Re: position-anchored queries
Thanks Mikhail; I see SpanPositionRangeQuery, SpanFirstQuery, and thanks Adrien for confirming there is no max position. I have a legacy system that indexes anchor tokens at beginning and end, and am checking if there is a better approach. It seems as if we could get rid of the start token, but we may need to keep the end token to support that feature. -Mike On Thu, Mar 21, 2019 at 9:10 AM Adrien Grand wrote: > We don't track of the maximum position per doc. One way to do > ends-with queries would be to write a token filter that emits a > special token at the end of the wrapped token stream and use it as the > last token of a phrase query. > > On Thu, Mar 21, 2019 at 1:29 PM Michael Sokolov > wrote: > > > > Hi, if I want to write a begins-with, ends-with, or exact-match style > > query; like a phrase query, but anchored to the beginning of a field, the > > end, or both, is there a generally-accepted best way? I can see how to > > maybe create a positional query that specifies the exact position for > each > > term (at least in theory -- I'm not sure if there is a Query that does > > this?) but do we keep track of max(position, field, doc) so I can know > that > > there are not any subsequent terms in the field? > > > > -Mike > > > > -- > Adrien > > - > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > >
Re: position-anchored queries
We don't track of the maximum position per doc. One way to do ends-with queries would be to write a token filter that emits a special token at the end of the wrapped token stream and use it as the last token of a phrase query. On Thu, Mar 21, 2019 at 1:29 PM Michael Sokolov wrote: > > Hi, if I want to write a begins-with, ends-with, or exact-match style > query; like a phrase query, but anchored to the beginning of a field, the > end, or both, is there a generally-accepted best way? I can see how to > maybe create a positional query that specifies the exact position for each > term (at least in theory -- I'm not sure if there is a Query that does > this?) but do we keep track of max(position, field, doc) so I can know that > there are not any subsequent terms in the field? > > -Mike -- Adrien - To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
Re: position-anchored queries
Hello, Michael. I'm aware of in XML Query Parser. On Thu, Mar 21, 2019 at 3:29 PM Michael Sokolov wrote: > Hi, if I want to write a begins-with, ends-with, or exact-match style > query; like a phrase query, but anchored to the beginning of a field, the > end, or both, is there a generally-accepted best way? I can see how to > maybe create a positional query that specifies the exact position for each > term (at least in theory -- I'm not sure if there is a Query that does > this?) but do we keep track of max(position, field, doc) so I can know that > there are not any subsequent terms in the field? > > -Mike > -- Sincerely yours Mikhail Khludnev
position-anchored queries
Hi, if I want to write a begins-with, ends-with, or exact-match style query; like a phrase query, but anchored to the beginning of a field, the end, or both, is there a generally-accepted best way? I can see how to maybe create a positional query that specifies the exact position for each term (at least in theory -- I'm not sure if there is a Query that does this?) but do we keep track of max(position, field, doc) so I can know that there are not any subsequent terms in the field? -Mike
