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deleteOrphanedRevisions.php
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1 <?php
27 require_once __DIR__ . '/Maintenance.php';
28 
30 
37  public function __construct() {
38  parent::__construct();
39  $this->addDescription(
40  'Maintenance script to delete revisions which refer to a nonexisting page' );
41  $this->addOption( 'report', 'Prints out a count of affected revisions but doesn\'t delete them' );
42  }
43 
44  public function execute() {
45  $this->output( "Delete Orphaned Revisions\n" );
46 
47  $report = $this->hasOption( 'report' );
48 
49  $dbw = $this->getDB( DB_MASTER );
50  $this->beginTransaction( $dbw, __METHOD__ );
51  list( $page, $revision ) = $dbw->tableNamesN( 'page', 'revision' );
52 
53  # Find all the orphaned revisions
54  $this->output( "Checking for orphaned revisions..." );
55  $sql = "SELECT rev_id FROM {$revision} LEFT JOIN {$page} ON rev_page = page_id "
56  . "WHERE page_namespace IS NULL";
57  $res = $dbw->query( $sql, 'deleteOrphanedRevisions' );
58 
59  # Stash 'em all up for deletion (if needed)
60  $revisions = [];
61  foreach ( $res as $row ) {
62  $revisions[] = $row->rev_id;
63  }
64  $count = count( $revisions );
65  $this->output( "found {$count}.\n" );
66 
67  # Nothing to do?
68  if ( $report || $count == 0 ) {
69  $this->commitTransaction( $dbw, __METHOD__ );
70  exit( 0 );
71  }
72 
73  # Delete each revision
74  $this->output( "Deleting..." );
75  $this->deleteRevs( $revisions, $dbw );
76  $this->output( "done.\n" );
77 
78  # Close the transaction and call the script to purge unused text records
79  $this->commitTransaction( $dbw, __METHOD__ );
80  $this->purgeRedundantText( true );
81  }
82 
90  private function deleteRevs( array $id, &$dbw ) {
91  $dbw->delete( 'revision', [ 'rev_id' => $id ], __METHOD__ );
92 
93  // Delete from ip_changes should a record exist.
94  $dbw->delete( 'ip_changes', [ 'ipc_rev_id' => $id ], __METHOD__ );
95  }
96 }
97 
98 $maintClass = DeleteOrphanedRevisions::class;
99 require_once RUN_MAINTENANCE_IF_MAIN;
commitTransaction(IDatabase $dbw, $fname)
Commit the transcation on a DB handle and wait for replica DBs to catch up.
const RUN_MAINTENANCE_IF_MAIN
Definition: Maintenance.php:39
deleteRevs(array $id, &$dbw)
Delete one or more revisions from the database Do this inside a transaction.
Abstract maintenance class for quickly writing and churning out maintenance scripts with minimal effo...
Definition: Maintenance.php:82
hasOption( $name)
Checks to see if a particular option exists.
const DB_MASTER
Definition: defines.php:26
Maintenance script that deletes revisions which refer to a nonexisting page.
addDescription( $text)
Set the description text.
output( $out, $channel=null)
Throw some output to the user.
addOption( $name, $description, $required=false, $withArg=false, $shortName=false, $multiOccurrence=false)
Add a parameter to the script.
purgeRedundantText( $delete=true)
Support function for cleaning up redundant text records.
getDB( $db, $groups=[], $dbDomain=false)
Returns a database to be used by current maintenance script.
beginTransaction(IDatabase $dbw, $fname)
Begin a transcation on a DB.