villebro edited a comment on issue #8183: How to pass time filters to SQL Lab 
queries
URL: 
https://github.com/apache/incubator-superset/issues/8183#issuecomment-536112676
 
 
   @rubypollev the proposed approach makes sense, especially reusing existing 
code from `utils.core`. However, if memory serves me right, `BETWEEN` might 
mean different things depending on the dialect; sometimes inclusive, sometimes 
not (I might be wrong, though). Anyway, In `connectors/sqla/models.py`, 
`get_time_filter()` creates `<=` and/or `>=` where clauses, so probably a good 
idea to stick to that logic. While it might be difficult to leverage existing 
SqlAlchemy Core functionality in this case (might be feasible, not sure), I 
think it makes sense to try to diverge from the default logic as much as 
possible. So prior to submitting a PR I would advise to at least change the 
`BETWEEN` operator to `<=` and/or `>=` operator(s), with additional bonus for 
utilizing any existing code.

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