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+<?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
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-01 01:48:47 +0000