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authorsvncommit <devs@roundcube.net>2005-10-27 13:40:37 +0000
committersvncommit <devs@roundcube.net>2005-10-27 13:40:37 +0000
commitc9462d0c1e2493a7399b1dbd21e23b215e97f808 (patch)
treeb31f3af65a271ae651e76d1230737fbd930c27aa /program/lib/MDB2/Driver/pgsql.php
parent4518342eca8d40f1c25ff877e00379c1e878035f (diff)
added all mdb2 drivers
Diffstat (limited to 'program/lib/MDB2/Driver/pgsql.php')
-rwxr-xr-xprogram/lib/MDB2/Driver/pgsql.php771
1 files changed, 771 insertions, 0 deletions
diff --git a/program/lib/MDB2/Driver/pgsql.php b/program/lib/MDB2/Driver/pgsql.php
new file mode 100755
index 000000000..72891b0b6
--- /dev/null
+++ b/program/lib/MDB2/Driver/pgsql.php
@@ -0,0 +1,771 @@
+<?php
+// vim: set et ts=4 sw=4 fdm=marker:
+// +----------------------------------------------------------------------+
+// | PHP versions 4 and 5 |
+// +----------------------------------------------------------------------+
+// | Copyright (c) 1998-2004 Manuel Lemos, Tomas V.V.Cox, |
+// | Stig. S. Bakken, Lukas Smith |
+// | All rights reserved. |
+// +----------------------------------------------------------------------+
+// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
+// | API as well as database abstraction for PHP applications. |
+// | This LICENSE is in the BSD license style. |
+// | |
+// | Redistribution and use in source and binary forms, with or without |
+// | modification, are permitted provided that the following conditions |
+// | are met: |
+// | |
+// | Redistributions of source code must retain the above copyright |
+// | notice, this list of conditions and the following disclaimer. |
+// | |
+// | Redistributions in binary form must reproduce the above copyright |
+// | notice, this list of conditions and the following disclaimer in the |
+// | documentation and/or other materials provided with the distribution. |
+// | |
+// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
+// | Lukas Smith nor the names of his contributors may be used to endorse |
+// | or promote products derived from this software without specific prior|
+// | written permission. |
+// | |
+// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
+// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
+// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
+// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
+// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
+// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
+// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
+// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
+// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
+// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
+// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
+// | POSSIBILITY OF SUCH DAMAGE. |
+// +----------------------------------------------------------------------+
+// | Author: Paul Cooper <pgc@ucecom.com> |
+// +----------------------------------------------------------------------+
+//
+// $Id$
+
+/**
+ * MDB2 PostGreSQL driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author Paul Cooper <pgc@ucecom.com>
+ */
+class MDB2_Driver_pgsql extends MDB2_Driver_Common
+{
+ // {{{ properties
+ var $escape_quotes = "\\";
+
+ // }}}
+ // {{{ constructor
+
+ /**
+ * Constructor
+ */
+ function __construct()
+ {
+ parent::__construct();
+
+ $this->phptype = 'pgsql';
+ $this->dbsyntax = 'pgsql';
+
+ $this->supported['sequences'] = true;
+ $this->supported['indexes'] = true;
+ $this->supported['affected_rows'] = true;
+ $this->supported['summary_functions'] = true;
+ $this->supported['order_by_text'] = true;
+ $this->supported['transactions'] = true;
+ $this->supported['current_id'] = true;
+ $this->supported['limit_queries'] = true;
+ $this->supported['LOBs'] = true;
+ $this->supported['replace'] = 'emulated';
+ $this->supported['sub_selects'] = true;
+ $this->supported['auto_increment'] = 'emulated';
+ $this->supported['primary_key'] = true;
+ }
+
+ // }}}
+ // {{{ errorInfo()
+
+ /**
+ * This method is used to collect information about an error
+ *
+ * @param integer $error
+ * @return array
+ * @access public
+ */
+ function errorInfo($error = null)
+ {
+ // Fall back to MDB2_ERROR if there was no mapping.
+ $error_code = MDB2_ERROR;
+
+ $native_msg = '';
+ if (is_resource($error)) {
+ $native_msg = @pg_result_error($error);
+ } elseif ($this->connection) {
+ $native_msg = @pg_last_error($this->connection);
+ if (!$native_msg && @pg_connection_status($this->connection) === PGSQL_CONNECTION_BAD) {
+ $native_msg = 'Database connection has been lost.';
+ $error_code = MDB2_ERROR_CONNECT_FAILED;
+ }
+ }
+
+ static $error_regexps;
+ if (empty($error_regexps)) {
+ $error_regexps = array(
+ '/column .* (of relation .*)?does not exist/i'
+ => MDB2_ERROR_NOSUCHFIELD,
+ '/(relation|sequence|table).*does not exist|class .* not found/i'
+ => MDB2_ERROR_NOSUCHTABLE,
+ '/index .* does not exist/'
+ => MDB2_ERROR_NOT_FOUND,
+ '/relation .* already exists/i'
+ => MDB2_ERROR_ALREADY_EXISTS,
+ '/(divide|division) by zero$/i'
+ => MDB2_ERROR_DIVZERO,
+ '/pg_atoi: error in .*: can\'t parse /i'
+ => MDB2_ERROR_INVALID_NUMBER,
+ '/invalid input syntax for( type)? (integer|numeric)/i'
+ => MDB2_ERROR_INVALID_NUMBER,
+ '/value .* is out of range for type \w*int/i'
+ => MDB2_ERROR_INVALID_NUMBER,
+ '/integer out of range/i'
+ => MDB2_ERROR_INVALID_NUMBER,
+ '/value too long for type character/i'
+ => MDB2_ERROR_INVALID,
+ '/attribute .* not found|relation .* does not have attribute/i'
+ => MDB2_ERROR_NOSUCHFIELD,
+ '/column .* specified in USING clause does not exist in (left|right) table/i'
+ => MDB2_ERROR_NOSUCHFIELD,
+ '/parser: parse error at or near/i'
+ => MDB2_ERROR_SYNTAX,
+ '/syntax error at/'
+ => MDB2_ERROR_SYNTAX,
+ '/column reference .* is ambiguous/i'
+ => MDB2_ERROR_SYNTAX,
+ '/permission denied/'
+ => MDB2_ERROR_ACCESS_VIOLATION,
+ '/violates not-null constraint/'
+ => MDB2_ERROR_CONSTRAINT_NOT_NULL,
+ '/violates [\w ]+ constraint/'
+ => MDB2_ERROR_CONSTRAINT,
+ '/referential integrity violation/'
+ => MDB2_ERROR_CONSTRAINT,
+ '/more expressions than target columns/i'
+ => MDB2_ERROR_VALUE_COUNT_ON_ROW,
+ );
+ }
+ foreach ($error_regexps as $regexp => $code) {
+ if (preg_match($regexp, $native_msg)) {
+ $error_code = $code;
+ break;
+ }
+ }
+
+ return array($error_code, null, $native_msg);
+ }
+
+ // }}}
+ // {{{ beginTransaction()
+
+ /**
+ * Start a transaction.
+ *
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function beginTransaction()
+ {
+ $this->debug('starting transaction', 'beginTransaction');
+ if ($this->in_transaction) {
+ return MDB2_OK; //nothing to do
+ }
+ if (!$this->destructor_registered && $this->opened_persistent) {
+ $this->destructor_registered = true;
+ register_shutdown_function('MDB2_closeOpenTransactions');
+ }
+ $result = $this->_doQuery('BEGIN', true);
+ if (PEAR::isError($result)) {
+ return $result;
+ }
+ $this->in_transaction = true;
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ commit()
+
+ /**
+ * Commit the database changes done during a transaction that is in
+ * progress.
+ *
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function commit()
+ {
+ $this->debug('commit transaction', 'commit');
+ if (!$this->in_transaction) {
+ return $this->raiseError(MDB2_ERROR, null, null,
+ 'commit: transaction changes are being auto committed');
+ }
+ $result = $this->_doQuery('COMMIT', true);
+ if (PEAR::isError($result)) {
+ return $result;
+ }
+ $this->in_transaction = false;
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ rollback()
+
+ /**
+ * Cancel any database changes done during a transaction that is in
+ * progress.
+ *
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function rollback()
+ {
+ $this->debug('rolling back transaction', 'rollback');
+ if (!$this->in_transaction) {
+ return $this->raiseError(MDB2_ERROR, null, null,
+ 'rollback: transactions can not be rolled back when changes are auto committed');
+ }
+ $result = $this->_doQuery('ROLLBACK', true);
+ if (PEAR::isError($result)) {
+ return $result;
+ }
+ $this->in_transaction = false;
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ _doConnect()
+
+ /**
+ * Does the grunt work of connecting to the database
+ *
+ * @return mixed connection resource on success, MDB2 Error Object on failure
+ * @access protected
+ **/
+ function _doConnect($database_name, $persistent = false)
+ {
+ if ($database_name == '') {
+ $database_name = 'template1';
+ }
+
+ $protocol = $this->dsn['protocol'] ? $this->dsn['protocol'] : 'tcp';
+
+ $params = array('');
+ if ($protocol == 'tcp') {
+ if ($this->dsn['hostspec']) {
+ $params[0].= 'host=' . $this->dsn['hostspec'];
+ }
+ if ($this->dsn['port']) {
+ $params[0].= ' port=' . $this->dsn['port'];
+ }
+ } elseif ($protocol == 'unix') {
+ // Allow for pg socket in non-standard locations.
+ if ($this->dsn['socket']) {
+ $params[0].= 'host=' . $this->dsn['socket'];
+ }
+ if ($this->dsn['port']) {
+ $params[0].= ' port=' . $this->dsn['port'];
+ }
+ }
+ if ($database_name) {
+ $params[0].= ' dbname=\'' . addslashes($database_name) . '\'';
+ }
+ if ($this->dsn['username']) {
+ $params[0].= ' user=\'' . addslashes($this->dsn['username']) . '\'';
+ }
+ if ($this->dsn['password']) {
+ $params[0].= ' password=\'' . addslashes($this->dsn['password']) . '\'';
+ }
+ if (!empty($this->dsn['options'])) {
+ $params[0].= ' options=' . $this->dsn['options'];
+ }
+ if (!empty($this->dsn['tty'])) {
+ $params[0].= ' tty=' . $this->dsn['tty'];
+ }
+ if (!empty($this->dsn['connect_timeout'])) {
+ $params[0].= ' connect_timeout=' . $this->dsn['connect_timeout'];
+ }
+ if (!empty($this->dsn['sslmode'])) {
+ $params[0].= ' sslmode=' . $this->dsn['sslmode'];
+ }
+ if (!empty($this->dsn['service'])) {
+ $params[0].= ' service=' . $this->dsn['service'];
+ }
+
+ if (isset($this->dsn['new_link'])
+ && ($this->dsn['new_link'] == 'true' || $this->dsn['new_link'] === true))
+ {
+ if (version_compare(phpversion(), '4.3.0', '>=')) {
+ $params[] = PGSQL_CONNECT_FORCE_NEW;
+ }
+ }
+
+ $connect_function = $persistent ? 'pg_pconnect' : 'pg_connect';
+
+ putenv('PGDATESTYLE=ISO');
+
+ @ini_set('track_errors', true);
+ $php_errormsg = '';
+ $connection = @call_user_func_array($connect_function, $params);
+ @ini_restore('track_errors');
+ if (!$connection) {
+ return $this->raiseError(MDB2_ERROR_CONNECT_FAILED,
+ null, null, strip_tags($php_errormsg));
+ }
+ return $connection;
+ }
+
+ // }}}
+ // {{{ connect()
+
+ /**
+ * Connect to the database
+ *
+ * @return true on success, MDB2 Error Object on failure
+ * @access public
+ **/
+ function connect()
+ {
+ if (is_resource($this->connection)) {
+ if (count(array_diff($this->connected_dsn, $this->dsn)) == 0
+ && $this->connected_database_name == $this->database_name
+ && ($this->opened_persistent == $this->options['persistent'])
+ ) {
+ return MDB2_OK;
+ }
+ $this->disconnect(false);
+ }
+
+ if (!PEAR::loadExtension($this->phptype)) {
+ return $this->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
+ 'connect: extension '.$this->phptype.' is not compiled into PHP');
+ }
+
+ if ($this->database_name) {
+ $connection = $this->_doConnect($this->database_name, $this->options['persistent']);
+ if (PEAR::isError($connection)) {
+ return $connection;
+ }
+ $this->connection = $connection;
+ $this->connected_dsn = $this->dsn;
+ $this->connected_database_name = $this->database_name;
+ $this->opened_persistent = $this->options['persistent'];
+ $this->dbsyntax = $this->dsn['dbsyntax'] ? $this->dsn['dbsyntax'] : $this->phptype;
+ }
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ disconnect()
+
+ /**
+ * Log out and disconnect from the database.
+ *
+ * @return mixed true on success, false if not connected and error
+ * object on error
+ * @access public
+ */
+ function disconnect($force = true)
+ {
+ if (is_resource($this->connection)) {
+ if (!$this->opened_persistent || $force) {
+ @pg_close($this->connection);
+ }
+ $this->connection = 0;
+ }
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ standaloneQuery()
+
+ /**
+ * execute a query as DBA
+ *
+ * @param string $query the SQL query
+ * @param mixed $types array that contains the types of the columns in
+ * the result set
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function &standaloneQuery($query, $types = null)
+ {
+ $connection = $this->_doConnect('template1', false);
+ if (PEAR::isError($connection)) {
+ $err =& $this->raiseError(MDB2_ERROR_CONNECT_FAILED, null, null,
+ 'Cannot connect to template1');
+ return $err;
+ }
+
+ $isManip = MDB2::isManip($query);
+ $offset = $this->row_offset;
+ $limit = $this->row_limit;
+ $this->row_offset = $this->row_limit = 0;
+ $query = $this->_modifyQuery($query, $isManip, $limit, $offset);
+
+ $result = $this->_doQuery($query, $isManip, $connection, false);
+ @pg_close($connection);
+ if (PEAR::isError($result)) {
+ return $result;
+ }
+
+ if ($isManip) {
+ return $result;
+ }
+
+ $result =& $this->_wrapResult($result, $types, true, false, $limit, $offset);
+ return $result;
+ }
+
+ // }}}
+ // {{{ _doQuery()
+
+ /**
+ * Execute a query
+ * @param string $query query
+ * @param boolean $isManip if the query is a manipulation query
+ * @param resource $connection
+ * @param string $database_name
+ * @return result or error object
+ * @access protected
+ */
+ function _doQuery($query, $isManip = false, $connection = null, $database_name = null)
+ {
+ $this->last_query = $query;
+ $this->debug($query, 'query');
+ if ($this->options['disable_query']) {
+ if ($isManip) {
+ return 0;
+ }
+ return null;
+ }
+
+ if (is_null($connection)) {
+ $err = $this->connect();
+ if (PEAR::isError($err)) {
+ return $err;
+ }
+ $connection = $this->connection;
+ }
+
+ $result = @pg_query($connection, $query);
+ if (!$result) {
+ return $this->raiseError();
+ }
+
+ if ($isManip) {
+ return @pg_affected_rows($result);
+ } elseif (!preg_match('/^\s*\(*\s*(SELECT|EXPLAIN|FETCH|SHOW)\s/si', $query)) {
+ return 0;
+ }
+ return $result;
+ }
+
+ // }}}
+ // {{{ _modifyQuery()
+
+ /**
+ * Changes a query string for various DBMS specific reasons
+ *
+ * @param string $query query to modify
+ * @return the new (modified) query
+ * @access protected
+ */
+ function _modifyQuery($query, $isManip, $limit, $offset)
+ {
+ if ($limit > 0
+ && !preg_match('/LIMIT\s*\d(\s*(,|OFFSET)\s*\d+)?/i', $query)
+ ) {
+ $query = rtrim($query);
+ if (substr($query, -1) == ';') {
+ $query = substr($query, 0, -1);
+ }
+ if ($isManip) {
+ $manip = preg_replace('/^(DELETE FROM|UPDATE).*$/', '\\1', $query);
+ $from = $match[2];
+ $where = $match[3];
+ $query = $manip.' '.$from.' WHERE ctid=(SELECT ctid FROM '.$from.' '.$where.' LIMIT '.$limit.')';
+ } else {
+ $query.= " LIMIT $limit OFFSET $offset";
+ }
+ }
+ return $query;
+ }
+
+ // }}}
+ // {{{ nextID()
+
+ /**
+ * returns the next free id of a sequence
+ *
+ * @param string $seq_name name of the sequence
+ * @param boolean $ondemand when true the seqence is
+ * automatic created, if it
+ * not exists
+ * @return mixed MDB2 Error Object or id
+ * @access public
+ */
+ function nextID($seq_name, $ondemand = true)
+ {
+ $sequence_name = $this->getSequenceName($seq_name);
+ $query = "SELECT NEXTVAL('$sequence_name')";
+ $this->expectError(MDB2_ERROR_NOSUCHTABLE);
+ $result = $this->queryOne($query, 'integer');
+ $this->popExpect();
+ if (PEAR::isError($result)) {
+ if ($ondemand && $result->getCode() == MDB2_ERROR_NOSUCHTABLE) {
+ $this->loadModule('Manager');
+ $result = $this->manager->createSequence($seq_name, 1);
+ if (PEAR::isError($result)) {
+ return $this->raiseError(MDB2_ERROR, null, null,
+ 'nextID: on demand sequence could not be created');
+ }
+ return $this->nextId($seq_name, false);
+ }
+ }
+ return $result;
+ }
+
+ // }}}
+ // {{{ currID()
+
+ /**
+ * returns the current id of a sequence
+ *
+ * @param string $seq_name name of the sequence
+ * @return mixed MDB2 Error Object or id
+ * @access public
+ */
+ function currID($seq_name)
+ {
+ $sequence_name = $this->getSequenceName($seq_name);
+ return $this->queryOne("SELECT last_value FROM $sequence_name", 'integer');
+ }
+}
+
+class MDB2_Result_pgsql extends MDB2_Result_Common
+{
+ // }}}
+ // {{{ fetchRow()
+
+ /**
+ * Fetch a row and insert the data into an existing array.
+ *
+ * @param int $fetchmode how the array data should be indexed
+ * @param int $rownum number of the row where the data can be found
+ * @return int data array on success, a MDB2 error on failure
+ * @access public
+ */
+ function &fetchRow($fetchmode = MDB2_FETCHMODE_DEFAULT, $rownum = null)
+ {
+ if (!is_null($rownum)) {
+ $seek = $this->seek($rownum);
+ if (PEAR::isError($seek)) {
+ return $seek;
+ }
+ }
+ if ($fetchmode == MDB2_FETCHMODE_DEFAULT) {
+ $fetchmode = $this->db->fetchmode;
+ }
+ if ($fetchmode & MDB2_FETCHMODE_ASSOC) {
+ $row = @pg_fetch_array($this->result, null, PGSQL_ASSOC);
+ if (is_array($row)
+ && $this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE
+ ) {
+ $row = array_change_key_case($row, $this->db->options['field_case']);
+ }
+ } else {
+ $row = @pg_fetch_row($this->result);
+ }
+ if (!$row) {
+ if (is_null($this->result)) {
+ $err =& $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'fetchRow: resultset has already been freed');
+ return $err;
+ }
+ $null = null;
+ return $null;
+ }
+ if ($this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL) {
+ $this->db->_fixResultArrayValues($row, MDB2_PORTABILITY_EMPTY_TO_NULL);
+ }
+ if (!empty($this->values)) {
+ $this->_assignBindColumns($row);
+ }
+ if (!empty($this->types)) {
+ $row = $this->db->datatype->convertResultRow($this->types, $row);
+ }
+ if ($fetchmode === MDB2_FETCHMODE_OBJECT) {
+ $object_class = $this->db->options['fetch_class'];
+ if ($object_class == 'stdClass') {
+ $row = (object) $row;
+ } else {
+ $row = &new $object_class($row);
+ }
+ }
+ ++$this->rownum;
+ return $row;
+ }
+
+ // }}}
+ // {{{ _getColumnNames()
+
+ /**
+ * Retrieve the names of columns returned by the DBMS in a query result.
+ *
+ * @return mixed an associative array variable
+ * that will hold the names of columns. The
+ * indexes of the array are the column names
+ * mapped to lower case and the values are the
+ * respective numbers of the columns starting
+ * from 0. Some DBMS may not return any
+ * columns when the result set does not
+ * contain any rows.
+ *
+ * a MDB2 error on failure
+ * @access private
+ */
+ function _getColumnNames()
+ {
+ $columns = array();
+ $numcols = $this->numCols();
+ if (PEAR::isError($numcols)) {
+ return $numcols;
+ }
+ for ($column = 0; $column < $numcols; $column++) {
+ $column_name = @pg_field_name($this->result, $column);
+ $columns[$column_name] = $column;
+ }
+ if ($this->db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
+ $columns = array_change_key_case($columns, $this->db->options['field_case']);
+ }
+ return $columns;
+ }
+
+ // }}}
+ // {{{ numCols()
+
+ /**
+ * Count the number of columns returned by the DBMS in a query result.
+ *
+ * @access public
+ * @return mixed integer value with the number of columns, a MDB2 error
+ * on failure
+ */
+ function numCols()
+ {
+ $cols = @pg_num_fields($this->result);
+ if (is_null($cols)) {
+ if (is_null($this->result)) {
+ return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'numCols: resultset has already been freed');
+ }
+ return $this->db->raiseError();
+ }
+ return $cols;
+ }
+
+ // }}}
+ // {{{ free()
+
+ /**
+ * Free the internal resources associated with result.
+ *
+ * @return boolean true on success, false if result is invalid
+ * @access public
+ */
+ function free()
+ {
+ $free = @pg_free_result($this->result);
+ if (!$free) {
+ if (is_null($this->result)) {
+ return MDB2_OK;
+ }
+ return $this->db->raiseError();
+ }
+ $this->result = null;
+ return MDB2_OK;
+ }
+}
+
+class MDB2_BufferedResult_pgsql extends MDB2_Result_pgsql
+{
+ // {{{ seek()
+
+ /**
+ * seek to a specific row in a result set
+ *
+ * @param int $rownum number of the row where the data can be found
+ * @return mixed MDB2_OK on success, a MDB2 error on failure
+ * @access public
+ */
+ function seek($rownum = 0)
+ {
+ if ($this->rownum != ($rownum - 1) && !@pg_result_seek($this->result, $rownum)) {
+ if (is_null($this->result)) {
+ return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'seek: resultset has already been freed');
+ }
+ return $this->db->raiseError(MDB2_ERROR_INVALID, null, null,
+ 'seek: tried to seek to an invalid row number ('.$rownum.')');
+ }
+ $this->rownum = $rownum - 1;
+ return MDB2_OK;
+ }
+
+ // }}}
+ // {{{ valid()
+
+ /**
+ * check if the end of the result set has been reached
+ *
+ * @return mixed true or false on sucess, a MDB2 error on failure
+ * @access public
+ */
+ function valid()
+ {
+ $numrows = $this->numRows();
+ if (PEAR::isError($numrows)) {
+ return $numrows;
+ }
+ return $this->rownum < ($numrows - 1);
+ }
+
+ // }}}
+ // {{{ numRows()
+
+ /**
+ * returns the number of rows in a result object
+ *
+ * @return mixed MDB2 Error Object or the number of rows
+ * @access public
+ */
+ function numRows()
+ {
+ $rows = @pg_num_rows($this->result);
+ if (is_null($rows)) {
+ if (is_null($this->result)) {
+ return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+ 'numRows: resultset has already been freed');
+ }
+ return $this->raiseError();
+ }
+ return $rows;
+ }
+}
+
+class MDB2_Statement_pgsql extends MDB2_Statement_Common
+{
+
+}
+?> \ No newline at end of file