Thanks, Rob! Sounded like adding "limit 1" won't hurt. On Dec 11, 2013 11:27 AM, "Rob Vesse" <[email protected]> wrote:
> Hard to say without seeing a complete example query > > The ARQ query engine which TDB uses streams results wherever possible so > if there is only one results in principal adding LIMIT 1 won't change much. > > That being said there are certain query optimisations that require a LIMIT > to be present so depending on the query adding the LIMIT 1 may result in a > different query plan which may be marginally more efficient. > > Rob > > On 11/12/2013 17:51, "Charles Li" <[email protected]> wrote: > > >Hi, everyone! > > > >I have a sparql query running by Jena code (2.10.1) against a TDB store. > >If > >I know for sure the query will always return one record, will the use of > >"limit 1" in the query string improve performance statistically? > > > >Thanks! > > > > >
