Apache Derby Database Engine and Embedded JDBC Driver 10.17.1.0 · org.apache.derby.impl.sql.execute.GenericAggregator

Modifier and Type	Field and Description
private final AggregatorInfo	aggInfo
pack-priv int	aggregatorColumnId
private ExecAggregator	cachedAggregator
private final ClassFactory	cf
private int	inputColumnId
private int	resultColumnId

Access	Constructor and Description
pack-priv	GenericAggregator(AggregatorInfo information about the user aggregate aggInfo, ClassFactory the class factory. cf) Constructor:

Method Summary

Modifier and Type	Method and Description
pack-priv void	accumulate(ExecRow the row with the input colum inputRow, ExecRow the row with the aggregator accumulateRow) Accumulate the aggregate results.
pack-priv void	accumulate(Object[] the row with the input colum inputRow, Object[] the row with the aggregator accumulateRow) Accumulate the aggregate results.
pack-priv void	accumulate(DataValueDescriptor inputColumn, DataValueDescriptor aggregatorColumn) Accumulate the aggregate results.
pack-priv boolean	finish(ExecRow the row with the result and the aggregator row) Get the results of the aggregation and put it in the result column.
pack-priv AggregatorInfo	getAggregatorInfo()
pack-priv ExecAggregator	Returns: an exec aggregator getAggregatorInstance() Get a new instance of the aggregator and initialize it.
pack-priv int	getColumnId() Return the column id that is being aggregated
pack-priv DataValueDescriptor	getInputColumnValue(ExecRow row)
pack-priv void	initialize(ExecRow the row with the aggregator to be initialized row) Initialize the aggregator
pack-priv void	merge(ExecRow the row with the input colum inputRow, ExecRow the row with the aggregator mergeRow) Merge the aggregate results.
pack-priv void	merge(Object[] the row with the input colum inputRow, Object[] the row with the aggregator mergeRow) Merge the aggregate results.
pack-priv void	merge(Storable aggregatorColumnIn, Storable aggregatorColumnOut) Merge two partial aggregations.

Inherited from java.lang.Object:: clone equals finalize getClass hashCode notify notifyAll toString wait wait wait

aggInfo	back to summary
private final AggregatorInfo aggInfo

aggregatorColumnId	back to summary
pack-priv int aggregatorColumnId

cachedAggregator	back to summary
private ExecAggregator cachedAggregator

cf	back to summary
private final ClassFactory cf

inputColumnId	back to summary
private int inputColumnId

resultColumnId	back to summary
private int resultColumnId

GenericAggregator	back to summary
pack-priv GenericAggregator(AggregatorInfo aggInfo, ClassFactory cf) Constructor: Parameters aggInfo:AggregatorInfo information about the user aggregate cf:ClassFactory the class factory.

Method Detail

accumulate	back to summary
pack-priv void accumulate(ExecRow inputRow, ExecRow accumulateRow) throws StandardException Accumulate the aggregate results. This is the guts of the aggregation. We will call the user aggregate on itself to do the aggregation. Parameters inputRow:ExecRow the row with the input colum accumulateRow:ExecRow the row with the aggregator Exceptions StandardException: on error

accumulate

back to summary

pack-priv void accumulate(ExecRow inputRow, ExecRow accumulateRow) throws StandardException

Accumulate the aggregate results. This is the guts of the aggregation. We will call the user aggregate on itself to do the aggregation.

Parameters

inputRow:ExecRow: the row with the input colum
accumulateRow:ExecRow: the row with the aggregator

Exceptions

StandardException:: on error

accumulate	back to summary
pack-priv void accumulate(Object[] inputRow, Object[] accumulateRow) throws StandardException Accumulate the aggregate results. This is the guts of the aggregation. We will call the user aggregate on itself to do the aggregation. Parameters inputRow:Object[] the row with the input colum accumulateRow:Object[] the row with the aggregator Exceptions StandardException: on error

accumulate

back to summary

pack-priv void accumulate(Object[] inputRow, Object[] accumulateRow) throws StandardException

Accumulate the aggregate results. This is the guts of the aggregation. We will call the user aggregate on itself to do the aggregation.

Parameters

inputRow:Object[]: the row with the input colum
accumulateRow:Object[]: the row with the aggregator

Exceptions

StandardException:: on error

accumulate	back to summary
pack-priv void accumulate(DataValueDescriptor inputColumn, DataValueDescriptor aggregatorColumn) throws StandardException Accumulate the aggregate results. This is the guts of the aggregation. We will call the user aggregate on itself to do the aggregation. Exceptions StandardException: on error

accumulate

back to summary

pack-priv void accumulate(DataValueDescriptor inputColumn, DataValueDescriptor aggregatorColumn) throws StandardException

Accumulate the aggregate results. This is the guts of the aggregation. We will call the user aggregate on itself to do the aggregation.

Exceptions

StandardException:: on error

finish	back to summary
pack-priv boolean finish(ExecRow row) throws StandardException Get the results of the aggregation and put it in the result column. Parameters row:ExecRow the row with the result and the aggregator Exceptions StandardException: on error

finish

back to summary

pack-priv boolean finish(ExecRow row) throws StandardException

Get the results of the aggregation and put it in the result column.

Parameters

row:ExecRow: the row with the result and the aggregator

Exceptions

StandardException:: on error

getAggregatorInfo	back to summary
pack-priv AggregatorInfo getAggregatorInfo()

getAggregatorInstance	back to summary
pack-priv ExecAggregator getAggregatorInstance() throws StandardException Get a new instance of the aggregator and initialize it. Returns:ExecAggregator an exec aggregator Exceptions StandardException: on error

getAggregatorInstance

back to summary

pack-priv ExecAggregator getAggregatorInstance() throws StandardException

Get a new instance of the aggregator and initialize it.

Returns:ExecAggregator

an exec aggregator

Exceptions

StandardException:: on error

getColumnId	back to summary
pack-priv int getColumnId() Return the column id that is being aggregated

getInputColumnValue	back to summary
pack-priv DataValueDescriptor getInputColumnValue(ExecRow row) throws StandardException

initialize	back to summary
pack-priv void initialize(ExecRow row) throws StandardException Initialize the aggregator Parameters row:ExecRow the row with the aggregator to be initialized Exceptions StandardException: on error

initialize

back to summary

pack-priv void initialize(ExecRow row) throws StandardException

Initialize the aggregator

Parameters

row:ExecRow: the row with the aggregator to be initialized

Exceptions

StandardException:: on error

merge	back to summary
pack-priv void merge(ExecRow inputRow, ExecRow mergeRow) throws StandardException Merge the aggregate results. This is the guts of the aggregation. We will call the user aggregate on itself to do the aggregation. Parameters inputRow:ExecRow the row with the input colum mergeRow:ExecRow the row with the aggregator Exceptions StandardException: on error

merge

back to summary

pack-priv void merge(ExecRow inputRow, ExecRow mergeRow) throws StandardException

Merge the aggregate results. This is the guts of the aggregation. We will call the user aggregate on itself to do the aggregation.

Parameters

inputRow:ExecRow: the row with the input colum
mergeRow:ExecRow: the row with the aggregator

Exceptions

StandardException:: on error

merge	back to summary
pack-priv void merge(Object[] inputRow, Object[] mergeRow) throws StandardException Merge the aggregate results. This is the guts of the aggregation. We will call the user aggregate on itself to do the aggregation. Parameters inputRow:Object[] the row with the input colum mergeRow:Object[] the row with the aggregator Exceptions StandardException: on error

merge

back to summary

pack-priv void merge(Object[] inputRow, Object[] mergeRow) throws StandardException

Merge the aggregate results. This is the guts of the aggregation. We will call the user aggregate on itself to do the aggregation.

Parameters

inputRow:Object[]: the row with the input colum
mergeRow:Object[]: the row with the aggregator

Exceptions

StandardException:: on error

merge	back to summary
pack-priv void merge(Storable aggregatorColumnIn, Storable aggregatorColumnOut) throws StandardException Merge two partial aggregations. This is how the sorter merges partial aggregates. Exceptions StandardException: on error

merge

back to summary

pack-priv void merge(Storable aggregatorColumnIn, Storable aggregatorColumnOut) throws StandardException

Merge two partial aggregations. This is how the sorter merges partial aggregates.

Exceptions

StandardException:: on error

pack-priv Class GenericAggregator

Field Summary

Constructor Summary

Method Summary

Field Detail

Constructor Detail

Method Detail