drin commented on PR #18648:
URL: https://github.com/apache/datafusion/pull/18648#issuecomment-4006140110
okay, I can do that.
just so we're clear, the first case can only capture when the right-hand
constant is aligned. I agree it's a clear win, but continuing with the
date_trunc('month', ...) example, it's applicable to 1 value for every 30
values, and that's not including time and timezone offsets. As far as I can
tell, date_trunc truncates time stamps to UTC so any other timezone will only
get the optimization if it's pre-normalized to UTC midnight.
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