//Power with double power
children2.clear();
children2.add(colDesc2);
children2.add(new ExprNodeConstantDesc(4.5));
mathFuncExpr.setGenericUDF(new GenericUDFPower());
mathFuncExpr.setChildren(children2);
ve = vc.getVectorExpression(mathFuncExpr);
Assert.assertEquals(FuncPowerDoubleToDouble.class, ve.getClass());
Assert.assertTrue(4.5 == ((FuncPowerDoubleToDouble) ve).getPower());