ca.uwaterloo.cs.ql.interp.select
Class SelectProjectionNode

java.lang.Object
  extended by ca.uwaterloo.cs.ql.interp.SyntaxTreeNode
      extended by ca.uwaterloo.cs.ql.interp.ExpressionNode
          extended by ca.uwaterloo.cs.ql.interp.select.SelectConditionNode
              extended by ca.uwaterloo.cs.ql.interp.select.SelectProjectionNode

public class SelectProjectionNode
extends SelectConditionNode


Constructor Summary
SelectProjectionNode(java.util.ArrayList columnList)
           
 
Method Summary
 TupleSet evaluate(Env env, TupleSet tSet)
           
 void propagate(Env env, java.lang.Object userObj)
           
 java.lang.String toString()
           
 
Methods inherited from class ca.uwaterloo.cs.ql.interp.select.SelectConditionNode
evaluate
 
Methods inherited from class ca.uwaterloo.cs.ql.interp.SyntaxTreeNode
getLocation, setLocation, strLocation
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

SelectProjectionNode

public SelectProjectionNode(java.util.ArrayList columnList)
Method Detail

propagate

public void propagate(Env env,
                      java.lang.Object userObj)
               throws EvaluationException
Specified by:
propagate in class SyntaxTreeNode
Throws:
EvaluationException

evaluate

public TupleSet evaluate(Env env,
                         TupleSet tSet)
                  throws EvaluationException
Specified by:
evaluate in class SelectConditionNode
Throws:
EvaluationException

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object