sc-6011 add FetchLimit trait #1850
Draft
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Draft pending typelevel/grackle#731
This adds
FetchLimitmixin forSqlMappingthat will cause queries to fail when the result set under construction exceeds a given memory limit. It's not turned on right now so it should have no effect, but it will be there if we need it. The size calculation will probably need to be extended and optimized for real use.