Examples of org.apache.pig.experimental.plan.optimizer.Rule.match()

Package org.apache.pig.experimental.plan.optimizer

Class org.apache.pig.experimental.plan.optimizer.Rule

Examples of org.apache.pig.experimental.plan.optimizer.Rule.match()

org.apache.pig.experimental.plan.optimizer.Rule.match()
Search for all the sub-plans that matches the pattern defined by this rule. @return A list of all matched sub-plans. The returned plans arepartial views of the original OperatorPlan. Each is a sub-set of the original plan and represents the same topology as the pattern, but operators in the returned plan are the same objects as the original plan. Therefore, a call getPlan() from any node in the return plan would return the original plan. @param plan the OperatorPlan to look for matches to the pattern

         pattern.add(op3);
         pattern.connect(op1, op3);
         pattern.connect(op2, op3);
         
         Rule r = new SillyRule("basic", pattern);
         List<OperatorPlan> l = r.match(plan);
         assertEquals(1, l.size());
         OperatorPlan match = l.get(0);
         assertEquals(match.size(), 3);
         assertEquals(match.getSinks().size(), 1);
         assertEquals(match.getSinks().get(0), join);

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        // search for Load 
        OperatorPlan pattern = new SillyPlan();
        pattern.add(new OP_Load("mmm", pattern));
        
        Rule r = new SillyRule("basic", pattern);
        List<OperatorPlan> l = r.match(plan);
        assertEquals(l.size(), 2);
        
        Operator m1 = l.get(0).getSources().get(0);
        assertTrue(m1.getName().equals("p1") || m1.getName().equals("p2"));
        assertEquals(l.get(0).size(), 1);

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        // search for filter
        pattern = new SillyPlan();
        pattern.add(new OP_Filter("mmm",pattern));
        r = new SillyRule("basic", pattern);
        l = r.match(plan);
        assertEquals(l.size(), 4);
        
        m1 = l.get(0).getSources().get(0);
        assertTrue(m1.getName().equals("f1") || m1.getName().equals("f2") 
                || m1.getName().equals("f3") || m1.getName().equals("f4"));

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        // search for store
        pattern = new SillyPlan();
        pattern.add(new OP_Store("mmm",pattern));
        r = new SillyRule("basic", pattern);
        l = r.match(plan);
        assertEquals(l.size(), 2);
        
        m1 = l.get(0).getSources().get(0);
        assertTrue(m1.getName().equals("s1") || m1.getName().equals("s2"));
        assertEquals(l.get(0).size(), 1);

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        // search for split
        pattern = new SillyPlan();
        pattern.add(new OP_Split("mmm",pattern));
        r = new SillyRule("basic", pattern);
        l = r.match(plan);
        assertEquals(l.size(), 1);
        
        m1 = l.get(0).getSources().get(0);
        assertTrue(m1.getName().equals("t1"));
        assertEquals(l.get(0).size(), 1);

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        // search for join
        pattern = new SillyPlan();
        pattern.add(new OP_Join("mmm",pattern));
        r = new SillyRule("basic", pattern);
        l = r.match(plan);
        assertEquals(l.size(), 1);
        
        m1 = l.get(0).getSources().get(0);
        assertTrue(m1.getName().equals("j1"));
        assertEquals(l.get(0).size(), 1);

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        OperatorPlan pattern = new SillyPlan();
        pattern.add(new OP_Load("mmm1", pattern));
        pattern.add(new OP_Load("mmm2", pattern));
        
        Rule r = new SillyRule("basic", pattern);
        List<OperatorPlan> l = r.match(plan);
        assertEquals(l.size(), 1);
        
        assertEquals(l.get(0).getSources().size(), 2);
        assertEquals(l.get(0).getSinks().size(), 2);
        assertEquals(l.get(0).size(), 2);

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        pattern.add(s1);
        pattern.add(s2);        
        pattern.connect(s1, s2);
        
        r = new SillyRule("basic", pattern);
        l = r.match(plan);
        assertEquals(l.size(), 1);
        
        assertEquals(l.get(0).getSources().size(), 1);
        assertEquals(l.get(0).getSinks().size(), 1);
        assertEquals(l.get(0).size(), 2);

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        pattern.add(s1);
        pattern.add(s2);           
        pattern.connect(s1, s2);        
        
        r = new SillyRule("basic", pattern);
        l = r.match(plan);
        assertEquals(2, l.size());
        
        assertEquals(l.get(0).getSources().size(), 1);
        assertEquals(l.get(0).getSinks().size(), 1);

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        pattern.add(s3);
        pattern.connect(s1, s3);
        pattern.connect(s2, s3);
        
        r = new SillyRule("basic", pattern);
        l = r.match(plan);
        assertEquals(l.size(), 1);
        
        // search for split then 2 filters
        pattern = new SillyPlan();
        s1 = new OP_Split("mmm1", pattern);

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