[GitHub] [spark] wangyum opened a new pull request #25096: [SPARK-28334][SQL][TEST] Port select.sql

[GitBox <gi...@apache.org>]

wangyum opened a new pull request #25096: [SPARK-28334][SQL][TEST] Port select.sql
URL: https://github.com/apache/spark/pull/25096
 
 
   ## What changes were proposed in this pull request?
   
   This PR is to port select.sql from PostgreSQL regression tests. https://github.com/postgres/postgres/blob/REL_12_BETA2/src/test/regress/sql/select.sql
   
   The expected results can be found in the link: https://github.com/postgres/postgres/blob/REL_12_BETA2/src/test/regress/expected/select.out
   
   When porting the test cases, found four PostgreSQL specific features that do not exist in Spark SQL:
   [SPARK-28010](https://issues.apache.org/jira/browse/SPARK-28010): Support ORDER BY ... USING syntax
   [SPARK-28329](https://issues.apache.org/jira/browse/SPARK-28329): Support SELECT INTO syntax
   [SPARK-28330](https://issues.apache.org/jira/browse/SPARK-28330): Enhance query limit
   [SPARK-28296](https://issues.apache.org/jira/browse/SPARK-28296): Improved VALUES support
   
   Also, found one inconsistent behavior:
   [SPARK-28333](https://issues.apache.org/jira/browse/SPARK-28333): `NULLS FIRST` for `DESC` and `NULLS LAST` for `ASC`
   
   ## How was this patch tested?
   
   N/A

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