From 222b01f5169f1c7e69762e0e8904c24f78f71882 Mon Sep 17 00:00:00 2001 From: Pierre Schmitz Date: Wed, 28 Jul 2010 11:52:48 +0200 Subject: update to MediaWiki 1.16.0 --- maintenance/convertLinks.php | 239 ++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 234 insertions(+), 5 deletions(-) (limited to 'maintenance/convertLinks.php') diff --git a/maintenance/convertLinks.php b/maintenance/convertLinks.php index e86d1e7c..415662a0 100644 --- a/maintenance/convertLinks.php +++ b/maintenance/convertLinks.php @@ -3,12 +3,241 @@ * Convert from the old links schema (string->ID) to the new schema (ID->ID) * The wiki should be put into read-only mode while this script executes * - * @file + * 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 + * * @ingroup Maintenance */ -/** */ -require_once( "commandLine.inc" ); -require_once( "convertLinks.inc" ); +require_once( dirname(__FILE__) . '/Maintenance.php' ); + +class ConvertLinks extends Maintenance { + + public function __construct() { + parent::__construct(); + $this->mDescription = "Convert from the old links schema (string->ID) to the new schema (ID->ID) +The wiki should be put into read-only mode while this script executes"; + } + + public function execute() { + global $wgDBtype; + if( $wgDBtype == 'postgres' ) { + $this->output( "Links table already ok on Postgres.\n" ); + return; + } + + $this->output( "Converting links table to ID-ID...\n" ); + + global $wgLang, $wgDBserver, $wgDBadminuser, $wgDBadminpassword, $wgDBname; + global $noKeys, $logPerformance, $fh; + + $tuplesAdded = $numBadLinks = $curRowsRead = 0; #counters etc + $totalTuplesInserted = 0; # total tuples INSERTed into links_temp + + $reportCurReadProgress = true; #whether or not to give progress reports while reading IDs from cur table + $curReadReportInterval = 1000; #number of rows between progress reports + + $reportLinksConvProgress = true; #whether or not to give progress reports during conversion + $linksConvInsertInterval = 1000; #number of rows per INSERT + + $initialRowOffset = 0; + #$finalRowOffset = 0; # not used yet; highest row number from links table to process + + # Overwrite the old links table with the new one. If this is set to false, + # the new table will be left at links_temp. + $overwriteLinksTable = true; + + # Don't create keys, and so allow duplicates in the new links table. + # This gives a huge speed improvement for very large links tables which are MyISAM. (What about InnoDB?) + $noKeys = false; + + + $logPerformance = false; # output performance data to a file + $perfLogFilename = "convLinksPerf.txt"; + #-------------------------------------------------------------------- + + $dbw = wfGetDB( DB_MASTER ); + list ($cur, $links, $links_temp, $links_backup) = $dbw->tableNamesN( 'cur', 'links', 'links_temp', 'links_backup' ); + + $res = $dbw->query( "SELECT l_from FROM $links LIMIT 1" ); + if ( $dbw->fieldType( $res, 0 ) == "int" ) { + $this->output( "Schema already converted\n" ); + return; + } + + $res = $dbw->query( "SELECT COUNT(*) AS count FROM $links" ); + $row = $dbw->fetchObject($res); + $numRows = $row->count; + $dbw->freeResult( $res ); + + if ( $numRows == 0 ) { + $this->output( "Updating schema (no rows to convert)...\n" ); + $this->createTempTable(); + } else { + if ( $logPerformance ) { $fh = fopen ( $perfLogFilename, "w" ); } + $baseTime = $startTime = $this->getMicroTime(); + # Create a title -> cur_id map + $this->output( "Loading IDs from $cur table...\n" ); + $this->performanceLog ( "Reading $numRows rows from cur table...\n" ); + $this->performanceLog ( "rows read vs seconds elapsed:\n" ); + + $dbw->bufferResults( false ); + $res = $dbw->query( "SELECT cur_namespace,cur_title,cur_id FROM $cur" ); + $ids = array(); + + while ( $row = $dbw->fetchObject( $res ) ) { + $title = $row->cur_title; + if ( $row->cur_namespace ) { + $title = $wgLang->getNsText( $row->cur_namespace ) . ":$title"; + } + $ids[$title] = $row->cur_id; + $curRowsRead++; + if ($reportCurReadProgress) { + if (($curRowsRead % $curReadReportInterval) == 0) { + $this->performanceLog( $curRowsRead . " " . ($this->getMicroTime() - $baseTime) . "\n" ); + $this->output( "\t$curRowsRead rows of $cur table read.\n" ); + } + } + } + $dbw->freeResult( $res ); + $dbw->bufferResults( true ); + $this->output( "Finished loading IDs.\n\n" ); + $this->performanceLog( "Took " . ($this->getMicroTime() - $baseTime) . " seconds to load IDs.\n\n" ); + #-------------------------------------------------------------------- + + # Now, step through the links table (in chunks of $linksConvInsertInterval rows), + # convert, and write to the new table. + $this->createTempTable(); + $this->performanceLog( "Resetting timer.\n\n" ); + $baseTime = $this->getMicroTime(); + $this->output( "Processing $numRows rows from $links table...\n" ); + $this->performanceLog( "Processing $numRows rows from $links table...\n" ); + $this->performanceLog( "rows inserted vs seconds elapsed:\n" ); + + for ($rowOffset = $initialRowOffset; $rowOffset < $numRows; $rowOffset += $linksConvInsertInterval) { + $sqlRead = "SELECT * FROM $links "; + $sqlRead = $dbw->limitResult($sqlRead, $linksConvInsertInterval,$rowOffset); + $res = $dbw->query($sqlRead); + if ( $noKeys ) { + $sqlWrite = array("INSERT INTO $links_temp (l_from,l_to) VALUES "); + } else { + $sqlWrite = array("INSERT IGNORE INTO $links_temp (l_from,l_to) VALUES "); + } + + $tuplesAdded = 0; # no tuples added to INSERT yet + while ( $row = $dbw->fetchObject($res) ) { + $fromTitle = $row->l_from; + if ( array_key_exists( $fromTitle, $ids ) ) { # valid title + $from = $ids[$fromTitle]; + $to = $row->l_to; + if ( $tuplesAdded != 0 ) { + $sqlWrite[] = ","; + } + $sqlWrite[] = "($from,$to)"; + $tuplesAdded++; + } else { # invalid title + $numBadLinks++; + } + } + $dbw->freeResult($res); + #$this->output( "rowOffset: $rowOffset\ttuplesAdded: $tuplesAdded\tnumBadLinks: $numBadLinks\n" ); + if ( $tuplesAdded != 0 ) { + if ($reportLinksConvProgress) { + $this->output( "Inserting $tuplesAdded tuples into $links_temp..." ); + } + $dbw->query( implode("",$sqlWrite) ); + $totalTuplesInserted += $tuplesAdded; + if ($reportLinksConvProgress) + $this->output( " done. Total $totalTuplesInserted tuples inserted.\n" ); + $this->performanceLog( $totalTuplesInserted . " " . ($this->getMicroTime() - $baseTime) . "\n" ); + } + } + $this->output( "$totalTuplesInserted valid titles and $numBadLinks invalid titles were processed.\n\n" ); + $this->performanceLog( "$totalTuplesInserted valid titles and $numBadLinks invalid titles were processed.\n" ); + $this->performanceLog( "Total execution time: " . ($this->getMicroTime() - $startTime) . " seconds.\n" ); + if ( $logPerformance ) { fclose ( $fh ); } + } + #-------------------------------------------------------------------- + + if ( $overwriteLinksTable ) { + $dbConn = Database::newFromParams( $wgDBserver, $wgDBadminuser, $wgDBadminpassword, $wgDBname ); + if (!($dbConn->isOpen())) { + $this->output( "Opening connection to database failed.\n" ); + return; + } + # Check for existing links_backup, and delete it if it exists. + $this->output( "Dropping backup links table if it exists..." ); + $dbConn->query( "DROP TABLE IF EXISTS $links_backup", DB_MASTER); + $this->output( " done.\n" ); + + # Swap in the new table, and move old links table to links_backup + $this->output( "Swapping tables '$links' to '$links_backup'; '$links_temp' to '$links'..." ); + $dbConn->query( "RENAME TABLE links TO $links_backup, $links_temp TO $links", DB_MASTER ); + $this->output( " done.\n\n" ); + + $dbConn->close(); + $this->output( "Conversion complete. The old table remains at $links_backup;\n" ); + $this->output( "delete at your leisure.\n" ); + } else { + $this->output( "Conversion complete. The converted table is at $links_temp;\n" ); + $this->output( "the original links table is unchanged.\n" ); + } + } + + private function createTempTable() { + global $wgDBserver, $wgDBadminuser, $wgDBadminpassword, $wgDBname; + global $noKeys; + $dbConn = Database::newFromParams( $wgDBserver, $wgDBadminuser, $wgDBadminpassword, $wgDBname ); + + if (!($dbConn->isOpen())) { + $this->output( "Opening connection to database failed.\n" ); + return; + } + $links_temp = $dbConn->tableName( 'links_temp' ); + + $this->output( "Dropping temporary links table if it exists..." ); + $dbConn->query( "DROP TABLE IF EXISTS $links_temp"); + $this->output( " done.\n" ); + + $this->output( "Creating temporary links table..." ); + if ( $noKeys ) { + $dbConn->query( "CREATE TABLE $links_temp ( " . + "l_from int(8) unsigned NOT NULL default '0', " . + "l_to int(8) unsigned NOT NULL default '0')"); + } else { + $dbConn->query( "CREATE TABLE $links_temp ( " . + "l_from int(8) unsigned NOT NULL default '0', " . + "l_to int(8) unsigned NOT NULL default '0', " . + "UNIQUE KEY l_from(l_from,l_to), " . + "KEY (l_to))"); + } + $this->output( " done.\n\n" ); + } + + private function performanceLog( $text ) { + global $logPerformance, $fh; + if ( $logPerformance ) { + fwrite( $fh, $text ); + } + } + + private function getMicroTime() { # return time in seconds, with microsecond accuracy + list($usec, $sec) = explode(" ", microtime()); + return ((float)$usec + (float)$sec); + } +} -convertLinks(); +$maintClass = "ConvertLinks"; +require_once( DO_MAINTENANCE ); -- cgit v1.2.3-54-g00ecf