/**
* @param auop
* @return
*/
private static boolean isReplaceableUnaryAggregate(AggUnaryOp auop) {
boolean cdir = (auop.getDirection() == Direction.RowCol);
boolean cop =
(auop.getOp() == AggOp.SUM
|| auop.getOp() == AggOp.SUM_SQ
|| auop.getOp() == AggOp.MIN
|| auop.getOp() == AggOp.MAX);
return cdir && cop;
}
