Package org.apache.pig.experimental.logical.expression

Examples of org.apache.pig.experimental.logical.expression.IsNullExpression

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        assertEquals( 1, filPlan.getSources().size() );
        assertEquals( 2, filPlan.size() );
        assertEquals( 1, filPlan.getSinks().size() );
        assertEquals( IsNullExpression.class, filPlan.getSources().get(0).getClass() );
        IsNullExpression isNull = (IsNullExpression)filPlan.getSources().get(0);
        assertTrue( ls.getField(0).uid != isNull.getUid() );
        assertTrue( ls.getField(1).uid != isNull.getUid() );
       
        assertEquals( ProjectExpression.class, isNull.getExpression().getClass() );
        ProjectExpression prj = (ProjectExpression) isNull.getExpression();
        assertEquals( ls.getField(0).uid, prj.getUid() );
    }
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        assertEquals( NotExpression.class, filPlan.getSources().get(0).getClass() );
        NotExpression notExp = (NotExpression)filPlan.getSources().get(0);
        assertTrue( ls.getField(0).uid != notExp.getUid() );
        assertTrue( ls.getField(1).uid != notExp.getUid() );
        assertEquals( IsNullExpression.class, notExp.getExpression().getClass() );
        IsNullExpression isNull = (IsNullExpression)notExp.getExpression();
        assertTrue( ls.getField(0).uid != isNull.getUid() );
        assertTrue( ls.getField(1).uid != isNull.getUid() );
       
        assertEquals( ProjectExpression.class, isNull.getExpression().getClass() );
        ProjectExpression prj = (ProjectExpression) isNull.getExpression();
        assertEquals( ls.getField(0).uid, prj.getUid() );
    }
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            exprOpsMap.put(uniOp, not);
        }

        public void visit(LOIsNull uniOp) throws VisitorException {
            ExpressionOperator exp = uniOp.getOperand();
            IsNullExpression isNull = new IsNullExpression(exprPlan, DataType.BOOLEAN, exprOpsMap.get(exp));
            exprOpsMap.put(uniOp, isNull);
        }
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