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https://issues.apache.org/jira/browse/SPARK-27763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16964583#comment-16964583
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Takeshi Yamamuro commented on SPARK-27763:
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Thanks for the check, Hyukjin! I've made PRs for limit.sql and groupingset.sql.
I'll check the left three tests within a few days.
> Port test cases from PostgreSQL to Spark SQL
> --------------------------------------------
>
> Key: SPARK-27763
> URL: https://issues.apache.org/jira/browse/SPARK-27763
> Project: Spark
> Issue Type: Umbrella
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Xiao Li
> Assignee: Yuming Wang
> Priority: Major
>
> To improve the test coverage, we can port the regression tests from the other
> popular open source projects to Spark SQL. PostgreSQL is one of the best SQL
> systems. Below are the links to the test cases and results.
> * Regression test cases:
> [https://github.com/postgres/postgres/tree/master/src/test/regress/sql]
> * Expected results:
> [https://github.com/postgres/postgres/tree/master/src/test/regress/expected]
> Spark SQL does not support all the feature sets of PostgreSQL. In the current
> stage, we should first comment out these test cases and create the
> corresponding JIRAs in SPARK-27764. We can discuss and prioritize which
> features we should support. Also, these PostgreSQL regression tests could
> also expose the existing bugs of Spark SQL. We should also create the JIRAs
> and track them in SPARK-27764.
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