Function queries:
https://cwiki.apache.org/confluence/display/solr/Function+Queries
The function would be sub
Then you want its result mapped to a fq. could probably be as simple
as fq={!func}sub(value,cost).

Because the value of the function will be treated as a relevance value
and relevance value of 0 (and less?) will cause the record to be
filtered out.

Regards,
   Alex.
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On 1 June 2017 at 13:46, Mikhail Ibraheem
<mikhail.ibrah...@yahoo.com.invalid> wrote:
> Hi,I have 2 fields "cost" and "value" at my records. I want to get all 
> documents that have "value" greater than "cost". Something likeq=value:[cost 
> TO *]
> Please advise.
> Thanks

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