ca.uwaterloo.cs.ql.interp.select
Class ColumnNode
java.lang.Object
ca.uwaterloo.cs.ql.interp.SyntaxTreeNode
ca.uwaterloo.cs.ql.interp.ExpressionNode
ca.uwaterloo.cs.ql.interp.select.ColumnNode
- Direct Known Subclasses:
- ColumnAttributeNode
public class ColumnNode
- extends ExpressionNode
| Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, wait, wait, wait |
ColumnNode
public ColumnNode()
ColumnNode
public ColumnNode(int col)
getColumn
public int getColumn()
setPositive
public void setPositive(boolean b)
propagate
public void propagate(Env env,
java.lang.Object userObj)
throws EvaluationException
- Specified by:
propagate in class SyntaxTreeNode
- Throws:
EvaluationException
evaluate
public Value evaluate(Env env)
throws EvaluationException
- Specified by:
evaluate in class SyntaxTreeNode
- Throws:
EvaluationException
toString
public java.lang.String toString()
- Overrides:
toString in class java.lang.Object