MediaWiki  master
cleanupTable.inc
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1 <?php
24 require_once __DIR__ . '/Maintenance.php';
25 
31 class TableCleanup extends Maintenance {
32  protected $defaultParams = [
33  'table' => 'page',
34  'conds' => [],
35  'index' => 'page_id',
36  'callback' => 'processRow',
37  ];
38 
39  protected $dryrun = false;
40  public $batchSize = 100;
41  public $reportInterval = 100;
42 
44 
45  public function __construct() {
46  parent::__construct();
47  $this->addOption( 'dry-run', 'Perform a dry run' );
48  }
49 
50  public function execute() {
51  global $wgUser;
52  $this->dryrun = $this->hasOption( 'dry-run' );
53  if ( $this->dryrun ) {
54  $wgUser = User::newFromName( 'Conversion script' );
55  $this->output( "Checking for bad titles...\n" );
56  } else {
57  $wgUser = User::newSystemUser( 'Conversion script', [ 'steal' => true ] );
58  $this->output( "Checking and fixing bad titles...\n" );
59  }
60  $this->runTable( $this->defaultParams );
61  }
62 
63  protected function init( $count, $table ) {
64  $this->processed = 0;
65  $this->updated = 0;
66  $this->count = $count;
67  $this->startTime = microtime( true );
68  $this->table = $table;
69  }
70 
74  protected function progress( $updated ) {
75  $this->updated += $updated;
76  $this->processed++;
77  if ( $this->processed % $this->reportInterval != 0 ) {
78  return;
79  }
80  $portion = $this->processed / $this->count;
81  $updateRate = $this->updated / $this->processed;
82 
83  $now = microtime( true );
84  $delta = $now - $this->startTime;
85  $estimatedTotalTime = $delta / $portion;
86  $eta = $this->startTime + $estimatedTotalTime;
87 
88  $this->output(
89  sprintf( "%s %s: %6.2f%% done on %s; ETA %s [%d/%d] %.2f/sec <%.2f%% updated>\n",
90  wfWikiID(),
91  wfTimestamp( TS_DB, intval( $now ) ),
92  $portion * 100.0,
93  $this->table,
94  wfTimestamp( TS_DB, intval( $eta ) ),
95  $this->processed,
96  $this->count,
97  $this->processed / $delta,
98  $updateRate * 100.0
99  )
100  );
101  flush();
102  }
103 
108  public function runTable( $params ) {
109  $dbr = $this->getDB( DB_REPLICA );
110 
111  if ( array_diff( array_keys( $params ),
112  [ 'table', 'conds', 'index', 'callback' ] )
113  ) {
114  throw new MWException( __METHOD__ . ': Missing parameter ' . implode( ', ', $params ) );
115  }
116 
117  $table = $params['table'];
118  // count(*) would melt the DB for huge tables, we can estimate here
119  $count = $dbr->estimateRowCount( $table, '*', '', __METHOD__ );
120  $this->init( $count, $table );
121  $this->output( "Processing $table...\n" );
122 
123  $index = (array)$params['index'];
124  $indexConds = [];
125  $options = [
126  'ORDER BY' => implode( ',', $index ),
127  'LIMIT' => $this->batchSize
128  ];
129  $callback = [ $this, $params['callback'] ];
130 
131  while ( true ) {
132  $conds = array_merge( $params['conds'], $indexConds );
133  $res = $dbr->select( $table, '*', $conds, __METHOD__, $options );
134  if ( !$res->numRows() ) {
135  // Done
136  break;
137  }
138 
139  foreach ( $res as $row ) {
140  call_user_func( $callback, $row );
141  }
142 
143  if ( $res->numRows() < $this->batchSize ) {
144  // Done
145  break;
146  }
147 
148  // Update the conditions to select the next batch.
149  // Construct a condition string by starting with the least significant part
150  // of the index, and adding more significant parts progressively to the left
151  // of the string.
152  $nextCond = '';
153  foreach ( array_reverse( $index ) as $field ) {
154  $encValue = $dbr->addQuotes( $row->$field );
155  if ( $nextCond === '' ) {
156  $nextCond = "$field > $encValue";
157  } else {
158  $nextCond = "$field > $encValue OR ($field = $encValue AND ($nextCond))";
159  }
160  }
161  $indexConds = [ $nextCond ];
162  }
163 
164  $this->output( "Finished $table... $this->updated of $this->processed rows updated\n" );
165  }
166 
171  protected function hexChar( $matches ) {
172  return sprintf( "\\x%02x", ord( $matches[1] ) );
173  }
174 }
Abstract maintenance class for quickly writing and churning out maintenance scripts with minimal effo...
Definition: maintenance.txt:39
init( $count, $table)
runTable( $params)
hasOption( $name)
Checks to see if a particular option exists.
wfTimestamp( $outputtype=TS_UNIX, $ts=0)
Get a timestamp string in one of various formats.
hexChar( $matches)
Generic class to cleanup a database table.
$res
Definition: database.txt:21
$params
null means default in associative array with keys and values unescaped Should be merged with default with a value of false meaning to suppress the attribute in associative array with keys and values unescaped & $options
Definition: hooks.txt:1982
getDB( $db, $groups=[], $wiki=false)
Returns a database to be used by current maintenance script.
wfWikiID()
Get an ASCII string identifying this wiki This is used as a prefix in memcached keys.
output( $out, $channel=null)
Throw some output to the user.
This document is intended to provide useful advice for parties seeking to redistribute MediaWiki to end users It s targeted particularly at maintainers for Linux since it s been observed that distribution packages of MediaWiki often break We ve consistently had to recommend that users seeking support use official tarballs instead of their distribution s and this often solves whatever problem the user is having It would be nice if this could such as
Definition: distributors.txt:9
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition: injection.txt:35
progress( $updated)
deferred txt A few of the database updates required by various functions here can be deferred until after the result page is displayed to the user For updating the view updating the linked to tables after a etc PHP does not yet have any way to tell the server to actually return and disconnect while still running these but it might have such a feature in the future We handle these by creating a deferred update object and putting those objects on a global then executing the whole list after the page is displayed We don t do anything smart like collating updates to the same table or such because the list is almost always going to have just one item on if so it s not worth the trouble Since there is a job queue in the jobs table
Definition: deferred.txt:11
addOption( $name, $description, $required=false, $withArg=false, $shortName=false, $multiOccurrence=false)
Add a parameter to the script.
const DB_REPLICA
Definition: defines.php:25
static newFromName( $name, $validate='valid')
Static factory method for creation from username.
Definition: User.php:594
static newSystemUser( $name, $options=[])
Static factory method for creation of a "system" user from username.
Definition: User.php:831
$matches