class RelQueryClass : public XxxQueryDag

Encapsulates a relational query

Inheritance:

Public Fields

RelQueryNode*

Root The root (final) node of the query tree

Public Methods

virtual XxxADTMetaInfo*	GenerateCatInfo () Generates catalog information for the query
virtual XxxBasicType	GenerateType () / Returns the type of the query. (Always RelationTypeId.)
virtual XxxErrCode	GetDependencies (XxxBitMap& Dependency, int CorrelationHt) / Used to get correlation dependencies
virtual void	Print (ostream& OStr) / Prints a textual version of this query.
	RelQueryClass (RelQueryNode* RootNode) / Constructor.
virtual XxxGenericParse*	Replicate () / Return a copy of this object, sharing the same underlying query tree
virtual	~RelQueryClass () / Destructor. Reclaims the underlying query tree.

Inherited from XxxQueryDag:

RelQueryNode* Root

The root (final) node of the query tree

RelQueryClass(RelQueryNode* RootNode)

/ Constructor.

virtual XxxGenericParse* Replicate()

/ Return a copy of this object, sharing the same underlying query tree

virtual ~RelQueryClass()

/ Destructor. Reclaims the underlying query tree.

virtual void Print(ostream& OStr)

/ Prints a textual version of this query.

virtual XxxADTMetaInfo* GenerateCatInfo()

Generates catalog information for the query. This is calculated by returning the root's output catalog information.

virtual XxxBasicType GenerateType()

/ Returns the type of the query. (Always RelationTypeId.)

virtual XxxErrCode GetDependencies(XxxBitMap& Dependency, int CorrelationHt)

/ Used to get correlation dependencies

alphabetic index hierarchy of classes

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