<?php
-# 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
-
+/**
+ * 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
+ *
+ * @addtogroup Maintenance
+ */
+
+/** */
require_once( "commandLine.inc" );
-# the below should probably be moved into commandLine.inc at some point
-require_once( "../AdminSettings.php" );
-
-$numRows = $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";
-#--------------------------------------------------------------------
-
-$res = wfQuery( "SELECT COUNT(*) AS count FROM links", DB_WRITE );
-$row = wfFetchObject($res);
-$numRows = $row->count;
-wfFreeResult( $res );
-
-if ( $numRows == 0 ) {
- print "No rows to convert. Updating schema...\n";
- createTempTable();
-} else {
- $row = wfFetchObject( $res );
- if ( is_numeric( $row->l_from ) ) {
- print "Schema already converted\n";
- exit;
- }
-
- if ( $logPerformance ) { $fh = fopen ( $perfLogFilename, "w" ); }
- $baseTime = $startTime = getMicroTime();
- # Create a title -> cur_id map
- print "Loading IDs from cur table...\n";
- performanceLog ( "Reading $numRows rows from cur table...\n" );
- performanceLog ( "rows read vs seconds elapsed:\n" );
- wfBufferSQLResults( false );
- $res = wfQuery( "SELECT cur_namespace,cur_title,cur_id FROM cur", DB_WRITE );
- $ids = array();
-
- while ( $row = wfFetchObject( $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() - $baseTime) . "\n" );
- print "\t$curRowsRead rows of cur table read.\n";
- }
- }
- }
- wfFreeResult( $res );
- wfBufferSQLResults( true );
- print "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();
- print "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 LIMIT $linksConvInsertInterval OFFSET $rowOffset";
- $res = wfQuery($sqlRead, DB_READ);
- 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 ( $row = wfFetchObject($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
- $numBadLinks++;
- }
- }
- wfFreeResult($res);
- #print "rowOffset: $rowOffset\ttuplesAdded: $tuplesAdded\tnumBadLinks: $numBadLinks\n";
- if ( $tuplesAdded != 0 ) {
- if ($reportLinksConvProgress) {
- print "Inserting $tuplesAdded tuples into links_temp...";
- }
- wfQuery( implode("",$sqlWrite) , DB_WRITE );
- $totalTuplesInserted += $tuplesAdded;
- if ($reportLinksConvProgress)
- print " done. Total $totalTuplesInserted tuples inserted.\n";
- performanceLog( $totalTuplesInserted . " " . (getMicroTime() - $baseTime) . "\n" );
- }
- }
- print "$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())) {
- print "Opening connection to database failed.\n";
- exit;
- }
- # Check for existing links_backup, and delete it if it exists.
- print "Dropping backup links table if it exists...";
- $dbConn->query( "DROP TABLE IF EXISTS links_backup", DB_WRITE);
- print " done.\n";
-
- # Swap in the new table, and move old links table to links_backup
- print "Swapping tables 'links' to 'links_backup'; 'links_temp' to 'links'...";
- $dbConn->query( "RENAME TABLE links TO links_backup, links_temp TO links", DB_WRITE );
- print " done.\n\n";
-
- $dbConn->close();
- print "Conversion complete. The old table remains at links_backup;\n";
- print "delete at your leisure.\n";
-} else {
- print "Conversion complete. The converted table is at links_temp;\n";
- print "the original links table is unchanged.\n";
-}
-
-#--------------------------------------------------------------------
+require_once( "convertLinks.inc" );
-function createTempTable() {
- global $wgDBserver, $wgDBadminuser, $wgDBadminpassword, $wgDBname;
- global $noKeys;
- $dbConn = Database::newFromParams( $wgDBserver, $wgDBadminuser, $wgDBadminpassword, $wgDBname );
-
- if (!($dbConn->isOpen())) {
- print "Opening connection to database failed.\n";
- exit;
- }
-
- print "Dropping temporary links table if it exists...";
- $dbConn->query( "DROP TABLE IF EXISTS links_temp", DB_WRITE);
- print " done.\n";
-
- print "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')", DB_WRITE);
- } 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))", DB_WRITE);
- }
- print " done.\n\n";
-}
+convertLinks();
-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);
-}
-?>
dépôts / lhc / web / wiklou.git / blobdiff