Wenchen Fan 8dee8a9b7c [SPARK-34227][SQL] WindowFunctionFrame should clear its states during preparation ... ### What changes were proposed in this pull request? This PR fixed all `OffsetWindowFunctionFrameBase#prepare` implementations to reset the states, and also add more comments in `WindowFunctionFrame` classdoc to explain why we need to reset states during preparation: `WindowFunctionFrame` instances are reused to process multiple partitions. ### Why are the changes needed? To fix a correctness bug caused by the new feature "window function with ignore nulls" in the master branch. ### Does this PR introduce _any_ user-facing change? yes ### How was this patch tested? new test Closes #31325 from cloud-fan/bug. Authored-by: Wenchen Fan <wenchen@databricks.com> Signed-off-by: Wenchen Fan <wenchen@databricks.com>		2021-01-26 08:50:14 +00:00
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benchmarks	[SPARK-34192][SQL] Move char padding to write side and remove length check on read side too	2021-01-26 02:08:35 +08:00
src	[SPARK-34227][SQL] WindowFunctionFrame should clear its states during preparation	2021-01-26 08:50:14 +00:00
pom.xml	[SPARK-33662][BUILD] Setting version to 3.2.0-SNAPSHOT	2020-12-04 14:10:42 -08:00