Bill Schneider created SPARK-56561:
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             Summary: document where array_distinct and similar functions 
preserve order
                 Key: SPARK-56561
                 URL: https://issues.apache.org/jira/browse/SPARK-56561
             Project: Spark
          Issue Type: Documentation
          Components: Documentation
    Affects Versions: 4.1.1, 3.5.8
            Reporter: Bill Schneider


It would be good for reference documentation of SQL functions to explicitly say 
when functions like `array_distinct` will (and won't) preserve order.

This would be useful to cite during code reviews, and may also help inform AI 
coding agents



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