MediaWiki  REL1_31
renameDbPrefix.php
Go to the documentation of this file.
1 <?php
26 require_once __DIR__ . '/Maintenance.php';
27 
33 class RenameDbPrefix extends Maintenance {
34  public function __construct() {
35  parent::__construct();
36  $this->addOption( "old", "Old db prefix [0 for none]", true, true );
37  $this->addOption( "new", "New db prefix [0 for none]", true, true );
38  }
39 
40  public function getDbType() {
41  return Maintenance::DB_ADMIN;
42  }
43 
44  public function execute() {
46 
47  // Allow for no old prefix
48  if ( $this->getOption( 'old', 0 ) === '0' ) {
49  $old = '';
50  } else {
51  // Use nice safe, sane, prefixes
52  preg_match( '/^[a-zA-Z]+_$/', $this->getOption( 'old' ), $m );
53  $old = isset( $m[0] ) ? $m[0] : false;
54  }
55  // Allow for no new prefix
56  if ( $this->getOption( 'new', 0 ) === '0' ) {
57  $new = '';
58  } else {
59  // Use nice safe, sane, prefixes
60  preg_match( '/^[a-zA-Z]+_$/', $this->getOption( 'new' ), $m );
61  $new = isset( $m[0] ) ? $m[0] : false;
62  }
63 
64  if ( $old === false || $new === false ) {
65  $this->fatalError( "Invalid prefix!" );
66  }
67  if ( $old === $new ) {
68  $this->output( "Same prefix. Nothing to rename!\n", true );
69  }
70 
71  $this->output( "Renaming DB prefix for tables of $wgDBname from '$old' to '$new'\n" );
72  $count = 0;
73 
74  $dbw = $this->getDB( DB_MASTER );
75  $res = $dbw->query( "SHOW TABLES " . $dbw->buildLike( $old, $dbw->anyString() ) );
76  foreach ( $res as $row ) {
77  // XXX: odd syntax. MySQL outputs an oddly cased "Tables of X"
78  // sort of message. Best not to try $row->x stuff...
79  $fields = get_object_vars( $row );
80  // Silly for loop over one field...
81  foreach ( $fields as $table ) {
82  // $old should be regexp safe ([a-zA-Z_])
83  $newTable = preg_replace( '/^' . $old . '/', $new, $table );
84  $this->output( "Renaming table $table to $newTable\n" );
85  $dbw->query( "RENAME TABLE $table TO $newTable" );
86  }
87  $count++;
88  }
89  $this->output( "Done! [$count tables]\n" );
90  }
91 }
92 
94 require_once RUN_MAINTENANCE_IF_MAIN;
RenameDbPrefix\execute
execute()
Do the actual work.
Definition: renameDbPrefix.php:44
$maintClass
$maintClass
Definition: renameDbPrefix.php:93
Maintenance\fatalError
fatalError( $msg, $exitCode=1)
Output a message and terminate the current script.
Definition: Maintenance.php:439
RenameDbPrefix\__construct
__construct()
Default constructor.
Definition: renameDbPrefix.php:34
RUN_MAINTENANCE_IF_MAIN
require_once RUN_MAINTENANCE_IF_MAIN
Definition: maintenance.txt:50
$res
$res
Definition: database.txt:21
Maintenance
Abstract maintenance class for quickly writing and churning out maintenance scripts with minimal effo...
Definition: maintenance.txt:39
php
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:37
$wgDBname
controlled by $wgMainCacheType controlled by $wgParserCacheType controlled by $wgMessageCacheType If you set CACHE_NONE to one of the three control default value for MediaWiki still create a but requests to it are no ops and we always fall through to the database If the cache daemon can t be it should also disable itself fairly smoothly By $wgMemc is used but when it is $parserMemc or $messageMemc this is mentioned $wgDBname
Definition: memcached.txt:138
Maintenance\addOption
addOption( $name, $description, $required=false, $withArg=false, $shortName=false, $multiOccurrence=false)
Add a parameter to the script.
Definition: Maintenance.php:219
RenameDbPrefix\getDbType
getDbType()
Does the script need different DB access? By default, we give Maintenance scripts normal rights to th...
Definition: renameDbPrefix.php:40
global
when a variable name is used in a it is silently declared as a new masking the global
Definition: design.txt:95
DB_MASTER
const DB_MASTER
Definition: defines.php:26
Maintenance\DB_ADMIN
const DB_ADMIN
Definition: Maintenance.php:68
RenameDbPrefix
Maintenance script that changes the prefix of database tables.
Definition: renameDbPrefix.php:33
Maintenance\getOption
getOption( $name, $default=null)
Get an option, or return the default.
Definition: Maintenance.php:254
as
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:22
Maintenance\getDB
getDB( $db, $groups=[], $wiki=false)
Returns a database to be used by current maintenance script.
Definition: Maintenance.php:1309
Maintenance\output
output( $out, $channel=null)
Throw some output to the user.
Definition: Maintenance.php:388
class
you have access to all of the normal MediaWiki so you can get a DB use the etc For full docs on the Maintenance class
Definition: maintenance.txt:56