SQL: Improve translation of time floor expressions.#5107
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fjy merged 3 commits intoapache:masterfrom Nov 29, 2017
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The main change is to TimeFloorOperatorConversion.applyTimestampFloor. - Prefer timestamp_floor expressions to timeFormat extractionFns, to avoid turning things into strings when it isn't necessary. - Collapse CAST(FLOOR(X TO Y) AS DATE) to FLOOR(X TO Y) if appropriate.
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The main change is to TimeFloorOperatorConversion.applyTimestampFloor.
avoid turning things into strings when it isn't necessary.