ifx.php

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    function numRows($result)
    {
        return $this->raiseError(DB_ERROR_NOT_CAPABLE);
    }

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

    /**
     * Get the number of columns in a result set.
     *
     * @param $result Informix result identifier
     *
     * @return int the number of columns per row in $result
     */
    function numCols($result)
    {
        if (!$cols = @ifx_num_fields($result)) {
            return $this->ifxraiseError();
        }
        return $cols;
    }

    // }}}
    // {{{ freeResult()

    /**
     * Free the internal resources associated with $result.
     *
     * @param $result Informix result identifier
     *
     * @return bool true on success, false if $result is invalid
     */
    function freeResult($result)
    {
        return @ifx_free_result($result);
    }

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

    /**
     * Enable/disable automatic commits
     */
    function autoCommit($onoff = true)
    {
        // XXX if $this->transaction_opcount > 0, we should probably
        // issue a warning here.
        $this->autocommit = $onoff ? true : false;
        return DB_OK;
    }

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

    /**
     * Commit the current transaction.
     */
    function commit()
    {
        if ($this->transaction_opcount > 0) {
            $result = @ifx_query('COMMIT WORK', $this->connection);
            $this->transaction_opcount = 0;
            if (!$result) {
                return $this->ifxRaiseError();
            }
        }
        return DB_OK;
    }

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

    /**
     * Roll back (undo) the current transaction.
     */
    function rollback()
    {
        if ($this->transaction_opcount > 0) {
            $result = @ifx_query('ROLLBACK WORK', $this->connection);
            $this->transaction_opcount = 0;
            if (!$result) {
                return $this->ifxRaiseError();
            }
        }
        return DB_OK;
    }

    // }}}
    // {{{ ifxraiseError()

    /**
     * Gather information about an error, then use that info to create a
     * DB error object and finally return that object.
     *
     * @param  integer  $errno  PEAR error number (usually a DB constant) if
     *                          manually raising an error
     * @return object  DB error object
     * @see errorNative()
     * @see errorCode()
     * @see DB_common::raiseError()
     */
    function ifxraiseError($errno = null)
    {
        if ($errno === null) {
            $errno = $this->errorCode(ifx_error());
        }

        return $this->raiseError($errno, null, null, null,
                            $this->errorNative());
    }

    // }}}
    // {{{ errorCode()

    /**
     * Map native error codes to DB's portable ones.
     *
     * Requires that the DB implementation's constructor fills
     * in the <var>$errorcode_map</var> property.
     *
     * @param  string  $nativecode  error code returned by the database
     * @return int a portable DB error code, or DB_ERROR if this DB
     * implementation has no mapping for the given error code.
     */
    function errorCode($nativecode)
    {
        if (ereg('SQLCODE=(.*)]', $nativecode, $match)) {
            $code = $match[1];
            if (isset($this->errorcode_map[$code])) {
                return $this->errorcode_map[$code];
            }
        }
        return DB_ERROR;
    }

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

    /**
     * Get the native error message of the last error (if any) that
     * occured on the current connection.
     *
     * @return int native Informix error code
     */
    function errorNative()
    {
        return @ifx_error() . ' ' . @ifx_errormsg();
    }

    // }}}
    // {{{ getSpecialQuery()

    /**
     * Returns the query needed to get some backend info
     * @param string $type What kind of info you want to retrieve
     * @return string The SQL query string
     */
    function getSpecialQuery($type)
    {
        switch ($type) {
            case 'tables':
                return 'select tabname from systables where tabid >= 100';
            default:
                return null;
        }
    }

    // }}}
    // {{{ tableInfo()

    /**
     * Returns information about a table or a result set.
     *
     * NOTE: only supports 'table' if <var>$result</var> is a table name.
     *
     * If analyzing a query result and the result has duplicate field names,
     * an error will be raised saying
     * <samp>can't distinguish duplicate field names</samp>.
     *
     * @param object|string  $result  DB_result object from a query or a
     *                                string containing the name of a table
     * @param int            $mode    a valid tableInfo mode
     * @return array  an associative array with the information requested
     *                or an error object if something is wrong
     * @access public
     * @internal
     * @since 1.6.0
     * @see DB_common::tableInfo()
     */
    function tableInfo($result, $mode = null)
    {
        if (isset($result->result)) {
            /*
             * Probably received a result object.
             * Extract the result resource identifier.
             */
            $id = $result->result;
            $got_string = false;
        } elseif (is_string($result)) {
            /*
             * Probably received a table name.
             * Create a result resource identifier.
             */
            $id = @ifx_query("SELECT * FROM $result WHERE 1=0",
                             $this->connection);
            $got_string = true;
        } else {
            /*
             * Probably received a result resource identifier.
             * Copy it.
             */
            $id = $result;
            $got_string = false;
        }

        if (!is_resource($id)) {
            return $this->ifxRaiseError(DB_ERROR_NEED_MORE_DATA);
        }

        $flds = @ifx_fieldproperties($id);
        $count = @ifx_num_fields($id);

        if (count($flds) != $count) {
            return $this->raiseError("can't distinguish duplicate field names");
        }

        if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
            $case_func = 'strtolower';
        } else {
            $case_func = 'strval';
        }

        $i = 0;
        // made this IF due to performance (one if is faster than $count if's)
        if (!$mode) {
            foreach ($flds as $key => $value) {
                $props = explode(';', $value);

                $res[$i]['table'] = $got_string ? $case_func($result) : '';
                $res[$i]['name']  = $case_func($key);
                $res[$i]['type']  = $props[0];
                $res[$i]['len']   = $props[1];
                $res[$i]['flags'] = $props[4] == 'N' ? 'not_null' : '';
                $i++;
            }

        } else { // full
            $res['num_fields'] = $count;

            foreach ($flds as $key => $value) {
                $props = explode(';', $value);

                $res[$i]['table'] = $got_string ? $case_func($result) : '';
                $res[$i]['name']  = $case_func($key);
                $res[$i]['type']  = $props[0];
                $res[$i]['len']   = $props[1];
                $res[$i]['flags'] = $props[4] == 'N' ? 'not_null' : '';

                if ($mode & DB_TABLEINFO_ORDER) {
                    $res['order'][$res[$i]['name']] = $i;
                }
                if ($mode & DB_TABLEINFO_ORDERTABLE) {
                    $res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
                }
                $i++;
            }
        }

        // free the result only if we were called on a table
        if ($got_string) {
            @ifx_free_result($id);
        }
        return $res;
    }

    // }}}

}

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

?>