[GitHub] AlexanderKaraberov commented on issue #1142: fabric:query_view/4 fails if number of docs in the DB is more than 60

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AlexanderKaraberov commented on issue #1142: fabric:query_view/4 fails if number of docs in the DB is more than 60
URL: https://github.com/apache/couchdb/issues/1142#issuecomment-372245289
 
 
   Hi @davisp , 
   Thanks for the explanation! Regarding my use case (namely fine-grained filtering in `_changes` feed) I'm planning to implement an alternative implementation to avoid misuse of the ` rexi_util:recv`. Basically I want to call `fabric:query_view` only once in `chttpd_db:handle_changes_req` then store a response in the `ETS` table and then use it like this to do the actual filtering instead of `couch_query_servers:filter_view()`:
   ```erlang 
       Passes = case couch_util:get_value(row, lists:first(ets:lookup(Resp, ViewResp)), undefined) of
               undefined ->
                 lists:map(fun (_) -> false end, Docs);
               Object ->
                 lists:map(fun (_) -> true end, Docs)
               end,
       filter_revs(Passes, Docs);
   ```
   What is your opinion about this approach? Or maybe you may give a hint on how to implement this in  a better way?

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