I am writing a function in a function_score query to alter the default
score of a document based on the value of an attribute. For example, if an
attribute "status" has two values "open" and "closed" and I want search
hits with "open" status to be ranked higher than those with "closed"
status.
My current idea is to scale the score of a search hit to a scale of 0 to
(0.5max_score) for records with "closed" status and scale of
(0.5max_score to max_score) for records with "open" status. This will make
open records to rank higher than closed records. This requires max_score to
be known in the function script.
Questions -
- How to access max_score of a search hit in the function script?
- Is there an alternate way to achieve the above ranking?
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