Package org.apache.iotdb.db.query.executor

Class LastQueryExecutor

java.lang.Object

org.apache.iotdb.db.query.executor.LastQueryExecutor

public class LastQueryExecutor
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field	Description
protected org.apache.iotdb.tsfile.read.expression.IExpression	expression

Constructor Summary

Constructors

Constructor	Description
LastQueryExecutor(java.util.List<org.apache.iotdb.commons.path.PartialPath> selectedSeries, java.util.List<org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> dataTypes)
LastQueryExecutor(LastQueryPlan lastQueryPlan)

Method Summary

Modifier and Type	Method	Description
protected java.util.List<org.apache.iotdb.tsfile.read.TimeValuePair>	calculateLastPairForSeries(java.util.List<org.apache.iotdb.commons.path.PartialPath> seriesPaths, java.util.List<org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> dataTypes, QueryContext context, org.apache.iotdb.tsfile.read.expression.IExpression expression, RawDataQueryPlan lastQueryPlan)
static java.util.List<org.apache.iotdb.tsfile.read.TimeValuePair>	calculateLastPairForSeriesLocally(java.util.List<org.apache.iotdb.commons.path.PartialPath> seriesPaths, java.util.List<org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> dataTypes, QueryContext context, org.apache.iotdb.tsfile.read.expression.IExpression expression, java.util.Map<java.lang.String,java.util.Set<java.lang.String>> deviceMeasurementsMap)
static void	clear()
org.apache.iotdb.tsfile.read.query.dataset.QueryDataSet	execute(QueryContext context, LastQueryPlan lastQueryPlan)	execute last function

Methods inherited from class java.lang.Object

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

Field Detail

expression

protected org.apache.iotdb.tsfile.read.expression.IExpression expression

Constructor Detail

LastQueryExecutor

public LastQueryExecutor(LastQueryPlan lastQueryPlan)

LastQueryExecutor

public LastQueryExecutor(java.util.List<org.apache.iotdb.commons.path.PartialPath> selectedSeries,
                         java.util.List<org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> dataTypes)

Method Detail

execute

public org.apache.iotdb.tsfile.read.query.dataset.QueryDataSet execute(QueryContext context,
                                                                       LastQueryPlan lastQueryPlan)
                                                                throws StorageEngineException,
                                                                       java.io.IOException,
                                                                       QueryProcessException

execute last function

Parameters:

context - query context

Throws:

StorageEngineException

java.io.IOException

QueryProcessException

calculateLastPairForSeries

protected java.util.List<org.apache.iotdb.tsfile.read.TimeValuePair> calculateLastPairForSeries(java.util.List<org.apache.iotdb.commons.path.PartialPath> seriesPaths,
                                                                                                java.util.List<org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> dataTypes,
                                                                                                QueryContext context,
                                                                                                org.apache.iotdb.tsfile.read.expression.IExpression expression,
                                                                                                RawDataQueryPlan lastQueryPlan)
                                                                                         throws QueryProcessException,
                                                                                                StorageEngineException,
                                                                                                java.io.IOException

Throws:

QueryProcessException

StorageEngineException

java.io.IOException

calculateLastPairForSeriesLocally

public static java.util.List<org.apache.iotdb.tsfile.read.TimeValuePair> calculateLastPairForSeriesLocally(java.util.List<org.apache.iotdb.commons.path.PartialPath> seriesPaths,
                                                                                                           java.util.List<org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> dataTypes,
                                                                                                           QueryContext context,
                                                                                                           org.apache.iotdb.tsfile.read.expression.IExpression expression,
                                                                                                           java.util.Map<java.lang.String,java.util.Set<java.lang.String>> deviceMeasurementsMap)
                                                                                                    throws QueryProcessException,
                                                                                                           StorageEngineException,
                                                                                                           java.io.IOException

Throws:

QueryProcessException

StorageEngineException

java.io.IOException

clear

public static void clear()