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Jungtaek Lim 118a53d87f [SPARK-36595][SQL][SS][DOCS] Document window & session_window function in SQL API doc 
### What changes were proposed in this pull request?

This PR proposes to document `window` & `session_window` function in SQL API doc page.

Screenshot of functions:

> window

![스크린샷 2021-08-26 오후 6 34 58](https://user-images.githubusercontent.com/1317309/130939754-0ea1b55e-39d4-4205-b79d-a9508c98921c.png)

> session_window

![스크린샷 2021-08-26 오후 6 35 19](https://user-images.githubusercontent.com/1317309/130939773-b6cb4b98-88f8-4d57-a188-ee40ed7b2b08.png)

### Why are the changes needed?

Description is missing in both `window` / `session_window` functions for SQL API page.

### Does this PR introduce _any_ user-facing change?

Yes, the description of `window` / `session_window` functions will be available in SQL API page.

### How was this patch tested?

Only doc changes.

Closes #33846 from HeartSaVioR/SPARK-36595.

Authored-by: Jungtaek Lim <kabhwan.opensource@gmail.com>
Signed-off-by: Jungtaek Lim <kabhwan.opensource@gmail.com>
(cherry picked from commit bc32144a91)
Signed-off-by: Jungtaek Lim <kabhwan.opensource@gmail.com>
2021-08-27 12:39:21 +09:00
..
benchmarks [SPARK-34981][SQL][FOLLOWUP] Use SpecificInternalRow in ApplyFunctionExpression 2021-05-24 17:25:24 +09:00
src [SPARK-36595][SQL][SS][DOCS] Document window & session_window function in SQL API doc 2021-08-27 12:39:21 +09:00
pom.xml Preparing development version 3.2.1-SNAPSHOT 2021-08-20 12:40:47 +00:00