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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_PRIMARY );
50  $this->beginTransaction( $dbw, __METHOD__ );
51 
52  # Find all the orphaned revisions
53  $this->output( "Checking for orphaned revisions..." );
54  $res = $dbw->newSelectQueryBuilder()
55  ->select( 'rev_id' )
56  ->from( 'revision' )
57  ->leftJoin( 'page', null, 'rev_page = page_id' )
58  ->where( [ 'page_namespace' => null ] )
59  ->caller( 'deleteOrphanedRevisions' )
60  ->fetchResultSet();
61 
62  # Stash 'em all up for deletion (if needed)
63  $revisions = [];
64  foreach ( $res as $row ) {
65  $revisions[] = $row->rev_id;
66  }
67  $count = count( $revisions );
68  $this->output( "found {$count}.\n" );
69 
70  # Nothing to do?
71  if ( $report || $count == 0 ) {
72  $this->commitTransaction( $dbw, __METHOD__ );
73  return;
74  }
75 
76  # Delete each revision
77  $this->output( "Deleting..." );
78  $this->deleteRevs( $revisions, $dbw );
79  $this->output( "done.\n" );
80 
81  # Close the transaction and call the script to purge unused text records
82  $this->commitTransaction( $dbw, __METHOD__ );
83  $this->purgeRedundantText( true );
84  }
85 
93  private function deleteRevs( array $id, $dbw ) {
94  $dbw->delete( 'revision', [ 'rev_id' => $id ], __METHOD__ );
95 
96  // Delete from ip_changes should a record exist.
97  $dbw->delete( 'ip_changes', [ 'ipc_rev_id' => $id ], __METHOD__ );
98  }
99 }
100 
101 $maintClass = DeleteOrphanedRevisions::class;
102 require_once RUN_MAINTENANCE_IF_MAIN;
Maintenance script that deletes revisions which refer to a nonexisting page.
__construct()
Default constructor.
Abstract maintenance class for quickly writing and churning out maintenance scripts with minimal effo...
Definition: Maintenance.php:66
getDB( $db, $groups=[], $dbDomain=false)
Returns a database to be used by current maintenance script.
beginTransaction(IDatabase $dbw, $fname)
Begin a transaction on a DB.
commitTransaction(IDatabase $dbw, $fname)
Commit the transaction on a DB handle and wait for replica DBs to catch up.
output( $out, $channel=null)
Throw some output to the user.
hasOption( $name)
Checks to see if a particular option was set.
purgeRedundantText( $delete=true)
Support function for cleaning up redundant text records.
addDescription( $text)
Set the description text.
addOption( $name, $description, $required=false, $withArg=false, $shortName=false, $multiOccurrence=false)
Add a parameter to the script.
Basic database interface for live and lazy-loaded relation database handles.
Definition: IDatabase.php:40
const DB_PRIMARY
Definition: defines.php:28