Packages

c

org.apache.spark.sql.execution

ColumnarCachedBatchSerializer

class ColumnarCachedBatchSerializer extends CachedBatchSerializer with SQLConfHelper

Feature: 1. This serializer supports column pruning 2. TODO: support push down filter 3. Super TODO: support store offheap object directly

The data transformation pipeline:

  • Serializer ColumnarBatch -> CachedColumnarBatch -> serialize to byte[]
  • Deserializer CachedColumnarBatch -> ColumnarBatch -> deserialize to byte[] to create Velox ColumnarBatch
  • Serializer InternalRow -> CachedColumnarBatch (support RowToColumnar) -> Convert InternalRow to ColumnarBatch -> Serializer ColumnarBatch -> CachedColumnarBatch
  • Serializer InternalRow -> DefaultCachedBatch (unsupport RowToColumnar) -> Convert InternalRow to DefaultCachedBatch using vanilla Spark serializer
  • Deserializer CachedColumnarBatch -> InternalRow (support ColumnarToRow) -> Deserializer CachedColumnarBatch -> ColumnarBatch -> Convert ColumnarBatch to InternalRow
  • Deserializer DefaultCachedBatch -> InternalRow (unsupport ColumnarToRow) -> Convert DefaultCachedBatch to InternalRow using vanilla Spark serializer
Linear Supertypes
SQLConfHelper, CachedBatchSerializer, Serializable, Serializable, AnyRef, Any
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. ColumnarCachedBatchSerializer
  2. SQLConfHelper
  3. CachedBatchSerializer
  4. Serializable
  5. Serializable
  6. AnyRef
  7. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new ColumnarCachedBatchSerializer()

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##(): Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def buildFilter(predicates: Seq[Expression], cachedAttributes: Seq[Attribute]): (Int, Iterator[CachedBatch]) ⇒ Iterator[CachedBatch]
    Definition Classes
    ColumnarCachedBatchSerializer → CachedBatchSerializer
  6. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  7. def conf: SQLConf
    Definition Classes
    SQLConfHelper
  8. def convertCachedBatchToColumnarBatch(input: RDD[CachedBatch], cacheAttributes: Seq[Attribute], selectedAttributes: Seq[Attribute], conf: SQLConf): RDD[ColumnarBatch]
    Definition Classes
    ColumnarCachedBatchSerializer → CachedBatchSerializer
  9. def convertCachedBatchToInternalRow(input: RDD[CachedBatch], cacheAttributes: Seq[Attribute], selectedAttributes: Seq[Attribute], conf: SQLConf): RDD[InternalRow]
    Definition Classes
    ColumnarCachedBatchSerializer → CachedBatchSerializer
  10. def convertColumnarBatchToCachedBatch(input: RDD[ColumnarBatch], schema: Seq[Attribute], storageLevel: StorageLevel, conf: SQLConf): RDD[CachedBatch]
    Definition Classes
    ColumnarCachedBatchSerializer → CachedBatchSerializer
  11. def convertInternalRowToCachedBatch(input: RDD[InternalRow], schema: Seq[Attribute], storageLevel: StorageLevel, conf: SQLConf): RDD[CachedBatch]
    Definition Classes
    ColumnarCachedBatchSerializer → CachedBatchSerializer
  12. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  13. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  14. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  15. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  16. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  17. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  18. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  19. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  20. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  21. def supportsColumnarInput(schema: Seq[Attribute]): Boolean
    Definition Classes
    ColumnarCachedBatchSerializer → CachedBatchSerializer
  22. def supportsColumnarOutput(schema: StructType): Boolean
    Definition Classes
    ColumnarCachedBatchSerializer → CachedBatchSerializer
  23. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  24. def toString(): String
    Definition Classes
    AnyRef → Any
  25. def vectorTypes(attributes: Seq[Attribute], conf: SQLConf): Option[Seq[String]]
    Definition Classes
    CachedBatchSerializer
  26. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  27. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  28. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()

Inherited from SQLConfHelper

Inherited from CachedBatchSerializer

Inherited from Serializable

Inherited from Serializable

Inherited from AnyRef

Inherited from Any

Ungrouped