17.9.2. Virtuoso extensions

The following settable properties are available to the execute request:

direction - one of forward, backward

skip - integer

n-rows integer

bookmark-from - string

retrieve-row-count - string

The direction indicates in which direction the cursor moves from the bookmark-from. If there is no bookmark-from, the query is always forward from the start of the evaluation.

skip allows skipping a number of rows in the selected direction. n-rows gives the number of rows to return after the skip. Fewer rows will be returned if the evaluation does not extend this far.

The bookmark is an opaque string, acceptable values are values that have been in a bookmark element of a result row.

return-bookmark boolean

If true, a bookmark element is added to each row of the result set.

A simple request / response is added to samples.

The retrieve-row-count element of the query options must be true for rowcount returning to be enabled.

If retrieve-row-count is specified, the response has a row-count element with a text value containing the total result set size of the query, irrespective of the specified window of rows retrieved. Note that for large result sets getting the row count can be prohibitively expensive.


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