org.verdictdb.core.querying.ola

Class AsyncQueryExecutionPlan

java.lang.Object

org.verdictdb.core.querying.QueryExecutionPlan

org.verdictdb.core.querying.ola.AsyncQueryExecutionPlan

All Implemented Interfaces:

Serializable, ExecutablePlan, IdCreator

public class AsyncQueryExecutionPlan
extends QueryExecutionPlan

See Also:

Serialized Form

Field Summary

Fields inherited from class org.verdictdb.core.querying.QueryExecutionPlan

idCreator, root, scrambleMeta

Method Summary

Modifier and Type	Method and Description
ExecutableNodeBase	convertToProgressiveAgg(ScrambleMetaSet scrambleMeta, AggExecutionNodeBlock aggNodeBlock) Converts the root node and its descendants into the configuration that enables progressive aggregation.
static AsyncQueryExecutionPlan	create(QueryExecutionPlan plan)
void	rewrittenProjectionNode(AggExecutionNodeBlock block, ProjectionNode node)
void	setTierColumnAlias(AsyncAggExecutionNode node)

Methods inherited from class org.verdictdb.core.querying.QueryExecutionPlan

cleanUp, deepcopy, generateAliasName, generateTempTableName, getAllNodes, getNodeGroupIDs, getNodesInGroup, getReportingNode, getRoot, getRootNode, getScrambleMeta, getScratchpadSchemaName, getSerialNumber, setRootNode, setScrambleMeta, toString

Methods inherited from class java.lang.Object

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

Method Detail

create

public static AsyncQueryExecutionPlan create(QueryExecutionPlan plan)
                                      throws VerdictDBException

Throws:

VerdictDBException

convertToProgressiveAgg

public ExecutableNodeBase convertToProgressiveAgg(ScrambleMetaSet scrambleMeta,
                                                  AggExecutionNodeBlock aggNodeBlock)
                                           throws VerdictDBValueException

Converts the root node and its descendants into the configuration that enables progressive aggregation.

Basically aggregate subqueries are blocking operations while others operations are divided into smaller- scale operations (which involve different portions of data).

Parameters:

nodeBlock -

Returns:

Returns the root of the multiple aggregation nodes (each of which involves different combinations of partitions)

Throws:

VerdictDBValueException

rewrittenProjectionNode

public void rewrittenProjectionNode(AggExecutionNodeBlock block,
                                    ProjectionNode node)

setTierColumnAlias

public void setTierColumnAlias(AsyncAggExecutionNode node)