Method getPredecessors

src/org/apache/pig/newplan/OperatorPlan.java:66–66

For a given operator, get all operators immediately before it in the plan. @param op operator to fetch predecessors of @return list of all operators immediately before op, or an empty list if op is a root.

(Operator op)

     * if op is a root.
     */
    public List<Operator> getPredecessors(Operator op);
    
    /**
     * For a given operator, get all operators immediately after it.