Lazy Module

This XQuery Module contains functions for handling streamable items.

In contrast to conventional XQuery items, streamable items may take up much less space, because they only contain a reference to the actual data. The data will not be retrieved until the item is required, e.g. if data needs to be serialized or processed by another expression.

Conventions

All functions in this module are assigned to the http://basex.org/modules/stream namespace, which is statically bound to the stream prefix.
All errors are assigned to the http://basex.org/errors namespace, which is statically bound to the bxerr prefix.

Functions

stream:materialize

Signatures	stream:materialize($item as item()) as item()
Summary	Returns a materialized instance of the specified $item. If an item is streamable, its content will be retrieved, and a new item containing its data will be returned. Other, non-streamable items will simply be returned.

stream:is-streamable

Signatures	stream:is-streamable($item as item()) as item()
Summary	Checks if the specified $item is streamable.

Changelog

This module was introduced with Version 7.7.