[jira] [Created] (SPARK-54718) Preserve attributes names during CTE newInstance()

["Mikhail Nikoliukin (Jira)" <ji...@apache.org>]

Mikhail Nikoliukin created SPARK-54718:
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             Summary: Preserve attributes names during CTE newInstance()
                 Key: SPARK-54718
                 URL: https://issues.apache.org/jira/browse/SPARK-54718
             Project: Spark
          Issue Type: Task
          Components: SQL
    Affects Versions: 4.2.0
            Reporter: Mikhail Nikoliukin


Current implementation of CTERelationRef.newInstance() has incorrect behavior if cte has multiple attributes with the same ID but different names. The common case of it: referencing one attribute by names with different cases: {{SELECT COLNAME, colname FROM t
}}
Together with the fact that newInstance() is called during exprId deduplication, this leads to inconsistent results: sometimes names in one case, sometimes in another



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