org.apache.iotdb.db.query.dataset

类 UDTFDataSet

java.lang.Object

org.apache.iotdb.tsfile.read.query.dataset.QueryDataSet

org.apache.iotdb.db.query.dataset.UDTFDataSet

直接已知子类:

UDTFAlignByTimeDataSet, UDTFNonAlignDataSet

public abstract class UDTFDataSet
extends QueryDataSet

嵌套类概要

从类继承的嵌套类/接口 org.apache.iotdb.tsfile.read.query.dataset.QueryDataSet

QueryDataSet.EndPoint

字段概要

字段

限定符和类型	字段和说明
protected long	queryId
protected RawQueryInputLayer	rawQueryInputLayer
protected LayerPointReader[]	transformers
protected static float	UDF_COLLECTOR_MEMORY_BUDGET_IN_MB
protected static float	UDF_READER_MEMORY_BUDGET_IN_MB
protected static float	UDF_TRANSFORMER_MEMORY_BUDGET_IN_MB
protected UDTFPlan	udtfPlan

从类继承的字段 org.apache.iotdb.tsfile.read.query.dataset.QueryDataSet

alreadyReturnedRowNum, ascending, columnNum, dataTypes, endPoint, fetchSize, paths, rowLimit, rowOffset, withoutAllNull, withoutAnyNull, withoutNullColumnsIndex

构造器概要

构造器

限定符	构造器和说明
protected	UDTFDataSet(QueryContext queryContext, UDTFPlan udtfPlan, IUDFInputDataSet dataSet)
protected	UDTFDataSet(QueryContext queryContext, UDTFPlan udtfPlan, List<PartialPath> deduplicatedPaths, List<TSDataType> deduplicatedDataTypes, List<ManagedSeriesReader> readersOfSelectedSeries) execute without value filters
protected	UDTFDataSet(QueryContext queryContext, UDTFPlan udtfPlan, List<PartialPath> deduplicatedPaths, List<TSDataType> deduplicatedDataTypes, TimeGenerator timestampGenerator, List<IReaderByTimestamp> readersOfSelectedSeries, List<List<Integer>> readerToIndexList, List<Boolean> cached) execute with value filters

方法概要

限定符和类型	方法和说明
void	finalizeUDFs(long queryId)
protected void	initTransformers()

从类继承的方法 org.apache.iotdb.tsfile.read.query.dataset.QueryDataSet

decreaseAlreadyReturnedRowNum, getColumnNum, getDataTypes, getEndPoint, getPaths, getRowLimit, getRowOffset, getWithoutNullColumnsIndex, hasLimit, hasNext, hasNextWithoutConstraint, initQueryDataSetFields, isWithoutAllNull, isWithoutAnyNull, next, nextWithoutConstraint, setColumnNum, setDataTypes, setEndPoint, setFetchSize, setRowLimit, setRowOffset, setWithoutAllNull, setWithoutAnyNull, setWithoutNullColumnsIndex, withoutNullFilter

从类继承的方法 java.lang.Object

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

字段详细资料

UDF_READER_MEMORY_BUDGET_IN_MB

protected static final float UDF_READER_MEMORY_BUDGET_IN_MB

UDF_TRANSFORMER_MEMORY_BUDGET_IN_MB

protected static final float UDF_TRANSFORMER_MEMORY_BUDGET_IN_MB

UDF_COLLECTOR_MEMORY_BUDGET_IN_MB

protected static final float UDF_COLLECTOR_MEMORY_BUDGET_IN_MB

queryId

protected final long queryId

udtfPlan

protected final UDTFPlan udtfPlan

rawQueryInputLayer

protected final RawQueryInputLayer rawQueryInputLayer

transformers

protected LayerPointReader[] transformers

构造器详细资料

UDTFDataSet

protected UDTFDataSet(QueryContext queryContext,
                      UDTFPlan udtfPlan,
                      List<PartialPath> deduplicatedPaths,
                      List<TSDataType> deduplicatedDataTypes,
                      TimeGenerator timestampGenerator,
                      List<IReaderByTimestamp> readersOfSelectedSeries,
                      List<List<Integer>> readerToIndexList,
                      List<Boolean> cached)
               throws QueryProcessException,
                      IOException

execute with value filters

抛出:

QueryProcessException

IOException

UDTFDataSet

protected UDTFDataSet(QueryContext queryContext,
                      UDTFPlan udtfPlan,
                      List<PartialPath> deduplicatedPaths,
                      List<TSDataType> deduplicatedDataTypes,
                      List<ManagedSeriesReader> readersOfSelectedSeries)
               throws QueryProcessException,
                      IOException,
                      InterruptedException

execute without value filters

抛出:

QueryProcessException

IOException

InterruptedException

UDTFDataSet

protected UDTFDataSet(QueryContext queryContext,
                      UDTFPlan udtfPlan,
                      IUDFInputDataSet dataSet)
               throws QueryProcessException,
                      IOException

抛出:

QueryProcessException

IOException

方法详细资料

initTransformers

protected void initTransformers()
                         throws QueryProcessException,
                                IOException

抛出:

QueryProcessException

IOException

finalizeUDFs

public void finalizeUDFs(long queryId)