<?php
/**
- * This is PostgreSQL database abstraction layer.
+ * This is the Postgres 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.
*
- * @package MediaWiki
+ * @addtogroup Database
*/
+class PostgresField {
+ private $name, $tablename, $type, $nullable, $max_length;
+
+ static function fromText($db, $table, $field) {
+ global $wgDBmwschema;
+
+ $q = <<<END
+SELECT
+CASE WHEN typname = 'int2' THEN 'smallint'
+WHEN typname = 'int4' THEN 'integer'
+WHEN typname = 'int8' THEN 'bigint'
+WHEN typname = 'bpchar' THEN 'char'
+ELSE typname END AS typname,
+attnotnull, attlen
+FROM pg_class, pg_namespace, pg_attribute, pg_type
+WHERE relnamespace=pg_namespace.oid
+AND relkind='r'
+AND attrelid=pg_class.oid
+AND atttypid=pg_type.oid
+AND nspname=%s
+AND relname=%s
+AND attname=%s;
+END;
+ $res = $db->query(sprintf($q,
+ $db->addQuotes($wgDBmwschema),
+ $db->addQuotes($table),
+ $db->addQuotes($field)));
+ $row = $db->fetchObject($res);
+ if (!$row)
+ return null;
+ $n = new PostgresField;
+ $n->type = $row->typname;
+ $n->nullable = ($row->attnotnull == 'f');
+ $n->name = $field;
+ $n->tablename = $table;
+ $n->max_length = $row->attlen;
+ return $n;
+ }
+
+ function name() {
+ return $this->name;
+ }
+
+ function tableName() {
+ return $this->tablename;
+ }
+
+ function type() {
+ return $this->type;
+ }
+
+ function nullable() {
+ return $this->nullable;
+ }
+
+ function maxLength() {
+ return $this->max_length;
+ }
+}
/**
- * Depends on database
+ * @addtogroup Database
*/
-require_once( 'Database.php' );
-
class DatabasePostgres extends Database {
var $mInsertId = NULL;
var $mLastResult = NULL;
+ var $numeric_version = NULL;
- function DatabasePostgres($server = false, $port = false, $user = false, $password = false, $dbName = false,
+ function DatabasePostgres($server = false, $user = false, $password = false, $dbName = false,
$failFunction = false, $flags = 0 )
{
- Database::__construct( $server, $port, $user, $password, $dbName, $failFunction, $flags );
+
+ global $wgOut;
+ # Can't get a reference if it hasn't been set yet
+ if ( !isset( $wgOut ) ) {
+ $wgOut = NULL;
+ }
+ $this->mOut =& $wgOut;
+ $this->mFailFunction = $failFunction;
+ $this->mFlags = $flags;
+ $this->open( $server, $user, $password, $dbName);
+
}
- static function newFromParams( $server = false, $port = false, $user = false, $password = false, $dbName = false,
- $failFunction = false, $flags = 0)
+ function cascadingDeletes() {
+ return true;
+ }
+ function cleanupTriggers() {
+ return true;
+ }
+ function strictIPs() {
+ return true;
+ }
+ function realTimestamps() {
+ return true;
+ }
+ function implicitGroupby() {
+ return false;
+ }
+ function implicitOrderby() {
+ return false;
+ }
+ function searchableIPs() {
+ return true;
+ }
+ function functionalIndexes() {
+ return true;
+ }
+
+ function hasConstraint( $name ) {
+ $SQL = "SELECT 1 FROM pg_catalog.pg_constraint WHERE conname = '" . pg_escape_string( $name ) . "'";
+ return $this->numRows($res = $this->doQuery($SQL));
+ }
+
+ static function newFromParams( $server, $user, $password, $dbName, $failFunction = false, $flags = 0)
{
- return new DatabasePostgres( $server, $port, $user, $password, $dbName, $failFunction, $flags );
+ return new DatabasePostgres( $server, $user, $password, $dbName, $failFunction, $flags );
}
/**
* Usually aborts on failure
* If the failFunction is set to a non-zero integer, returns success
*/
- function open( $server, $port, $user, $password, $dbName ) {
-
- # Test for PostgreSQL support, to avoid suppressed fatal error
+ function open( $server, $user, $password, $dbName ) {
+ # Test for Postgres support, to avoid suppressed fatal error
if ( !function_exists( 'pg_connect' ) ) {
- throw new DBConnectionError( $this, "PostgreSQL functions missing, have you compiled PHP with the --with-pgsql option?\n" );
+ throw new DBConnectionError( $this, "Postgres functions missing, have you compiled PHP with the --with-pgsql option?\n (Note: if you recently installed PHP, you may need to restart your webserver and database)\n" );
}
- global $wgDBschema;
+ global $wgDBport;
+
+ if (!strlen($user)) { ## e.g. the class is being loaded
+ return;
+ }
$this->close();
$this->mServer = $server;
+ $this->mPort = $port = $wgDBport;
$this->mUser = $user;
$this->mPassword = $password;
$this->mDBname = $dbName;
- $this->mSchemas = array($wgDBschema,'public');
- $this->mPort = $port;
- $success = false;
+ $hstring="";
+ if ($server!=false && $server!="") {
+ $hstring="host=$server ";
+ }
+ if ($port!=false && $port!="") {
+ $hstring .= "port=$port ";
+ }
- if ( '' != $dbName ) {
- # start a database connection
- $hstring="";
- if ($server!=false && $server!="") {
- $hstring="host=$server ";
- }
- if ($port!=false && $port != '') {
- $hstring .= "port=$port ";
- }
+ error_reporting( E_ALL );
+ @$this->mConn = pg_connect("$hstring dbname=$dbName user=$user password=$password");
- @$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;
- }
+ 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 false;
+ }
+
+ $this->mOpened = true;
+
+ global $wgCommandLineMode;
+ ## If called from the command-line (e.g. importDump), only show errors
+ if ($wgCommandLineMode) {
+ $this->doQuery("SET client_min_messages = 'ERROR'");
+ }
+
+ global $wgDBmwschema, $wgDBts2schema;
+ if (isset( $wgDBmwschema ) && isset( $wgDBts2schema )
+ && $wgDBmwschema !== 'mediawiki'
+ && preg_match( '/^\w+$/', $wgDBmwschema )
+ && preg_match( '/^\w+$/', $wgDBts2schema )
+ ) {
+ $safeschema = $this->quote_ident($wgDBmwschema);
+ $safeschema2 = $this->quote_ident($wgDBts2schema);
+ $this->doQuery("SET search_path = $safeschema, $wgDBts2schema, public");
}
+
return $this->mConn;
}
+
+ function initial_setup($password, $dbName) {
+ ## If this is the initial connection, setup the schema stuff and possibly create the user
+ global $wgDBname, $wgDBuser, $wgDBpassword, $wgDBsuperuser, $wgDBmwschema,
+ $wgDBts2schema;
+
+ print "<li>Checking the version of Postgres...";
+ $version = $this->getServerVersion();
+ $PGMINVER = "8.1";
+ if ($this->numeric_version < $PGMINVER) {
+ print "<b>FAILED</b>. Required version is $PGMINVER. You have $this->numeric_version ($version)</li>\n";
+ dieout("</ul>");
+ }
+ print "version $this->numeric_version is OK.</li>\n";
+
+ $safeuser = $this->quote_ident($wgDBuser);
+ ## Are we connecting as a superuser for the first time?
+ if ($wgDBsuperuser) {
+ ## Are we really a superuser? Check out our rights
+ $SQL = "SELECT
+ CASE WHEN usesuper IS TRUE THEN
+ CASE WHEN usecreatedb IS TRUE THEN 3 ELSE 1 END
+ ELSE CASE WHEN usecreatedb IS TRUE THEN 2 ELSE 0 END
+ END AS rights
+ FROM pg_catalog.pg_user WHERE usename = " . $this->addQuotes($wgDBsuperuser);
+ $rows = $this->numRows($res = $this->doQuery($SQL));
+ if (!$rows) {
+ print "<li>ERROR: Could not read permissions for user \"$wgDBsuperuser\"</li>\n";
+ dieout('</ul>');
+ }
+ $perms = pg_fetch_result($res, 0, 0);
+
+ $SQL = "SELECT 1 FROM pg_catalog.pg_user WHERE usename = " . $this->addQuotes($wgDBuser);
+ $rows = $this->numRows($this->doQuery($SQL));
+ if ($rows) {
+ print "<li>User \"$wgDBuser\" already exists, skipping account creation.</li>";
+ }
+ else {
+ if ($perms != 1 and $perms != 3) {
+ print "<li>ERROR: the user \"$wgDBsuperuser\" cannot create other users. ";
+ print 'Please use a different Postgres user.</li>';
+ dieout('</ul>');
+ }
+ print "<li>Creating user <b>$wgDBuser</b>...";
+ $safepass = $this->addQuotes($wgDBpassword);
+ $SQL = "CREATE USER $safeuser NOCREATEDB PASSWORD $safepass";
+ $this->doQuery($SQL);
+ print "OK</li>\n";
+ }
+ ## User now exists, check out the database
+ if ($dbName != $wgDBname) {
+ $SQL = "SELECT 1 FROM pg_catalog.pg_database WHERE datname = " . $this->addQuotes($wgDBname);
+ $rows = $this->numRows($this->doQuery($SQL));
+ if ($rows) {
+ print "<li>Database \"$wgDBname\" already exists, skipping database creation.</li>";
+ }
+ else {
+ if ($perms < 2) {
+ print "<li>ERROR: the user \"$wgDBsuperuser\" cannot create databases. ";
+ print 'Please use a different Postgres user.</li>';
+ dieout('</ul>');
+ }
+ print "<li>Creating database <b>$wgDBname</b>...";
+ $safename = $this->quote_ident($wgDBname);
+ $SQL = "CREATE DATABASE $safename OWNER $safeuser ";
+ $this->doQuery($SQL);
+ print "OK</li>\n";
+ ## Hopefully tsearch2 and plpgsql are in template1...
+ }
+
+ ## Reconnect to check out tsearch2 rights for this user
+ print "<li>Connecting to \"$wgDBname\" as superuser \"$wgDBsuperuser\" to check rights...";
+
+ $hstring="";
+ if ($this->mServer!=false && $this->mServer!="") {
+ $hstring="host=$this->mServer ";
+ }
+ if ($this->mPort!=false && $this->mPort!="") {
+ $hstring .= "port=$this->mPort ";
+ }
+
+ @$this->mConn = pg_connect("$hstring dbname=$wgDBname user=$wgDBsuperuser password=$password");
+ if ( $this->mConn == false ) {
+ print "<b>FAILED TO CONNECT!</b></li>";
+ dieout("</ul>");
+ }
+ print "OK</li>\n";
+ }
+
+ ## Tsearch2 checks
+ print "<li>Checking that tsearch2 is installed in the database \"$wgDBname\"...";
+ if (! $this->tableExists("pg_ts_cfg", $wgDBts2schema)) {
+ print "<b>FAILED</b>. tsearch2 must be installed in the database \"$wgDBname\".";
+ print "Please see <a href='http://www.devx.com/opensource/Article/21674/0/page/2'>this article</a>";
+ print " for instructions or ask on #postgresql on irc.freenode.net</li>\n";
+ dieout("</ul>");
+ }
+ print "OK</li>\n";
+ print "<li>Ensuring that user \"$wgDBuser\" has select rights on the tsearch2 tables...";
+ foreach (array('cfg','cfgmap','dict','parser') as $table) {
+ $SQL = "GRANT SELECT ON pg_ts_$table TO $safeuser";
+ $this->doQuery($SQL);
+ }
+ print "OK</li>\n";
+
+
+ ## Setup the schema for this user if needed
+ $result = $this->schemaExists($wgDBmwschema);
+ $safeschema = $this->quote_ident($wgDBmwschema);
+ if (!$result) {
+ print "<li>Creating schema <b>$wgDBmwschema</b> ...";
+ $result = $this->doQuery("CREATE SCHEMA $safeschema AUTHORIZATION $safeuser");
+ if (!$result) {
+ print "<b>FAILED</b>.</li>\n";
+ dieout("</ul>");
+ }
+ print "OK</li>\n";
+ }
+ else {
+ print "<li>Schema already exists, explicitly granting rights...\n";
+ $safeschema2 = $this->addQuotes($wgDBmwschema);
+ $SQL = "SELECT 'GRANT ALL ON '||pg_catalog.quote_ident(relname)||' TO $safeuser;'\n".
+ "FROM pg_catalog.pg_class p, pg_catalog.pg_namespace n\n".
+ "WHERE relnamespace = n.oid AND n.nspname = $safeschema2\n".
+ "AND p.relkind IN ('r','S','v')\n";
+ $SQL .= "UNION\n";
+ $SQL .= "SELECT 'GRANT ALL ON FUNCTION '||pg_catalog.quote_ident(proname)||'('||\n".
+ "pg_catalog.oidvectortypes(p.proargtypes)||') TO $safeuser;'\n".
+ "FROM pg_catalog.pg_proc p, pg_catalog.pg_namespace n\n".
+ "WHERE p.pronamespace = n.oid AND n.nspname = $safeschema2";
+ $res = $this->doQuery($SQL);
+ if (!$res) {
+ print "<b>FAILED</b>. Could not set rights for the user.</li>\n";
+ dieout("</ul>");
+ }
+ $this->doQuery("SET search_path = $safeschema");
+ $rows = $this->numRows($res);
+ while ($rows) {
+ $rows--;
+ $this->doQuery(pg_fetch_result($res, $rows, 0));
+ }
+ print "OK</li>";
+ }
+
+ $wgDBsuperuser = '';
+ return true; // Reconnect as regular user
+
+ } // end superuser
+
+ if (!defined('POSTGRES_SEARCHPATH')) {
+
+ ## Do we have the basic tsearch2 table?
+ print "<li>Checking for tsearch2 in the schema \"$wgDBts2schema\"...";
+ if (! $this->tableExists("pg_ts_dict", $wgDBts2schema)) {
+ print "<b>FAILED</b>. Make sure tsearch2 is installed. See <a href=";
+ print "'http://www.devx.com/opensource/Article/21674/0/page/2'>this article</a>";
+ print " for instructions.</li>\n";
+ dieout("</ul>");
+ }
+ print "OK</li>\n";
+
+ ## Does this user have the rights to the tsearch2 tables?
+ $ctype = pg_fetch_result($this->doQuery("SHOW lc_ctype"),0,0);
+ print "<li>Checking tsearch2 permissions...";
+ ## Let's check all four, just to be safe
+ error_reporting( 0 );
+ $ts2tables = array('cfg','cfgmap','dict','parser');
+ $safetsschema = $this->quote_ident($wgDBts2schema);
+ foreach ( $ts2tables AS $tname ) {
+ $SQL = "SELECT count(*) FROM $safetsschema.pg_ts_$tname";
+ $res = $this->doQuery($SQL);
+ if (!$res) {
+ print "<b>FAILED</b> to access pg_ts_$tname. Make sure that the user ".
+ "\"$wgDBuser\" has SELECT access to all four tsearch2 tables</li>\n";
+ dieout("</ul>");
+ }
+ }
+ $SQL = "SELECT ts_name FROM $safetsschema.pg_ts_cfg WHERE locale = '$ctype'";
+ $SQL .= " ORDER BY CASE WHEN ts_name <> 'default' THEN 1 ELSE 0 END";
+ $res = $this->doQuery($SQL);
+ error_reporting( E_ALL );
+ if (!$res) {
+ print "<b>FAILED</b>. Could not determine the tsearch2 locale information</li>\n";
+ dieout("</ul>");
+ }
+ print "OK</li>";
+
+ ## Will the current locale work? Can we force it to?
+ print "<li>Verifying tsearch2 locale with $ctype...";
+ $rows = $this->numRows($res);
+ $resetlocale = 0;
+ if (!$rows) {
+ print "<b>not found</b></li>\n";
+ print "<li>Attempting to set default tsearch2 locale to \"$ctype\"...";
+ $resetlocale = 1;
+ }
+ else {
+ $tsname = pg_fetch_result($res, 0, 0);
+ if ($tsname != 'default') {
+ print "<b>not set to default ($tsname)</b>";
+ print "<li>Attempting to change tsearch2 default locale to \"$ctype\"...";
+ $resetlocale = 1;
+ }
+ }
+ if ($resetlocale) {
+ $SQL = "UPDATE $safetsschema.pg_ts_cfg SET locale = '$ctype' WHERE ts_name = 'default'";
+ $res = $this->doQuery($SQL);
+ if (!$res) {
+ print "<b>FAILED</b>. ";
+ print "Please make sure that the locale in pg_ts_cfg for \"default\" is set to \"$ctype\"</li>\n";
+ dieout("</ul>");
+ }
+ print "OK</li>";
+ }
+
+ ## Final test: try out a simple tsearch2 query
+ $SQL = "SELECT $safetsschema.to_tsvector('default','MediaWiki tsearch2 testing')";
+ $res = $this->doQuery($SQL);
+ if (!$res) {
+ print "<b>FAILED</b>. Specifically, \"$SQL\" did not work.</li>";
+ dieout("</ul>");
+ }
+ print "OK</li>";
+
+ ## Do we have plpgsql installed?
+ print "<li>Checking for Pl/Pgsql ...";
+ $SQL = "SELECT 1 FROM pg_catalog.pg_language WHERE lanname = 'plpgsql'";
+ $rows = $this->numRows($this->doQuery($SQL));
+ if ($rows < 1) {
+ // plpgsql is not installed, but if we have a pg_pltemplate table, we should be able to create it
+ print "not installed. Attempting to install Pl/Pgsql ...";
+ $SQL = "SELECT 1 FROM pg_catalog.pg_class c JOIN pg_catalog.pg_namespace n ON (n.oid = c.relnamespace) ".
+ "WHERE relname = 'pg_pltemplate' AND nspname='pg_catalog'";
+ $rows = $this->numRows($this->doQuery($SQL));
+ if ($rows >= 1) {
+ $olde = error_reporting(0);
+ error_reporting($olde - E_WARNING);
+ $result = $this->doQuery("CREATE LANGUAGE plpgsql");
+ error_reporting($olde);
+ if (!$result) {
+ print "<b>FAILED</b>. You need to install the language plpgsql in the database <tt>$wgDBname</tt></li>";
+ dieout("</ul>");
+ }
+ }
+ else {
+ print "<b>FAILED</b>. You need to install the language plpgsql in the database <tt>$wgDBname</tt></li>";
+ dieout("</ul>");
+ }
+ }
+ print "OK</li>\n";
+
+ ## Does the schema already exist? Who owns it?
+ $result = $this->schemaExists($wgDBmwschema);
+ if (!$result) {
+ print "<li>Creating schema <b>$wgDBmwschema</b> ...";
+ error_reporting( 0 );
+ $safeschema = $this->quote_ident($wgDBmwschema);
+ $result = $this->doQuery("CREATE SCHEMA $safeschema");
+ error_reporting( E_ALL );
+ if (!$result) {
+ print "<b>FAILED</b>. The user \"$wgDBuser\" must be able to access the schema. ".
+ "You can try making them the owner of the database, or try creating the schema with a ".
+ "different user, and then grant access to the \"$wgDBuser\" user.</li>\n";
+ dieout("</ul>");
+ }
+ print "OK</li>\n";
+ }
+ else if ($result != $wgDBuser) {
+ print "<li>Schema \"$wgDBmwschema\" exists but is not owned by \"$wgDBuser\". Not ideal.</li>\n";
+ }
+ else {
+ print "<li>Schema \"$wgDBmwschema\" exists and is owned by \"$wgDBuser\". Excellent.</li>\n";
+ }
+
+ ## Always return GMT time to accomodate the existing integer-based timestamp assumption
+ print "<li>Setting the timezone to GMT for user \"$wgDBuser\" ...";
+ $SQL = "ALTER USER $safeuser SET timezone = 'GMT'";
+ $result = pg_query($this->mConn, $SQL);
+ if (!$result) {
+ print "<b>FAILED</b>.</li>\n";
+ dieout("</ul>");
+ }
+ print "OK</li>\n";
+ ## Set for the rest of this session
+ $SQL = "SET timezone = 'GMT'";
+ $result = pg_query($this->mConn, $SQL);
+ if (!$result) {
+ print "<li>Failed to set timezone</li>\n";
+ dieout("</ul>");
+ }
+
+ print "<li>Setting the datestyle to ISO, YMD for user \"$wgDBuser\" ...";
+ $SQL = "ALTER USER $safeuser SET datestyle = 'ISO, YMD'";
+ $result = pg_query($this->mConn, $SQL);
+ if (!$result) {
+ print "<b>FAILED</b>.</li>\n";
+ dieout("</ul>");
+ }
+ print "OK</li>\n";
+ ## Set for the rest of this session
+ $SQL = "SET datestyle = 'ISO, YMD'";
+ $result = pg_query($this->mConn, $SQL);
+ if (!$result) {
+ print "<li>Failed to set datestyle</li>\n";
+ dieout("</ul>");
+ }
+
+ ## Fix up the search paths if needed
+ print "<li>Setting the search path for user \"$wgDBuser\" ...";
+ $path = $this->quote_ident($wgDBmwschema);
+ if ($wgDBts2schema !== $wgDBmwschema)
+ $path .= ", ". $this->quote_ident($wgDBts2schema);
+ if ($wgDBmwschema !== 'public' and $wgDBts2schema !== 'public')
+ $path .= ", public";
+ $SQL = "ALTER USER $safeuser SET search_path = $path";
+ $result = pg_query($this->mConn, $SQL);
+ if (!$result) {
+ print "<b>FAILED</b>.</li>\n";
+ dieout("</ul>");
+ }
+ print "OK</li>\n";
+ ## Set for the rest of this session
+ $SQL = "SET search_path = $path";
+ $result = pg_query($this->mConn, $SQL);
+ if (!$result) {
+ print "<li>Failed to set search_path</li>\n";
+ dieout("</ul>");
+ }
+ define( "POSTGRES_SEARCHPATH", $path );
+ }
+ }
+
+
/**
* Closes a database connection, if it is open
* Returns success, true if already closed
}
function doQuery( $sql ) {
+ if (function_exists('mb_convert_encoding')) {
+ return $this->mLastResult=pg_query( $this->mConn , mb_convert_encoding($sql,'UTF-8') );
+ }
return $this->mLastResult=pg_query( $this->mConn , $sql);
}
}
function freeResult( $res ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
if ( !@pg_free_result( $res ) ) {
- throw new DBUnexpectedError($this, "Unable to free PostgreSQL result\n" );
+ throw new DBUnexpectedError($this, "Unable to free Postgres result\n" );
}
}
function fetchObject( $res ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
@$row = pg_fetch_object( $res );
# FIXME: HACK HACK HACK HACK debug
# TODO:
# hashar : not sure if the following test really trigger if the object
- # fetching failled.
+ # fetching failed.
if( pg_last_error($this->mConn) ) {
throw new DBUnexpectedError($this, 'SQL error: ' . htmlspecialchars( pg_last_error($this->mConn) ) );
}
}
function fetchRow( $res ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
@$row = pg_fetch_array( $res );
if( pg_last_error($this->mConn) ) {
throw new DBUnexpectedError($this, 'SQL error: ' . htmlspecialchars( pg_last_error($this->mConn) ) );
}
function numRows( $res ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
@$n = pg_num_rows( $res );
if( pg_last_error($this->mConn) ) {
throw new DBUnexpectedError($this, 'SQL error: ' . htmlspecialchars( pg_last_error($this->mConn) ) );
}
return $n;
}
- function numFields( $res ) { return pg_num_fields( $res ); }
- function fieldName( $res, $n ) { return pg_field_name( $res, $n ); }
+ function numFields( $res ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
+ return pg_num_fields( $res );
+ }
+ function fieldName( $res, $n ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
+ return pg_field_name( $res, $n );
+ }
/**
* This must be called after nextSequenceVal
return $this->mInsertId;
}
- function dataSeek( $res, $row ) { return pg_result_seek( $res, $row ); }
+ function dataSeek( $res, $row ) {
+ if ( $res instanceof ResultWrapper ) {
+ $res = $res->result;
+ }
+ return pg_result_seek( $res, $row );
+ }
+
function lastError() {
if ( $this->mConn ) {
return pg_last_error();
return "No database connection";
}
}
- function lastErrno() { return 1; }
+ function lastErrno() {
+ return pg_last_error() ? 1 : 0;
+ }
function affectedRows() {
+ if( !isset( $this->mLastResult ) or ! $this->mLastResult )
+ return 0;
+
return pg_affected_rows( $this->mLastResult );
}
+ /**
+ * Estimate rows in dataset
+ * Returns estimated count, based on EXPLAIN output
+ * This is not necessarily an accurate estimate, so use sparingly
+ * Returns -1 if count cannot be found
+ * 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 );
+ $rows = -1;
+ if ( $res ) {
+ $row = $this->fetchRow( $res );
+ $count = array();
+ if( preg_match( '/rows=(\d+)/', $row[0], $count ) ) {
+ $rows = $count[1];
+ }
+ $this->freeResult($res);
+ }
+ return $rows;
+ }
+
+
/**
* Returns information about an index
* If errors are explicitly ignored, returns NULL on failure
if ( !$res ) {
return NULL;
}
-
while ( $row = $this->fetchObject( $res ) ) {
- if ( $row->Key_name == $index ) {
+ if ( $row->indexname == $index ) {
return $row;
}
}
}
- function fieldInfo( $table, $field ) {
- throw new DBUnexpectedError($this, '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; $i++ ) {
- // FIXME
- throw new DBUnexpectedError($this, "Database::fieldInfo() error : mysql_fetch_field() not implemented for postgres" );
- $meta = mysql_fetch_field( $res, $i );
- if( $field == $meta->name ) {
- return $meta;
- }
+ /**
+ * INSERT wrapper, inserts an array into a table
+ *
+ * $args may be a single associative array, or an array of these with numeric keys,
+ * for multi-row insert (Postgres version 8.2 and above only).
+ *
+ * @param array $table String: Name of the table to insert to.
+ * @param array $args Array: Items to insert into the table.
+ * @param array $fname String: Name of the function, for profiling
+ * @param mixed $options String or Array. Valid options: IGNORE
+ *
+ * @return bool Success of insert operation. IGNORE always returns true.
+ */
+ function insert( $table, $args, $fname = 'DatabasePostgres::insert', $options = array() ) {
+ global $wgDBversion;
+
+ $table = $this->tableName( $table );
+ if (! isset( $wgDBversion ) ) {
+ $this->getServerVersion();
+ $wgDBversion = $this->numeric_version;
}
- return false;*/
- }
- 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( $options );
- if ( !is_array($options))
- $options = array($options);
+ if ( isset( $args[0] ) && is_array( $args[0] ) ) {
+ $multi = true;
+ $keys = array_keys( $args[0] );
+ }
+ else {
+ $multi = false;
+ $keys = array_keys( $args );
+ }
- if ( in_array( 'IGNORE', $options ) )
- $oldIgnore = $this->ignoreErrors( true );
+ $ignore = in_array( 'IGNORE', $options ) ? 1 : 0;
+ if ( $ignore )
+ $olde = error_reporting( 0 );
- # 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 = "INSERT INTO $table (" . implode( ',', $keys ) . ') VALUES ';
+
+ if ( $multi ) {
+ if ( $wgDBversion >= 8.2 ) {
+ $first = true;
+ foreach ( $args as $row ) {
+ if ( $first ) {
+ $first = false;
+ } else {
+ $sql .= ',';
+ }
+ $sql .= '(' . $this->makeList( $row ) . ')';
+ }
+ $res = (bool)$this->query( $sql, $fname, $ignore );
+ }
+ else {
+ $res = true;
+ $origsql = $sql;
+ foreach ( $args as $row ) {
+ $tempsql = $origsql;
+ $tempsql .= '(' . $this->makeList( $row ) . ')';
+ $tempres = (bool)$this->query( $tempsql, $fname, $ignore );
+ if (! $tempres)
+ $res = false;
+ }
+ }
+ }
+ else {
+ $sql .= '(' . $this->makeList( $args ) . ')';
+ $res = (bool)$this->query( $sql, $fname, $ignore );
}
- foreach ( $a as $row ) {
- parent::insert( $table, $row, $fname, array() );
+
+ if ( $ignore ) {
+ $olde = error_reporting( $olde );
+ return true;
}
- $this->ignoreErrors( $oldIgnore );
- $retVal = true;
- if ( in_array( 'IGNORE', $options ) )
- $this->ignoreErrors( $oldIgnore );
+ return $res;
- return $retVal;
}
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
+ # Replace reserved words with better ones
switch( $name ) {
case 'user':
- case 'old':
- case 'group':
- return '"' . $name . '"';
-
+ return 'mwuser';
+ case 'text':
+ return 'pagecontent';
default:
return $name;
}
}
- function strencode( $s ) {
- return pg_escape_string( $s );
- }
-
/**
* 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;
+ $safeseq = preg_replace( "/'/", "''", $seqName );
+ $res = $this->query( "SELECT nextval('$safeseq')" );
+ $row = $this->fetchRow( $res );
+ $this->mInsertId = $row[0];
+ $this->freeResult( $res );
+ return $this->mInsertId;
}
/**
- * USE INDEX clause
- * PostgreSQL doesn't have them and returns ""
+ * Return the current value of a sequence. Assumes it has ben nextval'ed in this session.
+ */
+ function currentSequenceValue( $seqName ) {
+ $safeseq = preg_replace( "/'/", "''", $seqName );
+ $res = $this->query( "SELECT currval('$safeseq')" );
+ $row = $this->fetchRow( $res );
+ $currval = $row[0];
+ $this->freeResult( $res );
+ return $currval;
+ }
+
+ /**
+ * Postgres does not have a "USE INDEX" clause, so return an empty string
*/
function useIndexClause( $index ) {
return '';
}
# REPLACE query wrapper
- # PostgreSQL simulates this with a DELETE followed by INSERT
+ # Postgres simulates this with a DELETE followed by INSERT
# $row is the row to insert, an associative array
# $uniqueIndexes is an array of indexes. Each element may be either a
# field name or an array of field names
return '';
}
- function limitResult($sql, $limit,$offset) {
+ function limitResult($sql, $limit,$offset=false) {
return "$sql LIMIT $limit ".(is_numeric($offset)?" OFFSET {$offset} ":"");
}
/**
* Returns an SQL expression for a simple conditional.
- * Uses CASE on PostgreSQL.
+ * Uses CASE on Postgres
*
* @param string $cond SQL expression which will result in a boolean value
* @param string $trueVal SQL expression to return if true
return " (CASE WHEN $cond THEN $trueVal ELSE $falseVal END) ";
}
- # FIXME: actually detecting deadlocks might be nice
function wasDeadlock() {
- return false;
+ return $this->lastErrno() == '40P01';
}
- # Return DB-style timestamp used for MySQL schema
function timestamp( $ts=0 ) {
- return wfTimestamp(TS_DB,$ts);
+ return wfTimestamp(TS_POSTGRES,$ts);
}
/**
function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
- $message = "A database error has occurred\n" .
- "Query: $sql\n" .
- "Function: $fname\n" .
- "Error: $errno $error\n";
- throw new DBUnexpectedError($this, $message);
+ # 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 {
+ $message = "A database error has occurred\n" .
+ "Query: $sql\n" .
+ "Function: $fname\n" .
+ "Error: $errno $error\n";
+ throw new DBUnexpectedError($this, $message);
+ }
}
/**
* @return string Version information from the database
*/
function getServerVersion() {
- $res = $this->query( "SELECT version()" );
- $row = $this->fetchRow( $res );
- $version = $row[0];
- $this->freeResult( $res );
+ $version = pg_fetch_result($this->doQuery("SELECT version()"),0,0);
+ $thisver = array();
+ if (!preg_match('/PostgreSQL (\d+\.\d+)(\S+)/', $version, $thisver)) {
+ die("Could not determine the numeric version from $version!");
+ }
+ $this->numeric_version = $thisver[1];
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");
+
+ /**
+ * Query whether a given relation exists (in the given schema, or the
+ * default mw one if not given)
+ */
+ function relationExists( $table, $types, $schema = false ) {
+ global $wgDBmwschema;
+ if (!is_array($types))
+ $types = array($types);
+ if (! $schema )
+ $schema = $wgDBmwschema;
+ $etable = $this->addQuotes($table);
+ $eschema = $this->addQuotes($schema);
+ $SQL = "SELECT 1 FROM pg_catalog.pg_class c, pg_catalog.pg_namespace n "
+ . "WHERE c.relnamespace = n.oid AND c.relname = $etable AND n.nspname = $eschema "
+ . "AND c.relkind IN ('" . implode("','", $types) . "')";
+ $res = $this->query( $SQL );
+ $count = $res ? $res->numRows() : 0;
+ if ($res)
+ $this->freeResult( $res );
+ return $count ? true : false;
}
+ /*
+ * For backward compatibility, this function checks both tables and
+ * views.
+ */
+ function tableExists ($table, $schema = false) {
+ return $this->relationExists($table, array('r', 'v'), $schema);
+ }
+
+ function sequenceExists ($sequence, $schema = false) {
+ return $this->relationExists($sequence, 'S', $schema);
+ }
+
+ function triggerExists($table, $trigger) {
+ global $wgDBmwschema;
+
+ $q = <<<END
+ SELECT 1 FROM pg_class, pg_namespace, pg_trigger
+ WHERE relnamespace=pg_namespace.oid AND relkind='r'
+ AND tgrelid=pg_class.oid
+ AND nspname=%s AND relname=%s AND tgname=%s
+END;
+ $res = $this->query(sprintf($q,
+ $this->addQuotes($wgDBmwschema),
+ $this->addQuotes($table),
+ $this->addQuotes($trigger)));
+ if (!$res)
+ return NULL;
+ $rows = $res->numRows();
+ $this->freeResult($res);
+ return $rows;
+ }
+
+ function ruleExists($table, $rule) {
+ global $wgDBmwschema;
+ $exists = $this->selectField("pg_rules", "rulename",
+ array( "rulename" => $rule,
+ "tablename" => $table,
+ "schemaname" => $wgDBmwschema));
+ return $exists === $rule;
+ }
+
+ function constraintExists($table, $constraint) {
+ global $wgDBmwschema;
+ $SQL = sprintf("SELECT 1 FROM information_schema.table_constraints ".
+ "WHERE constraint_schema = %s AND table_name = %s AND constraint_name = %s",
+ $this->addQuotes($wgDBmwschema),
+ $this->addQuotes($table),
+ $this->addQuotes($constraint));
+ $res = $this->query($SQL);
+ if (!$res)
+ return NULL;
+ $rows = $res->numRows();
+ $this->freeResult($res);
+ return $rows;
+ }
/**
- * Query whether a given table exists
+ * Query whether a given schema exists. Returns the name of the owner
*/
- function tableExists( $table ) {
- global $wgDBschema;
- $safetable = preg_replace("/'/", "''", $table);
- $SQL = "SELECT 1 FROM pg_catalog.pg_class c, pg_catalog.pg_namespace n WHERE c.relnamespace = n.oid "
- . "AND c.relname = '$safetable' AND n.nspname = '$wgDBschema'";
- $res = $this->query($SQL);
- if( $res ) {
- $this->freeResult( $res );
- return true;
+ function schemaExists( $schema ) {
+ $eschema = preg_replace("/'/", "''", $schema);
+ $SQL = "SELECT rolname FROM pg_catalog.pg_namespace n, pg_catalog.pg_roles r "
+ ."WHERE n.nspowner=r.oid AND n.nspname = '$eschema'";
+ $res = $this->query( $SQL );
+ if ( $res && $res->numRows() ) {
+ $row = $res->fetchObject();
+ $owner = $row->rolname;
} else {
- return false;
+ $owner = false;
}
+ if ($res)
+ $this->freeResult($res);
+ return $owner;
}
+ /**
+ * Query whether a given column exists in the mediawiki schema
+ */
function fieldExists( $table, $field, $fname = 'DatabasePostgres::fieldExists' ) {
- global $wgDBschema;
- $safetable = preg_replace("/'/", "''", $table);
- $safecol = preg_replace("/'/", "''", $field);
- $SQL = "SELECT 1 FROM pg_catalog.pg_class c, pg_catalog.pg_namespace n, pg_attribute a "
- . "WHERE c.relnamespace = n.oid AND c.relname = '$safetable' AND n.nspname = '$wgDBschema' "
- . "AND a.attrelid = c.oid AND a.attname = '$safecol'";
- $res = $this->query($SQL, $fname);
- if( $res ) {
+ global $wgDBmwschema;
+ $etable = preg_replace("/'/", "''", $table);
+ $eschema = preg_replace("/'/", "''", $wgDBmwschema);
+ $ecol = preg_replace("/'/", "''", $field);
+ $SQL = "SELECT 1 FROM pg_catalog.pg_class c, pg_catalog.pg_namespace n, pg_catalog.pg_attribute a "
+ . "WHERE c.relnamespace = n.oid AND c.relname = '$etable' AND n.nspname = '$eschema' "
+ . "AND a.attrelid = c.oid AND a.attname = '$ecol'";
+ $res = $this->query( $SQL, $fname );
+ $count = $res ? $res->numRows() : 0;
+ if ($res)
$this->freeResult( $res );
- return true;
- } else {
- return false;
+ return $count;
+ }
+
+ function fieldInfo( $table, $field ) {
+ return PostgresField::fromText($this, $table, $field);
+ }
+
+ function begin( $fname = 'DatabasePostgres::begin' ) {
+ $this->query( 'BEGIN', $fname );
+ $this->mTrxLevel = 1;
+ }
+ function immediateCommit( $fname = 'DatabasePostgres::immediateCommit' ) {
+ return true;
+ }
+ function commit( $fname = 'DatabasePostgres::commit' ) {
+ $this->query( 'COMMIT', $fname );
+ $this->mTrxLevel = 0;
+ }
+
+ /* Not even sure why this is used in the main codebase... */
+ function limitResultForUpdate($sql, $num) {
+ return $sql;
+ }
+
+ function setup_database() {
+ global $wgVersion, $wgDBmwschema, $wgDBts2schema, $wgDBport, $wgDBuser;
+
+ ## Make sure that we can write to the correct schema
+ ## If not, Postgres will happily and silently go to the next search_path item
+ $ctest = "mw_test_table";
+ $safeschema = $this->quote_ident($wgDBmwschema);
+ if ($this->tableExists($ctest, $wgDBmwschema)) {
+ $this->doQuery("DROP TABLE $safeschema.$ctest");
+ }
+ $SQL = "CREATE TABLE $safeschema.$ctest(a int)";
+ $olde = error_reporting( 0 );
+ $res = $this->doQuery($SQL);
+ error_reporting( $olde );
+ if (!$res) {
+ print "<b>FAILED</b>. Make sure that the user \"$wgDBuser\" can write to the schema \"$wgDBmwschema\"</li>\n";
+ dieout("</ul>");
+ }
+ $this->doQuery("DROP TABLE $safeschema.mw_test_table");
+
+ dbsource( "../maintenance/postgres/tables.sql", $this);
+
+ ## Version-specific stuff
+ if ($this->numeric_version == 8.1) {
+ $this->doQuery("CREATE INDEX ts2_page_text ON pagecontent USING gist(textvector)");
+ $this->doQuery("CREATE INDEX ts2_page_title ON page USING gist(titlevector)");
+ }
+ else {
+ $this->doQuery("CREATE INDEX ts2_page_text ON pagecontent USING gin(textvector)");
+ $this->doQuery("CREATE INDEX ts2_page_title ON page USING gin(titlevector)");
+ }
+
+ ## Update version information
+ $mwv = $this->addQuotes($wgVersion);
+ $pgv = $this->addQuotes($this->getServerVersion());
+ $pgu = $this->addQuotes($this->mUser);
+ $mws = $this->addQuotes($wgDBmwschema);
+ $tss = $this->addQuotes($wgDBts2schema);
+ $pgp = $this->addQuotes($wgDBport);
+ $dbn = $this->addQuotes($this->mDBname);
+ $ctype = pg_fetch_result($this->doQuery("SHOW lc_ctype"),0,0);
+
+ $SQL = "UPDATE mediawiki_version SET mw_version=$mwv, pg_version=$pgv, pg_user=$pgu, ".
+ "mw_schema = $mws, ts2_schema = $tss, pg_port=$pgp, pg_dbname=$dbn, ".
+ "ctype = '$ctype' ".
+ "WHERE type = 'Creation'";
+ $this->query($SQL);
+
+ ## Avoid the non-standard "REPLACE INTO" syntax
+ $f = fopen( "../maintenance/interwiki.sql", 'r' );
+ if ($f == false ) {
+ dieout( "<li>Could not find the interwiki.sql file");
}
+ ## We simply assume it is already empty as we have just created it
+ $SQL = "INSERT INTO interwiki(iw_prefix,iw_url,iw_local) VALUES ";
+ while ( ! feof( $f ) ) {
+ $line = fgets($f,1024);
+ $matches = array();
+ if (!preg_match('/^\s*(\(.+?),(\d)\)/', $line, $matches)) {
+ continue;
+ }
+ $this->query("$SQL $matches[1],$matches[2])");
+ }
+ print " (table interwiki successfully populated)...\n";
+
+ $this->doQuery("COMMIT");
}
+ function encodeBlob( $b ) {
+ return new Blob ( pg_escape_bytea( $b ) ) ;
+ }
+
+ function decodeBlob( $b ) {
+ if ($b instanceof Blob) {
+ $b = $b->fetch();
+ }
+ return pg_unescape_bytea( $b );
+ }
+ function strencode( $s ) { ## Should not be called by us
+ return pg_escape_string( $s );
+ }
+ function addQuotes( $s ) {
+ if ( is_null( $s ) ) {
+ return 'NULL';
+ } else if ($s instanceof Blob) {
+ return "'".$s->fetch($s)."'";
+ }
+ return "'" . pg_escape_string($s) . "'";
+ }
+
+ function quote_ident( $s ) {
+ return '"' . preg_replace( '/"/', '""', $s) . '"';
+ }
+
+ /* For now, does nothing */
+ function selectDB( $db ) {
+ return true;
+ }
+
+ /**
+ * Various select options
+ *
+ * @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 = $useIndex = '';
+
+ $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';
+
+ return array( $startOpts, $useIndex, $preLimitTail, $postLimitTail );
+ }
+
+ public function setTimeout( $timeout ) {
+ // @todo fixme no-op
+ }
+
+ function ping() {
+ wfDebug( "Function ping() not written for DatabasePostgres.php yet");
+ return true;
+ }
+
+ /**
+ * How lagged is this slave?
+ *
+ */
+ public function getLag() {
+ # Not implemented for PostgreSQL
+ return false;
+ }
+
+ function buildConcat( $stringList ) {
+ return implode( ' || ', $stringList );
+ }
+
+} // end DatabasePostgres class
-}
-?>
dépôts / lhc / web / wiklou.git / blobdiff