maintenance/storage/resolveStubs.php

   1 <?php
   2
   3 define( 'REPORTING_INTERVAL', 100 );
   4
   5 if ( !defined( 'MEDIAWIKI' ) ) {
   6         $optionsWithArgs = array( 'm' );
   7
   8         require_once( '../commandLine.inc' );
   9         require_once( 'includes/ExternalStoreDB.php' );
  10
  11         resolveStubs();
  12 }
  13
  14 /**
  15  * Convert history stubs that point to an external row to direct
  16  * external pointers
  17  */
  18 function resolveStubs() {
  19         $fname = 'resolveStubs';
  20
  21         $dbr =& wfGetDB( DB_SLAVE );
  22         $dbw =& wfGetDB( DB_MASTER );
  23         $maxID = $dbr->selectField( 'text', 'MAX(old_id)', false, $fname );
  24         $blockSize = 10000;
  25         $numBlocks = intval( $maxID / $blockSize ) + 1;
  26
  27         for ( $b = 0; $b < $numBlocks; $b++ ) {
  28                 wfWaitForSlaves( 5 );
  29
  30                 printf( "%5.2f%%\n", $b / $numBlocks * 100 );
  31                 $start = intval($maxID / $numBlocks) * $b + 1;
  32                 $end = intval($maxID / $numBlocks) * ($b + 1);
  33                 $stubs = array();
  34                 $flagsArray = array();
  35
  36
  37                 $res = $dbr->select( 'text', array( 'old_id', 'old_text', 'old_flags' ),
  38                         "old_id>=$start AND old_id<=$end " .
  39                         # Using a more restrictive flag set for now, until I do some more analysis -- TS
  40                         #"AND old_flags LIKE '%object%' AND old_flags NOT LIKE '%external%' ".
  41
  42                         "AND old_flags='object' " .
  43                         "AND old_text LIKE 'O:15:\"historyblobstub\"%'", $fname );
  44                 while ( $row = $dbr->fetchObject( $res ) ) {
  45                         resolveStub( $row->old_id, $row->old_text, $row->old_flags );
  46                 }
  47                 $dbr->freeResult( $res );
  48
  49
  50         }
  51         print "100%\n";
  52 }
  53
  54 /**
  55  * Resolve a history stub
  56  */
  57 function resolveStub( $id, $stubText, $flags ) {
  58         $fname = 'resolveStub';
  59
  60         $stub = unserialize( $stubText );
  61         $flags = explode( ',', $flags );
  62
  63         $dbr =& wfGetDB( DB_SLAVE );
  64         $dbw =& wfGetDB( DB_MASTER );
  65
  66         if ( strtolower( get_class( $stub ) ) !== 'historyblobstub' ) {
  67                 print "Error found object of class " . get_class( $stub ) . ", expecting historyblobstub\n";
  68                 return;
  69         }
  70
  71         # Get the (maybe) external row
  72         $externalRow = $dbr->selectRow( 'text', array( 'old_text' ),
  73                 array( 'old_id' => $stub->mOldId, "old_flags LIKE '%external%'" ),
  74                 $fname
  75         );
  76
  77         if ( !$externalRow ) {
  78                 # Object wasn't external
  79                 return;
  80         }
  81
  82         # Preserve the legacy encoding flag, but switch from object to external
  83         if ( in_array( 'utf-8', $flags ) ) {
  84                 $newFlags = 'external,utf-8';
  85         } else {
  86                 $newFlags = 'external';
  87         }
  88
  89         # Update the row
  90         $dbw->update( 'text',
  91                 array( /* SET */
  92                         'old_flags' => $newFlags,
  93                         'old_text' => $externalRow->old_text . '/' . $stub->mHash
  94                 ),
  95                 array( /* WHERE */
  96                         'old_id' => $id
  97                 ), $fname
  98         );
  99 }
 100 ?>