231 lines
6.9 KiB
PHP
231 lines
6.9 KiB
PHP
<?php
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/**
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* Send SQL queries from the specified file to the database, performing
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* variable replacement along the way.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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* @ingroup Maintenance
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*/
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require_once __DIR__ . '/Maintenance.php';
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use MediaWiki\MediaWikiServices;
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use Wikimedia\Rdbms\DBQueryError;
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use Wikimedia\Rdbms\IDatabase;
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use Wikimedia\Rdbms\IResultWrapper;
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/**
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* Maintenance script that sends SQL queries from the specified file to the database.
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*
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* @ingroup Maintenance
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*/
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class MwSql extends Maintenance {
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public function __construct() {
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parent::__construct();
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$this->addDescription( 'Send SQL queries to a MediaWiki database. ' .
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'Takes a file name containing SQL as argument or runs interactively.' );
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$this->addOption( 'query',
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'Run a single query instead of running interactively', false, true );
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$this->addOption( 'json', 'Output the results as JSON instead of PHP objects' );
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$this->addOption( 'status', 'Return successful exit status only if the query succeeded '
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. '(selected or altered rows), otherwise 1 for errors, 2 for no rows' );
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$this->addOption( 'cluster', 'Use an external cluster by name', false, true );
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$this->addOption( 'wikidb',
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'The database wiki ID to use if not the current one', false, true );
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$this->addOption( 'replicadb',
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'Replica DB server to use instead of the primary DB (can be "any")', false, true );
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}
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public function execute() {
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global $IP;
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// We wan't to allow "" for the wikidb, meaning don't call select_db()
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$wiki = $this->hasOption( 'wikidb' ) ? $this->getOption( 'wikidb' ) : false;
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// Get the appropriate load balancer (for this wiki)
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$lbFactory = MediaWikiServices::getInstance()->getDBLoadBalancerFactory();
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if ( $this->hasOption( 'cluster' ) ) {
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$lb = $lbFactory->getExternalLB( $this->getOption( 'cluster' ) );
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} else {
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$lb = $lbFactory->getMainLB( $wiki );
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}
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// Figure out which server to use
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$replicaDB = $this->getOption( 'replicadb', '' );
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if ( $replicaDB === 'any' ) {
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$index = DB_REPLICA;
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} elseif ( $replicaDB !== '' ) {
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$index = null;
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$serverCount = $lb->getServerCount();
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for ( $i = 0; $i < $serverCount; ++$i ) {
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if ( $lb->getServerName( $i ) === $replicaDB ) {
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$index = $i;
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break;
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}
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}
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if ( $index === null || $index === $lb->getWriterIndex() ) {
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$this->fatalError( "No replica DB server configured with the name '$replicaDB'." );
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}
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} else {
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$index = DB_PRIMARY;
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}
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$db = $lb->getMaintenanceConnectionRef( $index, [], $wiki );
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if ( $replicaDB != '' && $db->getLBInfo( 'master' ) !== null ) {
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$this->fatalError( "Server {$db->getServerName()} is not a replica DB." );
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}
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if ( $index === DB_PRIMARY ) {
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$updater = DatabaseUpdater::newForDB( $db, true, $this );
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$db->setSchemaVars( $updater->getSchemaVars() );
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}
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if ( $this->hasArg( 0 ) ) {
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$file = fopen( $this->getArg( 0 ), 'r' );
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if ( !$file ) {
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$this->fatalError( "Unable to open input file" );
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}
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$error = $db->sourceStream( $file, null, [ $this, 'sqlPrintResult' ], __METHOD__ );
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if ( $error !== true ) {
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$this->fatalError( $error );
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}
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return;
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}
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if ( $this->hasOption( 'query' ) ) {
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$query = $this->getOption( 'query' );
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$res = $this->sqlDoQuery( $db, $query, /* dieOnError */ true );
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$lbFactory->waitForReplication();
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if ( $this->hasOption( 'status' ) && !$res ) {
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$this->fatalError( 'Failed.', 2 );
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}
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return;
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}
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if (
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function_exists( 'readline_add_history' ) &&
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Maintenance::posix_isatty( 0 /*STDIN*/ )
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) {
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$historyFile = isset( $_ENV['HOME'] ) ?
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"{$_ENV['HOME']}/.mwsql_history" : "$IP/maintenance/.mwsql_history";
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readline_read_history( $historyFile );
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} else {
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$historyFile = null;
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}
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$wholeLine = '';
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$newPrompt = '> ';
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$prompt = $newPrompt;
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$doDie = !Maintenance::posix_isatty( 0 );
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$res = 1;
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while ( ( $line = Maintenance::readconsole( $prompt ) ) !== false ) {
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if ( !$line ) {
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# User simply pressed return key
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continue;
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}
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$done = $db->streamStatementEnd( $wholeLine, $line );
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$wholeLine .= $line;
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if ( !$done ) {
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$wholeLine .= ' ';
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$prompt = ' -> ';
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continue;
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}
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if ( $historyFile ) {
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# Delimiter is eated by streamStatementEnd, we add it
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# up in the history (T39020)
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readline_add_history( $wholeLine . ';' );
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readline_write_history( $historyFile );
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}
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// @phan-suppress-next-line SecurityCheck-SQLInjection
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$res = $this->sqlDoQuery( $db, $wholeLine, $doDie );
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$prompt = $newPrompt;
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$wholeLine = '';
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}
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$lbFactory->waitForReplication();
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if ( $this->hasOption( 'status' ) && !$res ) {
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$this->fatalError( 'Failed.', 2 );
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}
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}
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/**
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* @param IDatabase $db
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* @param string $line The SQL text of the query
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* @param bool $dieOnError
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* @return int|null Number of rows selected or updated, or null if the query was unsuccessful.
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*/
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protected function sqlDoQuery( IDatabase $db, $line, $dieOnError ) {
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try {
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$res = $db->query( $line, __METHOD__ );
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return $this->sqlPrintResult( $res, $db );
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} catch ( DBQueryError $e ) {
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if ( $dieOnError ) {
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$this->fatalError( (string)$e );
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} else {
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$this->error( (string)$e );
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}
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}
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return null;
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}
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/**
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* Print the results, callback for $db->sourceStream()
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* @param IResultWrapper|bool $res
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* @param IDatabase $db
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* @return int|null Number of rows selected or updated, or null if the query was unsuccessful.
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*/
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public function sqlPrintResult( $res, $db ) {
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if ( !$res ) {
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// Do nothing
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return null;
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} elseif ( is_object( $res ) ) {
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$out = '';
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$rows = [];
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foreach ( $res as $row ) {
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$out .= print_r( $row, true );
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$rows[] = $row;
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}
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if ( $this->hasOption( 'json' ) ) {
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$out = json_encode( $rows, JSON_PRETTY_PRINT );
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} elseif ( !$rows ) {
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$out = 'Query OK, 0 row(s) affected';
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}
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$this->output( $out . "\n" );
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return count( $rows );
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} else {
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$affected = $db->affectedRows();
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if ( $this->hasOption( 'json' ) ) {
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$this->output( json_encode( [ 'affected' => $affected ], JSON_PRETTY_PRINT ) . "\n" );
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} else {
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$this->output( "Query OK, $affected row(s) affected\n" );
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}
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return $affected;
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}
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}
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/**
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* @return int DB_TYPE constant
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*/
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public function getDbType() {
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return Maintenance::DB_ADMIN;
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}
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}
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$maintClass = MwSql::class;
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require_once RUN_MAINTENANCE_IF_MAIN;
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