maintenance/sql.php

   1 <?php
   2 /**
   3  * Send SQL queries from the specified file to the database, performing
   4  * variable replacement along the way.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  * http://www.gnu.org/copyleft/gpl.html
  20  *
  21  * @file
  22  * @ingroup Maintenance
  23  */
  24
  25 require_once __DIR__ . '/Maintenance.php';
  26
  27 /**
  28  * Maintenance script that sends SQL queries from the specified file to the database.
  29  *
  30  * @ingroup Maintenance
  31  */
  32 class MwSql extends Maintenance {
  33         public function __construct() {
  34                 parent::__construct();
  35                 $this->mDescription = "Send SQL queries to a MediaWiki database. " .
  36                                 "Takes a file name containing SQL as argument or runs interactively.";
  37                 $this->addOption( 'query', 'Run a single query instead of running interactively', false, true );
  38                 $this->addOption( 'cluster', 'Use an external cluster by name', false, true );
  39                 $this->addOption( 'wikidb', 'The database wiki ID to use if not the current one', false, true );
  40                 $this->addOption( 'slave', 'Use a slave server (either "any" or by name)', false, true );
  41         }
  42
  43         public function execute() {
  44                 // We wan't to allow "" for the wikidb, meaning don't call select_db()
  45                 $wiki = $this->hasOption( 'wikidb' ) ? $this->getOption( 'wikidb' ) : false;
  46                 // Get the appropriate load balancer (for this wiki)
  47                 if ( $this->hasOption( 'cluster' ) ) {
  48                         $lb = wfGetLBFactory()->getExternalLB( $this->getOption( 'cluster' ), $wiki );
  49                 } else {
  50                         $lb = wfGetLB( $wiki );
  51                 }
  52                 // Figure out which server to use
  53                 if ( $this->hasOption( 'slave' ) ) {
  54                         $server = $this->getOption( 'slave' );
  55                         if ( $server === 'any' ) {
  56                                 $index = DB_SLAVE;
  57                         } else {
  58                                 $index = null;
  59                                 $serverCount = $lb->getServerCount();
  60                                 for ( $i = 0; $i < $serverCount; ++$i ) {
  61                                         if ( $lb->getServerName( $i ) === $server ) {
  62                                                 $index = $i;
  63                                                 break;
  64                                         }
  65                                 }
  66                                 if ( $index === null ) {
  67                                         $this->error( "No slave server configured with the name '$server'.", 1 );
  68                                 }
  69                         }
  70                 } else {
  71                         $index = DB_MASTER;
  72                 }
  73                 // Get a DB handle (with this wiki's DB selected) from the appropriate load balancer
  74                 $db = $lb->getConnection( $index, array(), $wiki );
  75                 if ( $this->hasOption( 'slave' ) && $db->getLBInfo( 'master' ) !== null ) {
  76                         $this->error( "The server selected ({$db->getServer()}) is not a slave.", 1 );
  77                 }
  78
  79                 if ( $this->hasArg( 0 ) ) {
  80                         $file = fopen( $this->getArg( 0 ), 'r' );
  81                         if ( !$file ) {
  82                                 $this->error( "Unable to open input file", true );
  83                         }
  84
  85                         $error = $db->sourceStream( $file, false, array( $this, 'sqlPrintResult' ) );
  86                         if ( $error !== true ) {
  87                                 $this->error( $error, true );
  88                         } else {
  89                                 exit( 0 );
  90                         }
  91                 }
  92
  93                 if ( $this->hasOption( 'query' ) ) {
  94                         $query = $this->getOption( 'query' );
  95                         $this->sqlDoQuery( $db, $query, /* dieOnError */ true );
  96                         wfWaitForSlaves();
  97                         return;
  98                 }
  99
 100                 $useReadline = function_exists( 'readline_add_history' )
 101                         && Maintenance::posix_isatty( 0 /*STDIN*/ );
 102
 103                 if ( $useReadline ) {
 104                         global $IP;
 105                         $historyFile = isset( $_ENV['HOME'] ) ?
 106                                 "{$_ENV['HOME']}/.mwsql_history" : "$IP/maintenance/.mwsql_history";
 107                         readline_read_history( $historyFile );
 108                 }
 109
 110                 $wholeLine = '';
 111                 $newPrompt = '> ';
 112                 $prompt = $newPrompt;
 113                 $doDie = !Maintenance::posix_isatty( 0 );
 114                 while ( ( $line = Maintenance::readconsole( $prompt ) ) !== false ) {
 115                         if ( !$line ) {
 116                                 # User simply pressed return key
 117                                 continue;
 118                         }
 119                         $done = $db->streamStatementEnd( $wholeLine, $line );
 120
 121                         $wholeLine .= $line;
 122
 123                         if ( !$done ) {
 124                                 $wholeLine .= ' ';
 125                                 $prompt = '    -> ';
 126                                 continue;
 127                         }
 128                         if ( $useReadline ) {
 129                                 # Delimiter is eated by streamStatementEnd, we add it
 130                                 # up in the history (bug 37020)
 131                                 readline_add_history( $wholeLine . $db->getDelimiter() );
 132                                 readline_write_history( $historyFile );
 133                         }
 134                         $this->sqlDoQuery( $db, $wholeLine, $doDie );
 135                         $prompt = $newPrompt;
 136                         $wholeLine = '';
 137                 }
 138                 wfWaitForSlaves();
 139         }
 140
 141         protected function sqlDoQuery( $db, $line, $dieOnError ) {
 142                 try {
 143                         $res = $db->query( $line );
 144                         $this->sqlPrintResult( $res, $db );
 145                 } catch ( DBQueryError $e ) {
 146                         $this->error( $e, $dieOnError );
 147                 }
 148         }
 149
 150         /**
 151          * Print the results, callback for $db->sourceStream()
 152          * @param ResultWrapper $res The results object
 153          * @param DatabaseBase $db
 154          */
 155         public function sqlPrintResult( $res, $db ) {
 156                 if ( !$res ) {
 157                         // Do nothing
 158                         return;
 159                 } elseif ( is_object( $res ) && $res->numRows() ) {
 160                         foreach ( $res as $row ) {
 161                                 $this->output( print_r( $row, true ) );
 162                         }
 163                 } else {
 164                         $affected = $db->affectedRows();
 165                         $this->output( "Query OK, $affected row(s) affected\n" );
 166                 }
 167         }
 168
 169         /**
 170          * @return int DB_TYPE constant
 171          */
 172         public function getDbType() {
 173                 return Maintenance::DB_ADMIN;
 174         }
 175 }
 176
 177 $maintClass = "MwSql";
 178 require_once RUN_MAINTENANCE_IF_MAIN;