Takeshi Yamamuro
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e01125db0d
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[SPARK-31562][SQL] Update ExpressionDescription for substring, current_date, and current_timestamp
### What changes were proposed in this pull request?
This PR intends to add entries for substring, current_date, and current_timestamp in the SQL built-in function documents. Specifically, the entries are as follows;
- SELECT current_date;
- SELECT current_timestamp;
- SELECT substring('abcd' FROM 1);
- SELECT substring('abcd' FROM 1 FOR 2);
### Why are the changes needed?
To make the SQL (built-in functions) references complete.
### Does this PR introduce any user-facing change?
<img width="1040" alt="Screen Shot 2020-04-25 at 16 51 07" src="https://user-images.githubusercontent.com/692303/80274851-6ca5ee00-8718-11ea-9a35-9ae82008cb4b.png">
<img width="974" alt="Screen Shot 2020-04-25 at 17 24 24" src="https://user-images.githubusercontent.com/692303/80275032-a88d8300-8719-11ea-92ec-95b80169ae28.png">
<img width="862" alt="Screen Shot 2020-04-25 at 17 27 48" src="https://user-images.githubusercontent.com/692303/80275114-36696e00-871a-11ea-8e39-02e93eabb92f.png">
### How was this patch tested?
Added test examples.
Closes #28342 from maropu/SPARK-31562.
Authored-by: Takeshi Yamamuro <yamamuro@apache.org>
Signed-off-by: Dongjoon Hyun <dongjoon@apache.org>
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2020-04-26 11:46:52 -07:00 |
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