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Posted to user@lucenenet.apache.org by Haberl Norbert <No...@ssi-schaefer.com> on 2020/06/26 07:02:38 UTC
Infix search possible in Lucene
Is there a way to perform efficient *xyz* queries in Lucene?
I see a lot of suggesters in the src but no docs. Have read Mike's posts about autocomplete but this is based on prefix searches.
Best regards,
Norbert Haberl | Software Engineer - Global Tools Development | Customer Service & Support
Phone +43 316 6096 - 8435 | Mobile +43 676 8766 - 8435
SSI SCHÄFER | SSI Schäfer Automation GmbH | Fischeraustraße 27 | 8051 Graz | Austria
Norbert.Haberl@ssi-schaefer.com<ma...@ssi-schaefer.com>
Website<http://www.ssi-schaefer.de/en> | Blog<http://www.ssi-schaefer.de/blog/en> | YouTube<http://youtube.com/warehouselogistics> | Facebook<http://facebook.com/SSI.SCHAEFER.EN>
AW: Infix search possible in Lucene
Posted by Haberl Norbert <No...@ssi-schaefer.com>.
Yeah, that is I was thinking about!
Try to figure out a way
-----Ursprüngliche Nachricht-----
Von: Erik Hatcher <er...@gmail.com>
Gesendet: Freitag, 26. Juni 2020 11:48
An: user@lucenenet.apache.org
Betreff: Re: Infix search possible in Lucene
Many of our customers use a query based typeahead/autosuggest Lucene index (via Solr). It’s based largely on ngrams and edge ngrams. Using standard lucene querying to boost and rank things appropriately. I’m not talking about any “suggester” APIs. Just plain queries on an ngrammed inverted index.
Erik
> On Jun 26, 2020, at 05:30, Haberl Norbert <No...@ssi-schaefer.com> wrote:
>
> Yes I know, Postgres uses Trigrams which are indexed by an inverted index and therefore improves search performance.
> But there is no relevance or scoring and it's hard to make TOP n queries.
>
> Thought lucene has any index structure which makes life easier for
> autocompletes 😊
> In Postgres there is a project called RUM index which stores additional stats into nodes which allows search for TOP n entries.
>
> Anyway, if there is no type of index in lucene I will go ahead
>
> -----Ursprüngliche Nachricht-----
> Von: Jens Melgaard <Je...@Systematic.com.INVALID>
> Gesendet: Freitag, 26. Juni 2020 10:52
> An: user@lucenenet.apache.org
> Betreff: RE: Infix search possible in Lucene
>
> I guess the most direct equivalent to SQL LIKE %xyz% is just a Wildcard search on top of non-analyzed fields (requires you to allow leading wildcards), so search for *xyz*. However, just like in SQL, doing a LIKE %xyz or LIKE %xyz% - a search for *xyz or *xyz* results in a full index scan which is just not very efficient in any of the two environments, and you asked for an efficient way after all.
>
> One very simple trick from that arena is to simply index the same term in reverse as well and then perform searches that has leading wildcards on that.
> That would bring us towards something like: "field: xyz* AND field_reverse: zyx*". Which could be somewhat more digestible compared to ngrams.
>
> Remember though, Lucene is a different kind of beast, the above is very much taking a "SQL mindset" and forcing that down over Lucene. That will not go very well in all cases.
>
>
> Kind regards
>
> Jens Melgaard
> Architect
>
> Systematic A/S
> Søren Frichs Vej 39
> 8000 Aarhus C
> Denmark
>
> Mobile: +45 4196 5119
> Jens.Melgaard@Systematic.com
>
> https://systematic.com/defence/defence-newsletter
> https://www.linkedin.com/showcase/systematic-defence/
> -----Original Message-----
> From: Haberl Norbert <No...@ssi-schaefer.com>
> Sent: 26. juni 2020 10:10
> To: user@lucenenet.apache.org
> Subject: AW: Infix search possible in Lucene
>
> [EXTERNAL]
>
> Thanks Shad ... that's using prefix search within a given phrase
> (which is perfect if you are looking for book titles or so) I need a
> contaions search for autocompletes (mostly single words) -> an Sql
> equivalent to LIKE %xyz%
>
> Wondering that lucene is not capable of this functionality.
> I have seen the freetext suggester but there is no scoring and acts mostly as a fallback.
>
> -----Ursprüngliche Nachricht-----
> Von: Shad Storhaug <sh...@shadstorhaug.com>
> Gesendet: Freitag, 26. Juni 2020 09:40
> An: user@lucenenet.apache.org
> Betreff: RE: Infix search possible in Lucene
>
> Would using the AnalyzingInfixSuggester help?
>
> https://lucenenet.apache.org/docs/4.8.0-beta00008/api/Lucene.Net.Sugge
> st/Lucene.Net.Search.Suggest.Analyzing.AnalyzingInfixSuggester.html
>
> -----Original Message-----
> From: Haberl Norbert <No...@ssi-schaefer.com>
> Sent: Friday, June 26, 2020 2:36 PM
> To: user@lucenenet.apache.org
> Subject: AW: Infix search possible in Lucene
>
> Any details ?
>
> -----Ursprüngliche Nachricht-----
> Von: Erik Hatcher <er...@gmail.com>
> Gesendet: Freitag, 26. Juni 2020 09:10
> An: user@lucenenet.apache.org
> Betreff: Re: Infix search possible in Lucene
>
> Yes. This can be achieved by indexing ngrams of each word.
>
> Erik
>
>> On Jun 26, 2020, at 03:03, Haberl Norbert <No...@ssi-schaefer.com> wrote:
>>
>> Is there a way to perform efficient *xyz* queries in Lucene?
>> I see a lot of suggesters in the src but no docs. Have read Mike's posts about autocomplete but this is based on prefix searches.
>>
>> Best regards,
>> Norbert Haberl | Software Engineer - Global Tools Development |
>> Customer Service & Support Phone +43 316 6096 - 8435 | Mobile +43 676
>> 8766 - 8435 SSI SCHÄFER | SSI Schäfer Automation GmbH |
>> Fischeraustraße 27 | 8051 Graz | Austria
>>
>> Norbert.Haberl@ssi-schaefer.com<mailto:Norbert.Haberl@ssi-schaefer.co
>> m
>>>
>>
>> Website<http://www.ssi-schaefer.de/en> |
>> Blog<http://www.ssi-schaefer.de/blog/en> |
>> YouTube<http://youtube.com/warehouselogistics> |
>> Facebook<http://facebook.com/SSI.SCHAEFER.EN>
>>
Re: Infix search possible in Lucene
Posted by Erik Hatcher <er...@gmail.com>.
Many of our customers use a query based typeahead/autosuggest Lucene index (via Solr). It’s based largely on ngrams and edge ngrams. Using standard lucene querying to boost and rank things appropriately. I’m not talking about any “suggester” APIs. Just plain queries on an ngrammed inverted index.
Erik
> On Jun 26, 2020, at 05:30, Haberl Norbert <No...@ssi-schaefer.com> wrote:
>
> Yes I know, Postgres uses Trigrams which are indexed by an inverted index and therefore improves search performance.
> But there is no relevance or scoring and it's hard to make TOP n queries.
>
> Thought lucene has any index structure which makes life easier for autocompletes 😊
> In Postgres there is a project called RUM index which stores additional stats into nodes which allows search for TOP n entries.
>
> Anyway, if there is no type of index in lucene I will go ahead
>
> -----Ursprüngliche Nachricht-----
> Von: Jens Melgaard <Je...@Systematic.com.INVALID>
> Gesendet: Freitag, 26. Juni 2020 10:52
> An: user@lucenenet.apache.org
> Betreff: RE: Infix search possible in Lucene
>
> I guess the most direct equivalent to SQL LIKE %xyz% is just a Wildcard search on top of non-analyzed fields (requires you to allow leading wildcards), so search for *xyz*. However, just like in SQL, doing a LIKE %xyz or LIKE %xyz% - a search for *xyz or *xyz* results in a full index scan which is just not very efficient in any of the two environments, and you asked for an efficient way after all.
>
> One very simple trick from that arena is to simply index the same term in reverse as well and then perform searches that has leading wildcards on that.
> That would bring us towards something like: "field: xyz* AND field_reverse: zyx*". Which could be somewhat more digestible compared to ngrams.
>
> Remember though, Lucene is a different kind of beast, the above is very much taking a "SQL mindset" and forcing that down over Lucene. That will not go very well in all cases.
>
>
> Kind regards
>
> Jens Melgaard
> Architect
>
> Systematic A/S
> Søren Frichs Vej 39
> 8000 Aarhus C
> Denmark
>
> Mobile: +45 4196 5119
> Jens.Melgaard@Systematic.com
>
> https://systematic.com/defence/defence-newsletter
> https://www.linkedin.com/showcase/systematic-defence/
> -----Original Message-----
> From: Haberl Norbert <No...@ssi-schaefer.com>
> Sent: 26. juni 2020 10:10
> To: user@lucenenet.apache.org
> Subject: AW: Infix search possible in Lucene
>
> [EXTERNAL]
>
> Thanks Shad ... that's using prefix search within a given phrase (which is perfect if you are looking for book titles or so) I need a contaions search for autocompletes (mostly single words) -> an Sql equivalent to LIKE %xyz%
>
> Wondering that lucene is not capable of this functionality.
> I have seen the freetext suggester but there is no scoring and acts mostly as a fallback.
>
> -----Ursprüngliche Nachricht-----
> Von: Shad Storhaug <sh...@shadstorhaug.com>
> Gesendet: Freitag, 26. Juni 2020 09:40
> An: user@lucenenet.apache.org
> Betreff: RE: Infix search possible in Lucene
>
> Would using the AnalyzingInfixSuggester help?
>
> https://lucenenet.apache.org/docs/4.8.0-beta00008/api/Lucene.Net.Suggest/Lucene.Net.Search.Suggest.Analyzing.AnalyzingInfixSuggester.html
>
> -----Original Message-----
> From: Haberl Norbert <No...@ssi-schaefer.com>
> Sent: Friday, June 26, 2020 2:36 PM
> To: user@lucenenet.apache.org
> Subject: AW: Infix search possible in Lucene
>
> Any details ?
>
> -----Ursprüngliche Nachricht-----
> Von: Erik Hatcher <er...@gmail.com>
> Gesendet: Freitag, 26. Juni 2020 09:10
> An: user@lucenenet.apache.org
> Betreff: Re: Infix search possible in Lucene
>
> Yes. This can be achieved by indexing ngrams of each word.
>
> Erik
>
>> On Jun 26, 2020, at 03:03, Haberl Norbert <No...@ssi-schaefer.com> wrote:
>>
>> Is there a way to perform efficient *xyz* queries in Lucene?
>> I see a lot of suggesters in the src but no docs. Have read Mike's posts about autocomplete but this is based on prefix searches.
>>
>> Best regards,
>> Norbert Haberl | Software Engineer - Global Tools Development |
>> Customer Service & Support Phone +43 316 6096 - 8435 | Mobile +43 676
>> 8766 - 8435 SSI SCHÄFER | SSI Schäfer Automation GmbH |
>> Fischeraustraße 27 | 8051 Graz | Austria
>>
>> Norbert.Haberl@ssi-schaefer.com<mailto:Norbert.Haberl@ssi-schaefer.com
>>>
>>
>> Website<http://www.ssi-schaefer.de/en> |
>> Blog<http://www.ssi-schaefer.de/blog/en> |
>> YouTube<http://youtube.com/warehouselogistics> |
>> Facebook<http://facebook.com/SSI.SCHAEFER.EN>
>>
AW: Infix search possible in Lucene
Posted by Haberl Norbert <No...@ssi-schaefer.com>.
Yes I know, Postgres uses Trigrams which are indexed by an inverted index and therefore improves search performance.
But there is no relevance or scoring and it's hard to make TOP n queries.
Thought lucene has any index structure which makes life easier for autocompletes 😊
In Postgres there is a project called RUM index which stores additional stats into nodes which allows search for TOP n entries.
Anyway, if there is no type of index in lucene I will go ahead
-----Ursprüngliche Nachricht-----
Von: Jens Melgaard <Je...@Systematic.com.INVALID>
Gesendet: Freitag, 26. Juni 2020 10:52
An: user@lucenenet.apache.org
Betreff: RE: Infix search possible in Lucene
I guess the most direct equivalent to SQL LIKE %xyz% is just a Wildcard search on top of non-analyzed fields (requires you to allow leading wildcards), so search for *xyz*. However, just like in SQL, doing a LIKE %xyz or LIKE %xyz% - a search for *xyz or *xyz* results in a full index scan which is just not very efficient in any of the two environments, and you asked for an efficient way after all.
One very simple trick from that arena is to simply index the same term in reverse as well and then perform searches that has leading wildcards on that.
That would bring us towards something like: "field: xyz* AND field_reverse: zyx*". Which could be somewhat more digestible compared to ngrams.
Remember though, Lucene is a different kind of beast, the above is very much taking a "SQL mindset" and forcing that down over Lucene. That will not go very well in all cases.
Kind regards
Jens Melgaard
Architect
Systematic A/S
Søren Frichs Vej 39
8000 Aarhus C
Denmark
Mobile: +45 4196 5119
Jens.Melgaard@Systematic.com
https://systematic.com/defence/defence-newsletter
https://www.linkedin.com/showcase/systematic-defence/
-----Original Message-----
From: Haberl Norbert <No...@ssi-schaefer.com>
Sent: 26. juni 2020 10:10
To: user@lucenenet.apache.org
Subject: AW: Infix search possible in Lucene
[EXTERNAL]
Thanks Shad ... that's using prefix search within a given phrase (which is perfect if you are looking for book titles or so) I need a contaions search for autocompletes (mostly single words) -> an Sql equivalent to LIKE %xyz%
Wondering that lucene is not capable of this functionality.
I have seen the freetext suggester but there is no scoring and acts mostly as a fallback.
-----Ursprüngliche Nachricht-----
Von: Shad Storhaug <sh...@shadstorhaug.com>
Gesendet: Freitag, 26. Juni 2020 09:40
An: user@lucenenet.apache.org
Betreff: RE: Infix search possible in Lucene
Would using the AnalyzingInfixSuggester help?
https://lucenenet.apache.org/docs/4.8.0-beta00008/api/Lucene.Net.Suggest/Lucene.Net.Search.Suggest.Analyzing.AnalyzingInfixSuggester.html
-----Original Message-----
From: Haberl Norbert <No...@ssi-schaefer.com>
Sent: Friday, June 26, 2020 2:36 PM
To: user@lucenenet.apache.org
Subject: AW: Infix search possible in Lucene
Any details ?
-----Ursprüngliche Nachricht-----
Von: Erik Hatcher <er...@gmail.com>
Gesendet: Freitag, 26. Juni 2020 09:10
An: user@lucenenet.apache.org
Betreff: Re: Infix search possible in Lucene
Yes. This can be achieved by indexing ngrams of each word.
Erik
> On Jun 26, 2020, at 03:03, Haberl Norbert <No...@ssi-schaefer.com> wrote:
>
> Is there a way to perform efficient *xyz* queries in Lucene?
> I see a lot of suggesters in the src but no docs. Have read Mike's posts about autocomplete but this is based on prefix searches.
>
> Best regards,
> Norbert Haberl | Software Engineer - Global Tools Development |
> Customer Service & Support Phone +43 316 6096 - 8435 | Mobile +43 676
> 8766 - 8435 SSI SCHÄFER | SSI Schäfer Automation GmbH |
> Fischeraustraße 27 | 8051 Graz | Austria
>
> Norbert.Haberl@ssi-schaefer.com<mailto:Norbert.Haberl@ssi-schaefer.com
> >
>
> Website<http://www.ssi-schaefer.de/en> |
> Blog<http://www.ssi-schaefer.de/blog/en> |
> YouTube<http://youtube.com/warehouselogistics> |
> Facebook<http://facebook.com/SSI.SCHAEFER.EN>
>
RE: Infix search possible in Lucene
Posted by Jens Melgaard <Je...@Systematic.com.INVALID>.
I guess the most direct equivalent to SQL LIKE %xyz% is just a Wildcard search on top of non-analyzed fields (requires you to allow leading wildcards), so search for *xyz*. However, just like in SQL, doing a LIKE %xyz or LIKE %xyz% - a search for *xyz or *xyz* results in a full index scan which is just not very efficient in any of the two environments, and you asked for an efficient way after all.
One very simple trick from that arena is to simply index the same term in reverse as well and then perform searches that has leading wildcards on that.
That would bring us towards something like: "field: xyz* AND field_reverse: zyx*". Which could be somewhat more digestible compared to ngrams.
Remember though, Lucene is a different kind of beast, the above is very much taking a "SQL mindset" and forcing that down over Lucene. That will not go very well in all cases.
Kind regards
Jens Melgaard
Architect
Systematic A/S
Søren Frichs Vej 39
8000 Aarhus C
Denmark
Mobile: +45 4196 5119
Jens.Melgaard@Systematic.com
https://systematic.com/defence/defence-newsletter
https://www.linkedin.com/showcase/systematic-defence/
-----Original Message-----
From: Haberl Norbert <No...@ssi-schaefer.com>
Sent: 26. juni 2020 10:10
To: user@lucenenet.apache.org
Subject: AW: Infix search possible in Lucene
[EXTERNAL]
Thanks Shad ... that's using prefix search within a given phrase (which is perfect if you are looking for book titles or so) I need a contaions search for autocompletes (mostly single words) -> an Sql equivalent to LIKE %xyz%
Wondering that lucene is not capable of this functionality.
I have seen the freetext suggester but there is no scoring and acts mostly as a fallback.
-----Ursprüngliche Nachricht-----
Von: Shad Storhaug <sh...@shadstorhaug.com>
Gesendet: Freitag, 26. Juni 2020 09:40
An: user@lucenenet.apache.org
Betreff: RE: Infix search possible in Lucene
Would using the AnalyzingInfixSuggester help?
https://lucenenet.apache.org/docs/4.8.0-beta00008/api/Lucene.Net.Suggest/Lucene.Net.Search.Suggest.Analyzing.AnalyzingInfixSuggester.html
-----Original Message-----
From: Haberl Norbert <No...@ssi-schaefer.com>
Sent: Friday, June 26, 2020 2:36 PM
To: user@lucenenet.apache.org
Subject: AW: Infix search possible in Lucene
Any details ?
-----Ursprüngliche Nachricht-----
Von: Erik Hatcher <er...@gmail.com>
Gesendet: Freitag, 26. Juni 2020 09:10
An: user@lucenenet.apache.org
Betreff: Re: Infix search possible in Lucene
Yes. This can be achieved by indexing ngrams of each word.
Erik
> On Jun 26, 2020, at 03:03, Haberl Norbert <No...@ssi-schaefer.com> wrote:
>
> Is there a way to perform efficient *xyz* queries in Lucene?
> I see a lot of suggesters in the src but no docs. Have read Mike's posts about autocomplete but this is based on prefix searches.
>
> Best regards,
> Norbert Haberl | Software Engineer - Global Tools Development |
> Customer Service & Support Phone +43 316 6096 - 8435 | Mobile +43 676
> 8766 - 8435 SSI SCHÄFER | SSI Schäfer Automation GmbH |
> Fischeraustraße 27 | 8051 Graz | Austria
>
> Norbert.Haberl@ssi-schaefer.com<mailto:Norbert.Haberl@ssi-schaefer.com
> >
>
> Website<http://www.ssi-schaefer.de/en> |
> Blog<http://www.ssi-schaefer.de/blog/en> |
> YouTube<http://youtube.com/warehouselogistics> |
> Facebook<http://facebook.com/SSI.SCHAEFER.EN>
>
AW: Infix search possible in Lucene
Posted by Haberl Norbert <No...@ssi-schaefer.com>.
Thanks Shad ... that's using prefix search within a given phrase (which is perfect if you are looking for book titles or so)
I need a contaions search for autocompletes (mostly single words) -> an Sql equivalent to LIKE %xyz%
Wondering that lucene is not capable of this functionality.
I have seen the freetext suggester but there is no scoring and acts mostly as a fallback.
-----Ursprüngliche Nachricht-----
Von: Shad Storhaug <sh...@shadstorhaug.com>
Gesendet: Freitag, 26. Juni 2020 09:40
An: user@lucenenet.apache.org
Betreff: RE: Infix search possible in Lucene
Would using the AnalyzingInfixSuggester help?
https://lucenenet.apache.org/docs/4.8.0-beta00008/api/Lucene.Net.Suggest/Lucene.Net.Search.Suggest.Analyzing.AnalyzingInfixSuggester.html
-----Original Message-----
From: Haberl Norbert <No...@ssi-schaefer.com>
Sent: Friday, June 26, 2020 2:36 PM
To: user@lucenenet.apache.org
Subject: AW: Infix search possible in Lucene
Any details ?
-----Ursprüngliche Nachricht-----
Von: Erik Hatcher <er...@gmail.com>
Gesendet: Freitag, 26. Juni 2020 09:10
An: user@lucenenet.apache.org
Betreff: Re: Infix search possible in Lucene
Yes. This can be achieved by indexing ngrams of each word.
Erik
> On Jun 26, 2020, at 03:03, Haberl Norbert <No...@ssi-schaefer.com> wrote:
>
> Is there a way to perform efficient *xyz* queries in Lucene?
> I see a lot of suggesters in the src but no docs. Have read Mike's posts about autocomplete but this is based on prefix searches.
>
> Best regards,
> Norbert Haberl | Software Engineer - Global Tools Development |
> Customer Service & Support Phone +43 316 6096 - 8435 | Mobile +43 676
> 8766 - 8435 SSI SCHÄFER | SSI Schäfer Automation GmbH |
> Fischeraustraße 27 | 8051 Graz | Austria
>
> Norbert.Haberl@ssi-schaefer.com<mailto:Norbert.Haberl@ssi-schaefer.com
> >
>
> Website<http://www.ssi-schaefer.de/en> |
> Blog<http://www.ssi-schaefer.de/blog/en> |
> YouTube<http://youtube.com/warehouselogistics> |
> Facebook<http://facebook.com/SSI.SCHAEFER.EN>
>
RE: Infix search possible in Lucene
Posted by Shad Storhaug <sh...@shadstorhaug.com>.
Would using the AnalyzingInfixSuggester help?
https://lucenenet.apache.org/docs/4.8.0-beta00008/api/Lucene.Net.Suggest/Lucene.Net.Search.Suggest.Analyzing.AnalyzingInfixSuggester.html
-----Original Message-----
From: Haberl Norbert <No...@ssi-schaefer.com>
Sent: Friday, June 26, 2020 2:36 PM
To: user@lucenenet.apache.org
Subject: AW: Infix search possible in Lucene
Any details ?
-----Ursprüngliche Nachricht-----
Von: Erik Hatcher <er...@gmail.com>
Gesendet: Freitag, 26. Juni 2020 09:10
An: user@lucenenet.apache.org
Betreff: Re: Infix search possible in Lucene
Yes. This can be achieved by indexing ngrams of each word.
Erik
> On Jun 26, 2020, at 03:03, Haberl Norbert <No...@ssi-schaefer.com> wrote:
>
> Is there a way to perform efficient *xyz* queries in Lucene?
> I see a lot of suggesters in the src but no docs. Have read Mike's posts about autocomplete but this is based on prefix searches.
>
> Best regards,
> Norbert Haberl | Software Engineer - Global Tools Development |
> Customer Service & Support Phone +43 316 6096 - 8435 | Mobile +43 676
> 8766 - 8435 SSI SCHÄFER | SSI Schäfer Automation GmbH |
> Fischeraustraße 27 | 8051 Graz | Austria
>
> Norbert.Haberl@ssi-schaefer.com<mailto:Norbert.Haberl@ssi-schaefer.com
> >
>
> Website<http://www.ssi-schaefer.de/en> |
> Blog<http://www.ssi-schaefer.de/blog/en> |
> YouTube<http://youtube.com/warehouselogistics> |
> Facebook<http://facebook.com/SSI.SCHAEFER.EN>
>
AW: Infix search possible in Lucene
Posted by Haberl Norbert <No...@ssi-schaefer.com>.
Any details ?
-----Ursprüngliche Nachricht-----
Von: Erik Hatcher <er...@gmail.com>
Gesendet: Freitag, 26. Juni 2020 09:10
An: user@lucenenet.apache.org
Betreff: Re: Infix search possible in Lucene
Yes. This can be achieved by indexing ngrams of each word.
Erik
> On Jun 26, 2020, at 03:03, Haberl Norbert <No...@ssi-schaefer.com> wrote:
>
> Is there a way to perform efficient *xyz* queries in Lucene?
> I see a lot of suggesters in the src but no docs. Have read Mike's posts about autocomplete but this is based on prefix searches.
>
> Best regards,
> Norbert Haberl | Software Engineer - Global Tools Development |
> Customer Service & Support Phone +43 316 6096 - 8435 | Mobile +43 676
> 8766 - 8435 SSI SCHÄFER | SSI Schäfer Automation GmbH |
> Fischeraustraße 27 | 8051 Graz | Austria
>
> Norbert.Haberl@ssi-schaefer.com<mailto:Norbert.Haberl@ssi-schaefer.com
> >
>
> Website<http://www.ssi-schaefer.de/en> |
> Blog<http://www.ssi-schaefer.de/blog/en> |
> YouTube<http://youtube.com/warehouselogistics> |
> Facebook<http://facebook.com/SSI.SCHAEFER.EN>
>
Re: Infix search possible in Lucene
Posted by Erik Hatcher <er...@gmail.com>.
Yes. This can be achieved by indexing ngrams of each word.
Erik
> On Jun 26, 2020, at 03:03, Haberl Norbert <No...@ssi-schaefer.com> wrote:
>
> Is there a way to perform efficient *xyz* queries in Lucene?
> I see a lot of suggesters in the src but no docs. Have read Mike's posts about autocomplete but this is based on prefix searches.
>
> Best regards,
> Norbert Haberl | Software Engineer - Global Tools Development | Customer Service & Support
> Phone +43 316 6096 - 8435 | Mobile +43 676 8766 - 8435
> SSI SCHÄFER | SSI Schäfer Automation GmbH | Fischeraustraße 27 | 8051 Graz | Austria
>
> Norbert.Haberl@ssi-schaefer.com<ma...@ssi-schaefer.com>
>
> Website<http://www.ssi-schaefer.de/en> | Blog<http://www.ssi-schaefer.de/blog/en> | YouTube<http://youtube.com/warehouselogistics> | Facebook<http://facebook.com/SSI.SCHAEFER.EN>
>