MediaWiki  master
sql.php
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1 <?php
25 require_once __DIR__ . '/Maintenance.php';
26 
31 
37 class MwSql extends Maintenance {
38  public function __construct() {
39  parent::__construct();
40  $this->addDescription( 'Send SQL queries to a MediaWiki database. ' .
41  'Takes a file name containing SQL as argument or runs interactively.' );
42  $this->addOption( 'query',
43  'Run a single query instead of running interactively', false, true );
44  $this->addOption( 'json', 'Output the results as JSON instead of PHP objects' );
45  $this->addOption( 'status', 'Return successful exit status only if the query succeeded '
46  . '(selected or altered rows), otherwise 1 for errors, 2 for no rows' );
47  $this->addOption( 'cluster', 'Use an external cluster by name', false, true );
48  $this->addOption( 'wikidb',
49  'The database wiki ID to use if not the current one', false, true );
50  $this->addOption( 'replicadb',
51  'Replica DB server to use instead of the master DB (can be "any")', false, true );
52  }
53 
54  public function execute() {
55  global $IP;
56 
57  // We wan't to allow "" for the wikidb, meaning don't call select_db()
58  $wiki = $this->hasOption( 'wikidb' ) ? $this->getOption( 'wikidb' ) : false;
59  // Get the appropriate load balancer (for this wiki)
60  $lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
61  if ( $this->hasOption( 'cluster' ) ) {
62  $lb = $lbFactory->getExternalLB( $this->getOption( 'cluster' ) );
63  } else {
64  $lb = $lbFactory->getMainLB( $wiki );
65  }
66  // Figure out which server to use
67  $replicaDB = $this->getOption( 'replicadb', $this->getOption( 'slave', '' ) );
68  if ( $replicaDB === 'any' ) {
69  $index = DB_REPLICA;
70  } elseif ( $replicaDB != '' ) {
71  $index = null;
72  $serverCount = $lb->getServerCount();
73  for ( $i = 0; $i < $serverCount; ++$i ) {
74  if ( $lb->getServerName( $i ) === $replicaDB ) {
75  $index = $i;
76  break;
77  }
78  }
79  if ( $index === null ) {
80  $this->fatalError( "No replica DB server configured with the name '$replicaDB'." );
81  }
82  } else {
83  $index = DB_MASTER;
84  }
85 
87  $db = $lb->getConnection( $index, [], $wiki );
88  if ( $replicaDB != '' && $db->getLBInfo( 'master' ) !== null ) {
89  $this->fatalError( "The server selected ({$db->getServer()}) is not a replica DB." );
90  }
91 
92  if ( $index === DB_MASTER ) {
93  $updater = DatabaseUpdater::newForDB( $db, true, $this );
94  $db->setSchemaVars( $updater->getSchemaVars() );
95  }
96 
97  if ( $this->hasArg( 0 ) ) {
98  $file = fopen( $this->getArg( 0 ), 'r' );
99  if ( !$file ) {
100  $this->fatalError( "Unable to open input file" );
101  }
102 
103  $error = $db->sourceStream( $file, null, [ $this, 'sqlPrintResult' ] );
104  if ( $error !== true ) {
105  $this->fatalError( $error );
106  } else {
107  exit( 0 );
108  }
109  }
110 
111  if ( $this->hasOption( 'query' ) ) {
112  $query = $this->getOption( 'query' );
113  $res = $this->sqlDoQuery( $db, $query, /* dieOnError */ true );
114  wfWaitForSlaves();
115  if ( $this->hasOption( 'status' ) ) {
116  exit( $res ? 0 : 2 );
117  }
118  return;
119  }
120 
121  if (
122  function_exists( 'readline_add_history' ) &&
123  Maintenance::posix_isatty( 0 /*STDIN*/ )
124  ) {
125  $historyFile = isset( $_ENV['HOME'] ) ?
126  "{$_ENV['HOME']}/.mwsql_history" : "$IP/maintenance/.mwsql_history";
127  readline_read_history( $historyFile );
128  } else {
129  $historyFile = null;
130  }
131 
132  $wholeLine = '';
133  $newPrompt = '> ';
134  $prompt = $newPrompt;
135  $doDie = !Maintenance::posix_isatty( 0 );
136  $res = 1;
137  while ( ( $line = Maintenance::readconsole( $prompt ) ) !== false ) {
138  if ( !$line ) {
139  # User simply pressed return key
140  continue;
141  }
142  $done = $db->streamStatementEnd( $wholeLine, $line );
143 
144  $wholeLine .= $line;
145 
146  if ( !$done ) {
147  $wholeLine .= ' ';
148  $prompt = ' -> ';
149  continue;
150  }
151  if ( $historyFile ) {
152  # Delimiter is eated by streamStatementEnd, we add it
153  # up in the history (T39020)
154  readline_add_history( $wholeLine . ';' );
155  readline_write_history( $historyFile );
156  }
157  $res = $this->sqlDoQuery( $db, $wholeLine, $doDie );
158  $prompt = $newPrompt;
159  $wholeLine = '';
160  }
161  wfWaitForSlaves();
162  if ( $this->hasOption( 'status' ) ) {
163  exit( $res ? 0 : 2 );
164  }
165  }
166 
173  protected function sqlDoQuery( IDatabase $db, $line, $dieOnError ) {
174  try {
175  $res = $db->query( $line );
176  return $this->sqlPrintResult( $res, $db );
177  } catch ( DBQueryError $e ) {
178  if ( $dieOnError ) {
179  $this->fatalError( $e );
180  } else {
181  $this->error( $e );
182  }
183  }
184  return null;
185  }
186 
193  public function sqlPrintResult( $res, $db ) {
194  if ( !$res ) {
195  // Do nothing
196  return null;
197  } elseif ( is_object( $res ) ) {
198  $out = '';
199  $rows = [];
200  foreach ( $res as $row ) {
201  $out .= print_r( $row, true );
202  $rows[] = $row;
203  }
204  if ( $this->hasOption( 'json' ) ) {
205  $out = json_encode( $rows, JSON_PRETTY_PRINT );
206  } elseif ( !$rows ) {
207  $out = 'Query OK, 0 row(s) affected';
208  }
209  $this->output( $out . "\n" );
210  return count( $rows );
211  } else {
212  $affected = $db->affectedRows();
213  if ( $this->hasOption( 'json' ) ) {
214  $this->output( json_encode( [ 'affected' => $affected ], JSON_PRETTY_PRINT ) . "\n" );
215  } else {
216  $this->output( "Query OK, $affected row(s) affected\n" );
217  }
218  return $affected;
219  }
220  }
221 
225  public function getDbType() {
226  return Maintenance::DB_ADMIN;
227  }
228 }
229 
231 require_once RUN_MAINTENANCE_IF_MAIN;
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Definition: hooks.txt:2633
getArg( $argId=0, $default=null)
Get an argument.
null for the local wiki Added should default to null in handler for backwards compatibility add a value to it if you want to add a cookie that have to vary cache options can modify $query
Definition: hooks.txt:1585
error( $err, $die=0)
Throw an error to the user.
$IP
Definition: WebStart.php:41
Apache License January AND DISTRIBUTION Definitions License shall mean the terms and conditions for use
getOption( $name, $default=null)
Get an option, or return the default.
if(PHP_SAPI !='cli-server') if(!isset( $_SERVER['SCRIPT_FILENAME'])) $file
Definition: router.php:42
div flags Integer display flags(NO_ACTION_LINK, NO_EXTRA_USER_LINKS) 'LogException' returning false will NOT prevent logging $e
Definition: hooks.txt:2159
Abstract maintenance class for quickly writing and churning out maintenance scripts with minimal effo...
Definition: maintenance.txt:39
static readconsole( $prompt='> ')
Prompt the console for input.
Maintenance script that sends SQL queries from the specified file to the database.
Definition: sql.php:37
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 MediaWikiServices
Definition: injection.txt:23
__construct()
Definition: sql.php:38
hasOption( $name)
Checks to see if a particular option exists.
require_once RUN_MAINTENANCE_IF_MAIN
Definition: maintenance.txt:50
sqlDoQuery(IDatabase $db, $line, $dieOnError)
Definition: sql.php:173
execute()
Definition: sql.php:54
const DB_MASTER
Definition: defines.php:26
this hook is for auditing only or null if authentication failed before getting that far or null if we can t even determine that When $user is not it can be in the form of< username >< more info > e g for bot passwords intended to be added to log contexts Fields it might only if the login was with a bot password it is not rendered in wiki pages or galleries in category pages allow injecting custom HTML after the section Any uses of the hook need to handle escaping see BaseTemplate::getToolbox and BaseTemplate::makeListItem for details on the format of individual items inside of this array or by returning and letting standard HTTP rendering take place modifiable or by returning false and taking over the output $out
Definition: hooks.txt:780
hasArg( $argId=0)
Does a given argument exist?
$res
Definition: database.txt:21
wfWaitForSlaves( $ifWritesSince=null, $wiki=false, $cluster=false, $timeout=null)
Waits for the replica DBs to catch up to the master position.
addDescription( $text)
Set the description text.
const DB_ADMIN
Definition: Maintenance.php:87
this hook is for auditing only or null if authentication failed before getting that far or null if we can t even determine that When $user is not null
Definition: hooks.txt:780
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
static posix_isatty( $fd)
Wrapper for posix_isatty() We default as considering stdin a tty (for nice readline methods) but trea...
Basic database interface for live and lazy-loaded relation database handles.
Definition: IDatabase.php:38
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:52
$line
Definition: cdb.php:59
$page->newPageUpdater($user) $updater
Definition: pageupdater.txt:63
static newForDB(IMaintainableDatabase $db, $shared=false, Maintenance $maintenance=null)
addOption( $name, $description, $required=false, $withArg=false, $shortName=false, $multiOccurrence=false)
Add a parameter to the script.
$maintClass
Definition: sql.php:230
const DB_REPLICA
Definition: defines.php:25
sqlPrintResult( $res, $db)
Print the results, callback for $db->sourceStream()
Definition: sql.php:193
fatalError( $msg, $exitCode=1)
Output a message and terminate the current script.
query( $sql, $fname=__METHOD__, $flags=0)
Run an SQL query and return the result.
getDbType()
Definition: sql.php:225