Alessandro Benedetti created SOLR-15449:
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Summary: edimax sow causes issues with minimum should match in
case of multi field with different analysis
Key: SOLR-15449
URL: https://issues.apache.org/jira/browse/SOLR-15449
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Affects Versions: 8.8.2
Reporter: Alessandro Benedetti
in multi-field search with different analysis per field
sow=true implies the minimum should match is "per document"
i.e a document to be a match must contain all the mm query terms anywhere at
least once
sow=false implies the minimum should match is "per field"
i.e a document to be a match must contain all the mm query terms in a single
field at least once
When the query parsed moves from being term centric(sow=true) to field
centric(sow=false and different text analysis), mm means two different things:
{code:java}
sow = true
mm=2
qf = author subjects_as_same_term
q = united kingdom
defType = edismax
"parsedquery_toString":
"+(((author:united | subjects_as_same_term:united) (author:kingdom |
subjects_as_same_term:kingdom))~2)"
{code}
{code:java}
"response":{"numFound":2,"start":0,"maxScore":7.757958,"numFoundExact":true,"docs":[
{
"id":"888888",
"author":"united",
"subjects":["kingdom"],
"score":7.757958},
{
"id":"77777",
"author":"united kingdom",
"score":5.874222}]
},
{code}
mimimum of query terms matched within the same field (i.e. all query terms
required must be found in one of the fields)
“PER FIELD”
{code:java}
sow = false
mm=2
qf = author subjects_as_same_term
q = united kingdom
defType = edismax
"parsedquery_toString":
"+(((author:united author:kingdom)~2) |
(((subjects_as_same_term:uk subjects_as_same_term:"united kingdom"
subjects_as_same_term:england subjects_as_same_term:london
subjects_as_same_term:british subjects_as_same_term:britain))~1))"
{code}
This (author:united author:kingdom)~2 means we need both the clauses to match
to have a good candidate, in disjunction with
(subjects_as_same_term:uk subjects_as_same_term:”united kingdom”
subjects_as_same_term:england subjects_as_same_term:london
subjects_as_same_term:british subjects_as_same_term:britain))~1 that means we
need at least one clause to match (because synonyms expanded the two original
terms into a single one)
{code:java}
"response":{"numFound":1,"start":0,"maxScore":5.874222,"numFoundExact":true,"docs":[
{
"id":"77777",
"author":"united kingdom",
"score":5.874222}]
}
{code}
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