Examples of org.apache.pig.impl.eval.FilterSpec

            
            // note: if there are no output constraints, we don't have to do anything because the input operator
            // will ensure that we get at least one input tuple, which in turns ensures that we output at least one tuple
            
        } else if (spec instanceof FilterSpec) {
            FilterSpec fSpec = (FilterSpec) spec;
            
            Cond filterCond = fSpec.cond;
            
            // if necessary, insert one or more positive examples (i.e. tuples that pass the filter)
            if (outputConstraints.cardinality() > 0) {     // there's one or more output constraints; generate corresponding input constraints

        Collection<IdentityHashSet<Tuple>> equivClasses = new LinkedList<IdentityHashSet<Tuple>>();
        
        EvalSpec spec = op.getSpec();
        
        if (spec instanceof FilterSpec) {    // it's a FILTER
            FilterSpec fSpec = (FilterSpec) spec;


            // make two equivalence classes: one for tuples that pass the filter, and one for tuples that fail the filter
            IdentityHashSet<Tuple> pass = new IdentityHashSet<Tuple>();
            IdentityHashSet<Tuple> fail = new IdentityHashSet<Tuple>();
            equivClasses.add(pass);

Related Classes of org.apache.pig.impl.eval.FilterSpec

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