nickva commented on a change in pull request #1574: Fix builtin _sum reduce
function
URL: https://github.com/apache/couchdb/pull/1574#discussion_r212377506
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File path: src/couch/src/couch_query_servers.erl
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@@ -247,6 +248,30 @@ sum_arrays([X|Xs], [Y|Ys]) when is_number(X),
is_number(Y) ->
sum_arrays(Else, _) ->
throw_sum_error(Else).
+check_sum_overflow(InSize, OutSize, Sum) ->
+ Overflowed = OutSize > 4906 andalso OutSize * 2 > InSize,
+ case config:get("query_server_config", "reduce_limit", "true") of
+ "true" when Overflowed ->
+ Msg = log_sum_overflow(InSize, OutSize),
+ {[
+ {<<"error">>, <<"builtin_reduce_error">>},
+ {<<"reason">>, Msg}
+ ]};
+ "log" when OutSize > 4096 andalso OutSize > 2 * InSize ->
Review comment:
Use `Overflowed` variable here as well, it also the updated correct logic
for overflow.
To double check:
https://github.com/apache/couchdb/blob/bf72d619d11d787c4cd5bf343d7dfeb4b16ef01a/share/server/views.js#L41
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