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https://issues.apache.org/jira/browse/SOLR-12409?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16492061#comment-16492061
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Sambhav Kothari commented on SOLR-12409:
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Isn't this a bug, since the behaviour is varying across the two of them?
> Different behaviour of pf with dismax and edismax
> -------------------------------------------------
>
> Key: SOLR-12409
> URL: https://issues.apache.org/jira/browse/SOLR-12409
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: query parsers
> Affects Versions: 7.3.1
> Environment: Ubuntu 17.10
>
> Reporter: Sambhav Kothari
> Priority: Major
>
> Hello,
>
> I experienced a weird behaviour with dismax and edismax query parsers.
> Dismax will include pf boosts when we query something that has just a single
> word, edismax on the other hand will not include pf boosts.
>
> The result is that a dismax and an edismax handler with the same set of
> defaults, return different results for single word queries (eg. "Hello") but
> the same results for multi word queries (eg. "Hello Wold")
>
> Is this expected?
>
> Attaching debug query logs for both below.
>
> {code:java}
> // Single word query against dismax QH
> {
> "rawquerystring":"pink",
> "querystring":"pink",
> "parsedquery":"+DisjunctionMaxQuery((area:pink | country:pink | ipi:pink |
> (artist:pink)^2.0 | beginarea:pink | type:pink | (sortname:pink)^2.0 |
> isni:pink | alias:pink | comment:pink | ngram:pink | tag:pink))
> DisjunctionMaxQuery(((sortname:pink)^1.2 | (alias:pink)^1.2 |
> (comment:pink)^1.2 | (artist:pink)^1.5))
> FunctionQuery(log(sum(int(ref_count),const(1))))^3.0",
> "parsedquery_toString":"+(area:pink | country:pink | ipi:pink |
> (artist:pink)^2.0 | beginarea:pink | type:pink | (sortname:pink)^2.0 |
> isni:pink | alias:pink | comment:pink | ngram:pink | tag:pink)
> ((sortname:pink)^1.2 | (alias:pink)^1.2 | (comment:pink)^1.2 |
> (artist:pink)^1.5) (log(sum(int(ref_count),const(1))))^3.0"
> }
> // Single word query against edismax QH
> {
> "rawquerystring":"pink ",
> "querystring":"pink ",
> "parsedquery":"+DisjunctionMaxQuery((area:pink | country:pink | ipi:pink |
> (artist:pink)^2.0 | beginarea:pink | type:pink | (sortname:pink)^2.0 |
> isni:pink | alias:pink | comment:pink | ngram:pink | tag:pink)) ()
> FunctionQuery(log(sum(int(ref_count),const(1))))^3.0",
> "parsedquery_toString":"+(area:pink | country:pink | ipi:pink |
> (artist:pink)^2.0 | beginarea:pink | type:pink | (sortname:pink)^2.0 |
> isni:pink | alias:pink | comment:pink | ngram:pink | tag:pink) ()
> (log(sum(int(ref_count),const(1))))^3.0"
> }
> // Multi word query against dismax QH
> {
> "rawquerystring":"pink floyd",
> "querystring":"pink floyd",
> "parsedquery":"+(DisjunctionMaxQuery((area:pink | country:pink | ipi:pink |
> (artist:pink)^2.0 | beginarea:pink | type:pink | (sortname:pink)^2.0 |
> isni:pink | alias:pink | comment:pink | ngram:pink | tag:pink))
> DisjunctionMaxQuery((area:floyd | country:floyd | ipi:floyd |
> (artist:floyd)^2.0 | beginarea:floyd | type:floyd | (sortname:floyd)^2.0 |
> isni:floyd | alias:floyd | comment:floyd | ngram:floyd | tag:floyd)))~2
> DisjunctionMaxQuery(((sortname:\"pink floyd\")^1.2 | (alias:\"pink
> floyd\")^1.2 | (comment:\"pink floyd\")^1.2 | (artist:\"pink floyd\")^1.5))
> FunctionQuery(log(sum(int(ref_count),const(1))))^3.0",
> "parsedquery_toString":"+(((area:pink | country:pink | ipi:pink |
> (artist:pink)^2.0 | beginarea:pink | type:pink | (sortname:pink)^2.0 |
> isni:pink | alias:pink | comment:pink | ngram:pink | tag:pink) (area:floyd |
> country:floyd | ipi:floyd | (artist:floyd)^2.0 | beginarea:floyd | type:floyd
> | (sortname:floyd)^2.0 | isni:floyd | alias:floyd | comment:floyd |
> ngram:floyd | tag:floyd))~2) ((sortname:\"pink floyd\")^1.2 | (alias:\"pink
> floyd\")^1.2 | (comment:\"pink floyd\")^1.2 | (artist:\"pink floyd\")^1.5)
> (log(sum(int(ref_count),const(1))))^3.0"
> }
> // Multi word query against edismax QH
> {
> "rawquerystring":"pink floyd",
> "querystring":"pink floyd",
> "parsedquery":"+DisjunctionMaxQuery((((area:pink area:floyd)~2) |
> country:pink floyd | ipi:pinkfloyd | () | ((artist:pink artist:floyd)~2)^2.0
> | ((beginarea:pink beginarea:floyd)~2) | type:pink floyd | ((sortname:pink
> sortname:floyd)~2)^2.0 | isni:pinkfloyd | ((alias:pink alias:floyd)~2) |
> ((comment:pink comment:floyd)~2) | ((ngram:pink ngram:floyd)~2) | ((tag:pink
> tag:floyd)~2))) DisjunctionMaxQuery(((artist:\"pink floyd\")^1.5 |
> (alias:\"pink floyd\")^1.2 | (sortname:\"pink floyd\")^1.2 | (comment:\"pink
> floyd\")^1.2)) FunctionQuery(log(sum(int(ref_count),const(1))))^3.0",
> "parsedquery_toString":"+(((area:pink area:floyd)~2) | country:pink floyd |
> ipi:pinkfloyd | () | ((artist:pink artist:floyd)~2)^2.0 | ((beginarea:pink
> beginarea:floyd)~2) | type:pink floyd | ((sortname:pink
> sortname:floyd)~2)^2.0 | isni:pinkfloyd | ((alias:pink alias:floyd)~2) |
> ((comment:pink comment:floyd)~2) | ((ngram:pink ngram:floyd)~2) | ((tag:pink
> tag:floyd)~2)) ((artist:\"pink floyd\")^1.5 | (alias:\"pink floyd\")^1.2 |
> (sortname:\"pink floyd\")^1.2 | (comment:\"pink floyd\")^1.2)
> (log(sum(int(ref_count),const(1))))^3.0"
> }
> {code}
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