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 103 of file ExprGroup.h.

Constructor & Destructor Documentation

◆ TableExprGroupKeySet()

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

Form the object from the given groupby nodes.

Member Function Documentation

◆ addKey()

void casacore::TableExprGroupKeySet::addKey ( TableExprNodeRep::NodeDataType dtype )

inline

Add a key to end the set.

Definition at line 110 of file ExprGroup.h.

References itsKeys.

◆ fill()

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

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

◆ operator<()

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

◆ operator==()

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

◆ itsKeys

vector<TableExprGroupKey> casacore::TableExprGroupKeySet::itsKeys

private

Definition at line 123 of file ExprGroup.h.

Referenced by addKey().

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

tables/TaQL/ExprGroup.h

Public Member Functions

Private Attributes