villebro commented 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 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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