org.apache.spark.sql.execution

Limit

case class Limit(limit: Int, child: SparkPlan) extends SparkPlan with UnaryNode with Product with Serializable

:: DeveloperApi :: Take the first limit elements. Note that the implementation is different depending on whether this is a terminal operator or not. If it is terminal and is invoked using executeCollect, this operator uses something similar to Spark's take method on the Spark driver. If it is not terminal or is invoked using execute, we first take the limit on each partition, and then repartition all the data to a single partition to compute the global limit.

Annotations
@DeveloperApi()
Linear Supertypes
Product, Equals, UnaryNode, catalyst.trees.UnaryNode[SparkPlan], SparkPlan, Serializable, Serializable, Logging, QueryPlan[SparkPlan], TreeNode[SparkPlan], AnyRef, Any
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Inherited
  1. Limit
  2. Product
  3. Equals
  4. UnaryNode
  5. UnaryNode
  6. SparkPlan
  7. Serializable
  8. Serializable
  9. Logging
  10. QueryPlan
  11. TreeNode
  12. AnyRef
  13. Any
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Visibility
  1. Public
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Instance Constructors

  1. new Limit(limit: Int, child: SparkPlan)

Value Members

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

    Definition Classes
    AnyRef
  2. final def !=(arg0: Any): Boolean

    Definition Classes
    Any
  3. final def ##(): Int

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

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

    Definition Classes
    Any
  6. def apply(number: Int): SparkPlan

    Definition Classes
    TreeNode
  7. def argString: String

    Definition Classes
    TreeNode
  8. def asCode: String

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

    Definition Classes
    Any
  10. val child: SparkPlan

    Definition Classes
    Limit → UnaryNode
  11. def children: List[SparkPlan]

    Definition Classes
    UnaryNode
  12. def clone(): AnyRef

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  13. val codegenEnabled: Boolean

    Definition Classes
    SparkPlan
  14. def collect[B](pf: PartialFunction[SparkPlan, B]): Seq[B]

    Definition Classes
    TreeNode
  15. final def eq(arg0: AnyRef): Boolean

    Definition Classes
    AnyRef
  16. def execute(): RDD[catalyst.expressions.Row]

    Runs this query returning the result as an RDD.

    Runs this query returning the result as an RDD.

    Definition Classes
    LimitSparkPlan
  17. def executeCollect(): Array[catalyst.expressions.Row]

    A custom implementation modeled after the take function on RDDs but which never runs any job locally.

    A custom implementation modeled after the take function on RDDs but which never runs any job locally. This is to avoid shipping an entire partition of data in order to retrieve only a few rows.

    Definition Classes
    LimitSparkPlan
  18. def expressions: Seq[Expression]

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

    Definition Classes
    TreeNode
  20. def finalize(): Unit

    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  21. def flatMap[A](f: (SparkPlan) ⇒ TraversableOnce[A]): Seq[A]

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

    Definition Classes
    TreeNode
  23. def generateTreeString(depth: Int, builder: StringBuilder): StringBuilder

    Attributes
    protected
    Definition Classes
    TreeNode
  24. final def getClass(): Class[_]

    Definition Classes
    AnyRef → Any
  25. def getNodeNumbered(number: MutableInt): SparkPlan

    Attributes
    protected
    Definition Classes
    TreeNode
  26. def inputSet: AttributeSet

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

    Definition Classes
    Any
  28. def isTraceEnabled(): Boolean

    Attributes
    protected
    Definition Classes
    Logging
  29. val limit: Int

  30. def log: Logger

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

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

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

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

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

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

    Attributes
    protected
    Definition Classes
    Logging
  37. def logName: String

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

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

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

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

    Attributes
    protected
    Definition Classes
    Logging
  42. def makeCopy(newArgs: Array[AnyRef]): Limit.this.type

    Overridden make copy also propogates sqlContext to copied plan.

    Overridden make copy also propogates sqlContext to copied plan.

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

    Definition Classes
    TreeNode
  44. def mapChildren(f: (SparkPlan) ⇒ SparkPlan): Limit.this.type

    Definition Classes
    TreeNode
  45. def missingInput: AttributeSet

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

    Definition Classes
    AnyRef
  47. def newMutableProjection(expressions: Seq[Expression], inputSchema: Seq[Attribute]): () ⇒ MutableProjection

    Attributes
    protected
    Definition Classes
    SparkPlan
  48. def newOrdering(order: Seq[SortOrder], inputSchema: Seq[Attribute]): Ordering[catalyst.expressions.Row]

    Attributes
    protected
    Definition Classes
    SparkPlan
  49. def newPredicate(expression: Expression, inputSchema: Seq[Attribute]): (catalyst.expressions.Row) ⇒ Boolean

    Attributes
    protected
    Definition Classes
    SparkPlan
  50. def newProjection(expressions: Seq[Expression], inputSchema: Seq[Attribute]): Projection

    Attributes
    protected
    Definition Classes
    SparkPlan
  51. def nodeName: String

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

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

    Definition Classes
    AnyRef
  54. def numberedTreeString: String

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

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

    Definition Classes
    Limit → QueryPlan
  57. def outputPartitioning: SinglePartition.type

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

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

    Definition Classes
    Limit → UnaryNode → SparkPlan
  58. def outputSet: AttributeSet

    Definition Classes
    QueryPlan
  59. def printSchema(): Unit

    Definition Classes
    QueryPlan
  60. def references: AttributeSet

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

    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
  62. def schema: catalyst.types.StructType

    Definition Classes
    QueryPlan
  63. def schemaString: String

    Definition Classes
    QueryPlan
  64. def simpleString: String

    Definition Classes
    QueryPlan → TreeNode
  65. def sparkContext: SparkContext

    Attributes
    protected
    Definition Classes
    SparkPlan
  66. val sqlContext: SQLContext

    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.

    Attributes
    protected[org.apache.spark]
    Definition Classes
    SparkPlan
  67. def statePrefix: String

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

    Attributes
    protected
    Definition Classes
    TreeNode
  69. final def synchronized[T0](arg0: ⇒ T0): T0

    Definition Classes
    AnyRef
  70. def toString(): String

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

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

    Definition Classes
    QueryPlan
  73. def transformChildrenDown(rule: PartialFunction[SparkPlan, SparkPlan]): Limit.this.type

    Definition Classes
    TreeNode
  74. def transformChildrenUp(rule: PartialFunction[SparkPlan, SparkPlan]): Limit.this.type

    Definition Classes
    TreeNode
  75. def transformDown(rule: PartialFunction[SparkPlan, SparkPlan]): SparkPlan

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

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

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

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

    Definition Classes
    TreeNode
  80. def treeString: String

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

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

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

    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  84. def withNewChildren(newChildren: Seq[SparkPlan]): Limit.this.type

    Definition Classes
    TreeNode

Inherited from Product

Inherited from Equals

Inherited from UnaryNode

Inherited from catalyst.trees.UnaryNode[SparkPlan]

Inherited from SparkPlan

Inherited from Serializable

Inherited from Serializable

Inherited from Logging

Inherited from QueryPlan[SparkPlan]

Inherited from TreeNode[SparkPlan]

Inherited from AnyRef

Inherited from Any

Ungrouped