Package org.rumbledb.runtime.navigation

Class SequenceLookupIterator

java.lang.Object

org.rumbledb.runtime.plan.RuntimePlan<Item>

org.rumbledb.runtime.plan.ItemRuntimePlan

org.rumbledb.runtime.AbstractAtMostOneItemRuntimePlan

org.rumbledb.runtime.navigation.SequenceLookupIterator

All Implemented Interfaces:

Serializable, AtMostOneLocalRuntimePlan<Item>, LocalRuntimePlan<Item>, NativeQueryRuntimePlan

public class SequenceLookupIterator
extends AbstractAtMostOneItemRuntimePlan
implements NativeQueryRuntimePlan

See Also:

• Serialized Form

Field Summary

Fields inherited from class org.rumbledb.runtime.plan.RuntimePlan

staticContext

Constructor Summary

Constructors

Constructor	Description
SequenceLookupIterator(ItemRuntimePlan sequence, int position, RuntimeStaticContext staticContext)

Method Summary

Modifier and Type	Method	Description
Item	evaluateAtMostOne(DynamicContext dynamicContext)	Evaluates the plan without allocating a cursor.
NativeClauseContext	generateNativeQuery(NativeClauseContext nativeClauseContext)
Item	lookupDF(DynamicContext dynamicContext)
Item	lookupRDD(DynamicContext dynamicContext)
Item	lookupSmallPosition(DynamicContext dynamicContext)

Methods inherited from class org.rumbledb.runtime.AbstractAtMostOneItemRuntimePlan

createNativeCursor

Methods inherited from class org.rumbledb.runtime.plan.ItemRuntimePlan

getChild, getChildren, getStaticType, getVariableDependencies, isSparkJobNeeded, print

Methods inherited from class org.rumbledb.runtime.plan.RuntimePlan

getConfiguration, getCursor, getDataFrame, getMetadata, getRDD, getRuntimeStaticContext, materialize, materializeAtMost, materializeAtMostOne, materializeExactlyOne, materializeFirstOrNull

Methods inherited from class java.lang.Object

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

Constructor Details

SequenceLookupIterator

public SequenceLookupIterator(ItemRuntimePlan sequence,
 int position,
 RuntimeStaticContext staticContext)

Method Details

evaluateAtMostOne

public Item evaluateAtMostOne(DynamicContext dynamicContext)

Description copied from interface: AtMostOneLocalRuntimePlan

Evaluates the plan without allocating a cursor.

Specified by:

evaluateAtMostOne in interface AtMostOneLocalRuntimePlan<Item>

Specified by:

evaluateAtMostOne in class AbstractAtMostOneItemRuntimePlan

Parameters:

dynamicContext - the dynamic context for the evaluation

Returns:

the value, or null for the empty sequence

lookupSmallPosition

public Item lookupSmallPosition(DynamicContext dynamicContext)

lookupDF

public Item lookupDF(DynamicContext dynamicContext)

lookupRDD

public Item lookupRDD(DynamicContext dynamicContext)

generateNativeQuery

public NativeClauseContext generateNativeQuery(NativeClauseContext nativeClauseContext)

Specified by:

generateNativeQuery in interface NativeQueryRuntimePlan