 |
{ |
| 608 |
printf STDERR "Unknown command $cmd\n" unless ($quiet); |
| 609 |
$sconn->exec("ROLLBACK"); |
| 610 |
return(-2); |
| 611 |
} |
| 612 |
} |
| 613 |
|
| 614 |
if (! $ok) |
| 615 |
{ |
| 616 |
printf STDERR "No OK flag in input\n" unless ($quiet); |
| 617 |
$sconn->exec("ROLLBACK"); |
| 618 |
return(-2); |
| 619 |
} |
| 620 |
|
| 621 |
$result = $sconn->exec("COMMIT"); |
| 622 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
| 623 |
{ |
| 624 |
print STDERR $sconn->errorMessage unless ($quiet); |
| 625 |
$sconn->exec("ROLLBACK"); |
| 626 |
return(-1); |
| 627 |
} |
| 628 |
|
| 629 |
return(1); |
| 630 |
} |
| 631 |
|
| 632 |
sub DoDelete |
| 633 |
{ |
| 634 |
my ($sconn, $inpf, $tabname) = @_; # (@_[0], @_[1], @_[2]); |
| 635 |
|
| 636 |
# only delete tables that the slave wants |
| 637 |
if (! defined($Stables{$tabname})) { |
| 638 |
print "Not configured to delete rows from table $tabname\n" unless $quiet; |
| 639 |
while (<$inpf>) { |
| 640 |
my $istring = $_; |
| 641 |
$istring =~ s/\n//; |
| 642 |
last if ($istring eq '\.'); |
| 643 |
} |
| 644 |
return(0); |
| 645 |
} |
| 646 |
|
| 647 |
my $ok = 0; |
| 648 |
while(<$inpf>) |
| 649 |
{ |
| 650 |
if ($_ !~ /\n$/) |
| 651 |
{ |
| 652 |
printf STDERR "Invalid format\n" unless ($quiet); |
| 653 |
return(-2); |
| 654 |
} |
| 655 |
my $key = $_; |
| 656 |
$key =~ s/\n//; |
| 657 |
if ($key eq '\.') |
| 658 |
{ |
| 659 |
$ok = 1; |
| 660 |
last; |
| 661 |
} |
| 662 |
|
| 663 |
my $sql = "delete from \"$tabname\" where ". |
| 664 |
"\"$Stables{$tabname}->[1]\" = '$key'"; |
| 665 |
|
| 666 |
printf "$sql\n" if $debug; |
| 667 |
|
| 668 |
my $result = $sconn->exec($sql); |
| 669 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
| 670 |
{ |
| 671 |
print STDERR $sconn->errorMessage unless ($quiet); |
| 672 |
return(-1); |
| 673 |
} |
| 674 |
} |
| 675 |
|
| 676 |
if (! $ok) |
| 677 |
{ |
| 678 |
printf STDERR "No end of input in DELETE section\n" unless ($quiet); |
| 679 |
return(-2); |
| 680 |
} |
| 681 |
|
| 682 |
return(0); |
| 683 |
} |
| 684 |
|
| 685 |
|
| 686 |
sub DoUpdate |
| 687 |
{ |
| 688 |
my ($sconn, $inpf, $tabname) = @_; # (@_[0], @_[1], @_[2]); |
| 689 |
|
| 690 |
# only update the tables that the slave wants |
| 691 |
if (! defined($Stables{$tabname})) { |
| 692 |
print "Not configured to update rows from table $tabname\n" unless $quiet; |
| 693 |
while (<$inpf>) { |
| 694 |
my $istring = $_; |
| 695 |
$istring =~ s/\n//; |
| 696 |
last if ($istring eq '\.'); |
| 697 |
} |
| 698 |
return(0); |
| 699 |
} |
| 700 |
|
| 701 |
my $oidkey = ($Stables{$tabname}->[2] < 0) ? 1 : 0; |
| 702 |
|
| 703 |
my @CopyBuf = (); |
| 704 |
my $CBufLen = 0; |
| 705 |
my $CBufMax = 16 * 1024 * 1024; # max size of buf for copy |
| 706 |
|
| 707 |
my $sql = "select attnum, attname from pg_attribute" . |
| 708 |
" where attrelid = $Stables{$tabname}->[0] AND attnum > 0"; |
| 709 |
|
| 710 |
my $result = $sconn->exec($sql); |
| 711 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
| 712 |
{ |
| 713 |
print STDERR $sconn->errorMessage unless ($quiet); |
| 714 |
return(-1); |
| 715 |
} |
| 716 |
|
| 717 |
my @anames = (); |
| 718 |
while (my @row = $result->fetchrow) |
| 719 |
{ |
| 720 |
$anames[$row[0]] = $row[1]; |
| 721 |
} |
| 722 |
|
| 723 |
my $istring; |
| 724 |
my $ok = 0; |
| 725 |
while(<$inpf>) |
| 726 |
{ |
| 727 |
if ($_ !~ /\n$/) |
| 728 |
{ |
| 729 |
printf STDERR "Invalid format\n" unless ($quiet); |
| 730 |
return(-2); |
| 731 |
} |
| 732 |
$istring = $_; |
| 733 |
$istring =~ s/\n//; |
| 734 |
if ($istring eq '\.') |
| 735 |
{ |
| 736 |
$ok = 1; |
| 737 |
last; |
| 738 |
} |
| 739 |
my @vals = split(/ /, $istring); |
| 740 |
if ($oidkey) |
| 741 |
{ |
| 742 |
if ($vals[0] !~ /^\d+$/ || $vals[0] <= 0) |
| 743 |
{ |
| 744 |
printf STDERR "Invalid OID\n" unless ($quiet); |
| 745 |
return(-2); |
| 746 |
} |
| 747 |
$oidkey = $vals[0]; |
| 748 |
} |
| 749 |
else |
| 750 |
{ |
| 751 |
unshift @vals, ''; |
| 752 |
} |
| 753 |
|
| 754 |
$sql = "update \"$tabname\" set "; |
| 755 |
my $ocnt = 0; |
| 756 |
for (my $i = 1; $i <= $#anames; $i++) |
| 757 |
{ |
| 758 |
if ($vals[$i] eq '\N') |
| 759 |
{ |
| 760 |
if ($i == $Stables{$tabname}->[2]) |
| 761 |
{ |
| 762 |
printf STDERR "NULL key\n" unless ($quiet); |
| 763 |
return(-2); |
| 764 |
} |
| 765 |
$vals[$i] = 'null'; |
| 766 |
} |
| 767 |
else |
| 768 |
{ |
| 769 |
$vals[$i] = "'" . $vals[$i] . "'"; |
| 770 |
next if $i == $Stables{$tabname}->[2]; |
| 771 |
} |
| 772 |
$ocnt++; |
| 773 |
$sql .= ', ' if $ocnt > 1; |
| 774 |
$sql .= "\"$anames[$i]\" = $vals[$i]"; |
| 775 |
} |
| 776 |
if ($oidkey) |
| 777 |
{ |
| 778 |
$sql .= " where \"$Stables{$tabname}->[1]\" = $oidkey"; |
| 779 |
} |
| 780 |
else |
| 781 |
{ |
| 782 |
$sql .= " where \"$Stables{$tabname}->[1]\" = ". |
| 783 |
$vals[$Stables{$tabname}->[2]]; |
| 784 |
} |
| 785 |
|
| 786 |
printf "$sql\n" if $debug; |
| 787 |
|
| 788 |
$result = $sconn->exec($sql); |
| 789 |
|
| 790 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
| 791 |
{ |
| 792 |
print STDERR $sconn->errorMessage unless ($quiet); |
| 793 |
return(-1); |
| 794 |
} |
| 795 |
next if $result->cmdTuples == 1; # updated |
| 796 |
|
| 797 |
if ($result->cmdTuples > 1) |
| 798 |
{ |
| 799 |
printf STDERR "Duplicate keys\n" unless ($quiet); |
| 800 |
return(-2); |
| 801 |
} |
| 802 |
|
| 803 |
# no key - copy |
| 804 |
push @CopyBuf, "$istring\n"; |
| 805 |
$CBufLen += length($istring); |
| 806 |
|
| 807 |
if ($CBufLen >= $CBufMax) |
| 808 |
{ |
| 809 |
$result = DoCopy($sconn, $tabname, $oidkey, \@CopyBuf); |
| 810 |
return($result) if $result; |
| 811 |
@CopyBuf = (); |
| 812 |
$CBufLen = 0; |
| 813 |
} |
| 814 |
} |
| 815 |
|
| 816 |
if (! $ok) |
| 817 |
{ |
| 818 |
printf STDERR "No end of input in UPDATE section\n" unless ($quiet); |
| 819 |
return(-2); |
| 820 |
} |
| 821 |
|
| 822 |
if ($CBufLen) |
| 823 |
{ |
| 824 |
print "@CopyBuf\n" if $debug; |
| 825 |
$result = DoCopy($sconn, $tabname, $oidkey, \@CopyBuf); |
| 826 |
return($result) if $result; |
| 827 |
} |
| 828 |
|
| 829 |
return(0); |
| 830 |
} |
| 831 |
|
| 832 |
sub DoInsert |
| 833 |
{ |
| 834 |
my ($sconn, $inpf, $tabname) = @_; # (@_[0], @_[1], @_[2]); |
| 835 |
|
| 836 |
# only insert rows into tables that the slave wants |
| 837 |
if (! defined($Stables{$tabname})) { |
| 838 |
print "Not configured to insert rows from table $tabname\n" unless $quiet; |
| 839 |
while (<$inpf>) { |
| 840 |
my $istring = $_; |
| 841 |
$istring =~ s/\n//; |
| 842 |
last if ($istring eq '\.'); |
| 843 |
} |
| 844 |
return(0); |
| 845 |
} |
| 846 |
|
| 847 |
my $oidkey = ($Stables{$tabname}->[2] < 0) ? 1 : 0; |
| 848 |
|
| 849 |
my @CopyBuf = (); |
| 850 |
my $CBufLen = 0; |
| 851 |
my $CBufMax = 16 * 1024 * 1024; # max size of buf for copy |
| 852 |
|
| 853 |
my $istring; |
| 854 |
my $ok = 0; |
| 855 |
while(<$inpf>) |
| 856 |
{ |
| 857 |
if ($_ !~ /\n$/) |
| 858 |
{ |
| 859 |
printf STDERR "Invalid format\n" unless ($quiet); |
| 860 |
return(-2); |
| 861 |
} |
| 862 |
$istring = $_; |
| 863 |
$istring =~ s/\n//; |
| 864 |
if ($istring eq '\.') |
| 865 |
{ |
| 866 |
$ok = 1; |
| 867 |
last; |
| 868 |
} |
| 869 |
|
| 870 |
# no key - copy |
| 871 |
push @CopyBuf, "$istring\n"; |
| 872 |
$CBufLen += length($istring); |
| 873 |
|
| 874 |
if ($CBufLen >= $CBufMax) |
| 875 |
{ |
| 876 |
my $result = DoCopy($sconn, $tabname, $oidkey, \@CopyBuf); |
| 877 |
return($result) if $result; |
| 878 |
@CopyBuf = (); |
| 879 |
$CBufLen = 0; |
| 880 |
} |
| 881 |
} |
| 882 |
|
| 883 |
if (! $ok) |
| 884 |
{ |
| 885 |
printf STDERR "No end of input in INSERT section\n" unless ($quiet); |
| 886 |
return(-2); |
| 887 |
} |
| 888 |
|
| 889 |
if ($CBufLen) |
| 890 |
{ |
| 891 |
print "@CopyBuf\n" if $debug; |
| 892 |
my $result = DoCopy($sconn, $tabname, $oidkey, \@CopyBuf); |
| 893 |
return($result) if $result; |
| 894 |
} |
| 895 |
|
| 896 |
return(0); |
| 897 |
} |
| 898 |
|
| 899 |
|
| 900 |
sub DoCopy |
| 901 |
{ |
| 902 |
my ($sconn, $tabname, $withoids, $CBuf) = @_; # (@_[0], @_[1], @_[2], @_[3]); |
| 903 |
|
| 904 |
my $sql = "COPY \"$tabname\" " . (($withoids) ? "WITH OIDS " : '') . |
| 905 |
"FROM STDIN"; |
| 906 |
my $result = $sconn->exec($sql); |
| 907 |
if ($result->resultStatus ne PGRES_COPY_IN) |
| 908 |
{ |
| 909 |
print STDERR $sconn->errorMessage unless ($quiet); |
| 910 |
return(-1); |
| 911 |
} |
| 912 |
|
| 913 |
foreach my $str (@{$CBuf}) |
| 914 |
{ |
| 915 |
$sconn->putline($str); |
| 916 |
} |
| 917 |
|
| 918 |
$sconn->putline("\\.\n"); |
| 919 |
|
| 920 |
if ($sconn->endcopy) |
| 921 |
{ |
| 922 |
print STDERR $sconn->errorMessage unless ($quiet); |
| 923 |
return(-1); |
| 924 |
} |
| 925 |
|
| 926 |
return(0); |
| 927 |
} |
| 928 |
|
| 929 |
|
| 930 |
# |
| 931 |
# Returns last SyncID applied on Slave |
| 932 |
# |
| 933 |
sub GetSyncID |
| 934 |
{ |
| 935 |
my ($sconn) = @_; # (@_[0]); |
| 936 |
|
| 937 |
my $result = $sconn->exec("select max(syncid) from _RSERV_SLAVE_SYNC_"); |
| 938 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
| 939 |
{ |
| 940 |
print STDERR $sconn->errorMessage unless ($quiet); |
| 941 |
return(-1); |
| 942 |
} |
| 943 |
my @row = $result->fetchrow; |
| 944 |
return(undef) unless defined $row[0]; # null |
| 945 |
return($row[0]); |
| 946 |
} |
| 947 |
|
| 948 |
# |
| 949 |
# Updates _RSERV_SYNC_ on Master with Slave SyncID |
| 950 |
# |
| 951 |
sub SyncSyncID |
| 952 |
{ |
| 953 |
my ($mconn, $sserver, $syncid) = @_; # (@_[0], @_[1], @_[2]); |
| 954 |
|
| 955 |
my $result = $mconn->exec("BEGIN"); |
| 956 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
| 957 |
{ |
| 958 |
print STDERR $mconn->errorMessage unless ($quiet); |
| 959 |
$mconn->exec("ROLLBACK"); |
| 960 |
return(-1); |
| 961 |
} |
| 962 |
|
| 963 |
$result = $mconn->exec("select synctime, status from _RSERV_SYNC_" . |
| 964 |
" where server = $sserver AND syncid = $syncid" . |
| 965 |
" for update"); |
| 966 |
if ($result->resultStatus ne PGRES_TUPLES_OK) |
| 967 |
{ |
| 968 |
print STDERR $mconn->errorMessage unless ($quiet); |
| 969 |
$mconn->exec("ROLLBACK"); |
| 970 |
return(-1); |
| 971 |
} |
| 972 |
my @row = $result->fetchrow; |
| 973 |
if (! defined $row[0]) |
| 974 |
{ |
| 975 |
printf STDERR "No SyncID $syncid found for server $sserver\n" unless ($quiet); |
| 976 |
$mconn->exec("ROLLBACK"); |
| 977 |
return(0); |
| 978 |
} |
| 979 |
if ($row[1] > 0) |
| 980 |
{ |
| 981 |
printf STDERR "SyncID $syncid for server ". |
| 982 |
"$sserver already updated\n" unless ($quiet); |
| 983 |
$mconn->exec("ROLLBACK"); |
| 984 |
return(0); |
| 985 |
} |
| 986 |
$result = $mconn->exec("update _RSERV_SYNC_" . |
| 987 |
" set synctime = now(), status = 1" . |
| 988 |
" where server = $sserver AND syncid = $syncid"); |
| 989 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
| 990 |
{ |
| 991 |
print STDERR $mconn->errorMessage unless ($quiet); |
| 992 |
$mconn->exec("ROLLBACK"); |
| 993 |
return(-1); |
| 994 |
} |
| 995 |
$result = $mconn->exec("delete from _RSERV_SYNC_" . |
| 996 |
" where server = $sserver AND syncid < $syncid"); |
| 997 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
| 998 |
{ |
| 999 |
print STDERR $mconn->errorMessage unless ($quiet); |
| 1000 |
$mconn->exec("ROLLBACK"); |
| 1001 |
return(-1); |
| 1002 |
} |
| 1003 |
|
| 1004 |
$result = $mconn->exec("COMMIT"); |
| 1005 |
if ($result->resultStatus ne PGRES_COMMAND_OK) |
| 1006 |
{ |
| 1007 |
print STDERR $mconn->errorMessage unless ($quiet); |
| 1008 |
$mconn->exec("ROLLBACK"); |
| 1009 |
return(-1); |
| 1010 |
} |
| 1011 |
|
| 1012 |
return(1); |
| 1013 |
} |
| 1014 |
|
| 1015 |
# stuff moved from perl scripts for better re-use |
| 1016 |
|
| 1017 |
sub Rollback { |
| 1018 |
my $conn = shift @_; |
| 1019 |
|
| 1020 |
print STDERR $conn->errorMessage; |
| 1021 |
$conn->exec("ROLLBACK"); |
| 1022 |
} |
| 1023 |
|
| 1024 |
sub RollbackAndQuit { |
| 1025 |
my $conn = shift @_; |
| 1026 |
|
| 1027 |
Rollback($conn); |
| 1028 |
exit (-1); |
| 1029 |
} |
| 1030 |
|
| 1031 |
sub Connect { |
| 1032 |
my $info = shift @_; |
| 1033 |
|
| 1034 |
print("Connecting to $info\n") if ($debug || $verbose); |
| 1035 |
my $conn = Pg::connectdb($info); |
| 1036 |
if ($conn->status != PGRES_CONNECTION_OK) { |
| 1037 |
print STDERR "Failed opening $info\n"; |
| 1038 |
exit 1; |
| 1039 |
} |
| 1040 |
return $conn; |
| 1041 |
} |
| 1042 |
|
| 1043 |
sub Exec { |
| 1044 |
my $conn = shift @_; |
| 1045 |
my $sql = shift @_; |
| 1046 |
|
| 1047 |
my $result = $conn->exec($sql); |
| 1048 |
print STDERR "$sql\n" if ($debug); |
| 1049 |
RollbackAndQuit($conn) if ($result->resultStatus ne PGRES_COMMAND_OK); |
| 1050 |
} |
| 1051 |
|
| 1052 |
sub Exec2 { |
| 1053 |
my $mconn = shift @_; |
| 1054 |
my $sconn = shift @_; |
| 1055 |
my $sql = shift @_; |
| 1056 |
|
| 1057 |
my $result = $mconn->exec($sql); |
| 1058 |
RollbackAndQuit($mconn) if ($result->resultStatus ne PGRES_COMMAND_OK); |
| 1059 |
$result = $sconn->exec($sql); |
| 1060 |
RollbackAndQuit($sconn) if ($result->resultStatus ne PGRES_COMMAND_OK); |
| 1061 |
} |
| 1062 |
|
| 1063 |
sub MkInfo { |
| 1064 |
my $db = shift || die "need database name!"; |
| 1065 |
my $host = shift; |
| 1066 |
my $port = shift; |
| 1067 |
my $user = shift; |
| 1068 |
my $password = shift; |
| 1069 |
|
| 1070 |
my $info = "dbname=$db"; |
| 1071 |
$info = "$info host=$host" if (defined($host)); |
| 1072 |
$info = "$info port=$port" if (defined($port)); |
| 1073 |
$info = "$info user=$user" if (defined($user)); |
| 1074 |
$info = "$info password=$password" if (defined($password)); |
| 1075 |
|
| 1076 |
return $info; |
| 1077 |
} |
| 1078 |
|
| 1079 |
1; |
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