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object SchemaPruning extends SQLConfHelper

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SQLConfHelper, AnyRef, Any
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Type Members

  1. case class RootField(field: StructField, derivedFromAtt: Boolean, prunedIfAnyChildAccessed: Boolean = false) extends Product with Serializable

    This represents a "root" schema field (aka top-level, no-parent).

    This represents a "root" schema field (aka top-level, no-parent). field is the StructField for field name and datatype. derivedFromAtt indicates whether it was derived from an attribute or had a proper child. prunedIfAnyChildAccessed means whether this root field can be pruned if any of child field is used in the query.

Value Members

  1. final def !=(arg0: Any): Boolean
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  2. final def ##(): Int
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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 clone(): AnyRef
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    protected[lang]
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    @throws( ... ) @native() @HotSpotIntrinsicCandidate()
  6. def conf: SQLConf

    The active config object within the current scope.

    The active config object within the current scope. See SQLConf.get for more information.

    Definition Classes
    SQLConfHelper
  7. final def eq(arg0: AnyRef): Boolean
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  8. def equals(arg0: Any): Boolean
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  9. final def getClass(): Class[_]
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    @native() @HotSpotIntrinsicCandidate()
  10. def hashCode(): Int
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    @native() @HotSpotIntrinsicCandidate()
  11. def identifyRootFields(projects: Seq[NamedExpression], filters: Seq[Expression]): Seq[RootField]

    Returns the set of fields from projection and filtering predicates that the query plan needs.

  12. final def isInstanceOf[T0]: Boolean
    Definition Classes
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  13. final def ne(arg0: AnyRef): Boolean
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  14. final def notify(): Unit
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    @native() @HotSpotIntrinsicCandidate()
  15. final def notifyAll(): Unit
    Definition Classes
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    @native() @HotSpotIntrinsicCandidate()
  16. def pruneDataSchema(dataSchema: StructType, requestedRootFields: Seq[RootField]): StructType

    Prunes the nested schema by the requested fields.

    Prunes the nested schema by the requested fields. For example, if the schema is: id int, s struct<a:int, b:int>, and given requested field "s.a", the inner field "b" is pruned in the returned schema: id int, s struct<a:int>. Note that:

    1. The schema field ordering at original schema is still preserved in pruned schema. 2. The top-level fields are not pruned here.
  17. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
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  18. def toString(): String
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  19. final def wait(arg0: Long, arg1: Int): Unit
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    @throws( ... )
  20. final def wait(arg0: Long): Unit
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    @throws( ... ) @native()
  21. final def wait(): Unit
    Definition Classes
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    @throws( ... )

Deprecated Value Members

  1. def finalize(): Unit
    Attributes
    protected[lang]
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    @throws( classOf[java.lang.Throwable] ) @Deprecated
    Deprecated

Inherited from SQLConfHelper

Inherited from AnyRef

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