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-rw-r--r--includes/DatabasePostgreSQL.php547
1 files changed, 547 insertions, 0 deletions
diff --git a/includes/DatabasePostgreSQL.php b/includes/DatabasePostgreSQL.php
new file mode 100644
index 000000000000..80c762ad3cb3
--- /dev/null
+++ b/includes/DatabasePostgreSQL.php
@@ -0,0 +1,547 @@
+<?php
+# $Id$
+#
+# DO NOT USE !!! Unless you want to help developping it.
+#
+# This file is an attempt to port the mysql database layer to postgreSQL. The
+# only thing done so far is s/mysql/pg/ and dieing if function haven't been
+# ported.
+#
+# As said brion 07/06/2004 :
+# "table definitions need to be changed. fulltext index needs to work differently
+# things that use the last insert id need to be changed. Probably other things
+# need to be changed. various semantics may be different."
+#
+# Hashar
+
+require_once( "FulltextStoplist.php" );
+require_once( "CacheManager.php" );
+
+define( "DB_READ", -1 );
+define( "DB_WRITE", -2 );
+define( "DB_LAST", -3 );
+
+define( "LIST_COMMA", 0 );
+define( "LIST_AND", 1 );
+define( "LIST_SET", 2 );
+
+class Database {
+
+#------------------------------------------------------------------------------
+# Variables
+#------------------------------------------------------------------------------
+ /* private */ var $mLastQuery = "";
+ /* private */ var $mBufferResults = true;
+ /* private */ var $mIgnoreErrors = false;
+
+ /* private */ var $mServer, $mUser, $mPassword, $mConn, $mDBname;
+ /* private */ var $mOut, $mDebug, $mOpened = false;
+
+ /* private */ var $mFailFunction;
+ /* private */ var $mLastResult;
+
+#------------------------------------------------------------------------------
+# Accessors
+#------------------------------------------------------------------------------
+ # Set functions
+ # These set a variable and return the previous state
+
+ # Fail function, takes a Database as a parameter
+ # Set to false for default, 1 for ignore errors
+ function setFailFunction( $function ) { return wfSetVar( $this->mFailFunction, $function ); }
+
+ # Output page, used for reporting errors
+ # FALSE means discard output
+ function &setOutputPage( &$out ) { $this->mOut =& $out; }
+
+ # Boolean, controls output of large amounts of debug information
+ function setDebug( $debug ) { return wfSetVar( $this->mDebug, $debug ); }
+
+ # Turns buffering of SQL result sets on (true) or off (false). Default is
+ # "on" and it should not be changed without good reasons.
+ function setBufferResults( $buffer ) { return wfSetVar( $this->mBufferResults, $buffer ); }
+
+ # Turns on (false) or off (true) the automatic generation and sending
+ # of a "we're sorry, but there has been a database error" page on
+ # database errors. Default is on (false). When turned off, the
+ # code should use wfLastErrno() and wfLastError() to handle the
+ # situation as appropriate.
+ function setIgnoreErrors( $ignoreErrors ) { return wfSetVar( $this->mIgnoreErrors, $ignoreErrors ); }
+
+ # Get functions
+
+ function lastQuery() { return $this->mLastQuery; }
+ function isOpen() { return $this->mOpened; }
+
+#------------------------------------------------------------------------------
+# Other functions
+#------------------------------------------------------------------------------
+
+ function Database()
+ {
+ global $wgOut;
+ # Can't get a reference if it hasn't been set yet
+ if ( !isset( $wgOut ) ) {
+ $wgOut = NULL;
+ }
+ $this->mOut =& $wgOut;
+
+ }
+
+ /* static */ function newFromParams( $server, $user, $password, $dbName,
+ $failFunction = false, $debug = false, $bufferResults = true, $ignoreErrors = false )
+ {
+ $db = new Database;
+ $db->mFailFunction = $failFunction;
+ $db->mIgnoreErrors = $ignoreErrors;
+ $db->mDebug = $debug;
+ $db->mBufferResults = $bufferResults;
+ $db->open( $server, $user, $password, $dbName );
+ return $db;
+ }
+
+ # Usually aborts on failure
+ # If the failFunction is set to a non-zero integer, returns success
+ function open( $server, $user, $password, $dbName )
+ {
+ global $wgEmergencyContact;
+
+ $this->close();
+ $this->mServer = $server;
+ $this->mUser = $user;
+ $this->mPassword = $password;
+ $this->mDBname = $dbName;
+
+ $success = false;
+
+
+ if ( "" != $dbName ) {
+ # start a database connection
+ @$this->mConn = pg_connect("host=$server dbname=$dbName user=$user password=$password");
+ if ( $this->mConn == false ) {
+ wfDebug( "DB connection error\n" );
+ wfDebug( "Server: $server, Database: $dbName, User: $user, Password: " . substr( $password, 0, 3 ) . "...\n" );
+ wfDebug( $this->lastError()."\n" );
+ }
+ }
+ return $this->mConn;
+ }
+
+ # Closes a database connection, if it is open
+ # Returns success, true if already closed
+ function close()
+ {
+ $this->mOpened = false;
+ if ( $this->mConn ) {
+ return pg_close( $this->mConn );
+ } else {
+ return true;
+ }
+ }
+
+ /* private */ function reportConnectionError( $msg = "")
+ {
+ if ( $this->mFailFunction ) {
+ if ( !is_int( $this->mFailFunction ) ) {
+ $this->$mFailFunction( $this );
+ }
+ } else {
+ wfEmergencyAbort( $this );
+ }
+ }
+
+ # Usually aborts on failure
+ # If errors are explicitly ignored, returns success
+ function query( $sql, $fname = "" )
+ {
+ 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.
+ $profName = "query: " . substr( Database::generalizeSQL( $sql ), 0, 255 );
+ wfProfileIn( $profName );
+ }
+
+ $this->mLastQuery = $sql;
+
+ if ( $this->mDebug ) {
+ $sqlx = substr( $sql, 0, 500 );
+ $sqlx = wordwrap(strtr($sqlx,"\t\n"," "));
+ wfDebug( "SQL: $sqlx\n" );
+ }
+
+ $ret = pg_query( $this->mConn , $sql);
+ $this->mLastResult = $ret;
+ if ( false == $ret ) {
+ $error = pg_last_error( $this->mConn );
+ // TODO FIXME : no error number function in postgre
+ // $errno = mysql_errno( $this->mConn );
+ if( $this->mIgnoreErrors ) {
+ wfDebug("SQL ERROR (ignored): " . $error . "\n");
+ } else {
+ wfDebug("SQL ERROR: " . $error . "\n");
+ if ( $this->mOut ) {
+ // this calls wfAbruptExit()
+ $this->mOut->databaseError( $fname, $sql, $error, 0 );
+ }
+ }
+ }
+
+ if ( $wgProfiling ) {
+ wfProfileOut( $profName );
+ }
+ return $ret;
+ }
+
+ function freeResult( $res ) {
+ if ( !@pg_free_result( $res ) ) {
+ wfDebugDieBacktrace( "Unable to free PostgreSQL result\n" );
+ }
+ }
+ function fetchObject( $res ) {
+ @$row = pg_fetch_object( $res );
+ # FIXME: HACK HACK HACK HACK debug
+
+ # TODO:
+ # hashar : not sure if the following test really trigger if the object
+ # fetching failled.
+ if( pg_last_error($this->mConn) ) {
+ wfDebugDieBacktrace( "SQL error: " . htmlspecialchars( pg_last_error($this->mConn) ) );
+ }
+ return $row;
+ }
+
+ function fetchRow( $res ) {
+ @$row = pg_fetch_array( $res );
+ if( pg_last_error($this->mConn) ) {
+ wfDebugDieBacktrace( "SQL error: " . htmlspecialchars( pg_last_error($this->mConn) ) );
+ }
+ return $row;
+ }
+
+ function numRows( $res ) {
+ @$n = pg_num_rows( $res );
+ if( pg_last_error($this->mConn) ) {
+ wfDebugDieBacktrace( "SQL error: " . htmlspecialchars( pg_last_error($this->mConn) ) );
+ }
+ return $n;
+ }
+ function numFields( $res ) { return pg_num_fields( $res ); }
+ function fieldName( $res, $n ) { return pg_field_name( $res, $n ); }
+ // TODO FIXME: need to implement something here
+ function insertId() {
+ //return mysql_insert_id( $this->mConn );
+ wfDebugDieBacktrace( "Database::insertId() error : not implemented for postgre, use sequences" );
+ }
+ function dataSeek( $res, $row ) { return pg_result_seek( $res, $row ); }
+ function lastErrno() { return $this->lastError(); }
+ function lastError() { return pg_last_error(); }
+ function affectedRows() {
+ return pg_affected_rows( $this->mLastResult );
+ }
+
+ # Simple UPDATE wrapper
+ # Usually aborts on failure
+ # If errors are explicitly ignored, returns success
+ function set( $table, $var, $value, $cond, $fname = "Database::set" )
+ {
+ $sql = "UPDATE \"$table\" SET \"$var\" = '" .
+ wfStrencode( $value ) . "' WHERE ($cond)";
+ return !!$this->query( $sql, DB_WRITE, $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 get( $table, $var, $cond, $fname = "Database::get" )
+ {
+ $from=$table?" FROM \"$table\" ":"";
+ $where=$cond?" WHERE ($cond)":"";
+
+ $sql = "SELECT $var $from $where";
+
+ $result = $this->query( $sql, DB_READ, $fname );
+
+ $ret = "";
+ if ( pg_num_rows( $result ) > 0 ) {
+ $s = pg_fetch_array( $result );
+ $ret = $s[0];
+ pg_free_result( $result );
+ }
+ return $ret;
+ }
+
+ # More complex SELECT wrapper, single row only
+ # Aborts or returns FALSE on error
+ # Takes an array of selected variables, and a condition map, which is ANDed
+ # e.g. getArray( "cur", array( "cur_id" ), array( "cur_namespace" => 0, "cur_title" => "Astronomy" ) )
+ # would return an object where $obj->cur_id is the ID of the Astronomy article
+ function getArray( $table, $vars, $conds, $fname = "Database::getArray" )
+ {
+ $vars = implode( ",", $vars );
+ $where = Database::makeList( $conds, LIST_AND );
+ $sql = "SELECT \"$vars\" FROM \"$table\" WHERE $where LIMIT 1";
+ $res = $this->query( $sql, $fname );
+ if ( $res === false || !$this->numRows( $res ) ) {
+ return false;
+ }
+ $obj = $this->fetchObject( $res );
+ $this->freeResult( $res );
+ return $obj;
+ }
+
+ # 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.
+ /* 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" )
+ {
+ $res = $this->query( "DESCRIBE '$table'", DB_READ, $fname );
+ if ( !$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" )
+ {
+ $sql = "SELECT indexname FROM pg_indexes WHERE tablename='$table'";
+ $res = $this->query( $sql, DB_READ, $fname );
+ if ( !$res ) {
+ return NULL;
+ }
+
+ $found = false;
+
+ while ( $row = $this->fetchObject( $res ) ) {
+ if ( $row->Key_name == $index ) {
+ $found = true;
+ break;
+ }
+ }
+ return $found;
+ }
+
+ function tableExists( $table )
+ {
+ $old = $this->mIgnoreErrors;
+ $this->mIgnoreErrors = true;
+ $res = $this->query( "SELECT 1 FROM '$table' LIMIT 1" );
+ $this->mIgnoreErrors = $old;
+ if( $res ) {
+ $this->freeResult( $res );
+ return true;
+ } else {
+ return false;
+ }
+ }
+
+ function fieldInfo( $table, $field )
+ {
+ $res = $this->query( "SELECT * FROM '$table' LIMIT 1" );
+ $n = pg_num_fields( $res );
+ for( $i = 0; $i < $n; $i++ ) {
+ // FIXME
+ wfDebugDieBacktrace( "Database::fieldInfo() error : mysql_fetch_field() not implemented for postgre" );
+ $meta = mysql_fetch_field( $res, $i );
+ if( $field == $meta->name ) {
+ return $meta;
+ }
+ }
+ return false;
+ }
+
+ # INSERT wrapper, inserts an array into a table
+ # Keys are field names, values are values
+ # Usually aborts on failure
+ # If errors are explicitly ignored, returns success
+ function insertArray( $table, $a, $fname = "Database::insertArray" )
+ {
+ $sql1 = "INSERT INTO \"$table\" (";
+ $sql2 = "VALUES (" . Database::makeList( $a );
+ $first = true;
+ foreach ( $a as $field => $value ) {
+ if ( !$first ) {
+ $sql1 .= ",";
+ }
+ $first = false;
+ $sql1 .= $field;
+ }
+ $sql = "$sql1) $sql2)";
+ return !!$this->query( $sql, $fname );
+ }
+
+ # A cross between insertArray and getArray, takes a condition array and a SET array
+ function updateArray( $table, $values, $conds, $fname = "Database::updateArray" )
+ {
+ $sql = "UPDATE '$table' SET " . $this->makeList( $values, LIST_SET );
+ $sql .= " WHERE " . $this->makeList( $conds, LIST_AND );
+ $this->query( $sql, $fname );
+ }
+
+ # Makes a wfStrencoded list from an array
+ # $mode: LIST_COMMA - comma separated, no field names
+ # LIST_AND - ANDed WHERE clause (without the WHERE)
+ # LIST_SET - comma separated with field names, like a SET clause
+ /* static */ function makeList( $a, $mode = LIST_COMMA )
+ {
+ $first = true;
+ $list = "";
+ foreach ( $a as $field => $value ) {
+ if ( !$first ) {
+ if ( $mode == LIST_AND ) {
+ $list .= " AND ";
+ } else {
+ $list .= ",";
+ }
+ } else {
+ $first = false;
+ }
+ if ( $mode == LIST_AND || $mode == LIST_SET ) {
+ $list .= "$field=";
+ }
+ if ( !is_numeric( $value ) ) {
+ $list .= "'" . wfStrencode( $value ) . "'";
+ } else {
+ $list .= $value;
+ }
+ }
+ return $list;
+ }
+
+ function startTimer( $timeout )
+ {
+ global $IP;
+ wfDebugDieBacktrace( "Database::startTimer() error : mysql_thread_id() not implemented for postgre" );
+ $tid = mysql_thread_id( $this->mConn );
+ exec( "php $IP/killthread.php $timeout $tid &>/dev/null &" );
+ }
+
+ function stopTimer()
+ {
+ }
+
+}
+
+#------------------------------------------------------------------------------
+# Global functions
+#------------------------------------------------------------------------------
+
+/* Standard fail function, called by default when a connection cannot be established
+ Displays the file cache if possible */
+function wfEmergencyAbort( &$conn ) {
+ global $wgTitle, $wgUseFileCache, $title, $wgInputEncoding, $wgSiteNotice, $wgOutputEncoding;
+
+ header( "Content-type: text/html; charset=$wgOutputEncoding" );
+ $msg = $wgSiteNotice;
+ if($msg == "") $msg = wfMsgNoDB( "noconnect" );
+ $text = $msg;
+
+ if($wgUseFileCache) {
+ if($wgTitle) {
+ $t =& $wgTitle;
+ } else {
+ if($title) {
+ $t = Title::newFromURL( $title );
+ } elseif (@$_REQUEST['search']) {
+ $search = $_REQUEST['search'];
+ echo wfMsgNoDB( "searchdisabled" );
+ echo wfMsgNoDB( "googlesearch", htmlspecialchars( $search ), $wgInputEncoding );
+ wfAbruptExit();
+ } else {
+ $t = Title::newFromText( wfMsgNoDB( "mainpage" ) );
+ }
+ }
+
+ $cache = new CacheManager( $t );
+ if( $cache->isFileCached() ) {
+ $msg = "<p style='color: red'><b>$msg<br />\n" .
+ wfMsgNoDB( "cachederror" ) . "</b></p>\n";
+
+ $tag = "<div id='article'>";
+ $text = str_replace(
+ $tag,
+ $tag . $msg,
+ $cache->fetchPageText() );
+ }
+ }
+
+ /* Don't cache error pages! They cause no end of trouble... */
+ header( "Cache-control: none" );
+ header( "Pragma: nocache" );
+ echo $text;
+ wfAbruptExit();
+}
+
+function wfStrencode( $s )
+{
+ return pg_escape_string( $s );
+}
+
+# Use PostgreSQL timestamp without timezone data type
+function wfTimestamp2Unix( $ts ) {
+ return gmmktime( ( (int)substr( $ts, 11, 2) ),
+ (int)substr( $ts, 14, 2 ), (int)substr( $ts, 17, 2 ),
+ (int)substr( $ts, 5, 2 ), (int)substr( $ts, 8, 2 ),
+ (int)substr( $ts, 0, 4 ) );
+}
+
+function wfUnix2Timestamp( $unixtime ) {
+ return gmdate( "Y-m-d H:i:s", $unixtime );
+}
+
+function wfTimestampNow() {
+ # return NOW
+ return gmdate( "Y-m-d H:i:s" );
+}
+
+# Sorting hack for MySQL 3, which doesn't use index sorts for DESC
+function wfInvertTimestamp( $ts ) {
+ $ts=preg_replace("/\D/","",$ts);
+ return strtr(
+ $ts,
+ "0123456789",
+ "9876543210"
+ );
+}
+
+function wfLimitResult( $limit, $offset ) {
+ return " LIMIT $limit ".(is_numeric($offset)?" OFFSET {$offset} ":"");
+}
+
+?>
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