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t

org.apache.spark.sql.catalyst.analysis.resolver

DelegatesResolutionToExtensions

trait DelegatesResolutionToExtensions extends AnyRef

The DelegatesResolutionToExtensions is a trait which provides a method to delegate the resolution of unresolved operators to a list of ResolverExtensions.

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AnyRef, Any
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MetadataResolver, Resolver
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  1. abstract val extensions: Seq[ResolverExtension]
    Attributes
    protected

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  1. final def !=(arg0: Any): Boolean
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  15. def toString(): String
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  16. def tryDelegateResolutionToExtension(unresolvedOperator: LogicalPlan, resolver: LogicalPlanResolver): Option[LogicalPlan]

    Find the suitable extension for unresolvedOperator resolution and resolve it with that extension.

    Find the suitable extension for unresolvedOperator resolution and resolve it with that extension. Usually extensions return resolved relation nodes, so we generically update the name scope without matching for specific relations, for simplicity.

    We match the extension once to reduce the number of ResolverExtension.resolveOperator.isDefinedAt calls, because those can be expensive.

    returns

    Some(resolutionResult) if the extension was found and unresolvedOperator was resolved, None otherwise.

    Attributes
    protected
    Exceptions thrown

    `AMBIGUOUS_RESOLVER_EXTENSION` if there were several matched extensions for this operator.

  17. final def wait(arg0: Long, arg1: Int): Unit
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  18. final def wait(arg0: Long): Unit
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  19. final def wait(): 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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