Hello,
We have a decompounder and recently implemented the PositionLengthAttribute in
it and set it to 2 for a two-word compound such as drinkwater (drinking water
in dutch). The decompounder runs both at index- and query-time on Solr 6.5.0.
The problem is, q=content_nl:drinkwater no longer returns documents containing
drinkwater when posLenAtt = 2 at query time.
This is Solr's debug output for drinkwater with posLenAtt = 2:
<str name="rawquerystring">content_nl:drinkwater</str>
<str name="querystring">content_nl:drinkwater</str>
<str name="parsedquery">SynonymQuery(Synonym())</str>
<str name="parsedquery_toString">Synonym()</str>
This is the output where i reverted the decompounder, thus a posLenAtt = 1:
<str name="rawquerystring">content_nl:drinkwater</str>
<str name="querystring">content_nl:drinkwater</str>
<str name="parsedquery">SynonymQuery(Synonym(content_nl:drink
content_nl:drinkwater)) content_nl:water</str>
<str name="parsedquery_toString">Synonym(content_nl:drink
content_nl:drinkwater) content_nl:water</str>
The indexed terms still have posLenAtt = 2, but having a posLenAtt = 2 at query
time seems to be a problem.
Any thoughts on this issue? Is it a bug? Do i not understand
PositionLengthAttribute? Why does it affect term/document matching? At query
time but not at index time?
Many thanks,
Markus
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