Package org.rumbledb.runtime

Class CommaExpressionIterator

java.lang.Object

org.rumbledb.runtime.RuntimeIterator

org.rumbledb.runtime.HybridRuntimeIterator

org.rumbledb.runtime.CommaExpressionIterator

All Implemented Interfaces:

com.esotericsoftware.kryo.KryoSerializable, Serializable, RuntimeIteratorInterface

public class CommaExpressionIterator
extends HybridRuntimeIterator

See Also:

• Serialized Form

Field Summary

Fields inherited from class org.rumbledb.runtime.HybridRuntimeIterator

result

Fields inherited from class org.rumbledb.runtime.RuntimeIterator

children, currentDynamicContextForLocalExecution, FLOW_EXCEPTION_MESSAGE, hasNext, isOpen, isSequential, isUpdating, staticContext, staticURI

Constructor Summary

Constructors

Constructor	Description
CommaExpressionIterator(List<RuntimeIterator> childIterators, boolean isUpdating, RuntimeStaticContext staticContext)
CommaExpressionIterator(List<RuntimeIterator> childIterators, RuntimeStaticContext staticContext)

Method Summary

Modifier and Type	Method	Description
protected void	closeLocal()
NativeClauseContext	generateNativeQuery(NativeClauseContext nativeClauseContext)	This function generate (if possible) a native spark-sql query that maps the inner working of the iterator
List<RuntimeIterator>	getChildren()
PendingUpdateList	getPendingUpdateList(DynamicContext context)
org.apache.spark.api.java.JavaRDD<Item>	getRDDAux(DynamicContext dynamicContext)
protected boolean	hasNextLocal()
Item	nextLocal()
void	openLocal()
protected void	resetLocal()
void	setNextResult()

Methods inherited from class org.rumbledb.runtime.HybridRuntimeIterator

close, collectRDDwithLimit, dataFrameToRDDOfItems, fallbackToRDDIfDFNotImplemented, getRDD, hasNext, implementsDataFrames, implementsLocal, implementsRDD, materialize, materializeAtMostOneItemOrNull, materializeExactlyOneItem, materializeFirstItemOrNull, materializeNFirstItems, next, open, reset

Methods inherited from class org.rumbledb.runtime.RuntimeIterator

bindToVariableInDynamicContext, canProduceDataFrame, deepCopy, getConfiguration, getDataFrame, getEffectiveBooleanValue, getEffectiveBooleanValueOrCheckPosition, getHighestExecutionMode, getMetadata, getOrCreateDataFrame, getStaticType, getVariableDependencies, isDataFrame, isLocal, isOpen, isRDD, isRDDOrDataFrame, isSequential, isSparkJobNeeded, isUpdating, materialize, materializeAtMostOneItemOrDefault, print, printToStandardError, read, setStaticContext, write

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

CommaExpressionIterator

public CommaExpressionIterator(List<RuntimeIterator> childIterators,
 boolean isUpdating,
 RuntimeStaticContext staticContext)

CommaExpressionIterator

public CommaExpressionIterator(List<RuntimeIterator> childIterators,
 RuntimeStaticContext staticContext)

Method Details

nextLocal

public Item nextLocal()

Specified by:

nextLocal in class HybridRuntimeIterator

openLocal

public void openLocal()

Specified by:

openLocal in class HybridRuntimeIterator

setNextResult

public void setNextResult()

hasNextLocal

protected boolean hasNextLocal()

Specified by:

hasNextLocal in class HybridRuntimeIterator

resetLocal

protected void resetLocal()

Specified by:

resetLocal in class HybridRuntimeIterator

closeLocal

protected void closeLocal()

Specified by:

closeLocal in class HybridRuntimeIterator

getRDDAux

public org.apache.spark.api.java.JavaRDD<Item> getRDDAux(DynamicContext dynamicContext)

Specified by:

getRDDAux in class HybridRuntimeIterator

generateNativeQuery

public NativeClauseContext generateNativeQuery(NativeClauseContext nativeClauseContext)

Description copied from class: RuntimeIterator

This function generate (if possible) a native spark-sql query that maps the inner working of the iterator

Overrides:

generateNativeQuery in class RuntimeIterator

Parameters:

nativeClauseContext - context information to generate the native query

Returns:

a native clause context with the spark-sql native query to get an equivalent result of the iterator, or [NativeClauseContext.NoNativeQuery] if it is not possible

getChildren

public List<RuntimeIterator> getChildren()

getPendingUpdateList

public PendingUpdateList getPendingUpdateList(DynamicContext context)

Overrides:

getPendingUpdateList in class RuntimeIterator