org.apache.iotdb.db.query.expression.unary

类 FunctionExpression

java.lang.Object

org.apache.iotdb.db.query.expression.Expression

org.apache.iotdb.db.query.expression.unary.FunctionExpression

public class FunctionExpression
extends Expression

字段概要

从类继承的字段 org.apache.iotdb.db.query.expression.Expression

isConstantOperandCache

构造器概要

构造器

构造器和说明
FunctionExpression(String functionName)
FunctionExpression(String functionName, Map<String,String> functionAttributes, List<Expression> expressions)

方法概要

限定符和类型	方法和说明
void	addAttribute(String key, String value)
void	addExpression(Expression expression)
void	collectPaths(Set<PartialPath> pathSet)
void	concat(List<PartialPath> prefixPaths, List<Expression> resultExpressions)
IntermediateLayer	constructIntermediateLayer(long queryId, UDTFPlan udtfPlan, RawQueryInputLayer rawTimeSeriesInputLayer, Map<Expression,IntermediateLayer> expressionIntermediateLayerMap, Map<Expression,TSDataType> expressionDataTypeMap, LayerMemoryAssigner memoryAssigner)
void	constructUdfExecutors(Map<String,UDTFExecutor> expressionName2Executor, ZoneId zoneId)
List<Expression>	getExpressions() returns the DIRECT children expressions if it has any, otherwise an EMPTY list will be returned
String	getExpressionStringInternal() Sub-classes should override this method to provide valid string representation of this object.
Map<String,String>	getFunctionAttributes()
String	getFunctionName()
List<PartialPath>	getPaths()
boolean	isConstantOperandInternal() Sub-classes should override this method indicating if the expression is a constant operand
boolean	isCountStar()
boolean	isPlainAggregationFunctionExpression()
boolean	isTimeSeriesGeneratingFunctionExpression()
boolean	isUserDefinedAggregationFunctionExpression()
void	removeWildcards(WildcardsRemover wildcardsRemover, List<Expression> resultExpressions)
void	setExpressions(List<Expression> expressions)
void	updateStatisticsForMemoryAssigner(LayerMemoryAssigner memoryAssigner)

从类继承的方法 org.apache.iotdb.db.query.expression.Expression

equals, getExpressionString, hashCode, isConstantOperand, iterator, toString

从类继承的方法 java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

构造器详细资料

FunctionExpression

public FunctionExpression(String functionName)

FunctionExpression

public FunctionExpression(String functionName,
                          Map<String,String> functionAttributes,
                          List<Expression> expressions)

方法详细资料

isPlainAggregationFunctionExpression

public boolean isPlainAggregationFunctionExpression()

覆盖:

isPlainAggregationFunctionExpression 在类中 Expression

isConstantOperandInternal

public boolean isConstantOperandInternal()

从类复制的说明: Expression

Sub-classes should override this method indicating if the expression is a constant operand

指定者:

isConstantOperandInternal 在类中 Expression

isTimeSeriesGeneratingFunctionExpression

public boolean isTimeSeriesGeneratingFunctionExpression()

覆盖:

isTimeSeriesGeneratingFunctionExpression 在类中 Expression

isUserDefinedAggregationFunctionExpression

public boolean isUserDefinedAggregationFunctionExpression()

覆盖:

isUserDefinedAggregationFunctionExpression 在类中 Expression

isCountStar

public boolean isCountStar()

addAttribute

public void addAttribute(String key,
                         String value)

addExpression

public void addExpression(Expression expression)

setExpressions

public void setExpressions(List<Expression> expressions)

getFunctionName

public String getFunctionName()

getFunctionAttributes

public Map<String,String> getFunctionAttributes()

getExpressions

public List<Expression> getExpressions()

从类复制的说明: Expression

returns the DIRECT children expressions if it has any, otherwise an EMPTY list will be returned

指定者:

getExpressions 在类中 Expression

concat

public void concat(List<PartialPath> prefixPaths,
                   List<Expression> resultExpressions)

指定者:

concat 在类中 Expression

removeWildcards

public void removeWildcards(WildcardsRemover wildcardsRemover,
                            List<Expression> resultExpressions)
                     throws LogicalOptimizeException

指定者:

removeWildcards 在类中 Expression

抛出:

LogicalOptimizeException

collectPaths

public void collectPaths(Set<PartialPath> pathSet)

指定者:

collectPaths 在类中 Expression

constructUdfExecutors

public void constructUdfExecutors(Map<String,UDTFExecutor> expressionName2Executor,
                                  ZoneId zoneId)

指定者:

constructUdfExecutors 在类中 Expression

updateStatisticsForMemoryAssigner

public void updateStatisticsForMemoryAssigner(LayerMemoryAssigner memoryAssigner)

指定者:

updateStatisticsForMemoryAssigner 在类中 Expression

constructIntermediateLayer

public IntermediateLayer constructIntermediateLayer(long queryId,
                                                    UDTFPlan udtfPlan,
                                                    RawQueryInputLayer rawTimeSeriesInputLayer,
                                                    Map<Expression,IntermediateLayer> expressionIntermediateLayerMap,
                                                    Map<Expression,TSDataType> expressionDataTypeMap,
                                                    LayerMemoryAssigner memoryAssigner)
                                             throws QueryProcessException,
                                                    IOException

指定者:

constructIntermediateLayer 在类中 Expression

抛出:

QueryProcessException

IOException

getPaths

public List<PartialPath> getPaths()

getExpressionStringInternal

public String getExpressionStringInternal()

从类复制的说明: Expression

Sub-classes should override this method to provide valid string representation of this object. See Expression.getExpressionString()

指定者:

getExpressionStringInternal 在类中 Expression