added all mdb2 drivers

1 files changed, 805 insertions, 0 deletions

diff --git a/program/lib/MDB2/Driver/sqlite.php b/program/lib/MDB2/Driver/sqlite.php
new file mode 100755
index 000000000..231b429d4
--- /dev/null
+++ b/program/lib/MDB2/Driver/sqlite.php
@@ -0,0 +1,805 @@
+<?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: Lukas Smith <smith@backendmedia.com>                         |
+// +----------------------------------------------------------------------+
+//
+// $Id$
+//
+
+/**
+ * MDB2 SQLite driver
+ *
+ * @package MDB2
+ * @category Database
+ * @author  Lukas Smith <smith@backendmedia.com>
+ */
+class MDB2_Driver_sqlite extends MDB2_Driver_Common
+{
+    // {{{ properties
+    var $escape_quotes = "'";
+
+    var $_lasterror = '';
+
+    // }}}
+    // {{{ constructor
+
+    /**
+    * Constructor
+    */
+    function __construct()
+    {
+        parent::__construct();
+
+        $this->phptype = 'sqlite';
+        $this->dbsyntax = 'sqlite';
+
+        $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['current_id'] = true;
+        $this->supported['limit_queries'] = true;
+        $this->supported['LOBs'] = true;
+        $this->supported['replace'] = true;
+        $this->supported['transactions'] = true;
+        $this->supported['sub_selects'] = true;
+        $this->supported['auto_increment'] = true;
+
+        $this->options['base_transaction_name'] = '___php_MDB2_sqlite_auto_commit_off';
+        $this->options['fixed_float'] = 0;
+        $this->options['database_path'] = '';
+        $this->options['database_extension'] = '';
+    }
+
+    // }}}
+    // {{{ errorInfo()
+
+    /**
+     * This method is used to collect information about an error
+     *
+     * @param integer $error
+     * @return array
+     * @access public
+     */
+    function errorInfo($error = null)
+    {
+        $native_code = null;
+        if ($this->connection) {
+            $native_code = @sqlite_last_error($this->connection);
+        }
+        $native_msg  = @sqlite_error_string($native_code);
+
+        if (is_null($error)) {
+            static $error_regexps;
+            if (empty($error_regexps)) {
+                $error_regexps = array(
+                    '/^no such table:/' => MDB2_ERROR_NOSUCHTABLE,
+                    '/^no such index:/' => MDB2_ERROR_NOT_FOUND,
+                    '/^(table|index) .* already exists$/' => MDB2_ERROR_ALREADY_EXISTS,
+                    '/PRIMARY KEY must be unique/i' => MDB2_ERROR_CONSTRAINT,
+                    '/is not unique/' => MDB2_ERROR_CONSTRAINT,
+                    '/columns .* are not unique/i' => MDB2_ERROR_CONSTRAINT,
+                    '/uniqueness constraint failed/' => MDB2_ERROR_CONSTRAINT,
+                    '/may not be NULL/' => MDB2_ERROR_CONSTRAINT_NOT_NULL,
+                    '/^no such column:/' => MDB2_ERROR_NOSUCHFIELD,
+                    '/column not present in both tables/i' => MDB2_ERROR_NOSUCHFIELD,
+                    '/^near ".*": syntax error$/' => MDB2_ERROR_SYNTAX,
+                    '/[0-9]+ values for [0-9]+ columns/i' => MDB2_ERROR_VALUE_COUNT_ON_ROW,
+                 );
+            }
+            foreach ($error_regexps as $regexp => $code) {
+                if (preg_match($regexp, $this->_lasterror)) {
+                    $error = $code;
+                    break;
+                }
+            }
+        }
+        return array($error, $native_code, $native_msg);
+    }
+
+    // }}}
+    // {{{ escape()
+
+    /**
+     * Quotes a string so it can be safely used in a query. It will quote
+     * the text so it can safely be used within a query.
+     *
+     * @param string $text the input string to quote
+     * @return string quoted string
+     * @access public
+     */
+    function escape($text)
+    {
+        return @sqlite_escape_string($text);
+    }
+
+    // }}}
+    // {{{ 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');
+        }
+        $query = 'BEGIN TRANSACTION '.$this->options['base_transaction_name'];
+        $result = $this->_doQuery($query, 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');
+        }
+        $query = 'COMMIT TRANSACTION '.$this->options['base_transaction_name'];
+        $result = $this->_doQuery($query, 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');
+        }
+        $query = 'ROLLBACK TRANSACTION '.$this->options['base_transaction_name'];
+        $result = $this->_doQuery($query, true);
+        if (PEAR::isError($result)) {
+            return $result;
+        }
+        $this->in_transaction = false;
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ getDatabaseFile()
+
+    /**
+     * Builds the string with path+dbname+extension
+     *
+     * @return string full database path+file
+     * @access protected
+     */
+    function _getDatabaseFile($database_name)
+    {
+        if ($database_name == '') {
+            return $database_name;
+        }
+        return $this->options['database_path'].$database_name.$this->options['database_extension'];
+    }
+
+    // }}}
+    // {{{ connect()
+
+    /**
+     * Connect to the database
+     *
+     * @return true on success, MDB2 Error Object on failure
+     **/
+    function connect()
+    {
+        $database_file = $this->_getDatabaseFile($this->database_name);
+        if (is_resource($this->connection)) {
+            if (count(array_diff($this->connected_dsn, $this->dsn)) == 0
+                && $this->connected_database_name == $database_file
+                && $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 (!empty($this->database_name)) {
+            if (!file_exists($database_file)) {
+                if (!touch($database_file)) {
+                    return $this->raiseError(MDB2_ERROR_NOT_FOUND);
+                }
+                if (!isset($this->dsn['mode'])
+                    || !is_numeric($this->dsn['mode'])
+                ) {
+                    $mode = 0644;
+                } else {
+                    $mode = octdec($this->dsn['mode']);
+                }
+                if (!chmod($database_file, $mode)) {
+                    return $this->raiseError(MDB2_ERROR_NOT_FOUND);
+                }
+                if (!file_exists($database_file)) {
+                    return $this->raiseError(MDB2_ERROR_NOT_FOUND);
+                }
+            }
+            if (!is_file($database_file)) {
+                return $this->raiseError(MDB2_ERROR_INVALID);
+            }
+            if (!is_readable($database_file)) {
+                return $this->raiseError(MDB2_ERROR_ACCESS_VIOLATION);
+            }
+
+            $connect_function = ($this->options['persistent'] ? 'sqlite_popen' : 'sqlite_open');
+            $php_errormsg = '';
+            @ini_set('track_errors', true);
+            $connection = @$connect_function($database_file);
+            @ini_restore('track_errors');
+            $this->_lasterror = isset($php_errormsg) ? $php_errormsg : '';
+            if (!$connection) {
+                return $this->raiseError(MDB2_ERROR_CONNECT_FAILED);
+            }
+            $this->connection = $connection;
+            $this->connected_dsn = $this->dsn;
+            $this->connected_database_name = $database_file;
+            $this->opened_persistent = $this->getoption('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 || $force) {
+                @sqlite_close($this->connection);
+            }
+            $this->connection = 0;
+        }
+        return MDB2_OK;
+    }
+
+    // }}}
+    // {{{ _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 MDB2_OK;
+            }
+            return null;
+        }
+
+        if (is_null($connection)) {
+            $error = $this->connect();
+            if (PEAR::isError($error)) {
+                return $error;
+            }
+            $connection = $this->connection;
+        }
+
+        $function = $this->options['result_buffering']
+            ? 'sqlite_query' : 'sqlite_unbuffered_query';
+        $php_errormsg = '';
+        ini_set('track_errors', true);
+        $result = @$function($query.';', $connection);
+        ini_restore('track_errors');
+        $this->_lasterror = isset($php_errormsg) ? $php_errormsg : '';
+
+        if (!$result) {
+            return $this->raiseError();
+        }
+
+        if ($isManip) {
+            return @sqlite_changes($connection);
+        }
+        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, $offset)
+    {
+        if ($this->options['portability'] & MDB2_PORTABILITY_DELETE_COUNT) {
+            if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) {
+                $query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/',
+                                      'DELETE FROM \1 WHERE 1=1', $query);
+            }
+        }
+        if ($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) {
+                $query .= " LIMIT $limit";
+            } else {
+                $query .= " LIMIT $offset,$limit";
+            }
+        }
+        return $query;
+    }
+
+
+    // }}}
+    // {{{ replace()
+
+    /**
+     * Execute a SQL REPLACE query. A REPLACE query is identical to a INSERT
+     * query, except that if there is already a row in the table with the same
+     * key field values, the REPLACE query just updates its values instead of
+     * inserting a new row.
+     *
+     * The REPLACE type of query does not make part of the SQL standards. Since
+     * practically only SQLite implements it natively, this type of query is
+     * emulated through this method for other DBMS using standard types of
+     * queries inside a transaction to assure the atomicity of the operation.
+     *
+     * @access public
+     *
+     * @param string $table name of the table on which the REPLACE query will
+     *  be executed.
+     * @param array $fields associative array that describes the fields and the
+     *  values that will be inserted or updated in the specified table. The
+     *  indexes of the array are the names of all the fields of the table. The
+     *  values of the array are also associative arrays that describe the
+     *  values and other properties of the table fields.
+     *
+     *  Here follows a list of field properties that need to be specified:
+     *
+     *    value:
+     *          Value to be assigned to the specified field. This value may be
+     *          of specified in database independent type format as this
+     *          function can perform the necessary datatype conversions.
+     *
+     *    Default:
+     *          this property is required unless the Null property
+     *          is set to 1.
+     *
+     *    type
+     *          Name of the type of the field. Currently, all types Metabase
+     *          are supported except for clob and blob.
+     *
+     *    Default: no type conversion
+     *
+     *    null
+     *          Boolean property that indicates that the value for this field
+     *          should be set to null.
+     *
+     *          The default value for fields missing in INSERT queries may be
+     *          specified the definition of a table. Often, the default value
+     *          is already null, but since the REPLACE may be emulated using
+     *          an UPDATE query, make sure that all fields of the table are
+     *          listed in this function argument array.
+     *
+     *    Default: 0
+     *
+     *    key
+     *          Boolean property that indicates that this field should be
+     *          handled as a primary key or at least as part of the compound
+     *          unique index of the table that will determine the row that will
+     *          updated if it exists or inserted a new row otherwise.
+     *
+     *          This function will fail if no key field is specified or if the
+     *          value of a key field is set to null because fields that are
+     *          part of unique index they may not be null.
+     *
+     *    Default: 0
+     *
+     * @return mixed MDB2_OK on success, a MDB2 error on failure
+     */
+    function replace($table, $fields)
+    {
+        $count = count($fields);
+        $query = $values = '';
+        $keys = $colnum = 0;
+        for (reset($fields); $colnum < $count; next($fields), $colnum++) {
+            $name = key($fields);
+            if ($colnum > 0) {
+                $query .= ',';
+                $values .= ',';
+            }
+            $query .= $name;
+            if (isset($fields[$name]['null']) && $fields[$name]['null']) {
+                $value = 'NULL';
+            } else {
+                $value = $this->quote($fields[$name]['value'], $fields[$name]['type']);
+            }
+            $values .= $value;
+            if (isset($fields[$name]['key']) && $fields[$name]['key']) {
+                if ($value === 'NULL') {
+                    return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
+                        'replace: key value '.$name.' may not be NULL');
+                }
+                $keys++;
+            }
+        }
+        if ($keys == 0) {
+            return $this->raiseError(MDB2_ERROR_CANNOT_REPLACE, null, null,
+                'replace: not specified which fields are keys');
+        }
+        $query = "REPLACE INTO $table ($query) VALUES ($values)";
+        $this->last_query = $query;
+        $this->debug($query, 'query');
+        return $this->_doQuery($query, true);
+    }
+
+    // }}}
+    // {{{ 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 = "INSERT INTO $sequence_name (".$this->options['seqcol_name'].") VALUES (NULL)";
+        $this->expectError(MDB2_ERROR_NOSUCHTABLE);
+        $result = $this->_doQuery($query, true);
+        $this->popExpect();
+        if (PEAR::isError($result)) {
+            if ($ondemand && $result->getCode() == MDB2_ERROR_NOSUCHTABLE) {
+                $this->loadModule('Manager');
+                // Since we are creating the sequence on demand
+                // we know the first id = 1 so initialize the
+                // sequence at 2
+                $result = $this->manager->createSequence($seq_name, 2);
+                if (PEAR::isError($result)) {
+                    return $this->raiseError(MDB2_ERROR, null, null,
+                        'nextID: on demand sequence '.$seq_name.' could not be created');
+                } else {
+                    // First ID of a newly created sequence is 1
+                    return 1;
+                }
+            }
+            return $result;
+        }
+        $value = @sqlite_last_insert_rowid($this->connection);
+        if (is_numeric($value)
+            && PEAR::isError($this->_doQuery("DELETE FROM $sequence_name WHERE ".$this->options['seqcol_name']." < $value", true))
+        ) {
+            $this->warnings[] = 'nextID: could not delete previous sequence table values from '.$seq_name;
+        }
+        return $value;
+    }
+
+    // }}}
+    // {{{ getAfterID()
+
+    /**
+     * returns the autoincrement ID if supported or $id
+     *
+     * @param mixed $id value as returned by getBeforeId()
+     * @param string $table name of the table into which a new row was inserted
+     * @return mixed MDB2 Error Object or id
+     * @access public
+     */
+    function getAfterID($id, $table)
+    {
+        $this->loadModule('Native');
+        return $this->native->getInsertID();
+    }
+
+    // }}}
+    // {{{ 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 $this->queryOne("SELECT MAX(".$this->options['seqcol_name'].") FROM $sequence_name", 'integer');
+    }
+}
+
+class MDB2_Result_sqlite 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) {
+            $row = @sqlite_fetch_array($this->result, SQLITE_ASSOC);
+            if (is_array($row)
+                && $this->db->options['portability'] & MDB2_PORTABILITY_LOWERCASE
+            ) {
+                $row = array_change_key_case($row, CASE_LOWER);
+            }
+        } else {
+           $row = @sqlite_fetch_array($this->result, SQLITE_NUM);
+        }
+        if (!$row) {
+            if (is_null($this->result)) {
+                return $this->db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
+                    'fetchRow: resultset has already been freed');
+            }
+            return null;
+        }
+        if ($this->db->options['portability'] & MDB2_PORTABILITY_EMPTY_TO_NULL) {
+            $this->db->_convertEmptyArrayValuesToNull($row);
+        }
+        if (isset($this->values)) {
+            $this->_assignBindColumns($row);
+        }
+        if (isset($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++) {
+            $column_name = @sqlite_field_name($this->result, $column);
+            $columns[$column_name] = $column;
+        }
+        if ($this->db->options['portability'] & MDB2_PORTABILITY_LOWERCASE) {
+            $columns = array_change_key_case($columns, CASE_LOWER);
+        }
+        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()
+    {
+        $cols = @sqlite_num_fields($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;
+    }
+}
+
+class MDB2_BufferedResult_sqlite extends MDB2_Result_sqlite
+{
+    // {{{ 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 (!@sqlite_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()
+    {
+        $rows = @sqlite_num_rows($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_sqlite extends MDB2_Statement_Common
+{
+
+}
+
+?>
\ No newline at end of file