2399 lines
64 KiB
PHP
2399 lines
64 KiB
PHP
<?php
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/**
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* This file deals with MySQL interface functions
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* and query specifics/optimisations
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*/
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/** Number of times to re-try an operation in case of deadlock */
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define( 'DEADLOCK_TRIES', 4 );
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/** Minimum time to wait before retry, in microseconds */
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define( 'DEADLOCK_DELAY_MIN', 500000 );
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/** Maximum time to wait before retry */
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define( 'DEADLOCK_DELAY_MAX', 1500000 );
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/******************************************************************************
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* Utility classes
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*****************************************************************************/
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/**
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* Utility class.
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* @addtogroup Database
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*/
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class DBObject {
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public $mData;
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function DBObject($data) {
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$this->mData = $data;
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}
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function isLOB() {
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return false;
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}
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function data() {
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return $this->mData;
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}
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};
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/**
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* Utility class.
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* @addtogroup Database
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*/
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class MySQLField {
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private $name, $tablename, $default, $max_length, $nullable,
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$is_pk, $is_unique, $is_key, $type;
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function __construct ($info) {
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$this->name = $info->name;
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$this->tablename = $info->table;
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$this->default = $info->def;
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$this->max_length = $info->max_length;
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$this->nullable = !$info->not_null;
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$this->is_pk = $info->primary_key;
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$this->is_unique = $info->unique_key;
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$this->is_multiple = $info->multiple_key;
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$this->is_key = ($this->is_pk || $this->is_unique || $this->is_multiple);
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$this->type = $info->type;
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}
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function name() {
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return $this->name;
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}
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function tableName() {
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return $this->tableName;
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}
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function defaultValue() {
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return $this->default;
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}
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function maxLength() {
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return $this->max_length;
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}
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function nullable() {
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return $this->nullable;
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}
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function isKey() {
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return $this->is_key;
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}
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function isMultipleKey() {
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return $this->is_multiple;
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}
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function type() {
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return $this->type;
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}
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}
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/******************************************************************************
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* Error classes
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*****************************************************************************/
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/**
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* Database error base class
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* @addtogroup Database
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*/
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class DBError extends MWException {
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public $db;
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/**
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* Construct a database error
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* @param Database $db The database object which threw the error
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* @param string $error A simple error message to be used for debugging
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*/
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function __construct( Database &$db, $error ) {
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$this->db =& $db;
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parent::__construct( $error );
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}
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}
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/**
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* @addtogroup Database
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*/
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class DBConnectionError extends DBError {
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public $error;
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function __construct( Database &$db, $error = 'unknown error' ) {
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$msg = 'DB connection error';
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if ( trim( $error ) != '' ) {
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$msg .= ": $error";
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}
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$this->error = $error;
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parent::__construct( $db, $msg );
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}
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function useOutputPage() {
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// Not likely to work
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return false;
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}
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function useMessageCache() {
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// Not likely to work
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return false;
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}
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function getText() {
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return $this->getMessage() . "\n";
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}
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function getLogMessage() {
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# Don't send to the exception log
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return false;
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}
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function getPageTitle() {
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global $wgSitename;
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return "$wgSitename has a problem";
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}
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function getHTML() {
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global $wgTitle, $wgUseFileCache, $title, $wgInputEncoding;
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global $wgSitename, $wgServer, $wgMessageCache;
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# I give up, Brion is right. Getting the message cache to work when there is no DB is tricky.
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# Hard coding strings instead.
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$noconnect = "<p><strong>Sorry! This site is experiencing technical difficulties.</strong></p><p>Try waiting a few minutes and reloading.</p><p><small>(Can't contact the database server: $1)</small></p>";
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$mainpage = 'Main Page';
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$searchdisabled = <<<EOT
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<p style="margin: 1.5em 2em 1em">$wgSitename search is disabled for performance reasons. You can search via Google in the meantime.
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<span style="font-size: 89%; display: block; margin-left: .2em">Note that their indexes of $wgSitename content may be out of date.</span></p>',
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EOT;
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$googlesearch = "
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<!-- SiteSearch Google -->
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<FORM method=GET action=\"http://www.google.com/search\">
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<TABLE bgcolor=\"#FFFFFF\"><tr><td>
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<A HREF=\"http://www.google.com/\">
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<IMG SRC=\"http://www.google.com/logos/Logo_40wht.gif\"
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border=\"0\" ALT=\"Google\"></A>
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</td>
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<td>
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<INPUT TYPE=text name=q size=31 maxlength=255 value=\"$1\">
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<INPUT type=submit name=btnG VALUE=\"Google Search\">
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<font size=-1>
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<input type=hidden name=domains value=\"$wgServer\"><br /><input type=radio name=sitesearch value=\"\"> WWW <input type=radio name=sitesearch value=\"$wgServer\" checked> $wgServer <br />
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<input type='hidden' name='ie' value='$2'>
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<input type='hidden' name='oe' value='$2'>
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</font>
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</td></tr></TABLE>
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</FORM>
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<!-- SiteSearch Google -->";
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$cachederror = "The following is a cached copy of the requested page, and may not be up to date. ";
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# No database access
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if ( is_object( $wgMessageCache ) ) {
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$wgMessageCache->disable();
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}
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if ( trim( $this->error ) == '' ) {
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$this->error = $this->db->getProperty('mServer');
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}
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$text = str_replace( '$1', $this->error, $noconnect );
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$text .= wfGetSiteNotice();
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if($wgUseFileCache) {
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if($wgTitle) {
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$t =& $wgTitle;
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} else {
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if($title) {
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$t = Title::newFromURL( $title );
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} elseif (@/**/$_REQUEST['search']) {
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$search = $_REQUEST['search'];
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return $searchdisabled .
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str_replace( array( '$1', '$2' ), array( htmlspecialchars( $search ),
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$wgInputEncoding ), $googlesearch );
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} else {
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$t = Title::newFromText( $mainpage );
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}
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}
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$cache = new HTMLFileCache( $t );
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if( $cache->isFileCached() ) {
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// FIXME: $msg is not defined on the next line.
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$msg = '<p style="color: red"><b>'.$msg."<br />\n" .
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$cachederror . "</b></p>\n";
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$tag = '<div id="article">';
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$text = str_replace(
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$tag,
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$tag . $msg,
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$cache->fetchPageText() );
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}
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}
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return $text;
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}
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}
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/**
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* @addtogroup Database
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*/
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class DBQueryError extends DBError {
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public $error, $errno, $sql, $fname;
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function __construct( Database &$db, $error, $errno, $sql, $fname ) {
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$message = "A database error has occurred\n" .
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"Query: $sql\n" .
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"Function: $fname\n" .
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"Error: $errno $error\n";
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parent::__construct( $db, $message );
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$this->error = $error;
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$this->errno = $errno;
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$this->sql = $sql;
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$this->fname = $fname;
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}
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function getText() {
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if ( $this->useMessageCache() ) {
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return wfMsg( 'dberrortextcl', htmlspecialchars( $this->getSQL() ),
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htmlspecialchars( $this->fname ), $this->errno, htmlspecialchars( $this->error ) ) . "\n";
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} else {
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return $this->getMessage();
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}
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}
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function getSQL() {
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global $wgShowSQLErrors;
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if( !$wgShowSQLErrors ) {
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return $this->msg( 'sqlhidden', 'SQL hidden' );
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} else {
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return $this->sql;
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}
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}
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function getLogMessage() {
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# Don't send to the exception log
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return false;
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}
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function getPageTitle() {
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return $this->msg( 'databaseerror', 'Database error' );
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}
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function getHTML() {
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if ( $this->useMessageCache() ) {
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return wfMsgNoDB( 'dberrortext', htmlspecialchars( $this->getSQL() ),
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htmlspecialchars( $this->fname ), $this->errno, htmlspecialchars( $this->error ) );
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} else {
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return nl2br( htmlspecialchars( $this->getMessage() ) );
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}
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}
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}
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/**
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* @addtogroup Database
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*/
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class DBUnexpectedError extends DBError {}
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/******************************************************************************/
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/**
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* Database abstraction object
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* @addtogroup Database
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*/
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class Database {
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#------------------------------------------------------------------------------
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# Variables
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#------------------------------------------------------------------------------
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protected $mLastQuery = '';
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protected $mServer, $mUser, $mPassword, $mConn = null, $mDBname;
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protected $mOut, $mOpened = false;
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protected $mFailFunction;
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protected $mTablePrefix;
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protected $mFlags;
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protected $mTrxLevel = 0;
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protected $mErrorCount = 0;
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protected $mLBInfo = array();
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#------------------------------------------------------------------------------
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# Accessors
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#------------------------------------------------------------------------------
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# These optionally set a variable and return the previous state
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/**
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* Fail function, takes a Database as a parameter
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* Set to false for default, 1 for ignore errors
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*/
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function failFunction( $function = NULL ) {
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return wfSetVar( $this->mFailFunction, $function );
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}
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/**
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* Output page, used for reporting errors
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* FALSE means discard output
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*/
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function setOutputPage( $out ) {
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$this->mOut = $out;
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}
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/**
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* Boolean, controls output of large amounts of debug information
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*/
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function debug( $debug = NULL ) {
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return wfSetBit( $this->mFlags, DBO_DEBUG, $debug );
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}
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/**
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* Turns buffering of SQL result sets on (true) or off (false).
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* Default is "on" and it should not be changed without good reasons.
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*/
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function bufferResults( $buffer = NULL ) {
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if ( is_null( $buffer ) ) {
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return !(bool)( $this->mFlags & DBO_NOBUFFER );
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} else {
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return !wfSetBit( $this->mFlags, DBO_NOBUFFER, !$buffer );
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}
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}
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/**
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* Turns on (false) or off (true) the automatic generation and sending
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* of a "we're sorry, but there has been a database error" page on
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* database errors. Default is on (false). When turned off, the
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* code should use lastErrno() and lastError() to handle the
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* situation as appropriate.
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*/
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function ignoreErrors( $ignoreErrors = NULL ) {
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return wfSetBit( $this->mFlags, DBO_IGNORE, $ignoreErrors );
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}
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/**
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* The current depth of nested transactions
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* @param $level Integer: , default NULL.
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*/
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function trxLevel( $level = NULL ) {
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return wfSetVar( $this->mTrxLevel, $level );
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}
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/**
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* Number of errors logged, only useful when errors are ignored
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*/
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function errorCount( $count = NULL ) {
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return wfSetVar( $this->mErrorCount, $count );
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}
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/**
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* Properties passed down from the server info array of the load balancer
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*/
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function getLBInfo( $name = NULL ) {
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if ( is_null( $name ) ) {
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return $this->mLBInfo;
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} else {
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if ( array_key_exists( $name, $this->mLBInfo ) ) {
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return $this->mLBInfo[$name];
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} else {
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return NULL;
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}
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}
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}
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function setLBInfo( $name, $value = NULL ) {
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if ( is_null( $value ) ) {
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$this->mLBInfo = $name;
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} else {
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$this->mLBInfo[$name] = $value;
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}
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}
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/**
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* Returns true if this database supports (and uses) cascading deletes
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*/
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function cascadingDeletes() {
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return false;
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}
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/**
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* Returns true if this database supports (and uses) triggers (e.g. on the page table)
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*/
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function cleanupTriggers() {
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return false;
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}
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/**
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* Returns true if this database is strict about what can be put into an IP field.
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* Specifically, it uses a NULL value instead of an empty string.
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*/
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function strictIPs() {
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return false;
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}
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/**
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* Returns true if this database uses timestamps rather than integers
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*/
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function realTimestamps() {
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return false;
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}
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/**
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* Returns true if this database does an implicit sort when doing GROUP BY
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*/
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function implicitGroupby() {
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return true;
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}
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/**
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* Returns true if this database can do a native search on IP columns
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* e.g. this works as expected: .. WHERE rc_ip = '127.42.12.102/32';
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*/
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function searchableIPs() {
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return false;
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}
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/**
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* Returns true if this database can use functional indexes
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*/
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function functionalIndexes() {
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return false;
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}
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/**#@+
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* Get function
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*/
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function lastQuery() { return $this->mLastQuery; }
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function isOpen() { return $this->mOpened; }
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/**#@-*/
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function setFlag( $flag ) {
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$this->mFlags |= $flag;
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}
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function clearFlag( $flag ) {
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$this->mFlags &= ~$flag;
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}
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function getFlag( $flag ) {
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return !!($this->mFlags & $flag);
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}
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/**
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* General read-only accessor
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*/
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function getProperty( $name ) {
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return $this->$name;
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}
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#------------------------------------------------------------------------------
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# Other functions
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#------------------------------------------------------------------------------
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/**@{{
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* Constructor.
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* @param string $server database server host
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* @param string $user database user name
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* @param string $password database user password
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* @param string $dbname database name
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* @param failFunction
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* @param $flags
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* @param $tablePrefix String: database table prefixes. By default use the prefix gave in LocalSettings.php
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*/
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function __construct( $server = false, $user = false, $password = false, $dbName = false,
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$failFunction = false, $flags = 0, $tablePrefix = 'get from global' ) {
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global $wgOut, $wgDBprefix, $wgCommandLineMode;
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# Can't get a reference if it hasn't been set yet
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if ( !isset( $wgOut ) ) {
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$wgOut = NULL;
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}
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$this->mOut =& $wgOut;
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$this->mFailFunction = $failFunction;
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$this->mFlags = $flags;
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if ( $this->mFlags & DBO_DEFAULT ) {
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if ( $wgCommandLineMode ) {
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$this->mFlags &= ~DBO_TRX;
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} else {
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$this->mFlags |= DBO_TRX;
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}
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}
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/*
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// Faster read-only access
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if ( wfReadOnly() ) {
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$this->mFlags |= DBO_PERSISTENT;
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$this->mFlags &= ~DBO_TRX;
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}*/
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/** Get the default table prefix*/
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if ( $tablePrefix == 'get from global' ) {
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$this->mTablePrefix = $wgDBprefix;
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} else {
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$this->mTablePrefix = $tablePrefix;
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}
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if ( $server ) {
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$this->open( $server, $user, $password, $dbName );
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}
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}
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|
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/**
|
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* @static
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* @param failFunction
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* @param $flags
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*/
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static function newFromParams( $server, $user, $password, $dbName, $failFunction = false, $flags = 0 )
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{
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return new Database( $server, $user, $password, $dbName, $failFunction, $flags );
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}
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|
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/**
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* Usually aborts on failure
|
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* If the failFunction is set to a non-zero integer, returns success
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*/
|
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function open( $server, $user, $password, $dbName ) {
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global $wguname;
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wfProfileIn( __METHOD__ );
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|
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# Test for missing mysql.so
|
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# First try to load it
|
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if (!@extension_loaded('mysql')) {
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@dl('mysql.so');
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}
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|
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# Fail now
|
|
# Otherwise we get a suppressed fatal error, which is very hard to track down
|
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if ( !function_exists( 'mysql_connect' ) ) {
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throw new DBConnectionError( $this, "MySQL functions missing, have you compiled PHP with the --with-mysql option?\n" );
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}
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$this->close();
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$this->mServer = $server;
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$this->mUser = $user;
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$this->mPassword = $password;
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$this->mDBname = $dbName;
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$success = false;
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wfProfileIn("dbconnect-$server");
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|
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# LIVE PATCH by Tim, ask Domas for why: retry loop
|
|
$this->mConn = false;
|
|
$max = 3;
|
|
for ( $i = 0; $i < $max && !$this->mConn; $i++ ) {
|
|
if ( $i > 1 ) {
|
|
usleep( 1000 );
|
|
}
|
|
if ( $this->mFlags & DBO_PERSISTENT ) {
|
|
@/**/$this->mConn = mysql_pconnect( $server, $user, $password );
|
|
} else {
|
|
# Create a new connection...
|
|
@/**/$this->mConn = mysql_connect( $server, $user, $password, true );
|
|
}
|
|
if ($this->mConn === false) {
|
|
#$iplus = $i + 1;
|
|
#wfLogDBError("Connect loop error $iplus of $max ($server): " . mysql_errno() . " - " . mysql_error()."\n");
|
|
}
|
|
}
|
|
|
|
wfProfileOut("dbconnect-$server");
|
|
|
|
if ( $dbName != '' ) {
|
|
if ( $this->mConn !== false ) {
|
|
$success = @/**/mysql_select_db( $dbName, $this->mConn );
|
|
if ( !$success ) {
|
|
$error = "Error selecting database $dbName on server {$this->mServer} " .
|
|
"from client host {$wguname['nodename']}\n";
|
|
wfLogDBError(" Error selecting database $dbName on server {$this->mServer} \n");
|
|
wfDebug( $error );
|
|
}
|
|
} else {
|
|
wfDebug( "DB connection error\n" );
|
|
wfDebug( "Server: $server, User: $user, Password: " .
|
|
substr( $password, 0, 3 ) . "..., error: " . mysql_error() . "\n" );
|
|
$success = false;
|
|
}
|
|
} else {
|
|
# Delay USE query
|
|
$success = (bool)$this->mConn;
|
|
}
|
|
|
|
if ( $success ) {
|
|
$version = $this->getServerVersion();
|
|
if ( version_compare( $version, '4.1' ) >= 0 ) {
|
|
// Tell the server we're communicating with it in UTF-8.
|
|
// This may engage various charset conversions.
|
|
global $wgDBmysql5;
|
|
if( $wgDBmysql5 ) {
|
|
$this->query( 'SET NAMES utf8', __METHOD__ );
|
|
}
|
|
// Turn off strict mode
|
|
$this->query( "SET sql_mode = ''", __METHOD__ );
|
|
}
|
|
|
|
// Turn off strict mode if it is on
|
|
} else {
|
|
$this->reportConnectionError();
|
|
}
|
|
|
|
$this->mOpened = $success;
|
|
wfProfileOut( __METHOD__ );
|
|
return $success;
|
|
}
|
|
/**@}}*/
|
|
|
|
/**
|
|
* Closes a database connection.
|
|
* if it is open : commits any open transactions
|
|
*
|
|
* @return bool operation success. true if already closed.
|
|
*/
|
|
function close()
|
|
{
|
|
$this->mOpened = false;
|
|
if ( $this->mConn ) {
|
|
if ( $this->trxLevel() ) {
|
|
$this->immediateCommit();
|
|
}
|
|
return mysql_close( $this->mConn );
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @param string $error fallback error message, used if none is given by MySQL
|
|
*/
|
|
function reportConnectionError( $error = 'Unknown error' ) {
|
|
$myError = $this->lastError();
|
|
if ( $myError ) {
|
|
$error = $myError;
|
|
}
|
|
|
|
if ( $this->mFailFunction ) {
|
|
# Legacy error handling method
|
|
if ( !is_int( $this->mFailFunction ) ) {
|
|
$ff = $this->mFailFunction;
|
|
$ff( $this, $error );
|
|
}
|
|
} else {
|
|
# New method
|
|
wfLogDBError( "Connection error: $error\n" );
|
|
throw new DBConnectionError( $this, $error );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Usually aborts on failure. If errors are explicitly ignored, returns success.
|
|
*
|
|
* @param $sql String: SQL query
|
|
* @param $fname String: Name of the calling function, for profiling/SHOW PROCESSLIST
|
|
* comment (you can use __METHOD__ or add some extra info)
|
|
* @param $tempIgnore Bool: Whether to avoid throwing an exception on errors...
|
|
* maybe best to catch the exception instead?
|
|
* @return true for a successful write query, ResultWrapper object for a successful read query,
|
|
* or false on failure if $tempIgnore set
|
|
* @throws DBQueryError Thrown when the database returns an error of any kind
|
|
*/
|
|
public function query( $sql, $fname = '', $tempIgnore = false ) {
|
|
global $wgProfiling;
|
|
|
|
if ( $wgProfiling ) {
|
|
# generalizeSQL will probably cut down the query to reasonable
|
|
# logging size most of the time. The substr is really just a sanity check.
|
|
|
|
# Who's been wasting my precious column space? -- TS
|
|
#$profName = 'query: ' . $fname . ' ' . substr( Database::generalizeSQL( $sql ), 0, 255 );
|
|
|
|
if ( is_null( $this->getLBInfo( 'master' ) ) ) {
|
|
$queryProf = 'query: ' . substr( Database::generalizeSQL( $sql ), 0, 255 );
|
|
$totalProf = 'Database::query';
|
|
} else {
|
|
$queryProf = 'query-m: ' . substr( Database::generalizeSQL( $sql ), 0, 255 );
|
|
$totalProf = 'Database::query-master';
|
|
}
|
|
wfProfileIn( $totalProf );
|
|
wfProfileIn( $queryProf );
|
|
}
|
|
|
|
$this->mLastQuery = $sql;
|
|
|
|
# Add a comment for easy SHOW PROCESSLIST interpretation
|
|
#if ( $fname ) {
|
|
global $wgUser;
|
|
if ( is_object( $wgUser ) && !($wgUser instanceof StubObject) ) {
|
|
$userName = $wgUser->getName();
|
|
if ( strlen( $userName ) > 15 ) {
|
|
$userName = substr( $userName, 0, 15 ) . '...';
|
|
}
|
|
$userName = str_replace( '/', '', $userName );
|
|
} else {
|
|
$userName = '';
|
|
}
|
|
$commentedSql = preg_replace('/\s/', " /* $fname $userName */ ", $sql, 1);
|
|
#} else {
|
|
# $commentedSql = $sql;
|
|
#}
|
|
|
|
# If DBO_TRX is set, start a transaction
|
|
if ( ( $this->mFlags & DBO_TRX ) && !$this->trxLevel() &&
|
|
$sql != 'BEGIN' && $sql != 'COMMIT' && $sql != 'ROLLBACK'
|
|
) {
|
|
$this->begin();
|
|
}
|
|
|
|
if ( $this->debug() ) {
|
|
$sqlx = substr( $commentedSql, 0, 500 );
|
|
$sqlx = strtr( $sqlx, "\t\n", ' ' );
|
|
wfDebug( "SQL: $sqlx\n" );
|
|
}
|
|
|
|
# Do the query and handle errors
|
|
$ret = $this->doQuery( $commentedSql );
|
|
|
|
# Try reconnecting if the connection was lost
|
|
if ( false === $ret && ( $this->lastErrno() == 2013 || $this->lastErrno() == 2006 ) ) {
|
|
# Transaction is gone, like it or not
|
|
$this->mTrxLevel = 0;
|
|
wfDebug( "Connection lost, reconnecting...\n" );
|
|
if ( $this->ping() ) {
|
|
wfDebug( "Reconnected\n" );
|
|
$sqlx = substr( $commentedSql, 0, 500 );
|
|
$sqlx = strtr( $sqlx, "\t\n", ' ' );
|
|
global $wgRequestTime;
|
|
$elapsed = round( microtime(true) - $wgRequestTime, 3 );
|
|
wfLogDBError( "Connection lost and reconnected after {$elapsed}s, query: $sqlx\n" );
|
|
$ret = $this->doQuery( $commentedSql );
|
|
} else {
|
|
wfDebug( "Failed\n" );
|
|
}
|
|
}
|
|
|
|
if ( false === $ret ) {
|
|
$this->reportQueryError( $this->lastError(), $this->lastErrno(), $sql, $fname, $tempIgnore );
|
|
}
|
|
|
|
if ( $wgProfiling ) {
|
|
wfProfileOut( $queryProf );
|
|
wfProfileOut( $totalProf );
|
|
}
|
|
return $this->resultObject( $ret );
|
|
}
|
|
|
|
/**
|
|
* The DBMS-dependent part of query()
|
|
* @param $sql String: SQL query.
|
|
* @return Result object to feed to fetchObject, fetchRow, ...; or false on failure
|
|
* @access private
|
|
*/
|
|
/*private*/ function doQuery( $sql ) {
|
|
if( $this->bufferResults() ) {
|
|
$ret = mysql_query( $sql, $this->mConn );
|
|
} else {
|
|
$ret = mysql_unbuffered_query( $sql, $this->mConn );
|
|
}
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* @param $error
|
|
* @param $errno
|
|
* @param $sql
|
|
* @param string $fname
|
|
* @param bool $tempIgnore
|
|
*/
|
|
function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
|
|
global $wgCommandLineMode;
|
|
# Ignore errors during error handling to avoid infinite recursion
|
|
$ignore = $this->ignoreErrors( true );
|
|
++$this->mErrorCount;
|
|
|
|
if( $ignore || $tempIgnore ) {
|
|
wfDebug("SQL ERROR (ignored): $error\n");
|
|
$this->ignoreErrors( $ignore );
|
|
} else {
|
|
$sql1line = str_replace( "\n", "\\n", $sql );
|
|
wfLogDBError("$fname\t{$this->mServer}\t$errno\t$error\t$sql1line\n");
|
|
wfDebug("SQL ERROR: " . $error . "\n");
|
|
throw new DBQueryError( $this, $error, $errno, $sql, $fname );
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Intended to be compatible with the PEAR::DB wrapper functions.
|
|
* http://pear.php.net/manual/en/package.database.db.intro-execute.php
|
|
*
|
|
* ? = scalar value, quoted as necessary
|
|
* ! = raw SQL bit (a function for instance)
|
|
* & = filename; reads the file and inserts as a blob
|
|
* (we don't use this though...)
|
|
*/
|
|
function prepare( $sql, $func = 'Database::prepare' ) {
|
|
/* MySQL doesn't support prepared statements (yet), so just
|
|
pack up the query for reference. We'll manually replace
|
|
the bits later. */
|
|
return array( 'query' => $sql, 'func' => $func );
|
|
}
|
|
|
|
function freePrepared( $prepared ) {
|
|
/* No-op for MySQL */
|
|
}
|
|
|
|
/**
|
|
* Execute a prepared query with the various arguments
|
|
* @param string $prepared the prepared sql
|
|
* @param mixed $args Either an array here, or put scalars as varargs
|
|
*/
|
|
function execute( $prepared, $args = null ) {
|
|
if( !is_array( $args ) ) {
|
|
# Pull the var args
|
|
$args = func_get_args();
|
|
array_shift( $args );
|
|
}
|
|
$sql = $this->fillPrepared( $prepared['query'], $args );
|
|
return $this->query( $sql, $prepared['func'] );
|
|
}
|
|
|
|
/**
|
|
* Prepare & execute an SQL statement, quoting and inserting arguments
|
|
* in the appropriate places.
|
|
* @param string $query
|
|
* @param string $args ...
|
|
*/
|
|
function safeQuery( $query, $args = null ) {
|
|
$prepared = $this->prepare( $query, 'Database::safeQuery' );
|
|
if( !is_array( $args ) ) {
|
|
# Pull the var args
|
|
$args = func_get_args();
|
|
array_shift( $args );
|
|
}
|
|
$retval = $this->execute( $prepared, $args );
|
|
$this->freePrepared( $prepared );
|
|
return $retval;
|
|
}
|
|
|
|
/**
|
|
* For faking prepared SQL statements on DBs that don't support
|
|
* it directly.
|
|
* @param string $preparedSql - a 'preparable' SQL statement
|
|
* @param array $args - array of arguments to fill it with
|
|
* @return string executable SQL
|
|
*/
|
|
function fillPrepared( $preparedQuery, $args ) {
|
|
reset( $args );
|
|
$this->preparedArgs =& $args;
|
|
return preg_replace_callback( '/(\\\\[?!&]|[?!&])/',
|
|
array( &$this, 'fillPreparedArg' ), $preparedQuery );
|
|
}
|
|
|
|
/**
|
|
* preg_callback func for fillPrepared()
|
|
* The arguments should be in $this->preparedArgs and must not be touched
|
|
* while we're doing this.
|
|
*
|
|
* @param array $matches
|
|
* @return string
|
|
* @private
|
|
*/
|
|
function fillPreparedArg( $matches ) {
|
|
switch( $matches[1] ) {
|
|
case '\\?': return '?';
|
|
case '\\!': return '!';
|
|
case '\\&': return '&';
|
|
}
|
|
list( /* $n */ , $arg ) = each( $this->preparedArgs );
|
|
switch( $matches[1] ) {
|
|
case '?': return $this->addQuotes( $arg );
|
|
case '!': return $arg;
|
|
case '&':
|
|
# return $this->addQuotes( file_get_contents( $arg ) );
|
|
throw new DBUnexpectedError( $this, '& mode is not implemented. If it\'s really needed, uncomment the line above.' );
|
|
default:
|
|
throw new DBUnexpectedError( $this, 'Received invalid match. This should never happen!' );
|
|
}
|
|
}
|
|
|
|
/**#@+
|
|
* @param mixed $res A SQL result
|
|
*/
|
|
/**
|
|
* Free a result object
|
|
*/
|
|
function freeResult( $res ) {
|
|
if ( $res instanceof ResultWrapper ) {
|
|
$res = $res->result;
|
|
}
|
|
if ( !@/**/mysql_free_result( $res ) ) {
|
|
throw new DBUnexpectedError( $this, "Unable to free MySQL result" );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Fetch the next row from the given result object, in object form.
|
|
* Fields can be retrieved with $row->fieldname, with fields acting like
|
|
* member variables.
|
|
*
|
|
* @param $res SQL result object as returned from Database::query(), etc.
|
|
* @return MySQL row object
|
|
* @throws DBUnexpectedError Thrown if the database returns an error
|
|
*/
|
|
function fetchObject( $res ) {
|
|
if ( $res instanceof ResultWrapper ) {
|
|
$res = $res->result;
|
|
}
|
|
@/**/$row = mysql_fetch_object( $res );
|
|
if( $this->lastErrno() ) {
|
|
throw new DBUnexpectedError( $this, 'Error in fetchObject(): ' . htmlspecialchars( $this->lastError() ) );
|
|
}
|
|
return $row;
|
|
}
|
|
|
|
/**
|
|
* Fetch the next row from the given result object, in associative array
|
|
* form. Fields are retrieved with $row['fieldname'].
|
|
*
|
|
* @param $res SQL result object as returned from Database::query(), etc.
|
|
* @return MySQL row object
|
|
* @throws DBUnexpectedError Thrown if the database returns an error
|
|
*/
|
|
function fetchRow( $res ) {
|
|
if ( $res instanceof ResultWrapper ) {
|
|
$res = $res->result;
|
|
}
|
|
@/**/$row = mysql_fetch_array( $res );
|
|
if ( $this->lastErrno() ) {
|
|
throw new DBUnexpectedError( $this, 'Error in fetchRow(): ' . htmlspecialchars( $this->lastError() ) );
|
|
}
|
|
return $row;
|
|
}
|
|
|
|
/**
|
|
* Get the number of rows in a result object
|
|
*/
|
|
function numRows( $res ) {
|
|
if ( $res instanceof ResultWrapper ) {
|
|
$res = $res->result;
|
|
}
|
|
@/**/$n = mysql_num_rows( $res );
|
|
if( $this->lastErrno() ) {
|
|
throw new DBUnexpectedError( $this, 'Error in numRows(): ' . htmlspecialchars( $this->lastError() ) );
|
|
}
|
|
return $n;
|
|
}
|
|
|
|
/**
|
|
* Get the number of fields in a result object
|
|
* See documentation for mysql_num_fields()
|
|
*/
|
|
function numFields( $res ) {
|
|
if ( $res instanceof ResultWrapper ) {
|
|
$res = $res->result;
|
|
}
|
|
return mysql_num_fields( $res );
|
|
}
|
|
|
|
/**
|
|
* Get a field name in a result object
|
|
* See documentation for mysql_field_name():
|
|
* http://www.php.net/mysql_field_name
|
|
*/
|
|
function fieldName( $res, $n ) {
|
|
if ( $res instanceof ResultWrapper ) {
|
|
$res = $res->result;
|
|
}
|
|
return mysql_field_name( $res, $n );
|
|
}
|
|
|
|
/**
|
|
* Get the inserted value of an auto-increment row
|
|
*
|
|
* The value inserted should be fetched from nextSequenceValue()
|
|
*
|
|
* Example:
|
|
* $id = $dbw->nextSequenceValue('page_page_id_seq');
|
|
* $dbw->insert('page',array('page_id' => $id));
|
|
* $id = $dbw->insertId();
|
|
*/
|
|
function insertId() { return mysql_insert_id( $this->mConn ); }
|
|
|
|
/**
|
|
* Change the position of the cursor in a result object
|
|
* See mysql_data_seek()
|
|
*/
|
|
function dataSeek( $res, $row ) {
|
|
if ( $res instanceof ResultWrapper ) {
|
|
$res = $res->result;
|
|
}
|
|
return mysql_data_seek( $res, $row );
|
|
}
|
|
|
|
/**
|
|
* Get the last error number
|
|
* See mysql_errno()
|
|
*/
|
|
function lastErrno() {
|
|
if ( $this->mConn ) {
|
|
return mysql_errno( $this->mConn );
|
|
} else {
|
|
return mysql_errno();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get a description of the last error
|
|
* See mysql_error() for more details
|
|
*/
|
|
function lastError() {
|
|
if ( $this->mConn ) {
|
|
# Even if it's non-zero, it can still be invalid
|
|
wfSuppressWarnings();
|
|
$error = mysql_error( $this->mConn );
|
|
if ( !$error ) {
|
|
$error = mysql_error();
|
|
}
|
|
wfRestoreWarnings();
|
|
} else {
|
|
$error = mysql_error();
|
|
}
|
|
if( $error ) {
|
|
$error .= ' (' . $this->mServer . ')';
|
|
}
|
|
return $error;
|
|
}
|
|
/**
|
|
* Get the number of rows affected by the last write query
|
|
* See mysql_affected_rows() for more details
|
|
*/
|
|
function affectedRows() { return mysql_affected_rows( $this->mConn ); }
|
|
/**#@-*/ // end of template : @param $result
|
|
|
|
/**
|
|
* Simple UPDATE wrapper
|
|
* Usually aborts on failure
|
|
* If errors are explicitly ignored, returns success
|
|
*
|
|
* This function exists for historical reasons, Database::update() has a more standard
|
|
* calling convention and feature set
|
|
*/
|
|
function set( $table, $var, $value, $cond, $fname = 'Database::set' )
|
|
{
|
|
$table = $this->tableName( $table );
|
|
$sql = "UPDATE $table SET $var = '" .
|
|
$this->strencode( $value ) . "' WHERE ($cond)";
|
|
return (bool)$this->query( $sql, $fname );
|
|
}
|
|
|
|
/**
|
|
* Simple SELECT wrapper, returns a single field, input must be encoded
|
|
* Usually aborts on failure
|
|
* If errors are explicitly ignored, returns FALSE on failure
|
|
*/
|
|
function selectField( $table, $var, $cond='', $fname = 'Database::selectField', $options = array() ) {
|
|
if ( !is_array( $options ) ) {
|
|
$options = array( $options );
|
|
}
|
|
$options['LIMIT'] = 1;
|
|
|
|
$res = $this->select( $table, $var, $cond, $fname, $options );
|
|
if ( $res === false || !$this->numRows( $res ) ) {
|
|
return false;
|
|
}
|
|
$row = $this->fetchRow( $res );
|
|
if ( $row !== false ) {
|
|
$this->freeResult( $res );
|
|
return $row[0];
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns an optional USE INDEX clause to go after the table, and a
|
|
* string to go at the end of the query
|
|
*
|
|
* @private
|
|
*
|
|
* @param array $options an associative array of options to be turned into
|
|
* an SQL query, valid keys are listed in the function.
|
|
* @return array
|
|
*/
|
|
function makeSelectOptions( $options ) {
|
|
$preLimitTail = $postLimitTail = '';
|
|
$startOpts = '';
|
|
|
|
$noKeyOptions = array();
|
|
foreach ( $options as $key => $option ) {
|
|
if ( is_numeric( $key ) ) {
|
|
$noKeyOptions[$option] = true;
|
|
}
|
|
}
|
|
|
|
if ( isset( $options['GROUP BY'] ) ) $preLimitTail .= " GROUP BY {$options['GROUP BY']}";
|
|
if ( isset( $options['HAVING'] ) ) $preLimitTail .= " HAVING {$options['HAVING']}";
|
|
if ( isset( $options['ORDER BY'] ) ) $preLimitTail .= " ORDER BY {$options['ORDER BY']}";
|
|
|
|
//if (isset($options['LIMIT'])) {
|
|
// $tailOpts .= $this->limitResult('', $options['LIMIT'],
|
|
// isset($options['OFFSET']) ? $options['OFFSET']
|
|
// : false);
|
|
//}
|
|
|
|
if ( isset( $noKeyOptions['FOR UPDATE'] ) ) $postLimitTail .= ' FOR UPDATE';
|
|
if ( isset( $noKeyOptions['LOCK IN SHARE MODE'] ) ) $postLimitTail .= ' LOCK IN SHARE MODE';
|
|
if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) $startOpts .= 'DISTINCT';
|
|
|
|
# Various MySQL extensions
|
|
if ( isset( $noKeyOptions['STRAIGHT_JOIN'] ) ) $startOpts .= ' /*! STRAIGHT_JOIN */';
|
|
if ( isset( $noKeyOptions['HIGH_PRIORITY'] ) ) $startOpts .= ' HIGH_PRIORITY';
|
|
if ( isset( $noKeyOptions['SQL_BIG_RESULT'] ) ) $startOpts .= ' SQL_BIG_RESULT';
|
|
if ( isset( $noKeyOptions['SQL_BUFFER_RESULT'] ) ) $startOpts .= ' SQL_BUFFER_RESULT';
|
|
if ( isset( $noKeyOptions['SQL_SMALL_RESULT'] ) ) $startOpts .= ' SQL_SMALL_RESULT';
|
|
if ( isset( $noKeyOptions['SQL_CALC_FOUND_ROWS'] ) ) $startOpts .= ' SQL_CALC_FOUND_ROWS';
|
|
if ( isset( $noKeyOptions['SQL_CACHE'] ) ) $startOpts .= ' SQL_CACHE';
|
|
if ( isset( $noKeyOptions['SQL_NO_CACHE'] ) ) $startOpts .= ' SQL_NO_CACHE';
|
|
|
|
if ( isset( $options['USE INDEX'] ) && ! is_array( $options['USE INDEX'] ) ) {
|
|
$useIndex = $this->useIndexClause( $options['USE INDEX'] );
|
|
} else {
|
|
$useIndex = '';
|
|
}
|
|
|
|
return array( $startOpts, $useIndex, $preLimitTail, $postLimitTail );
|
|
}
|
|
|
|
/**
|
|
* SELECT wrapper
|
|
*
|
|
* @param mixed $table Array or string, table name(s) (prefix auto-added)
|
|
* @param mixed $vars Array or string, field name(s) to be retrieved
|
|
* @param mixed $conds Array or string, condition(s) for WHERE
|
|
* @param string $fname Calling function name (use __METHOD__) for logs/profiling
|
|
* @param array $options Associative array of options (e.g. array('GROUP BY' => 'page_title')),
|
|
* see Database::makeSelectOptions code for list of supported stuff
|
|
* @return mixed Database result resource (feed to Database::fetchObject or whatever), or false on failure
|
|
*/
|
|
function select( $table, $vars, $conds='', $fname = 'Database::select', $options = array() )
|
|
{
|
|
if( is_array( $vars ) ) {
|
|
$vars = implode( ',', $vars );
|
|
}
|
|
if( !is_array( $options ) ) {
|
|
$options = array( $options );
|
|
}
|
|
if( is_array( $table ) ) {
|
|
if ( isset( $options['USE INDEX'] ) && is_array( $options['USE INDEX'] ) )
|
|
$from = ' FROM ' . $this->tableNamesWithUseIndex( $table, $options['USE INDEX'] );
|
|
else
|
|
$from = ' FROM ' . implode( ',', array_map( array( &$this, 'tableName' ), $table ) );
|
|
} elseif ($table!='') {
|
|
if ($table{0}==' ') {
|
|
$from = ' FROM ' . $table;
|
|
} else {
|
|
$from = ' FROM ' . $this->tableName( $table );
|
|
}
|
|
} else {
|
|
$from = '';
|
|
}
|
|
|
|
list( $startOpts, $useIndex, $preLimitTail, $postLimitTail ) = $this->makeSelectOptions( $options );
|
|
|
|
if( !empty( $conds ) ) {
|
|
if ( is_array( $conds ) ) {
|
|
$conds = $this->makeList( $conds, LIST_AND );
|
|
}
|
|
$sql = "SELECT $startOpts $vars $from $useIndex WHERE $conds $preLimitTail";
|
|
} else {
|
|
$sql = "SELECT $startOpts $vars $from $useIndex $preLimitTail";
|
|
}
|
|
|
|
if (isset($options['LIMIT']))
|
|
$sql = $this->limitResult($sql, $options['LIMIT'],
|
|
isset($options['OFFSET']) ? $options['OFFSET'] : false);
|
|
$sql = "$sql $postLimitTail";
|
|
|
|
if (isset($options['EXPLAIN'])) {
|
|
$sql = 'EXPLAIN ' . $sql;
|
|
}
|
|
return $this->query( $sql, $fname );
|
|
}
|
|
|
|
/**
|
|
* Single row SELECT wrapper
|
|
* Aborts or returns FALSE on error
|
|
*
|
|
* $vars: the selected variables
|
|
* $conds: a condition map, terms are ANDed together.
|
|
* Items with numeric keys are taken to be literal conditions
|
|
* Takes an array of selected variables, and a condition map, which is ANDed
|
|
* e.g: selectRow( "page", array( "page_id" ), array( "page_namespace" =>
|
|
* NS_MAIN, "page_title" => "Astronomy" ) ) would return an object where
|
|
* $obj- >page_id is the ID of the Astronomy article
|
|
*
|
|
* @todo migrate documentation to phpdocumentor format
|
|
*/
|
|
function selectRow( $table, $vars, $conds, $fname = 'Database::selectRow', $options = array() ) {
|
|
$options['LIMIT'] = 1;
|
|
$res = $this->select( $table, $vars, $conds, $fname, $options );
|
|
if ( $res === false )
|
|
return false;
|
|
if ( !$this->numRows($res) ) {
|
|
$this->freeResult($res);
|
|
return false;
|
|
}
|
|
$obj = $this->fetchObject( $res );
|
|
$this->freeResult( $res );
|
|
return $obj;
|
|
|
|
}
|
|
|
|
/**
|
|
* Estimate rows in dataset
|
|
* Returns estimated count, based on EXPLAIN output
|
|
* Takes same arguments as Database::select()
|
|
*/
|
|
|
|
function estimateRowCount( $table, $vars='*', $conds='', $fname = 'Database::estimateRowCount', $options = array() ) {
|
|
$options['EXPLAIN']=true;
|
|
$res = $this->select ($table, $vars, $conds, $fname, $options );
|
|
if ( $res === false )
|
|
return false;
|
|
if (!$this->numRows($res)) {
|
|
$this->freeResult($res);
|
|
return 0;
|
|
}
|
|
|
|
$rows=1;
|
|
|
|
while( $plan = $this->fetchObject( $res ) ) {
|
|
$rows *= ($plan->rows > 0)?$plan->rows:1; // avoid resetting to zero
|
|
}
|
|
|
|
$this->freeResult($res);
|
|
return $rows;
|
|
}
|
|
|
|
|
|
/**
|
|
* Removes most variables from an SQL query and replaces them with X or N for numbers.
|
|
* It's only slightly flawed. Don't use for anything important.
|
|
*
|
|
* @param string $sql A SQL Query
|
|
* @static
|
|
*/
|
|
static function generalizeSQL( $sql ) {
|
|
# This does the same as the regexp below would do, but in such a way
|
|
# as to avoid crashing php on some large strings.
|
|
# $sql = preg_replace ( "/'([^\\\\']|\\\\.)*'|\"([^\\\\\"]|\\\\.)*\"/", "'X'", $sql);
|
|
|
|
$sql = str_replace ( "\\\\", '', $sql);
|
|
$sql = str_replace ( "\\'", '', $sql);
|
|
$sql = str_replace ( "\\\"", '', $sql);
|
|
$sql = preg_replace ("/'.*'/s", "'X'", $sql);
|
|
$sql = preg_replace ('/".*"/s', "'X'", $sql);
|
|
|
|
# All newlines, tabs, etc replaced by single space
|
|
$sql = preg_replace ( '/\s+/', ' ', $sql);
|
|
|
|
# All numbers => N
|
|
$sql = preg_replace ('/-?[0-9]+/s', 'N', $sql);
|
|
|
|
return $sql;
|
|
}
|
|
|
|
/**
|
|
* Determines whether a field exists in a table
|
|
* Usually aborts on failure
|
|
* If errors are explicitly ignored, returns NULL on failure
|
|
*/
|
|
function fieldExists( $table, $field, $fname = 'Database::fieldExists' ) {
|
|
$table = $this->tableName( $table );
|
|
$res = $this->query( 'DESCRIBE '.$table, $fname );
|
|
if ( !$res ) {
|
|
return NULL;
|
|
}
|
|
|
|
$found = false;
|
|
|
|
while ( $row = $this->fetchObject( $res ) ) {
|
|
if ( $row->Field == $field ) {
|
|
$found = true;
|
|
break;
|
|
}
|
|
}
|
|
return $found;
|
|
}
|
|
|
|
/**
|
|
* Determines whether an index exists
|
|
* Usually aborts on failure
|
|
* If errors are explicitly ignored, returns NULL on failure
|
|
*/
|
|
function indexExists( $table, $index, $fname = 'Database::indexExists' ) {
|
|
$info = $this->indexInfo( $table, $index, $fname );
|
|
if ( is_null( $info ) ) {
|
|
return NULL;
|
|
} else {
|
|
return $info !== false;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Get information about an index into an object
|
|
* Returns false if the index does not exist
|
|
*/
|
|
function indexInfo( $table, $index, $fname = 'Database::indexInfo' ) {
|
|
# SHOW INDEX works in MySQL 3.23.58, but SHOW INDEXES does not.
|
|
# SHOW INDEX should work for 3.x and up:
|
|
# http://dev.mysql.com/doc/mysql/en/SHOW_INDEX.html
|
|
$table = $this->tableName( $table );
|
|
$sql = 'SHOW INDEX FROM '.$table;
|
|
$res = $this->query( $sql, $fname );
|
|
if ( !$res ) {
|
|
return NULL;
|
|
}
|
|
|
|
$result = array();
|
|
while ( $row = $this->fetchObject( $res ) ) {
|
|
if ( $row->Key_name == $index ) {
|
|
$result[] = $row;
|
|
}
|
|
}
|
|
$this->freeResult($res);
|
|
|
|
return empty($result) ? false : $result;
|
|
}
|
|
|
|
/**
|
|
* Query whether a given table exists
|
|
*/
|
|
function tableExists( $table ) {
|
|
$table = $this->tableName( $table );
|
|
$old = $this->ignoreErrors( true );
|
|
$res = $this->query( "SELECT 1 FROM $table LIMIT 1" );
|
|
$this->ignoreErrors( $old );
|
|
if( $res ) {
|
|
$this->freeResult( $res );
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* mysql_fetch_field() wrapper
|
|
* Returns false if the field doesn't exist
|
|
*
|
|
* @param $table
|
|
* @param $field
|
|
*/
|
|
function fieldInfo( $table, $field ) {
|
|
$table = $this->tableName( $table );
|
|
$res = $this->query( "SELECT * FROM $table LIMIT 1" );
|
|
$n = mysql_num_fields( $res->result );
|
|
for( $i = 0; $i < $n; $i++ ) {
|
|
$meta = mysql_fetch_field( $res->result, $i );
|
|
if( $field == $meta->name ) {
|
|
return new MySQLField($meta);
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* mysql_field_type() wrapper
|
|
*/
|
|
function fieldType( $res, $index ) {
|
|
if ( $res instanceof ResultWrapper ) {
|
|
$res = $res->result;
|
|
}
|
|
return mysql_field_type( $res, $index );
|
|
}
|
|
|
|
/**
|
|
* Determines if a given index is unique
|
|
*/
|
|
function indexUnique( $table, $index ) {
|
|
$indexInfo = $this->indexInfo( $table, $index );
|
|
if ( !$indexInfo ) {
|
|
return NULL;
|
|
}
|
|
return !$indexInfo[0]->Non_unique;
|
|
}
|
|
|
|
/**
|
|
* INSERT wrapper, inserts an array into a table
|
|
*
|
|
* $a may be a single associative array, or an array of these with numeric keys, for
|
|
* multi-row insert.
|
|
*
|
|
* Usually aborts on failure
|
|
* If errors are explicitly ignored, returns success
|
|
*/
|
|
function insert( $table, $a, $fname = 'Database::insert', $options = array() ) {
|
|
# No rows to insert, easy just return now
|
|
if ( !count( $a ) ) {
|
|
return true;
|
|
}
|
|
|
|
$table = $this->tableName( $table );
|
|
if ( !is_array( $options ) ) {
|
|
$options = array( $options );
|
|
}
|
|
if ( isset( $a[0] ) && is_array( $a[0] ) ) {
|
|
$multi = true;
|
|
$keys = array_keys( $a[0] );
|
|
} else {
|
|
$multi = false;
|
|
$keys = array_keys( $a );
|
|
}
|
|
|
|
$sql = 'INSERT ' . implode( ' ', $options ) .
|
|
" INTO $table (" . implode( ',', $keys ) . ') VALUES ';
|
|
|
|
if ( $multi ) {
|
|
$first = true;
|
|
foreach ( $a as $row ) {
|
|
if ( $first ) {
|
|
$first = false;
|
|
} else {
|
|
$sql .= ',';
|
|
}
|
|
$sql .= '(' . $this->makeList( $row ) . ')';
|
|
}
|
|
} else {
|
|
$sql .= '(' . $this->makeList( $a ) . ')';
|
|
}
|
|
return (bool)$this->query( $sql, $fname );
|
|
}
|
|
|
|
/**
|
|
* Make UPDATE options for the Database::update function
|
|
*
|
|
* @private
|
|
* @param array $options The options passed to Database::update
|
|
* @return string
|
|
*/
|
|
function makeUpdateOptions( $options ) {
|
|
if( !is_array( $options ) ) {
|
|
$options = array( $options );
|
|
}
|
|
$opts = array();
|
|
if ( in_array( 'LOW_PRIORITY', $options ) )
|
|
$opts[] = $this->lowPriorityOption();
|
|
if ( in_array( 'IGNORE', $options ) )
|
|
$opts[] = 'IGNORE';
|
|
return implode(' ', $opts);
|
|
}
|
|
|
|
/**
|
|
* UPDATE wrapper, takes a condition array and a SET array
|
|
*
|
|
* @param string $table The table to UPDATE
|
|
* @param array $values An array of values to SET
|
|
* @param array $conds An array of conditions (WHERE). Use '*' to update all rows.
|
|
* @param string $fname The Class::Function calling this function
|
|
* (for the log)
|
|
* @param array $options An array of UPDATE options, can be one or
|
|
* more of IGNORE, LOW_PRIORITY
|
|
* @return bool
|
|
*/
|
|
function update( $table, $values, $conds, $fname = 'Database::update', $options = array() ) {
|
|
$table = $this->tableName( $table );
|
|
$opts = $this->makeUpdateOptions( $options );
|
|
$sql = "UPDATE $opts $table SET " . $this->makeList( $values, LIST_SET );
|
|
if ( $conds != '*' ) {
|
|
$sql .= " WHERE " . $this->makeList( $conds, LIST_AND );
|
|
}
|
|
return $this->query( $sql, $fname );
|
|
}
|
|
|
|
/**
|
|
* Makes an encoded list of strings from an array
|
|
* $mode:
|
|
* LIST_COMMA - comma separated, no field names
|
|
* LIST_AND - ANDed WHERE clause (without the WHERE)
|
|
* LIST_OR - ORed WHERE clause (without the WHERE)
|
|
* LIST_SET - comma separated with field names, like a SET clause
|
|
* LIST_NAMES - comma separated field names
|
|
*/
|
|
function makeList( $a, $mode = LIST_COMMA ) {
|
|
if ( !is_array( $a ) ) {
|
|
throw new DBUnexpectedError( $this, 'Database::makeList called with incorrect parameters' );
|
|
}
|
|
|
|
$first = true;
|
|
$list = '';
|
|
foreach ( $a as $field => $value ) {
|
|
if ( !$first ) {
|
|
if ( $mode == LIST_AND ) {
|
|
$list .= ' AND ';
|
|
} elseif($mode == LIST_OR) {
|
|
$list .= ' OR ';
|
|
} else {
|
|
$list .= ',';
|
|
}
|
|
} else {
|
|
$first = false;
|
|
}
|
|
if ( ($mode == LIST_AND || $mode == LIST_OR) && is_numeric( $field ) ) {
|
|
$list .= "($value)";
|
|
} elseif ( ($mode == LIST_SET) && is_numeric( $field ) ) {
|
|
$list .= "$value";
|
|
} elseif ( ($mode == LIST_AND || $mode == LIST_OR) && is_array($value) ) {
|
|
$list .= $field." IN (".$this->makeList($value).") ";
|
|
} elseif( is_null($value) ) {
|
|
if ( $mode == LIST_AND || $mode == LIST_OR ) {
|
|
$list .= "$field IS ";
|
|
} elseif ( $mode == LIST_SET ) {
|
|
$list .= "$field = ";
|
|
}
|
|
$list .= 'NULL';
|
|
} else {
|
|
if ( $mode == LIST_AND || $mode == LIST_OR || $mode == LIST_SET ) {
|
|
$list .= "$field = ";
|
|
}
|
|
$list .= $mode == LIST_NAMES ? $value : $this->addQuotes( $value );
|
|
}
|
|
}
|
|
return $list;
|
|
}
|
|
|
|
/**
|
|
* Change the current database
|
|
*/
|
|
function selectDB( $db ) {
|
|
$this->mDBname = $db;
|
|
return mysql_select_db( $db, $this->mConn );
|
|
}
|
|
|
|
/**
|
|
* Format a table name ready for use in constructing an SQL query
|
|
*
|
|
* This does two important things: it quotes table names which as necessary,
|
|
* and it adds a table prefix if there is one.
|
|
*
|
|
* All functions of this object which require a table name call this function
|
|
* themselves. Pass the canonical name to such functions. This is only needed
|
|
* when calling query() directly.
|
|
*
|
|
* @param string $name database table name
|
|
*/
|
|
function tableName( $name ) {
|
|
global $wgSharedDB;
|
|
# Skip quoted literals
|
|
if ( $name{0} != '`' ) {
|
|
if ( $this->mTablePrefix !== '' && strpos( '.', $name ) === false ) {
|
|
$name = "{$this->mTablePrefix}$name";
|
|
}
|
|
if ( isset( $wgSharedDB ) && "{$this->mTablePrefix}user" == $name ) {
|
|
$name = "`$wgSharedDB`.`$name`";
|
|
} else {
|
|
# Standard quoting
|
|
$name = "`$name`";
|
|
}
|
|
}
|
|
return $name;
|
|
}
|
|
|
|
/**
|
|
* Fetch a number of table names into an array
|
|
* This is handy when you need to construct SQL for joins
|
|
*
|
|
* Example:
|
|
* extract($dbr->tableNames('user','watchlist'));
|
|
* $sql = "SELECT wl_namespace,wl_title FROM $watchlist,$user
|
|
* WHERE wl_user=user_id AND wl_user=$nameWithQuotes";
|
|
*/
|
|
public function tableNames() {
|
|
$inArray = func_get_args();
|
|
$retVal = array();
|
|
foreach ( $inArray as $name ) {
|
|
$retVal[$name] = $this->tableName( $name );
|
|
}
|
|
return $retVal;
|
|
}
|
|
|
|
/**
|
|
* Fetch a number of table names into an zero-indexed numerical array
|
|
* This is handy when you need to construct SQL for joins
|
|
*
|
|
* Example:
|
|
* list( $user, $watchlist ) = $dbr->tableNamesN('user','watchlist');
|
|
* $sql = "SELECT wl_namespace,wl_title FROM $watchlist,$user
|
|
* WHERE wl_user=user_id AND wl_user=$nameWithQuotes";
|
|
*/
|
|
public function tableNamesN() {
|
|
$inArray = func_get_args();
|
|
$retVal = array();
|
|
foreach ( $inArray as $name ) {
|
|
$retVal[] = $this->tableName( $name );
|
|
}
|
|
return $retVal;
|
|
}
|
|
|
|
/**
|
|
* @private
|
|
*/
|
|
function tableNamesWithUseIndex( $tables, $use_index ) {
|
|
$ret = array();
|
|
|
|
foreach ( $tables as $table )
|
|
if ( @$use_index[$table] !== null )
|
|
$ret[] = $this->tableName( $table ) . ' ' . $this->useIndexClause( implode( ',', (array)$use_index[$table] ) );
|
|
else
|
|
$ret[] = $this->tableName( $table );
|
|
|
|
return implode( ',', $ret );
|
|
}
|
|
|
|
/**
|
|
* Wrapper for addslashes()
|
|
* @param string $s String to be slashed.
|
|
* @return string slashed string.
|
|
*/
|
|
function strencode( $s ) {
|
|
return mysql_real_escape_string( $s, $this->mConn );
|
|
}
|
|
|
|
/**
|
|
* If it's a string, adds quotes and backslashes
|
|
* Otherwise returns as-is
|
|
*/
|
|
function addQuotes( $s ) {
|
|
if ( is_null( $s ) ) {
|
|
return 'NULL';
|
|
} else {
|
|
# This will also quote numeric values. This should be harmless,
|
|
# and protects against weird problems that occur when they really
|
|
# _are_ strings such as article titles and string->number->string
|
|
# conversion is not 1:1.
|
|
return "'" . $this->strencode( $s ) . "'";
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Escape string for safe LIKE usage
|
|
*/
|
|
function escapeLike( $s ) {
|
|
$s=$this->strencode( $s );
|
|
$s=str_replace(array('%','_'),array('\%','\_'),$s);
|
|
return $s;
|
|
}
|
|
|
|
/**
|
|
* Returns an appropriately quoted sequence value for inserting a new row.
|
|
* MySQL has autoincrement fields, so this is just NULL. But the PostgreSQL
|
|
* subclass will return an integer, and save the value for insertId()
|
|
*/
|
|
function nextSequenceValue( $seqName ) {
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* USE INDEX clause
|
|
* PostgreSQL doesn't have them and returns ""
|
|
*/
|
|
function useIndexClause( $index ) {
|
|
return "FORCE INDEX ($index)";
|
|
}
|
|
|
|
/**
|
|
* REPLACE query wrapper
|
|
* PostgreSQL simulates this with a DELETE followed by INSERT
|
|
* $row is the row to insert, an associative array
|
|
* $uniqueIndexes is an array of indexes. Each element may be either a
|
|
* field name or an array of field names
|
|
*
|
|
* It may be more efficient to leave off unique indexes which are unlikely to collide.
|
|
* However if you do this, you run the risk of encountering errors which wouldn't have
|
|
* occurred in MySQL
|
|
*
|
|
* @todo migrate comment to phodocumentor format
|
|
*/
|
|
function replace( $table, $uniqueIndexes, $rows, $fname = 'Database::replace' ) {
|
|
$table = $this->tableName( $table );
|
|
|
|
# Single row case
|
|
if ( !is_array( reset( $rows ) ) ) {
|
|
$rows = array( $rows );
|
|
}
|
|
|
|
$sql = "REPLACE INTO $table (" . implode( ',', array_keys( $rows[0] ) ) .') VALUES ';
|
|
$first = true;
|
|
foreach ( $rows as $row ) {
|
|
if ( $first ) {
|
|
$first = false;
|
|
} else {
|
|
$sql .= ',';
|
|
}
|
|
$sql .= '(' . $this->makeList( $row ) . ')';
|
|
}
|
|
return $this->query( $sql, $fname );
|
|
}
|
|
|
|
/**
|
|
* DELETE where the condition is a join
|
|
* MySQL does this with a multi-table DELETE syntax, PostgreSQL does it with sub-selects
|
|
*
|
|
* For safety, an empty $conds will not delete everything. If you want to delete all rows where the
|
|
* join condition matches, set $conds='*'
|
|
*
|
|
* DO NOT put the join condition in $conds
|
|
*
|
|
* @param string $delTable The table to delete from.
|
|
* @param string $joinTable The other table.
|
|
* @param string $delVar The variable to join on, in the first table.
|
|
* @param string $joinVar The variable to join on, in the second table.
|
|
* @param array $conds Condition array of field names mapped to variables, ANDed together in the WHERE clause
|
|
*/
|
|
function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = 'Database::deleteJoin' ) {
|
|
if ( !$conds ) {
|
|
throw new DBUnexpectedError( $this, 'Database::deleteJoin() called with empty $conds' );
|
|
}
|
|
|
|
$delTable = $this->tableName( $delTable );
|
|
$joinTable = $this->tableName( $joinTable );
|
|
$sql = "DELETE $delTable FROM $delTable, $joinTable WHERE $delVar=$joinVar ";
|
|
if ( $conds != '*' ) {
|
|
$sql .= ' AND ' . $this->makeList( $conds, LIST_AND );
|
|
}
|
|
|
|
return $this->query( $sql, $fname );
|
|
}
|
|
|
|
/**
|
|
* Returns the size of a text field, or -1 for "unlimited"
|
|
*/
|
|
function textFieldSize( $table, $field ) {
|
|
$table = $this->tableName( $table );
|
|
$sql = "SHOW COLUMNS FROM $table LIKE \"$field\";";
|
|
$res = $this->query( $sql, 'Database::textFieldSize' );
|
|
$row = $this->fetchObject( $res );
|
|
$this->freeResult( $res );
|
|
|
|
$m = array();
|
|
if ( preg_match( '/\((.*)\)/', $row->Type, $m ) ) {
|
|
$size = $m[1];
|
|
} else {
|
|
$size = -1;
|
|
}
|
|
return $size;
|
|
}
|
|
|
|
/**
|
|
* @return string Returns the text of the low priority option if it is supported, or a blank string otherwise
|
|
*/
|
|
function lowPriorityOption() {
|
|
return 'LOW_PRIORITY';
|
|
}
|
|
|
|
/**
|
|
* DELETE query wrapper
|
|
*
|
|
* Use $conds == "*" to delete all rows
|
|
*/
|
|
function delete( $table, $conds, $fname = 'Database::delete' ) {
|
|
if ( !$conds ) {
|
|
throw new DBUnexpectedError( $this, 'Database::delete() called with no conditions' );
|
|
}
|
|
$table = $this->tableName( $table );
|
|
$sql = "DELETE FROM $table";
|
|
if ( $conds != '*' ) {
|
|
$sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
|
|
}
|
|
return $this->query( $sql, $fname );
|
|
}
|
|
|
|
/**
|
|
* INSERT SELECT wrapper
|
|
* $varMap must be an associative array of the form array( 'dest1' => 'source1', ...)
|
|
* Source items may be literals rather than field names, but strings should be quoted with Database::addQuotes()
|
|
* $conds may be "*" to copy the whole table
|
|
* srcTable may be an array of tables.
|
|
*/
|
|
function insertSelect( $destTable, $srcTable, $varMap, $conds, $fname = 'Database::insertSelect',
|
|
$insertOptions = array(), $selectOptions = array() )
|
|
{
|
|
$destTable = $this->tableName( $destTable );
|
|
if ( is_array( $insertOptions ) ) {
|
|
$insertOptions = implode( ' ', $insertOptions );
|
|
}
|
|
if( !is_array( $selectOptions ) ) {
|
|
$selectOptions = array( $selectOptions );
|
|
}
|
|
list( $startOpts, $useIndex, $tailOpts ) = $this->makeSelectOptions( $selectOptions );
|
|
if( is_array( $srcTable ) ) {
|
|
$srcTable = implode( ',', array_map( array( &$this, 'tableName' ), $srcTable ) );
|
|
} else {
|
|
$srcTable = $this->tableName( $srcTable );
|
|
}
|
|
$sql = "INSERT $insertOptions INTO $destTable (" . implode( ',', array_keys( $varMap ) ) . ')' .
|
|
" SELECT $startOpts " . implode( ',', $varMap ) .
|
|
" FROM $srcTable $useIndex ";
|
|
if ( $conds != '*' ) {
|
|
$sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND );
|
|
}
|
|
$sql .= " $tailOpts";
|
|
return $this->query( $sql, $fname );
|
|
}
|
|
|
|
/**
|
|
* Construct a LIMIT query with optional offset
|
|
* This is used for query pages
|
|
* $sql string SQL query we will append the limit too
|
|
* $limit integer the SQL limit
|
|
* $offset integer the SQL offset (default false)
|
|
*/
|
|
function limitResult($sql, $limit, $offset=false) {
|
|
if( !is_numeric($limit) ) {
|
|
throw new DBUnexpectedError( $this, "Invalid non-numeric limit passed to limitResult()\n" );
|
|
}
|
|
return " $sql LIMIT "
|
|
. ( (is_numeric($offset) && $offset != 0) ? "{$offset}," : "" )
|
|
. "{$limit} ";
|
|
}
|
|
function limitResultForUpdate($sql, $num) {
|
|
return $this->limitResult($sql, $num, 0);
|
|
}
|
|
|
|
/**
|
|
* Returns an SQL expression for a simple conditional.
|
|
* Uses IF on MySQL.
|
|
*
|
|
* @param string $cond SQL expression which will result in a boolean value
|
|
* @param string $trueVal SQL expression to return if true
|
|
* @param string $falseVal SQL expression to return if false
|
|
* @return string SQL fragment
|
|
*/
|
|
function conditional( $cond, $trueVal, $falseVal ) {
|
|
return " IF($cond, $trueVal, $falseVal) ";
|
|
}
|
|
|
|
/**
|
|
* Determines if the last failure was due to a deadlock
|
|
*/
|
|
function wasDeadlock() {
|
|
return $this->lastErrno() == 1213;
|
|
}
|
|
|
|
/**
|
|
* Perform a deadlock-prone transaction.
|
|
*
|
|
* This function invokes a callback function to perform a set of write
|
|
* queries. If a deadlock occurs during the processing, the transaction
|
|
* will be rolled back and the callback function will be called again.
|
|
*
|
|
* Usage:
|
|
* $dbw->deadlockLoop( callback, ... );
|
|
*
|
|
* Extra arguments are passed through to the specified callback function.
|
|
*
|
|
* Returns whatever the callback function returned on its successful,
|
|
* iteration, or false on error, for example if the retry limit was
|
|
* reached.
|
|
*/
|
|
function deadlockLoop() {
|
|
$myFname = 'Database::deadlockLoop';
|
|
|
|
$this->begin();
|
|
$args = func_get_args();
|
|
$function = array_shift( $args );
|
|
$oldIgnore = $this->ignoreErrors( true );
|
|
$tries = DEADLOCK_TRIES;
|
|
if ( is_array( $function ) ) {
|
|
$fname = $function[0];
|
|
} else {
|
|
$fname = $function;
|
|
}
|
|
do {
|
|
$retVal = call_user_func_array( $function, $args );
|
|
$error = $this->lastError();
|
|
$errno = $this->lastErrno();
|
|
$sql = $this->lastQuery();
|
|
|
|
if ( $errno ) {
|
|
if ( $this->wasDeadlock() ) {
|
|
# Retry
|
|
usleep( mt_rand( DEADLOCK_DELAY_MIN, DEADLOCK_DELAY_MAX ) );
|
|
} else {
|
|
$this->reportQueryError( $error, $errno, $sql, $fname );
|
|
}
|
|
}
|
|
} while( $this->wasDeadlock() && --$tries > 0 );
|
|
$this->ignoreErrors( $oldIgnore );
|
|
if ( $tries <= 0 ) {
|
|
$this->query( 'ROLLBACK', $myFname );
|
|
$this->reportQueryError( $error, $errno, $sql, $fname );
|
|
return false;
|
|
} else {
|
|
$this->query( 'COMMIT', $myFname );
|
|
return $retVal;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Do a SELECT MASTER_POS_WAIT()
|
|
*
|
|
* @param string $file the binlog file
|
|
* @param string $pos the binlog position
|
|
* @param integer $timeout the maximum number of seconds to wait for synchronisation
|
|
*/
|
|
function masterPosWait( $file, $pos, $timeout ) {
|
|
$fname = 'Database::masterPosWait';
|
|
wfProfileIn( $fname );
|
|
|
|
|
|
# Commit any open transactions
|
|
$this->immediateCommit();
|
|
|
|
# Call doQuery() directly, to avoid opening a transaction if DBO_TRX is set
|
|
$encFile = $this->strencode( $file );
|
|
$sql = "SELECT MASTER_POS_WAIT('$encFile', $pos, $timeout)";
|
|
$res = $this->doQuery( $sql );
|
|
if ( $res && $row = $this->fetchRow( $res ) ) {
|
|
$this->freeResult( $res );
|
|
wfProfileOut( $fname );
|
|
return $row[0];
|
|
} else {
|
|
wfProfileOut( $fname );
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the position of the master from SHOW SLAVE STATUS
|
|
*/
|
|
function getSlavePos() {
|
|
$res = $this->query( 'SHOW SLAVE STATUS', 'Database::getSlavePos' );
|
|
$row = $this->fetchObject( $res );
|
|
if ( $row ) {
|
|
return array( $row->Master_Log_File, $row->Read_Master_Log_Pos );
|
|
} else {
|
|
return array( false, false );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the position of the master from SHOW MASTER STATUS
|
|
*/
|
|
function getMasterPos() {
|
|
$res = $this->query( 'SHOW MASTER STATUS', 'Database::getMasterPos' );
|
|
$row = $this->fetchObject( $res );
|
|
if ( $row ) {
|
|
return array( $row->File, $row->Position );
|
|
} else {
|
|
return array( false, false );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Begin a transaction, committing any previously open transaction
|
|
*/
|
|
function begin( $fname = 'Database::begin' ) {
|
|
$this->query( 'BEGIN', $fname );
|
|
$this->mTrxLevel = 1;
|
|
}
|
|
|
|
/**
|
|
* End a transaction
|
|
*/
|
|
function commit( $fname = 'Database::commit' ) {
|
|
$this->query( 'COMMIT', $fname );
|
|
$this->mTrxLevel = 0;
|
|
}
|
|
|
|
/**
|
|
* Rollback a transaction
|
|
*/
|
|
function rollback( $fname = 'Database::rollback' ) {
|
|
$this->query( 'ROLLBACK', $fname );
|
|
$this->mTrxLevel = 0;
|
|
}
|
|
|
|
/**
|
|
* Begin a transaction, committing any previously open transaction
|
|
* @deprecated use begin()
|
|
*/
|
|
function immediateBegin( $fname = 'Database::immediateBegin' ) {
|
|
$this->begin();
|
|
}
|
|
|
|
/**
|
|
* Commit transaction, if one is open
|
|
* @deprecated use commit()
|
|
*/
|
|
function immediateCommit( $fname = 'Database::immediateCommit' ) {
|
|
$this->commit();
|
|
}
|
|
|
|
/**
|
|
* Return MW-style timestamp used for MySQL schema
|
|
*/
|
|
function timestamp( $ts=0 ) {
|
|
return wfTimestamp(TS_MW,$ts);
|
|
}
|
|
|
|
/**
|
|
* Local database timestamp format or null
|
|
*/
|
|
function timestampOrNull( $ts = null ) {
|
|
if( is_null( $ts ) ) {
|
|
return null;
|
|
} else {
|
|
return $this->timestamp( $ts );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @todo document
|
|
*/
|
|
function resultObject( $result ) {
|
|
if( empty( $result ) ) {
|
|
return false;
|
|
} elseif ( $result instanceof ResultWrapper ) {
|
|
return $result;
|
|
} elseif ( $result === true ) {
|
|
// Successful write query
|
|
return $result;
|
|
} else {
|
|
return new ResultWrapper( $this, $result );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return aggregated value alias
|
|
*/
|
|
function aggregateValue ($valuedata,$valuename='value') {
|
|
return $valuename;
|
|
}
|
|
|
|
/**
|
|
* @return string wikitext of a link to the server software's web site
|
|
*/
|
|
function getSoftwareLink() {
|
|
return "[http://www.mysql.com/ MySQL]";
|
|
}
|
|
|
|
/**
|
|
* @return string Version information from the database
|
|
*/
|
|
function getServerVersion() {
|
|
return mysql_get_server_info( $this->mConn );
|
|
}
|
|
|
|
/**
|
|
* Ping the server and try to reconnect if it there is no connection
|
|
*/
|
|
function ping() {
|
|
if( function_exists( 'mysql_ping' ) ) {
|
|
return mysql_ping( $this->mConn );
|
|
} else {
|
|
wfDebug( "Tried to call mysql_ping but this is ancient PHP version. Faking it!\n" );
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get slave lag.
|
|
* At the moment, this will only work if the DB user has the PROCESS privilege
|
|
*/
|
|
function getLag() {
|
|
$res = $this->query( 'SHOW PROCESSLIST' );
|
|
# Find slave SQL thread
|
|
while ( $row = $this->fetchObject( $res ) ) {
|
|
/* This should work for most situations - when default db
|
|
* for thread is not specified, it had no events executed,
|
|
* and therefore it doesn't know yet how lagged it is.
|
|
*
|
|
* Relay log I/O thread does not select databases.
|
|
*/
|
|
if ( $row->User == 'system user' &&
|
|
$row->State != 'Waiting for master to send event' &&
|
|
$row->State != 'Connecting to master' &&
|
|
$row->State != 'Queueing master event to the relay log' &&
|
|
$row->State != 'Waiting for master update' &&
|
|
$row->State != 'Requesting binlog dump'
|
|
) {
|
|
# This is it, return the time (except -ve)
|
|
if ( $row->Time > 0x7fffffff ) {
|
|
return false;
|
|
} else {
|
|
return $row->Time;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Get status information from SHOW STATUS in an associative array
|
|
*/
|
|
function getStatus($which="%") {
|
|
$res = $this->query( "SHOW STATUS LIKE '{$which}'" );
|
|
$status = array();
|
|
while ( $row = $this->fetchObject( $res ) ) {
|
|
$status[$row->Variable_name] = $row->Value;
|
|
}
|
|
return $status;
|
|
}
|
|
|
|
/**
|
|
* Return the maximum number of items allowed in a list, or 0 for unlimited.
|
|
*/
|
|
function maxListLen() {
|
|
return 0;
|
|
}
|
|
|
|
function encodeBlob($b) {
|
|
return $b;
|
|
}
|
|
|
|
function decodeBlob($b) {
|
|
return $b;
|
|
}
|
|
|
|
/**
|
|
* Override database's default connection timeout.
|
|
* May be useful for very long batch queries such as
|
|
* full-wiki dumps, where a single query reads out
|
|
* over hours or days.
|
|
* @param int $timeout in seconds
|
|
*/
|
|
public function setTimeout( $timeout ) {
|
|
$this->query( "SET net_read_timeout=$timeout" );
|
|
$this->query( "SET net_write_timeout=$timeout" );
|
|
}
|
|
|
|
/**
|
|
* Read and execute SQL commands from a file.
|
|
* Returns true on success, error string on failure
|
|
* @param string $filename File name to open
|
|
* @param callback $lineCallback Optional function called before reading each line
|
|
* @param callback $resultCallback Optional function called for each MySQL result
|
|
*/
|
|
function sourceFile( $filename, $lineCallback = false, $resultCallback = false ) {
|
|
$fp = fopen( $filename, 'r' );
|
|
if ( false === $fp ) {
|
|
return "Could not open \"{$filename}\".\n";
|
|
}
|
|
$error = $this->sourceStream( $fp, $lineCallback, $resultCallback );
|
|
fclose( $fp );
|
|
return $error;
|
|
}
|
|
|
|
/**
|
|
* Read and execute commands from an open file handle
|
|
* Returns true on success, error string on failure
|
|
* @param string $fp File handle
|
|
* @param callback $lineCallback Optional function called before reading each line
|
|
* @param callback $resultCallback Optional function called for each MySQL result
|
|
*/
|
|
function sourceStream( $fp, $lineCallback = false, $resultCallback = false ) {
|
|
$cmd = "";
|
|
$done = false;
|
|
$dollarquote = false;
|
|
|
|
while ( ! feof( $fp ) ) {
|
|
if ( $lineCallback ) {
|
|
call_user_func( $lineCallback );
|
|
}
|
|
$line = trim( fgets( $fp, 1024 ) );
|
|
$sl = strlen( $line ) - 1;
|
|
|
|
if ( $sl < 0 ) { continue; }
|
|
if ( '-' == $line{0} && '-' == $line{1} ) { continue; }
|
|
|
|
## Allow dollar quoting for function declarations
|
|
if (substr($line,0,4) == '$mw$') {
|
|
if ($dollarquote) {
|
|
$dollarquote = false;
|
|
$done = true;
|
|
}
|
|
else {
|
|
$dollarquote = true;
|
|
}
|
|
}
|
|
else if (!$dollarquote) {
|
|
if ( ';' == $line{$sl} && ($sl < 2 || ';' != $line{$sl - 1})) {
|
|
$done = true;
|
|
$line = substr( $line, 0, $sl );
|
|
}
|
|
}
|
|
|
|
if ( '' != $cmd ) { $cmd .= ' '; }
|
|
$cmd .= "$line\n";
|
|
|
|
if ( $done ) {
|
|
$cmd = str_replace(';;', ";", $cmd);
|
|
$cmd = $this->replaceVars( $cmd );
|
|
$res = $this->query( $cmd, __METHOD__, true );
|
|
if ( $resultCallback ) {
|
|
call_user_func( $resultCallback, $res );
|
|
}
|
|
|
|
if ( false === $res ) {
|
|
$err = $this->lastError();
|
|
return "Query \"{$cmd}\" failed with error code \"$err\".\n";
|
|
}
|
|
|
|
$cmd = '';
|
|
$done = false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
|
|
/**
|
|
* Replace variables in sourced SQL
|
|
*/
|
|
protected function replaceVars( $ins ) {
|
|
$varnames = array(
|
|
'wgDBserver', 'wgDBname', 'wgDBintlname', 'wgDBuser',
|
|
'wgDBpassword', 'wgDBsqluser', 'wgDBsqlpassword',
|
|
'wgDBadminuser', 'wgDBadminpassword', 'wgDBTableOptions',
|
|
);
|
|
|
|
// Ordinary variables
|
|
foreach ( $varnames as $var ) {
|
|
if( isset( $GLOBALS[$var] ) ) {
|
|
$val = addslashes( $GLOBALS[$var] ); // FIXME: safety check?
|
|
$ins = str_replace( '{$' . $var . '}', $val, $ins );
|
|
$ins = str_replace( '/*$' . $var . '*/`', '`' . $val, $ins );
|
|
$ins = str_replace( '/*$' . $var . '*/', $val, $ins );
|
|
}
|
|
}
|
|
|
|
// Table prefixes
|
|
$ins = preg_replace_callback( '/\/\*(?:\$wgDBprefix|_)\*\/([a-z_]*)/',
|
|
array( &$this, 'tableNameCallback' ), $ins );
|
|
return $ins;
|
|
}
|
|
|
|
/**
|
|
* Table name callback
|
|
* @private
|
|
*/
|
|
protected function tableNameCallback( $matches ) {
|
|
return $this->tableName( $matches[1] );
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* Database abstraction object for mySQL
|
|
* Inherit all methods and properties of Database::Database()
|
|
*
|
|
* @addtogroup Database
|
|
* @see Database
|
|
*/
|
|
class DatabaseMysql extends Database {
|
|
# Inherit all
|
|
}
|
|
|
|
|
|
/**
|
|
* Result wrapper for grabbing data queried by someone else
|
|
* @addtogroup Database
|
|
*/
|
|
class ResultWrapper implements Iterator {
|
|
var $db, $result, $pos = 0, $currentRow = null;
|
|
|
|
/**
|
|
* Create a new result object from a result resource and a Database object
|
|
*/
|
|
function ResultWrapper( $database, $result ) {
|
|
$this->db = $database;
|
|
if ( $result instanceof ResultWrapper ) {
|
|
$this->result = $result->result;
|
|
} else {
|
|
$this->result = $result;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the number of rows in a result object
|
|
*/
|
|
function numRows() {
|
|
return $this->db->numRows( $this->result );
|
|
}
|
|
|
|
/**
|
|
* Fetch the next row from the given result object, in object form.
|
|
* Fields can be retrieved with $row->fieldname, with fields acting like
|
|
* member variables.
|
|
*
|
|
* @param $res SQL result object as returned from Database::query(), etc.
|
|
* @return MySQL row object
|
|
* @throws DBUnexpectedError Thrown if the database returns an error
|
|
*/
|
|
function fetchObject() {
|
|
return $this->db->fetchObject( $this->result );
|
|
}
|
|
|
|
/**
|
|
* Fetch the next row from the given result object, in associative array
|
|
* form. Fields are retrieved with $row['fieldname'].
|
|
*
|
|
* @param $res SQL result object as returned from Database::query(), etc.
|
|
* @return MySQL row object
|
|
* @throws DBUnexpectedError Thrown if the database returns an error
|
|
*/
|
|
function fetchRow() {
|
|
return $this->db->fetchRow( $this->result );
|
|
}
|
|
|
|
/**
|
|
* Free a result object
|
|
*/
|
|
function free() {
|
|
$this->db->freeResult( $this->result );
|
|
unset( $this->result );
|
|
unset( $this->db );
|
|
}
|
|
|
|
/**
|
|
* Change the position of the cursor in a result object
|
|
* See mysql_data_seek()
|
|
*/
|
|
function seek( $row ) {
|
|
$this->db->dataSeek( $this->result, $row );
|
|
}
|
|
|
|
/*********************
|
|
* Iterator functions
|
|
* Note that using these in combination with the non-iterator functions
|
|
* above may cause rows to be skipped or repeated.
|
|
*/
|
|
|
|
function rewind() {
|
|
if ($this->numRows()) {
|
|
$this->db->dataSeek($this->result, 0);
|
|
}
|
|
$this->pos = 0;
|
|
$this->currentRow = null;
|
|
}
|
|
|
|
function current() {
|
|
if ( is_null( $this->currentRow ) ) {
|
|
$this->next();
|
|
}
|
|
return $this->currentRow;
|
|
}
|
|
|
|
function key() {
|
|
return $this->pos;
|
|
}
|
|
|
|
function next() {
|
|
$this->pos++;
|
|
$this->currentRow = $this->fetchObject();
|
|
return $this->currentRow;
|
|
}
|
|
|
|
function valid() {
|
|
return $this->current() !== false;
|
|
}
|
|
}
|
|
|
|
|