<?php
-#
-# 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;
-#------------------------------------------------------------------------------
-# 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 ) { return wfSetRef( $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; }
+/**
+ * This is PostgreSQL database abstraction layer.
+ *
+ * As it includes more generic version for DB functions,
+ * than MySQL ones, some of them should be moved to parent
+ * Database class.
+ *
+ * STATUS: Working PG implementation of MediaWiki
+ * TODO: Installer support
+ *
+ * @package MediaWiki
+ */
+
+/**
+ * Depends on database
+ */
+require_once( 'Database.php' );
-#------------------------------------------------------------------------------
-# Other functions
-#------------------------------------------------------------------------------
+/**
+ *
+ * @package MediaWiki
+ */
+class DatabasePgsql extends Database {
+ var $mInsertId = NULL;
+ var $mLastResult = NULL;
- function Database()
+ function DatabasePgsql($server = false, $user = false, $password = false, $dbName = false,
+ $failFunction = false, $flags = 0, $tablePrefix = 'get from global' )
{
- global $wgOut;
- # Can't get a reference if it hasn't been set yet
- if ( !isset( $wgOut ) ) {
- $wgOut = NULL;
- }
- $this->mOut =& $wgOut;
-
+ Database::Database( $server, $user, $password, $dbName, $failFunction, $flags, $tablePrefix );
}
-
- /* static */ function newFromParams( $server, $user, $password, $dbName,
- $failFunction = false, $debug = false, $bufferResults = true, $ignoreErrors = false )
+
+ /* static */ function newFromParams( $server = false, $user = false, $password = false, $dbName = false,
+ $failFunction = false, $flags = 0, $tablePrefix = 'get from global' )
{
- $db = new Database;
- $db->mFailFunction = $failFunction;
- $db->mIgnoreErrors = $ignoreErrors;
- $db->mDebug = $debug;
- $db->mBufferResults = $bufferResults;
- $db->open( $server, $user, $password, $dbName );
- return $db;
+ return new DatabasePgsql( $server, $user, $password, $dbName, $failFunction, $flags, $tablePrefix );
}
-
- # Usually aborts on failure
- # If the failFunction is set to a non-zero integer, returns success
- function open( $server, $user, $password, $dbName )
- {
- global $wgEmergencyContact;
-
+
+ /**
+ * Usually aborts on failure
+ * If the failFunction is set to a non-zero integer, returns success
+ */
+ function open( $server, $user, $password, $dbName ) {
+ # Test for PostgreSQL support, to avoid suppressed fatal error
+ if ( !function_exists( 'pg_connect' ) ) {
+ die( "PostgreSQL functions missing, have you compiled PHP with the --with-pgsql option?\n" );
+ }
+
+ global $wgDBschema;
+
$this->close();
$this->mServer = $server;
$this->mUser = $user;
$this->mPassword = $password;
$this->mDBname = $dbName;
+ $this->mSchemas = array($wgDBschema,'public');
$success = false;
-
- if ( "" != $dbName ) {
+ if ( '' != $dbName ) {
# start a database connection
- @$this->mConn = pg_connect("host=$server dbname=$dbName user=$user password=$password");
+ $hstring="";
+ if ($server!=false && $server!="") {
+ $hstring="host=$server ";
+ }
+ @$this->mConn = pg_connect("$hstring 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" );
+ } else {
+ $this->setSchema();
+ $this->mOpened = true;
}
}
return $this->mConn;
}
- # Closes a database connection, if it is open
- # Returns success, true if already closed
- function close()
- {
+ /**
+ * 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 );
}
}
- /* private */ function reportConnectionError( $msg = "")
- {
- if ( $this->mFailFunction ) {
- if ( !is_int( $this->mFailFunction ) ) {
- $this->$mFailFunction( $this );
- }
- } else {
- wfEmergencyAbort( $this );
- }
+ function doQuery( $sql ) {
+ return $this->mLastResult=pg_query( $this->mConn , $sql);
}
-
- # 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" );
- }
- if( $this->mBufferResults ) {
- $ret = pg_query( $this->mConn , $sql);
- } else {
- // TODO FIXME : php doesnt get a postgre unbuffered query
- // $ret = mysql_unbuffered_query( $sql, $this->mConn );
- // I(hashar) am assuming that pg_send_query does the same
- $ret = pg_send_query( $this->mConn , $sql);
- }
-
- if ( false === $ret ) {
- $error = pg_result_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 queryIgnore( $sql, $fname = '' ) {
+ return $this->query( $sql, $fname, true );
}
function freeResult( $res ) {
wfDebugDieBacktrace( "Unable to free PostgreSQL result\n" );
}
}
+
function fetchObject( $res ) {
@$row = pg_fetch_object( $res );
# FIXME: HACK HACK HACK HACK debug
# TODO:
# hashar : not sure if the following test really trigger if the object
# fetching failled.
- if( pg_result_error($this->mConn) ) {
- wfDebugDieBacktrace( "SQL error: " . htmlspecialchars( pg_result_error($this->mConn) ) );
+ if( pg_last_error($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( $res );
- if( pg_result_error($this->mConn) ) {
- wfDebugDieBacktrace( "SQL error: " . htmlspecialchars( pg_result_error($this->mConn) );
+ if( pg_last_error($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
+
+ /**
+ * This must be called after nextSequenceVal
+ */
function insertId() {
- //return mysql_insert_id( $this->mConn );
- wfDebugDieBacktrace( "Database::insertId() error : not implemented for postgre" );
+ return $this->mInsertId;
}
+
function dataSeek( $res, $row ) { return pg_result_seek( $res, $row ); }
- function lastErrno() { return $this->lastError(); }
- function lastError() { return pg_result_error(); }
- function affectedRows() { return pg_affected_rows( $this->mConn ); }
-
- # 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" )
- {
- $sql = "SELECT '$var' FROM '$table' WHERE ($cond)";
- $result = $this->query( $sql, DB_READ, $fname );
-
- $ret = "";
- if ( pg_num_rows( $result ) > 0 ) {
- $s = pg_fetch_object( $result );
- $ret = $s->$var;
- pg_free_result( $result );
- }
- return $ret;
+ function lastError() { return pg_last_error(); }
+ function lastErrno() { return 1; }
+
+ function affectedRows() {
+ return pg_affected_rows( $this->mLastResult );
}
- # 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";
+ /**
+ * Returns information about an index
+ * If errors are explicitly ignored, returns NULL on failure
+ */
+ function indexInfo( $table, $index, $fname = 'Database::indexExists' ) {
+ $sql = "SELECT indexname FROM pg_indexes WHERE tablename='$table'";
$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" )
- {
- # 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
- // FIXME: hashar : probably need investigation here
- $sql = "SELECT 'INDEX' FROM '$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 $row;
}
}
- return $found;
+ return false;
}
-
- 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( $res );
+
+ function indexUnique ($table, $index, $fname = 'Database::indexUnique' ) {
+ $sql = "SELECT indexname FROM pg_indexes WHERE tablename='{$table}'".
+ " AND indexdef LIKE 'CREATE UNIQUE%({$index})'";
+ $res = $this->query( $sql, $fname );
+ if ( !$res )
+ return NULL;
+ while ($row = $this->fetchObject( $res ))
return true;
- } else {
- return false;
- }
+ return false;
+
}
- function fieldInfo( $table, $field )
- {
+ function fieldInfo( $table, $field ) {
+ wfDebugDieBacktrace( 'Database::fieldInfo() error : mysql_fetch_field() not implemented for postgre' );
+ /*
$res = $this->query( "SELECT * FROM '$table' LIMIT 1" );
$n = pg_num_fields( $res );
for( $i = 0; $i < $n; $i++ ) {
return $meta;
}
}
- return false;
+ 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;
+ function insert( $table, $a, $fname = 'Database::insert', $options = array() ) {
+ # PostgreSQL doesn't support options
+ # We have a go at faking one of them
+ # TODO: DELAYED, LOW_PRIORITY
+
+ if ( !is_array($options))
+ $options = array($options);
+
+ if ( in_array( 'IGNORE', $options ) )
+ $oldIgnore = $this->ignoreErrors( true );
+
+ # IGNORE is performed using single-row inserts, ignoring errors in each
+ # FIXME: need some way to distiguish between key collision and other types of error
+ $oldIgnore = $this->ignoreErrors( true );
+ if ( !is_array( reset( $a ) ) ) {
+ $a = array( $a );
}
- $sql = "$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;
- }
+ foreach ( $a as $row ) {
+ parent::insert( $table, $row, $fname, array() );
}
- return $list;
+ $this->ignoreErrors( $oldIgnore );
+ $retVal = true;
+
+ if ( in_array( 'IGNORE', $options ) )
+ $this->ignoreErrors( $oldIgnore );
+
+ return $retVal;
}
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 $tid &>/dev/null &" );
+ wfDebugDieBacktrace( 'Database::startTimer() error : mysql_thread_id() not implemented for postgre' );
+ /*$tid = mysql_thread_id( $this->mConn );
+ exec( "php $IP/killthread.php $timeout $tid &>/dev/null &" );*/
}
- function stopTimer()
- {
+ function tableName( $name ) {
+ # First run any transformations from the parent object
+ $name = parent::tableName( $name );
+
+ # Replace backticks into double quotes
+ $name = strtr($name,'`','"');
+
+ # Now quote PG reserved keywords
+ switch( $name ) {
+ case 'user':
+ case 'old':
+ case 'group':
+ return '"' . $name . '"';
+
+ default:
+ return $name;
+ }
}
-}
+ function strencode( $s ) {
+ return pg_escape_string( $s );
+ }
-#------------------------------------------------------------------------------
-# Global functions
-#------------------------------------------------------------------------------
+ /**
+ * Return the next in a sequence, save the value for retrieval via insertId()
+ */
+ function nextSequenceValue( $seqName ) {
+ $value = $this->selectField(''," nextval('" . $seqName . "')");
+ $this->mInsertId = $value;
+ return $value;
+ }
-/* Standard fail function, called by default when a connection cannot be established
- Displays the file cache if possible */
-function wfEmergencyAbort( &$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" ) );
+ /**
+ * USE INDEX clause
+ * PostgreSQL doesn't have them and returns ""
+ */
+ function useIndexClause( $index ) {
+ return '';
+ }
+
+ # 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
+ function replace( $table, $uniqueIndexes, $rows, $fname = 'Database::replace' ) {
+ $table = $this->tableName( $table );
+
+ if (count($rows)==0) {
+ return;
+ }
+
+ # Single row case
+ if ( !is_array( reset( $rows ) ) ) {
+ $rows = array( $rows );
+ }
+
+ foreach( $rows as $row ) {
+ # Delete rows which collide
+ if ( $uniqueIndexes ) {
+ $sql = "DELETE FROM $table WHERE ";
+ $first = true;
+ foreach ( $uniqueIndexes as $index ) {
+ if ( $first ) {
+ $first = false;
+ $sql .= "(";
+ } else {
+ $sql .= ') OR (';
+ }
+ if ( is_array( $index ) ) {
+ $first2 = true;
+ foreach ( $index as $col ) {
+ if ( $first2 ) {
+ $first2 = false;
+ } else {
+ $sql .= ' AND ';
+ }
+ $sql .= $col.'=' . $this->addQuotes( $row[$col] );
+ }
+ } else {
+ $sql .= $index.'=' . $this->addQuotes( $row[$index] );
+ }
+ }
+ $sql .= ')';
+ $this->query( $sql, $fname );
}
+
+ # Now insert the row
+ $sql = "INSERT INTO $table (" . $this->makeList( array_keys( $row ), LIST_NAMES ) .') VALUES (' .
+ $this->makeList( $row, LIST_COMMA ) . ')';
+ $this->query( $sql, $fname );
}
+ }
- $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() );
+ # DELETE where the condition is a join
+ function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = "Database::deleteJoin" ) {
+ if ( !$conds ) {
+ wfDebugDieBacktrace( 'Database::deleteJoin() called with empty $conds' );
+ }
+
+ $delTable = $this->tableName( $delTable );
+ $joinTable = $this->tableName( $joinTable );
+ $sql = "DELETE FROM $delTable WHERE $delVar IN (SELECT $joinVar FROM $joinTable ";
+ if ( $conds != '*' ) {
+ $sql .= 'WHERE ' . $this->makeList( $conds, LIST_AND );
+ }
+ $sql .= ')';
+
+ $this->query( $sql, $fname );
+ }
+
+ # Returns the size of a text field, or -1 for "unlimited"
+ function textFieldSize( $table, $field ) {
+ $table = $this->tableName( $table );
+ $sql = "SELECT t.typname as ftype,a.atttypmod as size
+ FROM pg_class c, pg_attribute a, pg_type t
+ WHERE relname='$table' AND a.attrelid=c.oid AND
+ a.atttypid=t.oid and a.attname='$field'";
+ $res =$this->query($sql);
+ $row=$this->fetchObject($res);
+ if ($row->ftype=="varchar") {
+ $size=$row->size-4;
+ } else {
+ $size=$row->size;
}
+ $this->freeResult( $res );
+ return $size;
}
- /* Don't cache error pages! They cause no end of trouble... */
- header( "Cache-control: none" );
- header( "Pragma: nocache" );
- echo $text;
- wfAbruptExit();
-}
+ function lowPriorityOption() {
+ return '';
+ }
-function wfStrencode( $s )
-{
- return addslashes( $s );
-}
+ function limitResult($limit,$offset) {
+ return " LIMIT $limit ".(is_numeric($offset)?" OFFSET {$offset} ":"");
+ }
+
+ /**
+ * Returns an SQL expression for a simple conditional.
+ * Uses CASE on PostgreSQL.
+ *
+ * @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 " (CASE WHEN $cond THEN $trueVal ELSE $falseVal END) ";
+ }
-# Ideally we'd be using actual time fields in the db
-function wfTimestamp2Unix( $ts ) {
- return gmmktime( ( (int)substr( $ts, 8, 2) ),
- (int)substr( $ts, 10, 2 ), (int)substr( $ts, 12, 2 ),
- (int)substr( $ts, 4, 2 ), (int)substr( $ts, 6, 2 ),
- (int)substr( $ts, 0, 4 ) );
-}
+ # FIXME: actually detecting deadlocks might be nice
+ function wasDeadlock() {
+ return false;
+ }
-function wfUnix2Timestamp( $unixtime ) {
- return gmdate( "YmdHis", $unixtime );
-}
+ # Return DB-style timestamp used for MySQL schema
+ function timestamp( $ts=0 ) {
+ return wfTimestamp(TS_DB,$ts);
+ }
+
+ /**
+ * Return aggregated value function call
+ */
+ function aggregateValue ($valuedata,$valuename='value') {
+ return $valuedata;
+ }
-function wfTimestampNow() {
- # return NOW
- return gmdate( "YmdHis" );
+
+ function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
+ $message = "A database error has occurred\n" .
+ "Query: $sql\n" .
+ "Function: $fname\n" .
+ "Error: $errno $error\n";
+ wfDebugDieBacktrace($message);
+ }
+
+ /**
+ * @return string wikitext of a link to the server software's web site
+ */
+ function getSoftwareLink() {
+ return "[http://www.postgresql.org/ PostgreSQL]";
+ }
+
+ /**
+ * @return string Version information from the database
+ */
+ function getServerVersion() {
+ $res = $this->query( "SELECT version()" );
+ $row = $this->fetchRow( $res );
+ $version = $row[0];
+ $this->freeResult( $res );
+ return $version;
+ }
+
+ function setSchema($schema=false) {
+ $schemas=$this->mSchemas;
+ if ($schema) { array_unshift($schemas,$schema); }
+ $searchpath=$this->makeList($schemas,LIST_NAMES);
+ $this->query("SET search_path = $searchpath");
+ }
}
-# Sorting hack for MySQL 3, which doesn't use index sorts for DESC
-function wfInvertTimestamp( $ts ) {
- return strtr(
- $ts,
- "0123456789",
- "9876543210"
- );
+/**
+ * Just an alias.
+ * @package MediaWiki
+ */
+class DatabasePostgreSQL extends DatabasePgsql {
}
+
?>
dépôts / lhc / web / wiklou.git / blobdiff