gudusoft.gsqlparser.ir.logical

Class RelNode

Object

gudusoft.gsqlparser.ir.logical.RelNode

Direct Known Subclasses:

Aggregate, DmlDelete, DmlInsert, DmlMerge, DmlUpdate, Filter, Join, Project, SetOp, Sort, TableScan, VendorSpecificRel

public abstract class RelNode
extends Object

Base class for all relational nodes in the Logical IR.

All trees are immutable after construction. Traversal must use iterative visitor with explicit Deque<RelNode> stack (no recursion).

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	RelNode(RelNodeKind kind, SourceAnchor anchor)

Method Summary

Modifier and Type	Method and Description
abstract <R> R	accept(RelNodeVisitor<R> visitor) Accept method for the visitor pattern.
SourceAnchor	getAnchor()
abstract List<RelNode>	getInputs() Returns the child RelNodes of this node (for iterative traversal).
RelNodeKind	getKind()
String	toString()

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

RelNode

protected RelNode(RelNodeKind kind,
                  SourceAnchor anchor)

Method Detail

getKind

public RelNodeKind getKind()

getAnchor

public SourceAnchor getAnchor()

getInputs

public abstract List<RelNode> getInputs()

Returns the child RelNodes of this node (for iterative traversal).

accept

public abstract <R> R accept(RelNodeVisitor<R> visitor)

Accept method for the visitor pattern.

toString

public String toString()

Overrides:

toString in class Object