Top Description Fields Constructors Methods
org.apache.derby.impl.sql.execute

pack-priv Class DistinctGroupedAggregateResultSet

extends GroupedAggregateResultSet
Class Inheritance
Imports
org.apache.derby.shared.common.error.StandardException, org.apache.derby.iapi.services.loader.GeneratedMethod, org.apache.derby.iapi.sql.Activation, org.apache.derby.iapi.sql.execute.NoPutResultSet
This ResultSet evaluates grouped aggregates when there is 1 or more distinct aggregate. It will scan the entire source result set and calculate the grouped aggregates when scanning the source during the first call to next(). RESOLVE - This subclass is essentially empty. Someday we will need to write additional code for distinct grouped aggregates, especially when we support multiple distinct aggregates.

Field Summary

Inherited from org.apache.derby.impl.sql.execute.GroupedAggregateResultSet:
hasDistinctAggregateisInSortedOrderrowsInputrowsReturnedsortProperties

Constructor Summary

AccessConstructor and Description
pack-priv
DistinctGroupedAggregateResultSet(NoPutResultSet
input result set
s, boolean
true if the source results are in sorted order
isInSortedOrder, int
indicates the number of the SavedObject off of the PreparedStatement that holds the AggregatorInfoList used by this routine.
aggregateItem, int
indicates the number of the SavedObject off of the PreparedStatement that holds the ColumOrdering array used by this routine
orderingItem, Activation
activation
a, int
saved object that builds an empty output row
ra, int
approx row size, passed to sorter
maxRowSize, int
The resultSetNumber for this result set
resultSetNumber, double optimizerEstimatedRowCount, double optimizerEstimatedCost, boolean isRollup)

Constructor

Method Summary

Inherited from org.apache.derby.impl.sql.execute.GroupedAggregateResultSet:
closecloseSourcegetCurrentRowgetNextRowCoregetRowLocationgetTimeSpentopenCore

Constructor Detail

DistinctGroupedAggregateResultSetback to summary
pack-priv DistinctGroupedAggregateResultSet(NoPutResultSet s, boolean isInSortedOrder, int aggregateItem, int orderingItem, Activation a, int ra, int maxRowSize, int resultSetNumber, double optimizerEstimatedRowCount, double optimizerEstimatedCost, boolean isRollup) throws StandardException

Constructor

Parameters
s:NoPutResultSet

input result set

isInSortedOrder:boolean

true if the source results are in sorted order

aggregateItem:int

indicates the number of the SavedObject off of the PreparedStatement that holds the AggregatorInfoList used by this routine.

orderingItem:int

indicates the number of the SavedObject off of the PreparedStatement that holds the ColumOrdering array used by this routine

a:Activation

activation

ra:int

saved object that builds an empty output row

maxRowSize:int

approx row size, passed to sorter

resultSetNumber:int

The resultSetNumber for this result set

Exceptions
StandardException:
Thrown on error