Cristian Lorenzetto created LUCENE-7404:
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Summary: prepared query for introducing evaluation expression in
query (not fixed second comparation member)
Key: LUCENE-7404
URL: https://issues.apache.org/jira/browse/LUCENE-7404
Project: Lucene - Core
Issue Type: Improvement
Reporter: Cristian Lorenzetto
Lucene is very powerfull but has a limitation very important. It is impossible
to use when you want create a query where is a expression inside.
field1: >= field2 where field1 and field2 is not possible.
field1:= field2^2 -4 *field3
it is pratically impossible to index statically document for this query but it
is possible to do 2 things:
1) create a third field hidden here is saved the result.
2) when you use a prepared query , it is saved automatically in a different
writer this info that you can save.
Creating a prepared query lucene do all automatically for making this query
using indexes.
PS. Pay attention that fields in expression could be not only inside the
current document but also in different documents/readers.
It could be used also for join different document types(it is a subcase of the
above problem).
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