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object ExpressionIdAssigner

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Type Members

  1. type Mapping = HashMap[ExprId, ExprId]
  2. type Stack = ArrayDeque[StackEntry]
  3. case class StackEntry(mapping: Option[Mapping] = None, outerMapping: Option[Mapping] = None, childMappings: ArrayDeque[Mapping] = new ArrayDeque[Mapping]) extends Product with Serializable

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  1. final def !=(arg0: Any): Boolean
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  3. final def ==(arg0: Any): Boolean
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  4. final def asInstanceOf[T0]: T0
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  5. def assertOutputsHaveNoConflictingExpressionIds(outputs: Seq[Seq[Attribute]]): Unit

    Assert that outputs don't have conflicting expression IDs.

  6. def clone(): AnyRef
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    @throws(classOf[java.lang.CloneNotSupportedException]) @IntrinsicCandidate() @native()
  7. def doOutputsHaveConflictingExpressionIds(outputs: Seq[Seq[Attribute]]): Boolean

    Check whether outputs have conflicting expression IDs.

    Check whether outputs have conflicting expression IDs. This is only relevant for child outputs of multi-child operators. Conflicting attributes are only checked between different child branches, since one branch may output the same attribute multiple times. Hence, we use only distinct expression IDs from each output.

    -- This is OK, one operator branch outputs its attribute multiple times
SELECT col1, col1 FROM t1;
    -- If both children of this [[Union]] operator output `col1` with the same expression ID,
-- the analyzer is broken.
SELECT col1 FROM t1
UNION ALL
SELECT col1 FROM t1
;

    One edge case is WithCTE - we don't have to check conflicts between CTERelationDefs and the plan itself.

  8. final def eq(arg0: AnyRef): Boolean
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  9. def equals(arg0: AnyRef): Boolean
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  10. final def getClass(): Class[_ <: AnyRef]
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  12. final def isInstanceOf[T0]: Boolean
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  13. final def ne(arg0: AnyRef): Boolean
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  14. final def notify(): Unit
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  15. final def notifyAll(): Unit
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  16. final def synchronized[T0](arg0: => T0): T0
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  18. final def wait(arg0: Long, arg1: Int): Unit
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  1. def finalize(): Unit
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    @throws(classOf[java.lang.Throwable]) @Deprecated
    Deprecated

    (Since version 9)

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