casacore
Public Member Functions | List of all members
casacore::TableExprGroupNull Class Reference

Class derived from TableExprGroupFuncBase representing a no function. More...

#include <ExprGroup.h>

Public Member Functions

 TableExprGroupNull (TableExprNodeRep *node)
 
virtual ~TableExprGroupNull ()
 
virtual Bool isLazy () const
 Does the aggregate function use lazy semantics? The default implementation returns False. More...
 
virtual void apply (const TableExprId &id)
 Get the operand's value for the given row and apply it to the aggregation. More...
 
- Public Member Functions inherited from casacore::TableExprGroupFuncBase
 TableExprGroupFuncBase (TableExprNodeRep *node)
 Construct from the TaQL aggregation node. More...
 
virtual ~TableExprGroupFuncBase ()
 
uInt seqnr () const
 Get the function's sequence nr. More...
 
void setSeqnr (uInt seqnr)
 Set the function's sequence nr. More...
 
virtual void finish ()
 If needed, finish the aggregation. More...
 
virtual CountedPtr< vector< TableExprId > > getIds () const
 Get the assembled TableExprIds of a group. More...
 
virtual Bool getBool (const vector< TableExprId > &=vector< TableExprId >())
 Get the aggregated value. More...
 
virtual Int64 getInt (const vector< TableExprId > &=vector< TableExprId >())
 
virtual Double getDouble (const vector< TableExprId > &=vector< TableExprId >())
 
virtual DComplex getDComplex (const vector< TableExprId > &=vector< TableExprId >())
 
virtual MVTime getDate (const vector< TableExprId > &=vector< TableExprId >())
 
virtual String getString (const vector< TableExprId > &=vector< TableExprId >())
 
virtual MArray< BoolgetArrayBool (const vector< TableExprId > &=vector< TableExprId >())
 
virtual MArray< Int64getArrayInt (const vector< TableExprId > &=vector< TableExprId >())
 
virtual MArray< DoublegetArrayDouble (const vector< TableExprId > &=vector< TableExprId >())
 
virtual MArray< DComplex > getArrayDComplex (const vector< TableExprId > &=vector< TableExprId >())
 
virtual MArray< MVTimegetArrayDate (const vector< TableExprId > &=vector< TableExprId >())
 
virtual MArray< StringgetArrayString (const vector< TableExprId > &=vector< TableExprId >())
 

Additional Inherited Members

- Protected Attributes inherited from casacore::TableExprGroupFuncBase
TableExprNodeRepitsNode
 
TableExprNodeRepitsOperand
 
uInt itsSeqnr
 

Detailed Description

Class derived from TableExprGroupFuncBase representing a no function.

Intended use:

Internal

Review Status

Test programs:
tExprGroup

Synopsis

This class represents a null aggregate function which is meant for possible aggregate functionality in UDFs.

Definition at line 266 of file ExprGroup.h.

Constructor & Destructor Documentation

◆ TableExprGroupNull()

casacore::TableExprGroupNull::TableExprGroupNull ( TableExprNodeRep node)
explicit

◆ ~TableExprGroupNull()

virtual casacore::TableExprGroupNull::~TableExprGroupNull ( )
virtual

Member Function Documentation

◆ apply()

virtual void casacore::TableExprGroupNull::apply ( const TableExprId id)
virtual

Get the operand's value for the given row and apply it to the aggregation.

This function should not be called for lazy classes.

Implements casacore::TableExprGroupFuncBase.

◆ isLazy()

virtual Bool casacore::TableExprGroupNull::isLazy ( ) const
virtual

Does the aggregate function use lazy semantics? The default implementation returns False.

Reimplemented from casacore::TableExprGroupFuncBase.


The documentation for this class was generated from the following file: