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org.apache.spark.sql.execution.streaming

StreamingSymmetricHashJoinExec

case class StreamingSymmetricHashJoinExec(leftKeys: Seq[Expression], rightKeys: Seq[Expression], joinType: JoinType, condition: JoinConditionSplitPredicates, stateInfo: Option[StatefulOperatorStateInfo], eventTimeWatermarkForLateEvents: Option[Long], eventTimeWatermarkForEviction: Option[Long], stateWatermarkPredicates: JoinStateWatermarkPredicates, stateFormatVersion: Int, left: SparkPlan, right: SparkPlan) extends SparkPlan with BinaryExecNode with StateStoreWriter with Product with Serializable

Performs stream-stream join using symmetric hash join algorithm. It works as follows.

/-----------------------\ left side input --------->| left side state |------\ \-----------------------/ | |--------> joined output /-----------------------\ | right side input -------->| right side state |------/ \-----------------------/

Each join side buffers past input rows as streaming state so that the past input can be joined with future input on the other side. This buffer state is effectively a multi-map: equi-join key -> list of past input rows received with the join key

For each input row in each side, the following operations take place. - Calculate join key from the row. - Use the join key to append the row to the buffer state of the side that the row came from. - Find past buffered values for the key from the other side. For each such value, emit the "joined row" (left-row, right-row) - Apply the optional condition to filter the joined rows as the final output.

If a timestamp column with event time watermark is present in the join keys or in the input data, then it uses the watermark to figure out which rows in the buffer will not join with the new data, and therefore can be discarded. Depending on the provided query conditions, we can define thresholds on both state key (i.e. joining keys) and state value (i.e. input rows). There are three kinds of queries possible regarding this as explained below. Assume that watermark has been defined on both leftTime and rightTime columns used below.

1. When timestamp/time-window + watermark is in the join keys. Example (pseudo-SQL):

SELECT * FROM leftTable, rightTable ON leftKey = rightKey AND window(leftTime, "1 hour") = window(rightTime, "1 hour") // 1hr tumbling windows

In this case, this operator will join rows newer than watermark which fall in the same 1 hour window. Say the event-time watermark is "12:34" (both left and right input). Then input rows can only have time > 12:34. Hence, they can only join with buffered rows where window >= 12:00 - 1:00 and all buffered rows with join window < 12:00 can be discarded. In other words, the operator will discard all state where window in state key (i.e. join key) < event time watermark. This threshold is called State Key Watermark.

2. When timestamp range conditions are provided (no time/window + watermark in join keys). E.g.

SELECT * FROM leftTable, rightTable ON leftKey = rightKey AND leftTime > rightTime - INTERVAL 8 MINUTES AND leftTime < rightTime + INTERVAL 1 HOUR

In this case, the event-time watermark and the BETWEEN condition can be used to calculate a state watermark, i.e., time threshold for the state rows that can be discarded. For example, say each join side has a time column, named "leftTime" and "rightTime", and there is a join condition "leftTime > rightTime - 8 min". While processing, say the watermark on right input is "12:34". This means that from henceforth, only right inputs rows with "rightTime > 12:34" will be processed, and any older rows will be considered as "too late" and therefore dropped. Then, the left side buffer only needs to keep rows where "leftTime > rightTime - 8 min > 12:34 - 8m > 12:26". That is, the left state watermark is 12:26, and any rows older than that can be dropped from the state. In other words, the operator will discard all state where timestamp in state value (input rows) < state watermark. This threshold is called State Value Watermark (to distinguish from the state key watermark).

Note:

  • The event watermark value of one side is used to calculate the state watermark of the other side. That is, a condition ~ "leftTime > rightTime + X" with right side event watermark is used to calculate the left side state watermark. Conversely, a condition ~ "left < rightTime + Y" with left side event watermark is used to calculate right side state watermark.
  • Depending on the conditions, the state watermark maybe different for the left and right side. In the above example, leftTime > 12:26 AND rightTime > 12:34 - 1 hour = 11:34.
  • State can be dropped from BOTH sides only when there are conditions of the above forms that define time bounds on timestamp in both directions.

3. When both window in join key and time range conditions are present, case 1 + 2. In this case, since window equality is a stricter condition than the time range, we can use the State Key Watermark = event time watermark to discard state (similar to case 1).

leftKeys

Expression to generate key rows for joining from left input

rightKeys

Expression to generate key rows for joining from right input

joinType

Type of join (inner, left outer, etc.)

condition

Conditions to filter rows, split by left, right, and joined. See JoinConditionSplitPredicates

stateInfo

Version information required to read join state (buffered rows)

eventTimeWatermarkForLateEvents

Watermark for filtering late events, same for both sides

eventTimeWatermarkForEviction

Watermark for state eviction

stateWatermarkPredicates

Predicates for removal of state, see JoinStateWatermarkPredicates

left

Left child plan

right

Right child plan

Linear Supertypes
StateStoreWriter, PythonSQLMetrics, StatefulOperator, BinaryExecNode, BinaryLike[SparkPlan], SparkPlan, Serializable, Logging, QueryPlan[SparkPlan], SQLConfHelper, TreeNode[SparkPlan], WithOrigin, TreePatternBits, Product, Equals, AnyRef, Any
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Inherited
  1. StreamingSymmetricHashJoinExec
  2. StateStoreWriter
  3. PythonSQLMetrics
  4. StatefulOperator
  5. BinaryExecNode
  6. BinaryLike
  7. SparkPlan
  8. Serializable
  9. Logging
  10. QueryPlan
  11. SQLConfHelper
  12. TreeNode
  13. WithOrigin
  14. TreePatternBits
  15. Product
  16. Equals
  17. AnyRef
  18. Any
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Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new StreamingSymmetricHashJoinExec(leftKeys: Seq[Expression], rightKeys: Seq[Expression], joinType: JoinType, condition: Option[Expression], stateFormatVersion: Int, left: SparkPlan, right: SparkPlan)
  2. new StreamingSymmetricHashJoinExec(leftKeys: Seq[Expression], rightKeys: Seq[Expression], joinType: JoinType, condition: JoinConditionSplitPredicates, stateInfo: Option[StatefulOperatorStateInfo], eventTimeWatermarkForLateEvents: Option[Long], eventTimeWatermarkForEviction: Option[Long], stateWatermarkPredicates: JoinStateWatermarkPredicates, stateFormatVersion: Int, left: SparkPlan, right: SparkPlan)

    leftKeys

    Expression to generate key rows for joining from left input

    rightKeys

    Expression to generate key rows for joining from right input

    joinType

    Type of join (inner, left outer, etc.)

    condition

    Conditions to filter rows, split by left, right, and joined. See JoinConditionSplitPredicates

    stateInfo

    Version information required to read join state (buffered rows)

    eventTimeWatermarkForLateEvents

    Watermark for filtering late events, same for both sides

    eventTimeWatermarkForEviction

    Watermark for state eviction

    stateWatermarkPredicates

    Predicates for removal of state, see JoinStateWatermarkPredicates

    left

    Left child plan

    right

    Right child plan

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. lazy val allAttributes: AttributeSeq
    Definition Classes
    QueryPlan
  5. def apply(number: Int): TreeNode[_]
    Definition Classes
    TreeNode
  6. def applyRemovingRowsOlderThanWatermark(iter: Iterator[InternalRow], predicateDropRowByWatermark: BasePredicate): Iterator[InternalRow]
    Attributes
    protected
    Definition Classes
    StateStoreWriter
  7. def argString(maxFields: Int): String
    Definition Classes
    TreeNode
  8. def asCode: String
    Definition Classes
    TreeNode
  9. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  10. final lazy val canonicalized: SparkPlan
    Definition Classes
    QueryPlan
    Annotations
    @transient()
  11. final lazy val children: Seq[SparkPlan]
    Definition Classes
    BinaryLike
    Annotations
    @transient()
  12. def cleanupResources(): Unit

    Cleans up the resources used by the physical operator (if any).

    Cleans up the resources used by the physical operator (if any). In general, all the resources should be cleaned up when the task finishes but operators like SortMergeJoinExec and LimitExec may want eager cleanup to free up tight resources (e.g., memory).

    Attributes
    protected[sql]
    Definition Classes
    SparkPlan
  13. def clone(): SparkPlan
    Definition Classes
    TreeNode → AnyRef
  14. def collect[B](pf: PartialFunction[SparkPlan, B]): Seq[B]
    Definition Classes
    TreeNode
  15. def collectFirst[B](pf: PartialFunction[SparkPlan, B]): Option[B]
    Definition Classes
    TreeNode
  16. def collectLeaves(): Seq[SparkPlan]
    Definition Classes
    TreeNode
  17. def collectWithSubqueries[B](f: PartialFunction[SparkPlan, B]): Seq[B]
    Definition Classes
    QueryPlan
  18. val condition: JoinConditionSplitPredicates
  19. def conf: SQLConf
    Definition Classes
    SparkPlan → SQLConfHelper
  20. final def containsAllPatterns(patterns: TreePattern*): Boolean
    Definition Classes
    TreePatternBits
  21. final def containsAnyPattern(patterns: TreePattern*): Boolean
    Definition Classes
    TreePatternBits
  22. lazy val containsChild: Set[TreeNode[_]]
    Definition Classes
    TreeNode
  23. final def containsPattern(t: TreePattern): Boolean
    Definition Classes
    TreePatternBits
    Annotations
    @inline()
  24. def copyTagsFrom(other: SparkPlan): Unit
    Definition Classes
    TreeNode
  25. def customStatefulOperatorMetrics: Seq[StatefulOperatorCustomMetric]

    Set of stateful operator custom metrics.

    Set of stateful operator custom metrics. These are captured as part of the generic key-value map StateOperatorProgress.customMetrics. Stateful operators can extend this method to provide their own unique custom metrics.

    Definition Classes
    StreamingSymmetricHashJoinExec → StateStoreWriter
  26. lazy val deterministic: Boolean
    Definition Classes
    QueryPlan
  27. def doCanonicalize(): SparkPlan
    Attributes
    protected
    Definition Classes
    QueryPlan
  28. def doExecute(): RDD[InternalRow]

    Produces the result of the query as an RDD[InternalRow]

    Produces the result of the query as an RDD[InternalRow]

    Overridden by concrete implementations of SparkPlan.

    Attributes
    protected
    Definition Classes
    StreamingSymmetricHashJoinExec → SparkPlan
  29. def doExecuteBroadcast[T](): Broadcast[T]

    Produces the result of the query as a broadcast variable.

    Produces the result of the query as a broadcast variable.

    Overridden by concrete implementations of SparkPlan.

    Attributes
    protected[sql]
    Definition Classes
    SparkPlan
  30. def doExecuteColumnar(): RDD[ColumnarBatch]

    Produces the result of the query as an RDD[ColumnarBatch] if supportsColumnar returns true.

    Produces the result of the query as an RDD[ColumnarBatch] if supportsColumnar returns true. By convention the executor that creates a ColumnarBatch is responsible for closing it when it is no longer needed. This allows input formats to be able to reuse batches if needed.

    Attributes
    protected
    Definition Classes
    SparkPlan
  31. def doExecuteWrite(writeFilesSpec: WriteFilesSpec): RDD[WriterCommitMessage]

    Produces the result of the writes as an RDD[WriterCommitMessage]

    Produces the result of the writes as an RDD[WriterCommitMessage]

    Overridden by concrete implementations of SparkPlan.

    Attributes
    protected
    Definition Classes
    SparkPlan
  32. def doPrepare(): Unit

    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.

    Attributes
    protected
    Definition Classes
    SparkPlan
    Note

    prepare method has already walked down the tree, so the implementation doesn't have to call children's prepare methods. This will only be called once, protected by this.

  33. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  34. val eventTimeWatermarkForEviction: Option[Long]
  35. val eventTimeWatermarkForLateEvents: Option[Long]
  36. final def execute(): RDD[InternalRow]

    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
  37. final def executeBroadcast[T](): Broadcast[T]

    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
  38. def executeCollect(): Array[InternalRow]

    Runs this query returning the result as an array.

    Runs this query returning the result as an array.

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

    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
  40. final def executeColumnar(): RDD[ColumnarBatch]

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

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

    Concrete implementations of SparkPlan should override doColumnarExecute if supportsColumnar returns true.

    Definition Classes
    SparkPlan
  41. final def executeQuery[T](query: => T): T

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

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

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

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

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

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

    Definition Classes
    SparkPlan
  43. def executeTake(n: Int): Array[InternalRow]

    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
  44. def executeToIterator(): Iterator[InternalRow]

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

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

    Definition Classes
    SparkPlan
    Note

    Triggers multiple jobs (one for each partition).

  45. def executeWrite(writeFilesSpec: WriteFilesSpec): RDD[WriterCommitMessage]

    Returns the result of writes as an RDD[WriterCommitMessage] variable by delegating to doExecuteWrite after preparations.

    Returns the result of writes as an RDD[WriterCommitMessage] variable by delegating to doExecuteWrite after preparations.

    Concrete implementations of SparkPlan should override doExecuteWrite.

    Definition Classes
    SparkPlan
  46. def exists(f: (SparkPlan) => Boolean): Boolean
    Definition Classes
    TreeNode
  47. final def expressions: Seq[Expression]
    Definition Classes
    QueryPlan
  48. def fastEquals(other: TreeNode[_]): Boolean
    Definition Classes
    TreeNode
  49. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  50. def find(f: (SparkPlan) => Boolean): Option[SparkPlan]
    Definition Classes
    TreeNode
  51. def flatMap[A](f: (SparkPlan) => TraversableOnce[A]): Seq[A]
    Definition Classes
    TreeNode
  52. def foreach(f: (SparkPlan) => Unit): Unit
    Definition Classes
    TreeNode
  53. def foreachUp(f: (SparkPlan) => Unit): Unit
    Definition Classes
    TreeNode
  54. def formattedNodeName: String
    Attributes
    protected
    Definition Classes
    QueryPlan
  55. def generateTreeString(depth: Int, lastChildren: ArrayList[Boolean], append: (String) => Unit, verbose: Boolean, prefix: String, addSuffix: Boolean, maxFields: Int, printNodeId: Boolean, indent: Int): Unit
    Definition Classes
    TreeNode
  56. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  57. def getDefaultTreePatternBits: BitSet
    Attributes
    protected
    Definition Classes
    TreeNode
  58. def getProgress(): StateOperatorProgress

    Get the progress made by this stateful operator after execution.

    Get the progress made by this stateful operator after execution. This should be called in the driver after this SparkPlan has been executed and metrics have been updated.

    Definition Classes
    StateStoreWriter
  59. def getStateInfo: StatefulOperatorStateInfo
    Attributes
    protected
    Definition Classes
    StatefulOperator
  60. def getTagValue[T](tag: TreeNodeTag[T]): Option[T]
    Definition Classes
    TreeNode
  61. def hashCode(): Int
    Definition Classes
    TreeNode → AnyRef → Any
  62. val id: Int
    Definition Classes
    SparkPlan
  63. def initializeLogIfNecessary(isInterpreter: Boolean, silent: Boolean): Boolean
    Attributes
    protected
    Definition Classes
    Logging
  64. def initializeLogIfNecessary(isInterpreter: Boolean): Unit
    Attributes
    protected
    Definition Classes
    Logging
  65. def innerChildren: Seq[QueryPlan[_]]
    Definition Classes
    QueryPlan → TreeNode
  66. def inputSet: AttributeSet
    Definition Classes
    QueryPlan
  67. def isCanonicalizedPlan: Boolean
    Attributes
    protected
    Definition Classes
    QueryPlan
  68. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  69. def isRuleIneffective(ruleId: RuleId): Boolean
    Attributes
    protected
    Definition Classes
    TreeNode
  70. def isTraceEnabled(): Boolean
    Attributes
    protected
    Definition Classes
    Logging
  71. val joinType: JoinType
  72. def jsonFields: List[JField]
    Attributes
    protected
    Definition Classes
    TreeNode
  73. val left: SparkPlan
    Definition Classes
    StreamingSymmetricHashJoinExec → BinaryLike
  74. val leftKeys: Seq[Expression]
  75. final def legacyWithNewChildren(newChildren: Seq[SparkPlan]): SparkPlan
    Attributes
    protected
    Definition Classes
    TreeNode
  76. def log: Logger
    Attributes
    protected
    Definition Classes
    Logging
  77. def logDebug(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  78. def logDebug(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  79. def logError(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  80. def logError(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  81. def logInfo(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  82. def logInfo(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  83. def logName: String
    Attributes
    protected
    Definition Classes
    Logging
  84. def logTrace(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  85. def logTrace(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  86. def logWarning(msg: => String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  87. def logWarning(msg: => String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  88. def logicalLink: Option[LogicalPlan]

    returns

    The logical plan this plan is linked to.

    Definition Classes
    SparkPlan
  89. def longMetric(name: String): SQLMetric

    returns

    SQLMetric for the name.

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

    Overridden make copy also propagates sqlContext to copied plan.

    Overridden make copy also propagates sqlContext to copied plan.

    Definition Classes
    SparkPlan → TreeNode
  91. def map[A](f: (SparkPlan) => A): Seq[A]
    Definition Classes
    TreeNode
  92. final def mapChildren(f: (SparkPlan) => SparkPlan): SparkPlan
    Definition Classes
    BinaryLike
  93. def mapExpressions(f: (Expression) => Expression): StreamingSymmetricHashJoinExec.this.type
    Definition Classes
    QueryPlan
  94. def mapProductIterator[B](f: (Any) => B)(implicit arg0: ClassTag[B]): Array[B]
    Attributes
    protected
    Definition Classes
    TreeNode
  95. def markRuleAsIneffective(ruleId: RuleId): Unit
    Attributes
    protected
    Definition Classes
    TreeNode
  96. lazy val metrics: Map[String, SQLMetric]

    returns

    All metrics containing metrics of this SparkPlan.

    Definition Classes
    StateStoreWriter → PythonSQLMetrics → SparkPlan
  97. final def missingInput: AttributeSet
    Definition Classes
    QueryPlan
  98. def multiTransformDown(rule: PartialFunction[SparkPlan, Seq[SparkPlan]]): Stream[SparkPlan]
    Definition Classes
    TreeNode
  99. def multiTransformDownWithPruning(cond: (TreePatternBits) => Boolean, ruleId: RuleId)(rule: PartialFunction[SparkPlan, Seq[SparkPlan]]): Stream[SparkPlan]
    Definition Classes
    TreeNode
  100. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  101. def nodeName: String
    Definition Classes
    TreeNode
  102. val nodePatterns: Seq[TreePattern]
    Attributes
    protected
    Definition Classes
    TreeNode
  103. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  104. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  105. val nullLeft: GenericInternalRow
  106. val nullRight: GenericInternalRow
  107. def numberedTreeString: String
    Definition Classes
    TreeNode
  108. val origin: Origin
    Definition Classes
    TreeNode → WithOrigin
  109. def otherCopyArgs: Seq[AnyRef]
    Attributes
    protected
    Definition Classes
    TreeNode
  110. def output: Seq[Attribute]
    Definition Classes
    StreamingSymmetricHashJoinExec → QueryPlan
  111. def outputOrdering: Seq[SortOrder]
    Definition Classes
    QueryPlan
  112. def outputPartitioning: Partitioning

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

    Specifies how data is partitioned across different nodes in the cluster. Note this method may fail if it is invoked before EnsureRequirements is applied since PartitioningCollection requires all its partitionings to have the same number of partitions.

    Definition Classes
    StreamingSymmetricHashJoinExec → SparkPlan
  113. lazy val outputSet: AttributeSet
    Definition Classes
    QueryPlan
    Annotations
    @transient()
  114. def p(number: Int): SparkPlan
    Definition Classes
    TreeNode
  115. final def prepare(): Unit

    Prepares this SparkPlan for execution.

    Prepares this SparkPlan for execution. It's idempotent.

    Definition Classes
    SparkPlan
  116. def prepareSubqueries(): Unit

    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
  117. def prettyJson: String
    Definition Classes
    TreeNode
  118. def printSchema(): Unit
    Definition Classes
    QueryPlan
  119. def produceOutputWatermark(inputWatermarkMs: Long): Option[Long]

    Produce the output watermark for given input watermark (ms).

    Produce the output watermark for given input watermark (ms).

    In most cases, this is same as the criteria of state eviction, as most stateful operators produce the output from two different kinds:

    1. without buffering 2. with buffering (state)

    The state eviction happens when event time exceeds a "certain threshold of timestamp", which denotes a lower bound of event time values for output (output watermark).

    The default implementation provides the input watermark as it is. Most built-in operators will evict based on min input watermark and ensure it will be minimum of the event time value for the output so far (including output from eviction). Operators which behave differently (e.g. different criteria on eviction) must override this method.

    Note that the default behavior wil advance the watermark aggressively to simplify the logic, but it does not break the semantic of output watermark, which is following:

    An operator guarantees that it will not emit record with an event timestamp lower than its output watermark.

    For example, for 5 minutes time window aggregation, the advancement of watermark can happen "before" the window has been evicted and produced as output. Say, suppose there's an window in state: [0, 5) and input watermark = 3. Although there is no output for this operator, this operator will produce an output watermark as 3. It's still respecting the guarantee, as the operator will produce the window [0, 5) only when the output watermark is equal or greater than 5, and the downstream operator will process the input data, "and then" advance the watermark. Hence this window is considered as "non-late" record.

    Definition Classes
    StreamingSymmetricHashJoinExec → StateStoreWriter
  120. def producedAttributes: AttributeSet
    Definition Classes
    QueryPlan
  121. def productElementNames: Iterator[String]
    Definition Classes
    Product
  122. val pythonMetrics: Map[String, SQLMetric]
    Definition Classes
    PythonSQLMetrics
  123. lazy val references: AttributeSet
    Definition Classes
    QueryPlan
    Annotations
    @transient()
  124. def requiredChildDistribution: Seq[Distribution]

    Specifies the data distribution requirements of all the children for this operator.

    Specifies the data distribution requirements of all the children for this operator. By default it's UnspecifiedDistribution for each child, which means each child can have any distribution.

    If an operator overwrites this method, and specifies distribution requirements(excluding UnspecifiedDistribution and BroadcastDistribution) for more than one child, Spark guarantees that the outputs of these children will have same number of partitions, so that the operator can safely zip partitions of these children's result RDDs. Some operators can leverage this guarantee to satisfy some interesting requirement, e.g., non-broadcast joins can specify HashClusteredDistribution(a,b) for its left child, and specify HashClusteredDistribution(c,d) for its right child, then it's guaranteed that left and right child are co-partitioned by a,b/c,d, which means tuples of same value are in the partitions of same index, e.g., (a=1,b=2) and (c=1,d=2) are both in the second partition of left and right child.

    Definition Classes
    StreamingSymmetricHashJoinExec → SparkPlan
  125. def requiredChildOrdering: Seq[Seq[SortOrder]]

    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
  126. def resetMetrics(): Unit

    Resets all the metrics.

    Resets all the metrics.

    Definition Classes
    SparkPlan
  127. def rewriteAttrs(attrMap: AttributeMap[Attribute]): SparkPlan
    Definition Classes
    QueryPlan
  128. val right: SparkPlan
    Definition Classes
    StreamingSymmetricHashJoinExec → BinaryLike
  129. val rightKeys: Seq[Expression]
  130. final def sameResult(other: SparkPlan): Boolean
    Definition Classes
    QueryPlan
  131. lazy val schema: StructType
    Definition Classes
    QueryPlan
  132. def schemaString: String
    Definition Classes
    QueryPlan
  133. final def semanticHash(): Int
    Definition Classes
    QueryPlan
  134. final val session: SparkSession
    Definition Classes
    SparkPlan
  135. def setLogicalLink(logicalPlan: LogicalPlan): Unit

    Set logical plan link recursively if unset.

    Set logical plan link recursively if unset.

    Definition Classes
    SparkPlan
  136. def setOperatorMetrics(numStateStoreInstances: Int = 1): Unit

    Set the operator level metrics

    Set the operator level metrics

    Attributes
    protected
    Definition Classes
    StateStoreWriter
  137. def setStoreMetrics(store: StateStore): Unit

    Set the SQL metrics related to the state store.

    Set the SQL metrics related to the state store. This should be called in that task after the store has been updated.

    Attributes
    protected
    Definition Classes
    StateStoreWriter
  138. def setTagValue[T](tag: TreeNodeTag[T], value: T): Unit
    Definition Classes
    TreeNode
  139. def shortName: String

    Name to output in StreamingOperatorProgress to identify operator type

    Name to output in StreamingOperatorProgress to identify operator type

    Definition Classes
    StreamingSymmetricHashJoinExec → StateStoreWriter
  140. def shouldRunAnotherBatch(newInputWatermark: Long): Boolean

    Should the MicroBatchExecution run another batch based on this stateful operator and the new input watermark.

    Should the MicroBatchExecution run another batch based on this stateful operator and the new input watermark.

    Definition Classes
    StreamingSymmetricHashJoinExec → StateStoreWriter
  141. def simpleString(maxFields: Int): String
    Definition Classes
    QueryPlan → TreeNode
  142. def simpleStringWithNodeId(): String
    Definition Classes
    QueryPlan → TreeNode
  143. def sparkContext: SparkContext
    Attributes
    protected
    Definition Classes
    SparkPlan
  144. val stateFormatVersion: Int
  145. val stateInfo: Option[StatefulOperatorStateInfo]
    Definition Classes
    StreamingSymmetricHashJoinExec → StatefulOperator
  146. def statePrefix: String
    Attributes
    protected
    Definition Classes
    QueryPlan
  147. val stateWatermarkPredicates: JoinStateWatermarkPredicates
  148. def stringArgs: Iterator[Any]
    Attributes
    protected
    Definition Classes
    TreeNode
  149. lazy val subqueries: Seq[SparkPlan]
    Definition Classes
    QueryPlan
    Annotations
    @transient()
  150. def subqueriesAll: Seq[SparkPlan]
    Definition Classes
    QueryPlan
  151. def supportsColumnar: Boolean

    Return true if this stage of the plan supports columnar execution.

    Return true if this stage of the plan supports columnar execution. A plan can also support row-based execution (see supportsRowBased). Spark will decide which execution to be called during query planning.

    Definition Classes
    SparkPlan
  152. def supportsRowBased: Boolean

    Return true if this stage of the plan supports row-based execution.

    Return true if this stage of the plan supports row-based execution. A plan can also support columnar execution (see supportsColumnar). Spark will decide which execution to be called during query planning.

    Definition Classes
    SparkPlan
  153. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  154. def timeTakenMs(body: => Unit): Long

    Records the duration of running body for the next query progress update.

    Records the duration of running body for the next query progress update.

    Attributes
    protected
    Definition Classes
    StateStoreWriter
  155. def toJSON: String
    Definition Classes
    TreeNode
  156. def toRowBased: SparkPlan

    Converts the output of this plan to row-based if it is columnar plan.

    Converts the output of this plan to row-based if it is columnar plan.

    Definition Classes
    SparkPlan
  157. def toString(): String
    Definition Classes
    TreeNode → AnyRef → Any
  158. def transform(rule: PartialFunction[SparkPlan, SparkPlan]): SparkPlan
    Definition Classes
    TreeNode
  159. def transformAllExpressions(rule: PartialFunction[Expression, Expression]): StreamingSymmetricHashJoinExec.this.type
    Definition Classes
    QueryPlan
  160. def transformAllExpressionsWithPruning(cond: (TreePatternBits) => Boolean, ruleId: RuleId)(rule: PartialFunction[Expression, Expression]): StreamingSymmetricHashJoinExec.this.type
    Definition Classes
    QueryPlan
  161. def transformAllExpressionsWithSubqueries(rule: PartialFunction[Expression, Expression]): StreamingSymmetricHashJoinExec.this.type
    Definition Classes
    QueryPlan
  162. def transformDown(rule: PartialFunction[SparkPlan, SparkPlan]): SparkPlan
    Definition Classes
    TreeNode
  163. def transformDownWithPruning(cond: (TreePatternBits) => Boolean, ruleId: RuleId)(rule: PartialFunction[SparkPlan, SparkPlan]): SparkPlan
    Definition Classes
    TreeNode
  164. def transformDownWithSubqueries(f: PartialFunction[SparkPlan, SparkPlan]): SparkPlan
    Definition Classes
    QueryPlan
  165. def transformDownWithSubqueriesAndPruning(cond: (TreePatternBits) => Boolean, ruleId: RuleId)(f: PartialFunction[SparkPlan, SparkPlan]): SparkPlan
    Definition Classes
    QueryPlan
  166. def transformExpressions(rule: PartialFunction[Expression, Expression]): StreamingSymmetricHashJoinExec.this.type
    Definition Classes
    QueryPlan
  167. def transformExpressionsDown(rule: PartialFunction[Expression, Expression]): StreamingSymmetricHashJoinExec.this.type
    Definition Classes
    QueryPlan
  168. def transformExpressionsDownWithPruning(cond: (TreePatternBits) => Boolean, ruleId: RuleId)(rule: PartialFunction[Expression, Expression]): StreamingSymmetricHashJoinExec.this.type
    Definition Classes
    QueryPlan
  169. def transformExpressionsUp(rule: PartialFunction[Expression, Expression]): StreamingSymmetricHashJoinExec.this.type
    Definition Classes
    QueryPlan
  170. def transformExpressionsUpWithPruning(cond: (TreePatternBits) => Boolean, ruleId: RuleId)(rule: PartialFunction[Expression, Expression]): StreamingSymmetricHashJoinExec.this.type
    Definition Classes
    QueryPlan
  171. def transformExpressionsWithPruning(cond: (TreePatternBits) => Boolean, ruleId: RuleId)(rule: PartialFunction[Expression, Expression]): StreamingSymmetricHashJoinExec.this.type
    Definition Classes
    QueryPlan
  172. def transformUp(rule: PartialFunction[SparkPlan, SparkPlan]): SparkPlan
    Definition Classes
    TreeNode
  173. def transformUpWithBeforeAndAfterRuleOnChildren(cond: (SparkPlan) => Boolean, ruleId: RuleId)(rule: PartialFunction[(SparkPlan, SparkPlan), SparkPlan]): SparkPlan
    Definition Classes
    TreeNode
  174. def transformUpWithNewOutput(rule: PartialFunction[SparkPlan, (SparkPlan, Seq[(Attribute, Attribute)])], skipCond: (SparkPlan) => Boolean, canGetOutput: (SparkPlan) => Boolean): SparkPlan
    Definition Classes
    QueryPlan
  175. def transformUpWithPruning(cond: (TreePatternBits) => Boolean, ruleId: RuleId)(rule: PartialFunction[SparkPlan, SparkPlan]): SparkPlan
    Definition Classes
    TreeNode
  176. def transformUpWithSubqueries(f: PartialFunction[SparkPlan, SparkPlan]): SparkPlan
    Definition Classes
    QueryPlan
  177. def transformWithPruning(cond: (TreePatternBits) => Boolean, ruleId: RuleId)(rule: PartialFunction[SparkPlan, SparkPlan]): SparkPlan
    Definition Classes
    TreeNode
  178. def transformWithSubqueries(f: PartialFunction[SparkPlan, SparkPlan]): SparkPlan
    Definition Classes
    QueryPlan
  179. lazy val treePatternBits: BitSet
    Definition Classes
    QueryPlan → TreeNode → TreePatternBits
  180. def treeString(append: (String) => Unit, verbose: Boolean, addSuffix: Boolean, maxFields: Int, printOperatorId: Boolean): Unit
    Definition Classes
    TreeNode
  181. final def treeString(verbose: Boolean, addSuffix: Boolean, maxFields: Int, printOperatorId: Boolean): String
    Definition Classes
    TreeNode
  182. final def treeString: String
    Definition Classes
    TreeNode
  183. def unsetTagValue[T](tag: TreeNodeTag[T]): Unit
    Definition Classes
    TreeNode
  184. def updateOuterReferencesInSubquery(plan: SparkPlan, attrMap: AttributeMap[Attribute]): SparkPlan
    Attributes
    protected
    Definition Classes
    QueryPlan
  185. def vectorTypes: Option[Seq[String]]

    The exact java types of the columns that are output in columnar processing mode.

    The exact java types of the columns that are output in columnar processing mode. This is a performance optimization for code generation and is optional.

    Definition Classes
    SparkPlan
  186. def verboseString(maxFields: Int): String
    Definition Classes
    QueryPlan → TreeNode
  187. def verboseStringWithOperatorId(): String
    Definition Classes
    BinaryExecNode → QueryPlan
  188. def verboseStringWithSuffix(maxFields: Int): String
    Definition Classes
    TreeNode
  189. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  190. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  191. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()
  192. def waitForSubqueries(): Unit

    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
  193. final def withNewChildren(newChildren: Seq[SparkPlan]): SparkPlan
    Definition Classes
    TreeNode
  194. def withNewChildrenInternal(newLeft: SparkPlan, newRight: SparkPlan): StreamingSymmetricHashJoinExec
    Attributes
    protected
    Definition Classes
    StreamingSymmetricHashJoinExec → BinaryLike
  195. final def withNewChildrenInternal(newChildren: IndexedSeq[SparkPlan]): SparkPlan
    Definition Classes
    BinaryLike

Inherited from StateStoreWriter

Inherited from PythonSQLMetrics

Inherited from StatefulOperator

Inherited from BinaryExecNode

Inherited from BinaryLike[SparkPlan]

Inherited from SparkPlan

Inherited from Serializable

Inherited from Logging

Inherited from QueryPlan[SparkPlan]

Inherited from SQLConfHelper

Inherited from TreeNode[SparkPlan]

Inherited from WithOrigin

Inherited from TreePatternBits

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any

Ungrouped