org.apache.tajo.plan.expr

Class SimpleEvalNodeVisitor<CONTEXT>

java.lang.Object

org.apache.tajo.plan.expr.SimpleEvalNodeVisitor<CONTEXT>

Direct Known Subclasses:

ConstantFolding, ConstantPropagation, EvalNodeSerializer

public abstract class SimpleEvalNodeVisitor<CONTEXT>
extends Object

It provides simple visitor methods for an expression tree. Since SimpleEvalNodeVisitor provides fewer visitor methods, it allows users to write a simple rewriter for expression trees.

Constructor Summary

Constructors

Constructor and Description
SimpleEvalNodeVisitor()

Method Summary

Methods

Modifier and Type	Method and Description
EvalNode	visit(CONTEXT context, EvalNode evalNode, Stack<EvalNode> stack)
protected EvalNode	visitBetween(CONTEXT context, BetweenPredicateEval evalNode, Stack<EvalNode> stack)
protected EvalNode	visitBinaryEval(CONTEXT context, Stack<EvalNode> stack, BinaryEval binaryEval)
protected EvalNode	visitCaseWhen(CONTEXT context, CaseWhenEval evalNode, Stack<EvalNode> stack)
protected EvalNode	visitConst(CONTEXT context, ConstEval evalNode, Stack<EvalNode> stack)
protected EvalNode	visitDefaultFunctionEval(CONTEXT context, Stack<EvalNode> stack, FunctionEval functionEval)
protected EvalNode	visitField(CONTEXT context, Stack<EvalNode> stack, FieldEval evalNode)
protected EvalNode	visitFuncCall(CONTEXT context, FunctionEval evalNode, Stack<EvalNode> stack)
protected EvalNode	visitIfThen(CONTEXT context, CaseWhenEval.IfThenEval evalNode, Stack<EvalNode> stack)
protected EvalNode	visitInPredicate(CONTEXT context, InEval evalNode, Stack<EvalNode> stack)
protected EvalNode	visitRowConstant(CONTEXT context, RowConstantEval evalNode, Stack<EvalNode> stack)
protected EvalNode	visitUnaryEval(CONTEXT context, Stack<EvalNode> stack, UnaryEval unaryEval)

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleEvalNodeVisitor

public SimpleEvalNodeVisitor()

Method Detail

visit

public EvalNode visit(CONTEXT context,
             EvalNode evalNode,
             Stack<EvalNode> stack)

visitUnaryEval

protected EvalNode visitUnaryEval(CONTEXT context,
                      Stack<EvalNode> stack,
                      UnaryEval unaryEval)

visitBinaryEval

protected EvalNode visitBinaryEval(CONTEXT context,
                       Stack<EvalNode> stack,
                       BinaryEval binaryEval)

visitDefaultFunctionEval

protected EvalNode visitDefaultFunctionEval(CONTEXT context,
                                Stack<EvalNode> stack,
                                FunctionEval functionEval)

visitConst

protected EvalNode visitConst(CONTEXT context,
                  ConstEval evalNode,
                  Stack<EvalNode> stack)

visitRowConstant

protected EvalNode visitRowConstant(CONTEXT context,
                        RowConstantEval evalNode,
                        Stack<EvalNode> stack)

visitField

protected EvalNode visitField(CONTEXT context,
                  Stack<EvalNode> stack,
                  FieldEval evalNode)

visitBetween

protected EvalNode visitBetween(CONTEXT context,
                    BetweenPredicateEval evalNode,
                    Stack<EvalNode> stack)

visitCaseWhen

protected EvalNode visitCaseWhen(CONTEXT context,
                     CaseWhenEval evalNode,
                     Stack<EvalNode> stack)

visitIfThen

protected EvalNode visitIfThen(CONTEXT context,
                   CaseWhenEval.IfThenEval evalNode,
                   Stack<EvalNode> stack)

visitInPredicate

protected EvalNode visitInPredicate(CONTEXT context,
                        InEval evalNode,
                        Stack<EvalNode> stack)

visitFuncCall

protected EvalNode visitFuncCall(CONTEXT context,
                     FunctionEval evalNode,
                     Stack<EvalNode> stack)