Github user LosD commented on the issue:
https://github.com/apache/metamodel/pull/171
Hasn't looked super thoroughly at it, but mostly LGTM.
A few thoughts: Not really a fan of MM helper getting bigger, when I think
it should basically die in a fire, replaced with more specialised classes, but
oh well. If it helps here, we can always refactor into a sensible model later
if so decided.
There's a lot of changes to Mongo. Could it be that we need to do similar
things to other databases that supports map-like queries?
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