casa::TableExprUDFNode Class Reference

Class representing a function in table select expression. More...

#include <ExprUDFNode.h>

Inheritance diagram for casa::TableExprUDFNode:

List of all members.

Public Member Functions
	TableExprUDFNode (UDFBase *udf, const Table &, const TableExprNodeSet &source)
	Constructor.
virtual	~TableExprUDFNode ()
	Destructor.
virtual Bool	getBool (const TableExprId &id)
	Functions to get the desired result of a function.
virtual Int64	getInt (const TableExprId &id)
virtual Double	getDouble (const TableExprId &id)
virtual DComplex	getDComplex (const TableExprId &id)
virtual String	getString (const TableExprId &id)
virtual TaqlRegex	getRegex (const TableExprId &id)
virtual MVTime	getDate (const TableExprId &id)
Private Attributes
UDFBase *	itsUDF

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Detailed Description

Class representing a function in table select expression.

Intended use:

Internal

Review Status

Reviewed By:

UNKNOWN

Date Reviewed:

before2004/08/25

Prerequisite

• TableExprNodeMulti

Synopsis

This class represents a function in a table select tree. The rownumber function is represented by class TableExprNodeRownr . The rowid function is represented by class TableExprNodeRowid . The rand function is represented by class TableExprNodeRandom .

When one wants to add a function to the table selection grammar, the following has to be done:

• Add the function to the enum below.
• Implement the function in the get functions in ExprFuncNode(Array).cc.
• Implement the function in the checkOperands in ExprFuncNode.cc.
• Declare and define the function in ExprNode.h (for C++ binding).
• Add the function to findFunc in TableParse.cc (for TaQL).

Definition at line 74 of file ExprUDFNode.h.

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Constructor & Destructor Documentation

casa::TableExprUDFNode::TableExprUDFNode	(	UDFBase *	udf,
		const Table &	,
		const TableExprNodeSet &	source
	)

Constructor.

virtual casa::TableExprUDFNode::~TableExprUDFNode

(

)

[virtual]

Destructor.

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Member Function Documentation

virtual Bool casa::TableExprUDFNode::getBool

(

const TableExprId &

id

)

[virtual]

Functions to get the desired result of a function.

Reimplemented from casa::TableExprNodeRep.

virtual MVTime casa::TableExprUDFNode::getDate

(

const TableExprId &

id

)

[virtual]

Reimplemented from casa::TableExprNodeRep.

virtual DComplex casa::TableExprUDFNode::getDComplex

(

const TableExprId &

id

)

[virtual]

Reimplemented from casa::TableExprNodeRep.

virtual Double casa::TableExprUDFNode::getDouble

(

const TableExprId &

id

)

[virtual]

Reimplemented from casa::TableExprNodeRep.

virtual Int64 casa::TableExprUDFNode::getInt

(

const TableExprId &

id

)

[virtual]

Reimplemented from casa::TableExprNodeRep.

virtual TaqlRegex casa::TableExprUDFNode::getRegex

(

const TableExprId &

id

)

[virtual]

Reimplemented from casa::TableExprNodeRep.

virtual String casa::TableExprUDFNode::getString

(

const TableExprId &

id

)

[virtual]

Reimplemented from casa::TableExprNodeRep.

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Member Data Documentation

UDFBase* casa::TableExprUDFNode::itsUDF [private]

Definition at line 97 of file ExprUDFNode.h.

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

• casacore/tables/Tables/ExprUDFNode.h