org.apache.pig.experimental.logical.expression
Class IsNullExpression
java.lang.Object
org.apache.pig.experimental.plan.Operator
org.apache.pig.experimental.logical.expression.LogicalExpression
org.apache.pig.experimental.logical.expression.UnaryExpression
org.apache.pig.experimental.logical.expression.IsNullExpression
public class IsNullExpression
- extends UnaryExpression
IsNullExpression
public IsNullExpression(OperatorPlan plan,
byte b,
LogicalExpression exp)
accept
public void accept(PlanVisitor v)
throws IOException
- Description copied from class:
Operator
- Accept a visitor at this node in the graph.
- Specified by:
accept
in class Operator
- Parameters:
v
- Visitor to accept.
- Throws:
IOException
isEqual
public boolean isEqual(Operator other)
- Description copied from class:
Operator
- This is like a shallow equals comparison.
It returns true if two operators have equivalent properties even if they are
different objects. Here properties mean equivalent plan and equivalent name.
- Specified by:
isEqual
in class Operator
- Returns:
- true if two object have equivalent properties, else false
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