[SPARK-46625][SQL] Place IDENTIFIER placeholder in command name slot#55949

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cloud-fan:parser-identifier-cte-placement

Commits on May 18, 2026

[SPARK-46625][SQL] Place IDENTIFIER placeholder in command name slot
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Drop innerPlans abstraction; special-case InsertIntoStatement
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Fix stale innerPlans reference in ParametersSuite comment
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Skip post-hoc CTEInChildren collapse when non-child slots ref the cteDefs
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Push placeholder into OverwriteByExpression.table; drop post-hoc collapse
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Replace em-dashes with ASCII to satisfy scalastyle nonascii
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Tighten OverwriteByExpression slot handling; assert placeholder has children
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Rewrite withCTEDefs comment; add RTAS+CTE parser test
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Match V2WriteCommand instead of OverwriteByExpression
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Tighten withCTEDefs invariant to single-child; document CTEInChildren safety
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Make CacheTableAsSelect.tempViewName an Expression; drop placeholder CTEInChildren
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Use typed-guard match for InsertIntoStatement; narrow buildWriteTableSlot return type; comment fixes
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Guard CacheTableAsSelect CheckAnalysis on tempViewName.resolved
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Commits on May 19, 2026