GitHub user jiangxb1987 opened a pull request:
https://github.com/apache/spark/pull/18814
[SPARK-21608][SPARK-9221][SQL] Window rangeBetween() API should allow
literal boundary
## What changes were proposed in this pull request?
Window rangeBetween() API should allow literal boundary, that means, the
window range frame can calculate frame of double/date/timestamp.
Example of the use case can be:
```
SELECT
val_timestamp,
cate,
avg(val_timestamp) OVER(PARTITION BY cate ORDER BY val_timestamp RANGE
BETWEEN CURRENT ROW AND interval 23 days 4 hours FOLLOWING)
FROM testData
```
This PR refactors the Window `rangeBetween` and `rowsBetween` API, while
the legacy user code should still be valid.
## How was this patch tested?
Add new test cases both in `DataFrameWindowFunctionsSuite` and in
`window.sql`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/jiangxb1987/spark literal-boundary
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/18814.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #18814
----
commit a6d111b656320a06f197f18ab149803ec6b0a913
Author: Xingbo Jiang <[email protected]>
Date: 2017-08-02T06:16:02Z
refactor Window rangeBetween API
commit 7893e5dd7aa37daa6c176e7228a2a71938d78514
Author: Xingbo Jiang <[email protected]>
Date: 2017-08-02T07:33:57Z
code cleanup
----
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