casacore::TableExprGroupKeySet Class Reference

Class representing all keys in the groupby clause. More...

#include <ExprGroup.h>

Public Member Functions
	TableExprGroupKeySet (const vector< TableExprNode > &nodes)
	Form the object from the given groupby nodes.
void	addKey (TableExprNodeRep::NodeDataType dtype)
	Add a key to end the set.
void	fill (const vector< TableExprNode > &nodes, const TableExprId &id)
	Fill the keys with the values from the nodes for this rowid.
bool	operator== (const TableExprGroupKeySet &) const
	Compare all keys in the set.
bool	operator< (const TableExprGroupKeySet &) const
Private Attributes
vector< TableExprGroupKey >	itsKeys

Detailed Description

Class representing all keys in the groupby clause.

Intended use:

Internal

Review Status

Test programs:: tTableGram

Synopsis

The GROUPBY clause consists of one or more keys, each being a scalar TaQL expression with an arbitrary data type. This class contains a set of TableExprGroupKey objects, each containing the value of a key for a particular table row.
It contains comparison functions to make it possible to use them in a std::map object to map the groupby keyset to a group.

Definition at line 105 of file ExprGroup.h.

Constructor & Destructor Documentation

casacore::TableExprGroupKeySet::TableExprGroupKeySet ( const vector< TableExprNode > & nodes )

Form the object from the given groupby nodes.

Member Function Documentation

void casacore::TableExprGroupKeySet::addKey ( TableExprNodeRep::NodeDataType dtype ) [inline]

Add a key to end the set.

Definition at line 112 of file ExprGroup.h.

References itsKeys.

void casacore::TableExprGroupKeySet::fill	(	const vector< TableExprNode > &	nodes,
		const TableExprId &	id
	)

Fill the keys with the values from the nodes for this rowid.

bool casacore::TableExprGroupKeySet::operator< ( const TableExprGroupKeySet & ) const

bool casacore::TableExprGroupKeySet::operator== ( const TableExprGroupKeySet & ) const

Compare all keys in the set.

The keyset is compared in order of key, thus the first key defines the major ordering.

Member Data Documentation

vector<TableExprGroupKey> casacore::TableExprGroupKeySet::itsKeys [private]

Definition at line 125 of file ExprGroup.h.

Referenced by addKey().

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

casacore/tables/TaQL/ExprGroup.h