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Merged
GuoPhilipse merged 6 commits into from
May 22, 2020
Merged

sync #3

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83d0967
[SPARK-31784][CORE][TEST] Fix test BarrierTaskContextSuite."share mes…
Ngone51 May 22, 2020
245aee9
[SPARK-31757][CORE] Improve HistoryServerDiskManager.updateAccessTime()
jiangxb1987 May 22, 2020
ce4da29
[SPARK-31755][SQL] allow missing year/hour when parsing date/timestam…
cloud-fan May 22, 2020
892b600
[SPARK-31790][DOCS] cast(long as timestamp) show different result bet…
GuoPhilipse May 22, 2020
d955708
[SPARK-31756][WEBUI] Add real headless browser support for UI test
sarutak May 22, 2020
2115c55
[SPARK-31710][SQL] Adds TIMESTAMP_SECONDS, TIMESTAMP_MILLIS and TIMES…
TJX2014 May 22, 2020
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[SPARK-31790][DOCS] cast(long as timestamp) show different result bet… 
…ween Hive and Spark

### What changes were proposed in this pull request?
add docs for sql migration-guide

### Why are the changes needed?
let user know more about the cast scenarios in which Hive and Spark generate different results

### Does this PR introduce _any_ user-facing change?
no

### How was this patch tested?
no need to test

Closes apache#28605 from GuoPhilipse/spark-docs.

Lead-authored-by: GuoPhilipse <[email protected]>
Co-authored-by: GuoPhilipse <[email protected]>
Signed-off-by: HyukjinKwon <[email protected]>
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@GuoPhilipse @HyukjinKwon
2 people authored and HyukjinKwon committed May 22, 2020
commit 892b600ce3a579ea4acabf8ff378c19830a7d89c
1 change: 1 addition & 0 deletions docs/sql-migration-guide.md
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Expand Up @@ -961,3 +961,4 @@ Below are the scenarios in which Hive and Spark generate different results:
* `SQRT(n)` If n < 0, Hive returns null, Spark SQL returns NaN.
* `ACOS(n)` If n < -1 or n > 1, Hive returns null, Spark SQL returns NaN.
* `ASIN(n)` If n < -1 or n > 1, Hive returns null, Spark SQL returns NaN.
* `CAST(n AS TIMESTAMP)` If n is integral numbers, Hive treats n as milliseconds, Spark SQL treats n as seconds.