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deleteOldRevisions.php
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1 <?php
25 require_once __DIR__ . '/Maintenance.php';
26 
33  public function __construct() {
34  parent::__construct();
35  $this->addDescription( 'Delete old (non-current) revisions from the database' );
36  $this->addOption( 'delete', 'Actually perform the deletion' );
37  $this->addOption( 'page_id', 'List of page ids to work on', false );
38  }
39 
40  public function execute() {
41  $this->output( "Delete old revisions\n\n" );
42  $this->doDelete( $this->hasOption( 'delete' ), $this->mArgs );
43  }
44 
45  function doDelete( $delete = false, $args = [] ) {
46  # Data should come off the master, wrapped in a transaction
47  $dbw = $this->getDB( DB_MASTER );
48  $this->beginTransaction( $dbw, __METHOD__ );
49 
50  $pageConds = [];
51  $revConds = [];
52 
53  # If a list of page_ids was provided, limit results to that set of page_ids
54  if ( count( $args ) > 0 ) {
55  $pageConds['page_id'] = $args;
56  $revConds['rev_page'] = $args;
57  $this->output( "Limiting to page IDs " . implode( ',', $args ) . "\n" );
58  }
59 
60  # Get "active" revisions from the page table
61  $this->output( "Searching for active revisions..." );
62  $res = $dbw->select( 'page', 'page_latest', $pageConds, __METHOD__ );
63  $latestRevs = [];
64  foreach ( $res as $row ) {
65  $latestRevs[] = $row->page_latest;
66  }
67  $this->output( "done.\n" );
68 
69  # Get all revisions that aren't in this set
70  $this->output( "Searching for inactive revisions..." );
71  if ( count( $latestRevs ) > 0 ) {
72  $revConds[] = 'rev_id NOT IN (' . $dbw->makeList( $latestRevs ) . ')';
73  }
74  $res = $dbw->select( 'revision', 'rev_id', $revConds, __METHOD__ );
75  $oldRevs = [];
76  foreach ( $res as $row ) {
77  $oldRevs[] = $row->rev_id;
78  }
79  $this->output( "done.\n" );
80 
81  # Inform the user of what we're going to do
82  $count = count( $oldRevs );
83  $this->output( "$count old revisions found.\n" );
84 
85  # Delete as appropriate
86  if ( $delete && $count ) {
87  $this->output( "Deleting..." );
88  $dbw->delete( 'revision', [ 'rev_id' => $oldRevs ], __METHOD__ );
89  $dbw->delete( 'ip_changes', [ 'ipc_rev_id' => $oldRevs ], __METHOD__ );
90  $this->output( "done.\n" );
91  }
92 
93  # Purge redundant text records
94  $this->commitTransaction( $dbw, __METHOD__ );
95  if ( $delete ) {
96  $this->purgeRedundantText( true );
97  }
98  }
99 }
100 
101 $maintClass = DeleteOldRevisions::class;
102 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
Abstract maintenance class for quickly writing and churning out maintenance scripts with minimal effo...
Definition: Maintenance.php:82
Maintenance script that deletes old (non-current) revisions from the database.
hasOption( $name)
Checks to see if a particular option exists.
const DB_MASTER
Definition: defines.php:26
if( $line===false) $args
Definition: cdb.php:64
addDescription( $text)
Set the description text.
output( $out, $channel=null)
Throw some output to the user.
doDelete( $delete=false, $args=[])
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.