A couple of reasons. The biggest issue is multi word synonyms since the query parser will tokenize the query before analysis is applied. Also, scoring could be affected and the results can be screwy. Here is a better write up:
http://wiki.apache.org/solr/AnalyzersTokenizersTokenFilters#solr.SynonymFilterFactory -- Ivan On Tue, Jul 22, 2014 at 10:47 AM, Daniel Yim <[email protected]> wrote: > Thank you! That solved the initial issue. > > Could you expand on why I would need two analyzers? I did what you asked, > but I am unsure of the reason behind it and would like to learn. > > Here are my updated settings: > > curl -XPUT "http://localhost:9200/personsearch"; -d' > { > "settings": { > "index": { > "analysis": { > "analyzer": { > "XYZSynAnalyzer": { > "tokenizer": "whitespace", > "filter": [ > "lowercase", > "XYZSynFilter" > ] > }, > "MyAnalyzer": { > "tokenizer": "standard", > "filter": [ > "standard", > "lowercase", > "stop" > ] > } > }, > "filter": { > "XYZSynFilter": { > "type": "synonym", > "synonyms": [ > "aids, retrovirology" > ] > } > } > } > } > }, > "mappings": { > "xyzemployee": { > "_all": { > "analyzer": "XYZSynAnalyzer" > }, > "properties": { > "firstName": { > "type": "string" > }, > "lastName": { > "type": "string" > }, > "middleName": { > "type": "string", > "include_in_all": false, > "index": "not_analyzed" > }, > "specialty": { > "type": "string", > "index_analyzer": "XYZSynAnalyzer", > "search_analyzer": "MyAnalyzer" > } > } > } > } > }' > > On Tuesday, July 22, 2014 11:56:40 AM UTC-5, Ivan Brusic wrote: > >> Your issue is casing. You are only applying the synonym filter, which by >> default does not lowercase terms. You can either set ignore_case to true >> for the synonym filter or apply a lower case filter before the synonym. I >> prefer to use the latter approach since I prefer to have all my analyzed >> tokens lowercased. >> >> Also, you should only apply the synonym filter at index time. You would >> need to create two similar analyzers, one with the synonym filter and one >> without. You can set the different ones via index_analyzer and >> search_analyzer. >> >> http://www.elasticsearch.org/guide/en/elasticsearch/ >> reference/current/mapping-core-types.html#string >> >> Cheers, >> >> Ivan >> >> >> On Tue, Jul 22, 2014 at 9:33 AM, Daniel Yim <[email protected]> wrote: >> >>> Hi everyone, >>> >>> I am relatively new to elasticsearch and am having issues with getting >>> my synonym filter to work. Can you take a look at the settings and tell me >>> where I am going wrong? >>> >>> I am expecting the search for "aids" to match the search results if I >>> were to search for "retrovirology", but this is not happening. >>> >>> Thanks! >>> >>> curl -XDELETE "http://localhost:9200/personsearch"; >>> >>> curl -XPUT "http://localhost:9200/personsearch"; -d' >>> { >>> "settings": { >>> "index": { >>> "analysis": { >>> "analyzer": { >>> "XYZSynAnalyzer": { >>> "tokenizer": "standard", >>> "filter": [ >>> "XYZSynFilter" >>> ] >>> } >>> }, >>> "filter": { >>> "XYZSynFilter": { >>> "type": "synonym", >>> "synonyms": [ >>> "aids, retrovirology" >>> ] >>> } >>> } >>> } >>> } >>> }, >>> "mappings": { >>> "xyzemployee": { >>> "_all": { >>> "analyzer": "XYZSynAnalyzer" >>> }, >>> "properties": { >>> "firstName": { >>> "type": "string" >>> }, >>> "lastName": { >>> "type": "string" >>> }, >>> "middleName": { >>> "type": "string", >>> "include_in_all": false, >>> "index": "not_analyzed" >>> }, >>> "specialty": { >>> "type": "string", >>> "analyzer": "XYZSynAnalyzer" >>> } >>> } >>> } >>> } >>> }' >>> >>> curl -XPUT "http://localhost:9200/personsearch/xyzemployee/1"; -d' >>> { >>> "firstName": "Don", >>> "middleName": "W.", >>> "lastName": "White", >>> "specialty": "Adult Retrovirology" >>> }' >>> >>> curl -XPUT "http://localhost:9200/personsearch/xyzemployee/2"; -d' >>> { >>> "firstName": "Terrance", >>> "middleName": "G.", >>> "lastName": "Gartner", >>> "specialty": "Retrovirology" >>> }' >>> >>> curl -XPUT "http://localhost:9200/personsearch/xyzemployee/3"; -d' >>> { >>> "firstName": "Carter", >>> "middleName": "L.", >>> "lastName": "Taylor", >>> "specialty": "Pediatric Retrovirology" >>> }' >>> >>> curl -XGET "http://localhost:9200/personsearch/xyzemployee/_ >>> search?pretty=true" -d' >>> { >>> "query": { >>> "match": { >>> "specialty": "retrovirology" >>> } >>> } >>> }' >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "elasticsearch" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> >>> To view this discussion on the web visit https://groups.google.com/d/ >>> msgid/elasticsearch/2e227a33-d935-4d22-89fb-57b59358c89d% >>> 40googlegroups.com >>> <https://groups.google.com/d/msgid/elasticsearch/2e227a33-d935-4d22-89fb-57b59358c89d%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> For more options, visit https://groups.google.com/d/optout. >>> >> >> -- > You received this message because you are subscribed to the Google Groups > "elasticsearch" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/elasticsearch/c860ecf3-e4ae-4aad-8a44-e41166f7995e%40googlegroups.com > <https://groups.google.com/d/msgid/elasticsearch/c860ecf3-e4ae-4aad-8a44-e41166f7995e%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "elasticsearch" group. 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