pgj commented on code in PR #4792:
URL: https://github.com/apache/couchdb/pull/4792#discussion_r1347583775
##########
src/mango/src/mango_cursor.erl:
##########
@@ -53,8 +53,24 @@ create(Db, Selector0, Opts, Kind) ->
{UsableIndexes, Trace} = mango_idx:get_usable_indexes(Db, Selector, Opts,
Kind),
case maybe_filter_indexes_by_ddoc(UsableIndexes, Opts) of
[] ->
- % use_index doesn't match a valid index - fall back to a valid one
- create_cursor(Db, {UsableIndexes, Trace}, Selector, Opts);
+ % use_index doesn't match a valid index - determine how
+ % this shall be handled by the further settings
+ case allow_fallback(Opts) of
+ true ->
+ % fall back to a valid index
+ create_cursor(Db, {UsableIndexes, Trace}, Selector, Opts);
+ false ->
+ % return an error
+ Details =
+ case use_index(Opts) of
+ [] ->
+ [];
+ UseIndex ->
+ [DesignId | Rest] = UseIndex,
+ [ddoc_name(DesignId) | Rest]
Review Comment:
This is now fixed.
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