Class/Object

org.apache.spark.sql.execution

WholeStageCodegenExec

Related Docs: object WholeStageCodegenExec | package execution

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case class WholeStageCodegenExec(child: SparkPlan) extends SparkPlan with UnaryExecNode with CodegenSupport with Product with Serializable

WholeStageCodegen compile a subtree of plans that support codegen together into single Java function.

Here is the call graph of to generate Java source (plan A support codegen, but plan B does not):

WholeStageCodegen Plan A FakeInput Plan B

-> execute() | doExecute() ---------> inputRDDs() -------> inputRDDs() ------> execute() | +-----------------> produce() | doProduce() -------> produce() | doProduce() | doConsume() <--------- consume() | doConsume() <-------- consume()

SparkPlan A should override doProduce() and doConsume().

doCodeGen() will create a CodeGenContext, which will hold a list of variables for input, used to generated code for BoundReference.

Linear Supertypes
CodegenSupport, UnaryExecNode, SparkPlan, Serializable, Serializable, Logging, QueryPlan[SparkPlan], TreeNode[SparkPlan], Product, Equals, AnyRef, Any
Ordering
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  2. By Inheritance
Inherited
  1. WholeStageCodegenExec
  2. CodegenSupport
  3. UnaryExecNode
  4. SparkPlan
  5. Serializable
  6. Serializable
  7. Logging
  8. QueryPlan
  9. TreeNode
  10. Product
  11. Equals
  12. AnyRef
  13. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new WholeStageCodegenExec(child: SparkPlan)

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Value Members

  1. final def !=(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  4. lazy val allAttributes: AttributeSeq

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    Definition Classes
    QueryPlan
  5. def apply(number: Int): TreeNode[_]

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    Definition Classes
    TreeNode
  6. def argString: String

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    Definition Classes
    TreeNode
  7. def asCode: String

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    Definition Classes
    TreeNode
  8. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any
  9. lazy val canonicalized: SparkPlan

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    Definition Classes
    QueryPlan
  10. val child: SparkPlan

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    Definition Classes
    WholeStageCodegenExecUnaryExecNode
  11. final def children: Seq[SparkPlan]

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    Definition Classes
    UnaryExecNode → TreeNode
  12. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  13. def collect[B](pf: PartialFunction[SparkPlan, B]): Seq[B]

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    Definition Classes
    TreeNode
  14. def collectFirst[B](pf: PartialFunction[SparkPlan, B]): Option[B]

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    Definition Classes
    TreeNode
  15. def collectLeaves(): Seq[SparkPlan]

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    Definition Classes
    TreeNode
  16. lazy val constraints: ExpressionSet

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    Definition Classes
    QueryPlan
  17. final def consume(ctx: CodegenContext, outputVars: Seq[ExprCode], row: String = null): String

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    Consume the generated columns or row from current SparkPlan, call its parent's doConsume().

    Consume the generated columns or row from current SparkPlan, call its parent's doConsume().

    Definition Classes
    CodegenSupport
  18. lazy val containsChild: Set[TreeNode[_]]

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    Definition Classes
    TreeNode
  19. def doCodeGen(): (CodegenContext, CodeAndComment)

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    Generates code for this subtree.

    Generates code for this subtree.

    returns

    the tuple of the codegen context and the actual generated source.

  20. def doConsume(ctx: CodegenContext, input: Seq[ExprCode], row: ExprCode): String

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    Generate the Java source code to process the rows from child SparkPlan.

    Generate the Java source code to process the rows from child SparkPlan.

    This should be override by subclass to support codegen.

    For example, Filter will generate the code like this:

    # code to evaluate the predicate expression, result is isNull1 and value2 if (isNull1 || !value2) continue; # call consume(), which will call parent.doConsume()

    Note: A plan can either consume the rows as UnsafeRow (row), or a list of variables (input).

    Definition Classes
    WholeStageCodegenExecCodegenSupport
  21. def doExecute(): RDD[InternalRow]

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    Overridden by concrete implementations of SparkPlan.

    Overridden by concrete implementations of SparkPlan. Produces the result of the query as an RDD[InternalRow]

    Definition Classes
    WholeStageCodegenExecSparkPlan
  22. def doExecuteBroadcast[T](): Broadcast[T]

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    Overridden by concrete implementations of SparkPlan.

    Overridden by concrete implementations of SparkPlan. Produces the result of the query as a broadcast variable.

    Attributes
    protected[org.apache.spark.sql]
    Definition Classes
    SparkPlan
  23. def doPrepare(): Unit

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    Overridden by concrete implementations of SparkPlan.

    Overridden by concrete implementations of SparkPlan. It is guaranteed to run before any execute of SparkPlan. This is helpful if we want to set up some state before executing the query, e.g., BroadcastHashJoin uses it to broadcast asynchronously.

    Note: the prepare method has already walked down the tree, so the implementation doesn't need to call children's prepare methods.

    This will only be called once, protected by this.

    Attributes
    protected
    Definition Classes
    SparkPlan
  24. def doProduce(ctx: CodegenContext): String

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    Generate the Java source code to process, should be overridden by subclass to support codegen.

    Generate the Java source code to process, should be overridden by subclass to support codegen.

    doProduce() usually generate the framework, for example, aggregation could generate this:

    if (!initialized) { # create a hash map, then build the aggregation hash map # call child.produce() initialized = true; } while (hashmap.hasNext()) { row = hashmap.next(); # build the aggregation results # create variables for results # call consume(), which will call parent.doConsume() if (shouldStop()) return; }

    Definition Classes
    WholeStageCodegenExecCodegenSupport
  25. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  26. def evaluateRequiredVariables(attributes: Seq[Attribute], variables: Seq[ExprCode], required: AttributeSet): String

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    Returns source code to evaluate the variables for required attributes, and clear the code of evaluated variables, to prevent them to be evaluated twice.

    Returns source code to evaluate the variables for required attributes, and clear the code of evaluated variables, to prevent them to be evaluated twice.

    Attributes
    protected
    Definition Classes
    CodegenSupport
  27. def evaluateVariables(variables: Seq[ExprCode]): String

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    Returns source code to evaluate all the variables, and clear the code of them, to prevent them to be evaluated twice.

    Returns source code to evaluate all the variables, and clear the code of them, to prevent them to be evaluated twice.

    Attributes
    protected
    Definition Classes
    CodegenSupport
  28. final def execute(): RDD[InternalRow]

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    Returns the result of this query as an RDD[InternalRow] by delegating to doExecute after preparations.

    Returns the result of this query as an RDD[InternalRow] by delegating to doExecute after preparations.

    Concrete implementations of SparkPlan should override doExecute.

    Definition Classes
    SparkPlan
  29. final def executeBroadcast[T](): Broadcast[T]

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    Returns the result of this query as a broadcast variable by delegating to doExecuteBroadcast after preparations.

    Returns the result of this query as a broadcast variable by delegating to doExecuteBroadcast after preparations.

    Concrete implementations of SparkPlan should override doExecuteBroadcast.

    Definition Classes
    SparkPlan
  30. def executeCollect(): Array[InternalRow]

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    Runs this query returning the result as an array.

    Runs this query returning the result as an array.

    Definition Classes
    SparkPlan
  31. def executeCollectPublic(): Array[Row]

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    Runs this query returning the result as an array, using external Row format.

    Runs this query returning the result as an array, using external Row format.

    Definition Classes
    SparkPlan
  32. final def executeQuery[T](query: ⇒ T): T

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    Execute a query after preparing the query and adding query plan information to created RDDs for visualization.

    Execute a query after preparing the query and adding query plan information to created RDDs for visualization.

    Attributes
    protected
    Definition Classes
    SparkPlan
  33. def executeTake(n: Int): Array[InternalRow]

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    Runs this query returning the first n rows as an array.

    Runs this query returning the first n rows as an array.

    This is modeled after RDD.take but never runs any job locally on the driver.

    Definition Classes
    SparkPlan
  34. def executeToIterator(): Iterator[InternalRow]

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    Runs this query returning the result as an iterator of InternalRow.

    Runs this query returning the result as an iterator of InternalRow.

    Note: this will trigger multiple jobs (one for each partition).

    Definition Classes
    SparkPlan
  35. final def expressions: Seq[Expression]

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    Definition Classes
    QueryPlan
  36. def fastEquals(other: TreeNode[_]): Boolean

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    Definition Classes
    TreeNode
  37. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  38. def find(f: (SparkPlan) ⇒ Boolean): Option[SparkPlan]

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    Definition Classes
    TreeNode
  39. def flatMap[A](f: (SparkPlan) ⇒ TraversableOnce[A]): Seq[A]

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    Definition Classes
    TreeNode
  40. def foreach(f: (SparkPlan) ⇒ Unit): Unit

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    Definition Classes
    TreeNode
  41. def foreachUp(f: (SparkPlan) ⇒ Unit): Unit

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    Definition Classes
    TreeNode
  42. def generateTreeString(depth: Int, lastChildren: Seq[Boolean], builder: StringBuilder, verbose: Boolean, prefix: String = "", addSuffix: Boolean = false): StringBuilder

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    Definition Classes
    WholeStageCodegenExec → TreeNode
  43. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any
  44. def getRelevantConstraints(constraints: Set[Expression]): Set[Expression]

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    Attributes
    protected
    Definition Classes
    QueryPlan
  45. def hashCode(): Int

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    Definition Classes
    TreeNode → AnyRef → Any
  46. def initializeLogIfNecessary(isInterpreter: Boolean): Unit

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    Attributes
    protected
    Definition Classes
    Logging
  47. def innerChildren: Seq[QueryPlan[_]]

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    Attributes
    protected
    Definition Classes
    QueryPlan → TreeNode
  48. def inputRDDs(): Seq[RDD[InternalRow]]

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    Returns all the RDDs of InternalRow which generates the input rows.

    Returns all the RDDs of InternalRow which generates the input rows.

    Note: right now we support up to two RDDs.

    Definition Classes
    WholeStageCodegenExecCodegenSupport
  49. def inputSet: AttributeSet

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    Definition Classes
    QueryPlan
  50. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any
  51. def isShouldStopRequired: Boolean

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    For optimization to suppress shouldStop() in a loop of WholeStageCodegen.

    For optimization to suppress shouldStop() in a loop of WholeStageCodegen. Returning true means we need to insert shouldStop() into the loop producing rows, if any.

    Definition Classes
    CodegenSupport
  52. def isTraceEnabled(): Boolean

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    Attributes
    protected
    Definition Classes
    Logging
  53. def jsonFields: List[JField]

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    Attributes
    protected
    Definition Classes
    TreeNode
  54. def log: Logger

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    Attributes
    protected
    Definition Classes
    Logging
  55. def logDebug(msg: ⇒ String, throwable: Throwable): Unit

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    Attributes
    protected
    Definition Classes
    Logging
  56. def logDebug(msg: ⇒ String): Unit

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    Attributes
    protected
    Definition Classes
    Logging
  57. def logError(msg: ⇒ String, throwable: Throwable): Unit

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    Attributes
    protected
    Definition Classes
    Logging
  58. def logError(msg: ⇒ String): Unit

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    Attributes
    protected
    Definition Classes
    Logging
  59. def logInfo(msg: ⇒ String, throwable: Throwable): Unit

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    Attributes
    protected
    Definition Classes
    Logging
  60. def logInfo(msg: ⇒ String): Unit

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    Attributes
    protected
    Definition Classes
    Logging
  61. def logName: String

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    Attributes
    protected
    Definition Classes
    Logging
  62. def logTrace(msg: ⇒ String, throwable: Throwable): Unit

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    Attributes
    protected
    Definition Classes
    Logging
  63. def logTrace(msg: ⇒ String): Unit

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    Attributes
    protected
    Definition Classes
    Logging
  64. def logWarning(msg: ⇒ String, throwable: Throwable): Unit

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    Attributes
    protected
    Definition Classes
    Logging
  65. def logWarning(msg: ⇒ String): Unit

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    Attributes
    protected
    Definition Classes
    Logging
  66. def longMetric(name: String): SQLMetric

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    Return a LongSQLMetric according to the name.

    Return a LongSQLMetric according to the name.

    Definition Classes
    SparkPlan
  67. def makeCopy(newArgs: Array[AnyRef]): SparkPlan

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    Overridden make copy also propagates sqlContext to copied plan.

    Overridden make copy also propagates sqlContext to copied plan.

    Definition Classes
    SparkPlan → TreeNode
  68. def map[A](f: (SparkPlan) ⇒ A): Seq[A]

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    Definition Classes
    TreeNode
  69. def mapChildren(f: (SparkPlan) ⇒ SparkPlan): SparkPlan

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    Definition Classes
    TreeNode
  70. def mapExpressions(f: (Expression) ⇒ Expression): WholeStageCodegenExec.this.type

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    Definition Classes
    QueryPlan
  71. def mapProductIterator[B](f: (Any) ⇒ B)(implicit arg0: ClassTag[B]): Array[B]

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    Attributes
    protected
    Definition Classes
    TreeNode
  72. def metadata: Map[String, String]

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    Return all metadata that describes more details of this SparkPlan.

    Return all metadata that describes more details of this SparkPlan.

    Definition Classes
    SparkPlan
  73. def metricTerm(ctx: CodegenContext, name: String): String

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    Creates a metric using the specified name.

    Creates a metric using the specified name.

    returns

    name of the variable representing the metric

    Definition Classes
    CodegenSupport
  74. lazy val metrics: Map[String, SQLMetric]

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    Return all metrics containing metrics of this SparkPlan.

    Return all metrics containing metrics of this SparkPlan.

    Definition Classes
    WholeStageCodegenExecSparkPlan
  75. def missingInput: AttributeSet

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    Definition Classes
    QueryPlan
  76. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  77. def newMutableProjection(expressions: Seq[Expression], inputSchema: Seq[Attribute], useSubexprElimination: Boolean = false): MutableProjection

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    Attributes
    protected
    Definition Classes
    SparkPlan
  78. def newNaturalAscendingOrdering(dataTypes: Seq[DataType]): Ordering[InternalRow]

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    Creates a row ordering for the given schema, in natural ascending order.

    Creates a row ordering for the given schema, in natural ascending order.

    Attributes
    protected
    Definition Classes
    SparkPlan
  79. def newOrdering(order: Seq[SortOrder], inputSchema: Seq[Attribute]): Ordering[InternalRow]

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    Attributes
    protected
    Definition Classes
    SparkPlan
  80. def newPredicate(expression: Expression, inputSchema: Seq[Attribute]): Predicate

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    Attributes
    protected
    Definition Classes
    SparkPlan
  81. def nodeName: String

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    Definition Classes
    TreeNode
  82. final def notify(): Unit

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    Definition Classes
    AnyRef
  83. final def notifyAll(): Unit

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    Definition Classes
    AnyRef
  84. def numberedTreeString: String

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    Definition Classes
    TreeNode
  85. val origin: Origin

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    Definition Classes
    TreeNode
  86. def otherCopyArgs: Seq[AnyRef]

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    Attributes
    protected
    Definition Classes
    TreeNode
  87. def output: Seq[Attribute]

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    Definition Classes
    WholeStageCodegenExec → QueryPlan
  88. def outputOrdering: Seq[SortOrder]

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    Specifies how data is ordered in each partition.

    Specifies how data is ordered in each partition.

    Definition Classes
    WholeStageCodegenExecSparkPlan
  89. def outputPartitioning: Partitioning

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    Specifies how data is partitioned across different nodes in the cluster.

    Specifies how data is partitioned across different nodes in the cluster.

    Definition Classes
    WholeStageCodegenExecSparkPlan
  90. def outputSet: AttributeSet

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    Definition Classes
    QueryPlan
  91. def p(number: Int): SparkPlan

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    Definition Classes
    TreeNode
  92. var parent: CodegenSupport

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    Which SparkPlan is calling produce() of this one.

    Which SparkPlan is calling produce() of this one. It's itself for the first SparkPlan.

    Attributes
    protected
    Definition Classes
    CodegenSupport
  93. def preCanonicalized: SparkPlan

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    Attributes
    protected
    Definition Classes
    QueryPlan
  94. final def prepare(): Unit

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    Prepare a SparkPlan for execution.

    Prepare a SparkPlan for execution. It's idempotent.

    Definition Classes
    SparkPlan
  95. def prepareSubqueries(): Unit

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    Finds scalar subquery expressions in this plan node and starts evaluating them.

    Finds scalar subquery expressions in this plan node and starts evaluating them.

    Attributes
    protected
    Definition Classes
    SparkPlan
  96. def prettyJson: String

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    Definition Classes
    TreeNode
  97. def printSchema(): Unit

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    Definition Classes
    QueryPlan
  98. final def produce(ctx: CodegenContext, parent: CodegenSupport): String

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    Returns Java source code to process the rows from input RDD.

    Returns Java source code to process the rows from input RDD.

    Definition Classes
    CodegenSupport
  99. def producedAttributes: AttributeSet

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    Definition Classes
    QueryPlan
  100. def references: AttributeSet

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    Definition Classes
    QueryPlan
  101. def requiredChildDistribution: Seq[Distribution]

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    Specifies any partition requirements on the input data for this operator.

    Specifies any partition requirements on the input data for this operator.

    Definition Classes
    SparkPlan
  102. def requiredChildOrdering: Seq[Seq[SortOrder]]

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    Specifies sort order for each partition requirements on the input data for this operator.

    Specifies sort order for each partition requirements on the input data for this operator.

    Definition Classes
    SparkPlan
  103. def resetMetrics(): Unit

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    Reset all the metrics.

    Reset all the metrics.

    Definition Classes
    SparkPlan
  104. final def sameResult(other: SparkPlan): Boolean

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    Definition Classes
    QueryPlan
  105. lazy val schema: StructType

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    Definition Classes
    QueryPlan
  106. def schemaString: String

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    Definition Classes
    QueryPlan
  107. final def semanticHash(): Int

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    Definition Classes
    QueryPlan
  108. def shouldStopRequired: Boolean

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    Set to false if this plan consumes all rows produced by children but doesn't output row to buffer by calling append(), so the children don't require shouldStop() in the loop of producing rows.

    Set to false if this plan consumes all rows produced by children but doesn't output row to buffer by calling append(), so the children don't require shouldStop() in the loop of producing rows.

    Attributes
    protected
    Definition Classes
    CodegenSupport
  109. def simpleString: String

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    Definition Classes
    QueryPlan → TreeNode
  110. def sparkContext: SparkContext

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    Attributes
    protected
    Definition Classes
    SparkPlan
  111. final val sqlContext: SQLContext

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    A handle to the SQL Context that was used to create this plan.

    A handle to the SQL Context that was used to create this plan. Since many operators need access to the sqlContext for RDD operations or configuration this field is automatically populated by the query planning infrastructure.

    Definition Classes
    SparkPlan
  112. def statePrefix: String

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    Attributes
    protected
    Definition Classes
    QueryPlan
  113. def stringArgs: Iterator[Any]

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    Attributes
    protected
    Definition Classes
    TreeNode
  114. val subexpressionEliminationEnabled: Boolean

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    Definition Classes
    SparkPlan
  115. def subqueries: Seq[SparkPlan]

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    Definition Classes
    QueryPlan
  116. def supportCodegen: Boolean

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    Whether this SparkPlan support whole stage codegen or not.

    Whether this SparkPlan support whole stage codegen or not.

    Definition Classes
    CodegenSupport
  117. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef
  118. def toJSON: String

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    Definition Classes
    TreeNode
  119. def toString(): String

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    Definition Classes
    TreeNode → AnyRef → Any
  120. def transform(rule: PartialFunction[SparkPlan, SparkPlan]): SparkPlan

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    Definition Classes
    TreeNode
  121. def transformAllExpressions(rule: PartialFunction[Expression, Expression]): WholeStageCodegenExec.this.type

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    Definition Classes
    QueryPlan
  122. def transformDown(rule: PartialFunction[SparkPlan, SparkPlan]): SparkPlan

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    Definition Classes
    TreeNode
  123. def transformExpressions(rule: PartialFunction[Expression, Expression]): WholeStageCodegenExec.this.type

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    Definition Classes
    QueryPlan
  124. def transformExpressionsDown(rule: PartialFunction[Expression, Expression]): WholeStageCodegenExec.this.type

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    Definition Classes
    QueryPlan
  125. def transformExpressionsUp(rule: PartialFunction[Expression, Expression]): WholeStageCodegenExec.this.type

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    Definition Classes
    QueryPlan
  126. def transformUp(rule: PartialFunction[SparkPlan, SparkPlan]): SparkPlan

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    Definition Classes
    TreeNode
  127. def treeString(verbose: Boolean, addSuffix: Boolean): String

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    Definition Classes
    TreeNode
  128. def treeString: String

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    Definition Classes
    TreeNode
  129. def usedInputs: AttributeSet

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    The subset of inputSet those should be evaluated before this plan.

    The subset of inputSet those should be evaluated before this plan.

    We will use this to insert some code to access those columns that are actually used by current plan before calling doConsume().

    Definition Classes
    CodegenSupport
  130. def validConstraints: Set[Expression]

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    Attributes
    protected
    Definition Classes
    QueryPlan
  131. def verboseString: String

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    Definition Classes
    QueryPlan → TreeNode
  132. def verboseStringWithSuffix: String

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    Definition Classes
    TreeNode
  133. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  134. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  135. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  136. def waitForSubqueries(): Unit

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    Blocks the thread until all subqueries finish evaluation and update the results.

    Blocks the thread until all subqueries finish evaluation and update the results.

    Attributes
    protected
    Definition Classes
    SparkPlan
  137. def withNewChildren(newChildren: Seq[SparkPlan]): SparkPlan

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    Definition Classes
    TreeNode

Inherited from CodegenSupport

Inherited from UnaryExecNode

Inherited from SparkPlan

Inherited from Serializable

Inherited from Serializable

Inherited from Logging

Inherited from QueryPlan[SparkPlan]

Inherited from TreeNode[SparkPlan]

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any

Ungrouped