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https://issues.apache.org/jira/browse/SPARK-47617?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-47617.
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Fix Version/s: 4.0.0
Resolution: Fixed
Issue resolved by pull request 45739
[https://github.com/apache/spark/pull/45739]
> Add TPC-DS testing infrastructure for collations
> ------------------------------------------------
>
> Key: SPARK-47617
> URL: https://issues.apache.org/jira/browse/SPARK-47617
> Project: Spark
> Issue Type: Task
> Components: SQL
> Affects Versions: 4.0.0
> Reporter: Nikola Mandic
> Assignee: Nikola Mandic
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
>
> As collation support grows across all SQL features and new collation types
> are added, we need to have reliable testing model covering as many standard
> SQL capabilities as possible.
> We can utilize TPC-DS testing infrastructure already present in Spark. The
> idea is to vary TPC-DS table string columns by adding multiple collations
> with different ordering rules and case sensitivity, producing new tables.
> These tables should yield the same results against predefined TPC-DS queries
> for certain batches of collations. For example, when comparing query runs on
> table where columns are first collated as UTF8_BINARY and then as
> UTF8_BINARY_LCASE, we should be getting same results after converting to
> lowercase.
> Introduce new query suite which tests the described behavior with available
> collations (utf8_binary and unicode) combined with case conversions
> (lowercase, uppercase, randomized case for fuzzy testing).
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