+++ /dev/null
-<?php
-/**
- * @file
- * @todo document
- * @ingroup Maintenance
- */
-
-/** */
-function convertLinks() {
- global $wgDBtype;
- if( $wgDBtype == 'postgres' ) {
- wfOut( "Links table already ok on Postgres.\n" );
- return;
- }
-
- wfOut( "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' );
-
- // Get database-agnostic limit clause
- $sql_limit = $dbw->limitResult( "SELECT l_from FROM $links", 1 );
- $res = $dbw->query( $sql_limit );
- if ( $dbw->fieldType( $res, 0 ) == "int" ) {
- wfOut( "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 ) {
- wfOut( "Updating schema (no rows to convert)...\n" );
- createTempTable();
- } else {
- if ( $logPerformance ) { $fh = fopen ( $perfLogFilename, "w" ); }
- $baseTime = $startTime = getMicroTime();
- # Create a title -> cur_id map
- wfOut( "Loading IDs from $cur table...\n" );
- performanceLog ( "Reading $numRows rows from cur table...\n" );
- 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) {
- performanceLog( $curRowsRead . " " . (getMicroTime() - $baseTime) . "\n" );
- wfOut( "\t$curRowsRead rows of $cur table read.\n" );
- }
- }
- }
- $dbw->freeResult( $res );
- $dbw->bufferResults( true );
- wfOut( "Finished loading IDs.\n\n" );
- performanceLog( "Took " . (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.
- createTempTable();
- performanceLog( "Resetting timer.\n\n" );
- $baseTime = getMicroTime();
- wfOut( "Processing $numRows rows from $links table...\n" );
- performanceLog( "Processing $numRows rows from $links table...\n" );
- performanceLog( "rows inserted vs seconds elapsed:\n" );
-
- for ($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);
- #wfOut( "rowOffset: $rowOffset\ttuplesAdded: $tuplesAdded\tnumBadLinks: $numBadLinks\n" );
- if ( $tuplesAdded != 0 ) {
- if ($reportLinksConvProgress) {
- wfOut( "Inserting $tuplesAdded tuples into $links_temp..." );
- }
- $dbw->query( implode("",$sqlWrite) );
- $totalTuplesInserted += $tuplesAdded;
- if ($reportLinksConvProgress)
- wfOut( " done. Total $totalTuplesInserted tuples inserted.\n" );
- performanceLog( $totalTuplesInserted . " " . (getMicroTime() - $baseTime) . "\n" );
- }
- }
- wfOut( "$totalTuplesInserted valid titles and $numBadLinks invalid titles were processed.\n\n" );
- performanceLog( "$totalTuplesInserted valid titles and $numBadLinks invalid titles were processed.\n" );
- performanceLog( "Total execution time: " . (getMicroTime() - $startTime) . " seconds.\n" );
- if ( $logPerformance ) { fclose ( $fh ); }
- }
- #--------------------------------------------------------------------
-
- if ( $overwriteLinksTable ) {
- $dbConn = Database::newFromParams( $wgDBserver, $wgDBadminuser, $wgDBadminpassword, $wgDBname );
- if (!($dbConn->isOpen())) {
- wfOut( "Opening connection to database failed.\n" );
- return;
- }
- # Check for existing links_backup, and delete it if it exists.
- wfOut( "Dropping backup links table if it exists..." );
- $dbConn->query( "DROP TABLE IF EXISTS $links_backup", DB_MASTER);
- wfOut( " done.\n" );
-
- # Swap in the new table, and move old links table to links_backup
- wfOut( "Swapping tables '$links' to '$links_backup'; '$links_temp' to '$links'..." );
- $dbConn->query( "RENAME TABLE links TO $links_backup, $links_temp TO $links", DB_MASTER );
- wfOut( " done.\n\n" );
-
- $dbConn->close();
- wfOut( "Conversion complete. The old table remains at $links_backup;\n" );
- wfOut( "delete at your leisure.\n" );
- } else {
- wfOut( "Conversion complete. The converted table is at $links_temp;\n" );
- wfOut( "the original links table is unchanged.\n" );
- }
-}
-
-#--------------------------------------------------------------------
-
-function createTempTable() {
- global $wgDBserver, $wgDBadminuser, $wgDBadminpassword, $wgDBname;
- global $noKeys;
- $dbConn = Database::newFromParams( $wgDBserver, $wgDBadminuser, $wgDBadminpassword, $wgDBname );
-
- if (!($dbConn->isOpen())) {
- wfOut( "Opening connection to database failed.\n" );
- return;
- }
- $links_temp = $dbConn->tableName( 'links_temp' );
-
- wfOut( "Dropping temporary links table if it exists..." );
- $dbConn->query( "DROP TABLE IF EXISTS $links_temp");
- wfOut( " done.\n" );
-
- wfOut( "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))");
- }
- wfOut( " done.\n\n" );
-}
-
-function performanceLog( $text ) {
- global $logPerformance, $fh;
- if ( $logPerformance ) {
- fwrite( $fh, $text );
- }
-}
-
-function getMicroTime() { # return time in seconds, with microsecond accuracy
- list($usec, $sec) = explode(" ", microtime());
- return ((float)$usec + (float)$sec);
-}
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