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<?php
/**
* Replication-safe online upgrade for log_id/log_deleted fields.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup MaintenanceArchive
*/
require( __DIR__ . '/../commandLine.inc' );
/**
* Maintenance script that upgrade for log_id/log_deleted fields in a
* replication-safe way.
*
* @ingroup Maintenance
*/
class UpdateLogging {
/**
* @var DatabaseBase
*/
var $dbw;
var $batchSize = 1000;
var $minTs = false;
function execute() {
$this->dbw = wfGetDB( DB_MASTER );
$logging = $this->dbw->tableName( 'logging' );
$logging_1_10 = $this->dbw->tableName( 'logging_1_10' );
$logging_pre_1_10 = $this->dbw->tableName( 'logging_pre_1_10' );
if ( $this->dbw->tableExists( 'logging_pre_1_10' ) && !$this->dbw->tableExists( 'logging' ) ) {
# Fix previous aborted run
echo "Cleaning up from previous aborted run\n";
$this->dbw->query( "RENAME TABLE $logging_pre_1_10 TO $logging", __METHOD__ );
}
if ( $this->dbw->tableExists( 'logging_pre_1_10' ) ) {
echo "This script has already been run to completion\n";
return;
}
# Create the target table
if ( !$this->dbw->tableExists( 'logging_1_10' ) ) {
global $wgDBTableOptions;
$sql = <<<EOT
CREATE TABLE $logging_1_10 (
-- Log ID, for referring to this specific log entry, probably for deletion and such.
log_id int unsigned NOT NULL auto_increment,
-- Symbolic keys for the general log type and the action type
-- within the log. The output format will be controlled by the
-- action field, but only the type controls categorization.
log_type varbinary(10) NOT NULL default '',
log_action varbinary(10) NOT NULL default '',
-- Timestamp. Duh.
log_timestamp binary(14) NOT NULL default '19700101000000',
-- The user who performed this action; key to user_id
log_user int unsigned NOT NULL default 0,
-- Key to the page affected. Where a user is the target,
-- this will point to the user page.
log_namespace int NOT NULL default 0,
log_title varchar(255) binary NOT NULL default '',
-- Freeform text. Interpreted as edit history comments.
log_comment varchar(255) NOT NULL default '',
-- LF separated list of miscellaneous parameters
log_params blob NOT NULL,
-- rev_deleted for logs
log_deleted tinyint unsigned NOT NULL default '0',
PRIMARY KEY log_id (log_id),
KEY type_time (log_type, log_timestamp),
KEY user_time (log_user, log_timestamp),
KEY page_time (log_namespace, log_title, log_timestamp),
KEY times (log_timestamp)
) $wgDBTableOptions
EOT;
echo "Creating table logging_1_10\n";
$this->dbw->query( $sql, __METHOD__ );
}
# Synchronise the tables
echo "Doing initial sync...\n";
$this->sync( 'logging', 'logging_1_10' );
echo "Sync done\n\n";
# Rename the old table away
echo "Renaming the old table to $logging_pre_1_10\n";
$this->dbw->query( "RENAME TABLE $logging TO $logging_pre_1_10", __METHOD__ );
# Copy remaining old rows
# Done before the new table is active so that $copyPos is accurate
echo "Doing final sync...\n";
$this->sync( 'logging_pre_1_10', 'logging_1_10' );
# Move the new table in
echo "Moving the new table in...\n";
$this->dbw->query( "RENAME TABLE $logging_1_10 TO $logging", __METHOD__ );
echo "Finished.\n";
}
/**
* Copy all rows from $srcTable to $dstTable
*/
function sync( $srcTable, $dstTable ) {
$batchSize = 1000;
$minTs = $this->dbw->selectField( $srcTable, 'MIN(log_timestamp)', false, __METHOD__ );
$minTsUnix = wfTimestamp( TS_UNIX, $minTs );
$numRowsCopied = 0;
while ( true ) {
$maxTs = $this->dbw->selectField( $srcTable, 'MAX(log_timestamp)', false, __METHOD__ );
$copyPos = $this->dbw->selectField( $dstTable, 'MAX(log_timestamp)', false, __METHOD__ );
$maxTsUnix = wfTimestamp( TS_UNIX, $maxTs );
$copyPosUnix = wfTimestamp( TS_UNIX, $copyPos );
if ( $copyPos === null ) {
$percent = 0;
} else {
$percent = ( $copyPosUnix - $minTsUnix ) / ( $maxTsUnix - $minTsUnix ) * 100;
}
printf( "%s %.2f%%\n", $copyPos, $percent );
# Handle all entries with timestamp equal to $copyPos
if ( $copyPos !== null ) {
$numRowsCopied += $this->copyExactMatch( $srcTable, $dstTable, $copyPos );
}
# Now copy a batch of rows
if ( $copyPos === null ) {
$conds = false;
} else {
$conds = array( 'log_timestamp > ' . $this->dbw->addQuotes( $copyPos ) );
}
$srcRes = $this->dbw->select( $srcTable, '*', $conds, __METHOD__,
array( 'LIMIT' => $batchSize, 'ORDER BY' => 'log_timestamp' ) );
if ( ! $srcRes->numRows() ) {
# All done
break;
}
$batch = array();
foreach ( $srcRes as $srcRow ) {
$batch[] = (array)$srcRow;
}
$this->dbw->insert( $dstTable, $batch, __METHOD__ );
$numRowsCopied += count( $batch );
wfWaitForSlaves();
}
echo "Copied $numRowsCopied rows\n";
}
function copyExactMatch( $srcTable, $dstTable, $copyPos ) {
$numRowsCopied = 0;
$srcRes = $this->dbw->select( $srcTable, '*', array( 'log_timestamp' => $copyPos ), __METHOD__ );
$dstRes = $this->dbw->select( $dstTable, '*', array( 'log_timestamp' => $copyPos ), __METHOD__ );
if ( $srcRes->numRows() ) {
$srcRow = $srcRes->fetchObject();
$srcFields = array_keys( (array)$srcRow );
$srcRes->seek( 0 );
$dstRowsSeen = array();
# Make a hashtable of rows that already exist in the destination
foreach ( $dstRes as $dstRow ) {
$reducedDstRow = array();
foreach ( $srcFields as $field ) {
$reducedDstRow[$field] = $dstRow->$field;
}
$hash = md5( serialize( $reducedDstRow ) );
$dstRowsSeen[$hash] = true;
}
# Copy all the source rows that aren't already in the destination
foreach ( $srcRes as $srcRow ) {
$hash = md5( serialize( (array)$srcRow ) );
if ( !isset( $dstRowsSeen[$hash] ) ) {
$this->dbw->insert( $dstTable, (array)$srcRow, __METHOD__ );
$numRowsCopied++;
}
}
}
return $numRowsCopied;
}
}
$ul = new UpdateLogging;
$ul->execute();
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