Jiang Xingbo created SPARK-22359:
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Summary: Improve the test coverage of window functions
Key: SPARK-22359
URL: https://issues.apache.org/jira/browse/SPARK-22359
Project: Spark
Issue Type: Test
Components: SQL
Affects Versions: 2.3.0
Reporter: Jiang Xingbo
There are already quite a few integration tests using window functions, but the
unit tests coverage for window funtions is not ideal.
We'd like to test the following aspects:
* Specifications
** different partition clauses (none, one, multiple)
** different order clauses (none, one, multiple, asc/desc, nulls first/last)
* Frames and their combinations
** OffsetWindowFunctionFrame
** UnboundedWindowFunctionFrame
** SlidingWindowFunctionFrame
** UnboundedPrecedingWindowFunctionFrame
** UnboundedFollowingWindowFunctionFrame
* Aggregate function types
** Declarative
** Imperative
** UDAF
* Spilling
** Cover the conditions that WindowExec should spill at least once
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