odbc.php

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        return @odbc_free_result($result);
    }

    // }}}
    // {{{ numCols()

    function numCols($result)
    {
        $cols = @odbc_num_fields($result);
        if (!$cols) {
            return $this->odbcRaiseError();
        }
        return $cols;
    }

    // }}}
    // {{{ affectedRows()

    /**
     * Returns the number of rows affected by a manipulative query
     * (INSERT, DELETE, UPDATE)
     * @return mixed int affected rows, 0 when non manip queries or
     *               DB error on error
     */
    function affectedRows()
    {
        if (empty($this->manip_result)) {  // In case of SELECT stms
            return 0;
        }
        $nrows = @odbc_num_rows($this->manip_result);
        if ($nrows == -1) {
            return $this->odbcRaiseError();
        }
        return $nrows;
    }

    // }}}
    // {{{ numRows()

    /**
     * ODBC may or may not support counting rows in the result set of
     * SELECTs.
     *
     * @param $result the odbc result resource
     * @return the number of rows, or 0
     */
    function numRows($result)
    {
        $nrows = @odbc_num_rows($result);
        if ($nrows == -1) {
            return $this->odbcRaiseError(DB_ERROR_UNSUPPORTED);
        }
        return $nrows;
    }

    // }}}
    // {{{ quoteIdentifier()

    /**
     * Quote a string so it can be safely used as a table / column name
     *
     * Quoting style depends on which dbsyntax was passed in the DSN.
     *
     * Use 'mssql' as the dbsyntax in the DB DSN only if you've unchecked
     * "Use ANSI quoted identifiers" when setting up the ODBC data source.
     *
     * @param string $str  identifier name to be quoted
     *
     * @return string  quoted identifier string
     *
     * @since 1.6.0
     * @access public
     */
    function quoteIdentifier($str)
    {
        switch ($this->dsn['dbsyntax']) {
            case 'access':
                return '[' . $str . ']';
            case 'mssql':
            case 'sybase':
                return '[' . str_replace(']', ']]', $str) . ']';
            case 'mysql':
            case 'mysqli':
                return '`' . $str . '`';
            default:
                return '"' . str_replace('"', '""', $str) . '"';
        }
    }

    // }}}
    // {{{ quote()

    /**
     * @deprecated  Deprecated in release 1.6.0
     * @internal
     */
    function quote($str) {
        return $this->quoteSmart($str);
    }

    // }}}
    // {{{ errorNative()

    /**
     * Get the native error code of the last error (if any) that
     * occured on the current connection.
     *
     * @access public
     *
     * @return int ODBC error code
     */
    function errorNative()
    {
        if (!isset($this->connection) || !is_resource($this->connection)) {
            return @odbc_error() . ' ' . @odbc_errormsg();
        }
        return @odbc_error($this->connection) . ' ' . @odbc_errormsg($this->connection);
    }

    // }}}
    // {{{ nextId()

    /**
     * Returns the next free id in a sequence
     *
     * @param string  $seq_name  name of the sequence
     * @param boolean $ondemand  when true, the seqence is automatically
     *                           created if it does not exist
     *
     * @return int  the next id number in the sequence.  DB_Error if problem.
     *
     * @internal
     * @see DB_common::nextID()
     * @access public
     */
    function nextId($seq_name, $ondemand = true)
    {
        $seqname = $this->getSequenceName($seq_name);
        $repeat = 0;
        do {
            $this->pushErrorHandling(PEAR_ERROR_RETURN);
            $result = $this->query("update ${seqname} set id = id + 1");
            $this->popErrorHandling();
            if ($ondemand && DB::isError($result) &&
                $result->getCode() == DB_ERROR_NOSUCHTABLE) {
                $repeat = 1;
                $this->pushErrorHandling(PEAR_ERROR_RETURN);
                $result = $this->createSequence($seq_name);
                $this->popErrorHandling();
                if (DB::isError($result)) {
                    return $this->raiseError($result);
                }
                $result = $this->query("insert into ${seqname} (id) values(0)");
            } else {
                $repeat = 0;
            }
        } while ($repeat);

        if (DB::isError($result)) {
            return $this->raiseError($result);
        }

        $result = $this->query("select id from ${seqname}");
        if (DB::isError($result)) {
            return $result;
        }

        $row = $result->fetchRow(DB_FETCHMODE_ORDERED);
        if (DB::isError($row || !$row)) {
            return $row;
        }

        return $row[0];
    }

    /**
     * Creates a new sequence
     *
     * @param string $seq_name  name of the new sequence
     *
     * @return int  DB_OK on success.  A DB_Error object is returned if
     *              problems arise.
     *
     * @internal
     * @see DB_common::createSequence()
     * @access public
     */
    function createSequence($seq_name)
    {
        $seqname = $this->getSequenceName($seq_name);
        return $this->query("CREATE TABLE ${seqname} ".
                            '(id integer NOT NULL,'.
                            ' PRIMARY KEY(id))');
    }

    // }}}
    // {{{ dropSequence()

    /**
     * Deletes a sequence
     *
     * @param string $seq_name  name of the sequence to be deleted
     *
     * @return int  DB_OK on success.  DB_Error if problems.
     *
     * @internal
     * @see DB_common::dropSequence()
     * @access public
     */
    function dropSequence($seq_name)
    {
        $seqname = $this->getSequenceName($seq_name);
        return $this->query("DROP TABLE ${seqname}");
    }

    // }}}
    // {{{ autoCommit()

    function autoCommit($onoff = false)
    {
        if (!@odbc_autocommit($this->connection, $onoff)) {
            return $this->odbcRaiseError();
        }
        return DB_OK;
    }

    // }}}
    // {{{ commit()

    function commit()
    {
        if (!@odbc_commit($this->connection)) {
            return $this->odbcRaiseError();
        }
        return DB_OK;
    }

    // }}}
    // {{{ rollback()

    function rollback()
    {
        if (!@odbc_rollback($this->connection)) {
            return $this->odbcRaiseError();
        }
        return DB_OK;
    }

    // }}}
    // {{{ odbcRaiseError()

    /**
     * Gather information about an error, then use that info to create a
     * DB error object and finally return that object.
     *
     * @param  integer  $errno  PEAR error number (usually a DB constant) if
     *                          manually raising an error
     * @return object  DB error object
     * @see errorNative()
     * @see DB_common::errorCode()
     * @see DB_common::raiseError()
     */
    function odbcRaiseError($errno = null)
    {
        if ($errno === null) {
            switch ($this->dbsyntax) {
                case 'access':
                    if ($this->options['portability'] & DB_PORTABILITY_ERRORS) {
                        $this->errorcode_map['07001'] = DB_ERROR_NOSUCHFIELD;
                    } else {
                        // Doing this in case mode changes during runtime.
                        $this->errorcode_map['07001'] = DB_ERROR_MISMATCH;
                    }
            }
            $errno = $this->errorCode(odbc_error($this->connection));
        }
        return $this->raiseError($errno, null, null, null,
                        $this->errorNative());
    }

    // }}}

}

/*
 * Local variables:
 * tab-width: 4
 * c-basic-offset: 4
 * End:
 */

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