casa::TableExprNodeRecordField Class Reference

Scalar field in record select expression tree. More...

#include <ExprNodeRecord.h>

Inheritance diagram for casa::TableExprNodeRecordField:

List of all members.

Public Member Functions
	TableExprNodeRecordField (DataType dtype, const Block< Int > &fieldNumbers)
	~TableExprNodeRecordField ()
virtual const IPosition &	getShape (const TableExprId &id)
	Get the shape for the given row.
virtual Bool	isDefined (const TableExprId &id)
	Is the value in the given row defined? The default implementation returns True.
virtual Bool	getBool (const TableExprId &id)
	Is the expression a column aggregate 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)
Protected Member Functions
const RecordInterface &	getRecord (const TableExprId &id) const
	Get the record for the last field number, thus going through all subrecords for the other field numbers.
Protected Attributes
Block< Int >	fieldNrs_p
uInt	lastEntry_p

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Detailed Description

Scalar field in record select expression tree.

Intended use:

Internal

Review Status

Reviewed By:

UNKNOWN

Date Reviewed:

before2004/08/25

Prerequisite

• TableExprNode

Synopsis

This class represents a scalar column in a table select expression tree. When the select expression gets evaluated, the value of the given row in the column is used.

Definition at line 76 of file ExprNodeRecord.h.

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Constructor & Destructor Documentation

casa::TableExprNodeRecordField::TableExprNodeRecordField	(	DataType	dtype,
		const Block< Int > &	fieldNumbers
	)

casa::TableExprNodeRecordField::~TableExprNodeRecordField

(

)

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Member Function Documentation

virtual Bool casa::TableExprNodeRecordField::getBool

(

const TableExprId &

id

)

[virtual]

Is the expression a column aggregate function?

virtual Bool isAggregate() const; Get a scalar value for this node in the given row. The appropriate functions are implemented in the derived classes and will usually invoke the get in their children and apply the operator on the resulting values.

Reimplemented from casa::TableExprNodeRep.

virtual DComplex casa::TableExprNodeRecordField::getDComplex

(

const TableExprId &

id

)

[virtual]

Reimplemented from casa::TableExprNodeRep.

virtual Double casa::TableExprNodeRecordField::getDouble

(

const TableExprId &

id

)

[virtual]

Reimplemented from casa::TableExprNodeRep.

virtual Int64 casa::TableExprNodeRecordField::getInt

(

const TableExprId &

id

)

[virtual]

Reimplemented from casa::TableExprNodeRep.

const RecordInterface& casa::TableExprNodeRecordField::getRecord

(

const TableExprId &

id

)

const [protected]

Get the record for the last field number, thus going through all subrecords for the other field numbers.

virtual const IPosition& casa::TableExprNodeRecordField::getShape

(

const TableExprId &

id

)

[virtual]

Get the shape for the given row.

Reimplemented from casa::TableExprNodeRep.

virtual String casa::TableExprNodeRecordField::getString

(

const TableExprId &

id

)

[virtual]

Reimplemented from casa::TableExprNodeRep.

virtual Bool casa::TableExprNodeRecordField::isDefined

(

const TableExprId &

id

)

[virtual]

Is the value in the given row defined? The default implementation returns True.

Reimplemented from casa::TableExprNodeRep.

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Member Data Documentation

Block<Int> casa::TableExprNodeRecordField::fieldNrs_p [protected]

Definition at line 93 of file ExprNodeRecord.h.

uInt casa::TableExprNodeRecordField::lastEntry_p [protected]

Definition at line 94 of file ExprNodeRecord.h.

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

• casacore/tables/Tables/ExprNodeRecord.h