Package org.apache.pig.newplan.logical.relational

Examples of org.apache.pig.newplan.logical.relational.LOCogroup

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            // collect all uids used in the filter plan
            Set<Long> uids = collectUidFromExpPlan(filterPlan);
                               
            if( pred instanceof LOCogroup ) {
                LOCogroup cogrp = (LOCogroup)pred;
                if( preds.size() == 1 ) {
                    if( hasAll( (LogicalRelationalOperator)preds.get( 0 ), uids )    ) {
                        // Order by is ok if all UIDs can be found from previous operator.
                        return true;
                    }
                } else if ( 1 == cogrp.getExpressionPlans().get( 0 ).size() && !containUDF( filterPlan ) ) {
                    // Optimization is possible if there is only a single key.
                    // For regular cogroup, we cannot use UIDs to determine if filter can be pushed up.
                    // But if there is no UDF, it's okay, as only UDF can take bag field as input.
                    return true;
                }
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    }

    @Override
    protected OperatorPlan buildPattern() {
        LogicalPlan plan = new LogicalPlan();
        LogicalRelationalOperator op = new LOCogroup(plan);
        plan.add(op);
        return plan;
    }
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    public class GroupAllParallelSetterTransformer extends Transformer {

        @Override
        public boolean check(OperatorPlan matched) throws FrontendException {
            LOCogroup group = (LOCogroup)matched.getSources().get(0);
            MultiMap<Integer, LogicalExpressionPlan> explPlans =
                group.getExpressionPlans();
            //check if the expression plan consist of just a ConstantExpression
            for(LogicalExpressionPlan ep : explPlans.values()){
                Iterator<Operator> op_iter = ep.getOperators();
                if(op_iter.hasNext()){
                    //return false if the ExpressionOperator is not
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        public void transform(OperatorPlan plan) throws FrontendException {
            Iterator<Operator> iter = plan.getOperators();
            while (iter.hasNext()) {
                Operator op = iter.next();
                if (op instanceof LOCogroup) {
                    LOCogroup group = (LOCogroup)op;
                    if(group.getRequestedParallelisam() > 1){
                        log.warn("Resetting parallism to 1 for the group/cogroup " +
                                group.getAlias() +
                        " as the group by expressions returns a constant");
                    }
                    ((LOCogroup) op).setRequestedParallelism(1);
                }
            }
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        uids.add(Long.valueOf( schema.getField(0).uid ) );
        assertEquals( false, uids.contains( schema.getField(1).uid ) );
       
        assertEquals( LOCogroup.class, newPlan.getSuccessors(newPlan.getSources().get(0)).get(0).getClass() );
        LOCogroup cogroup = (LOCogroup) newPlan.getSuccessors(newPlan.getSources().get(0)).get(0);
       
        MultiMap<Integer, LogicalExpressionPlan> expressionPlans = cogroup.getExpressionPlans();
        assertEquals( 1, expressionPlans.size() );
        List<LogicalExpressionPlan> plans = (List<LogicalExpressionPlan>) expressionPlans.get(Integer.valueOf(0));
        assertEquals( 1, plans.size() );
       
        LogicalExpressionPlan exprPlan = plans.get(0);
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        assertEquals( false, uids.contains( schema.getField(0).schema.getField(1).uid ) );
        uids.add( Long.valueOf( schema.getField(0).schema.getField(1).uid ) );       
        assertEquals( false, uids.contains( schema.getField(1).uid ) );
       
        assertEquals( LOCogroup.class, newPlan.getSuccessors(newPlan.getSources().get(0)).get(0).getClass() );
        LOCogroup cogroup = (LOCogroup) newPlan.getSuccessors(newPlan.getSources().get(0)).get(0);
       
        MultiMap<Integer, LogicalExpressionPlan> expressionPlans = cogroup.getExpressionPlans();
        assertEquals( 1, expressionPlans.size() );
        List<LogicalExpressionPlan> plans = (List<LogicalExpressionPlan>) expressionPlans.get(Integer.valueOf(0));
        assertEquals( 2, plans.size() );
       
        LogicalExpressionPlan exprPlan = plans.get(0);
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        // check basics
        org.apache.pig.newplan.logical.relational.LogicalPlan newPlan = migratePlan(plan);
       
        assertEquals( LOCogroup.class, newPlan.getSuccessors( newPlan.getSources().get(0) ).get(0).getClass() );
        LOCogroup cogroup = (LOCogroup) newPlan.getSuccessors( newPlan.getSources().get(0) ).get(0);
       
        // Reason for this strange way of getting the load schema is to maintain the sequence correctly       
        LogicalSchema loadSchema =
            ((LogicalRelationalOperator)newPlan.getPredecessors(cogroup).get(0)).getSchema();
       
        LogicalSchema load2Schema =
            ((LogicalRelationalOperator)newPlan.getPredecessors(cogroup).get(1)).getSchema();
       
        Set<Long> uids = getAllUids(loadSchema);
        uids.addAll( getAllUids( load2Schema ) );
       
        LogicalRelationalOperator op = (LogicalRelationalOperator)
            newPlan.getSuccessors( newPlan.getSources().get(0) ).get(0);
        assertEquals( LOCogroup.class, op.getClass() );
        LogicalSchema schema = op.getSchema();
       
        assertEquals( 3, schema.size() );
        assertEquals( DataType.CHARARRAY, schema.getField(0).type );
        assertEquals( false, uids.contains( schema.getField(0).uid ) );
        assertEquals( 0, schema.getField(0).alias.compareTo("group") );

        assertEquals( DataType.BAG, schema.getField(1).type );
       
        assertEquals( DataType.CHARARRAY, schema.getField(1).schema.getField(0).type );
        assertEquals( 0, schema.getField(1).schema.getField(0).alias.compareTo("name") );
        assertEquals( loadSchema.getField(0).uid, schema.getField(1).schema.getField(0).uid );
        assertEquals( DataType.INTEGER, schema.getField(1).schema.getField(1).type );
        assertEquals( 0, schema.getField(1).schema.getField(1).alias.compareTo("age") );
        assertEquals( loadSchema.getField(1).uid, schema.getField(1).schema.getField(1).uid );
        assertEquals( DataType.FLOAT, schema.getField(1).schema.getField(2).type );
        assertEquals( 0, schema.getField(1).schema.getField(2).alias.compareTo("gpa") );
        assertEquals( loadSchema.getField(2).uid, schema.getField(1).schema.getField(2).uid );
       
        assertEquals( DataType.BAG, schema.getField(2).type );
       
        assertEquals( DataType.CHARARRAY, schema.getField(2).schema.getField(0).type );
        assertEquals( 0, schema.getField(2).schema.getField(0).alias.compareTo("name") );
        assertEquals( load2Schema.getField(0).uid, schema.getField(2).schema.getField(0).uid );
        assertEquals( DataType.CHARARRAY, schema.getField(2).schema.getField(1).type );
        assertEquals( 0, schema.getField(2).schema.getField(1).alias.compareTo("blah") );
        assertEquals( load2Schema.getField(1).uid, schema.getField(2).schema.getField(1).uid );       
       
       
        // We are doing Uid tests at the end as the uids should not repeat               
        assertEquals( false, uids.contains( schema.getField(1).uid ) );
        uids.add( schema.getField(1).uid );
        assertEquals( false, uids.contains( schema.getField(2).uid) );
       
        MultiMap<Integer, LogicalExpressionPlan> expressionPlans = cogroup.getExpressionPlans();
        assertEquals( 2, expressionPlans.size() );
        List<LogicalExpressionPlan> plans = (List<LogicalExpressionPlan>) expressionPlans.get(Integer.valueOf(0));
        assertEquals( 1, plans.size() );
       
        List<LogicalExpressionPlan> plans2 = (List<LogicalExpressionPlan>) expressionPlans.get(Integer.valueOf(1));
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        // check basics
        org.apache.pig.newplan.logical.relational.LogicalPlan newPlan = migratePlan(plan);
       
        assertEquals( LOCogroup.class, newPlan.getSuccessors( newPlan.getSources().get(0) ).get(0).getClass() );
        LOCogroup cogroup = (LOCogroup) newPlan.getSuccessors( newPlan.getSources().get(0) ).get(0);
       
        // Reason for this strange way of getting the load schema is to maintain the sequence correctly       
        LogicalSchema loadSchema =
            ((LogicalRelationalOperator)newPlan.getPredecessors(cogroup).get(0)).getSchema();
       
        LogicalSchema load2Schema =
            ((LogicalRelationalOperator)newPlan.getPredecessors(cogroup).get(1)).getSchema();
       
        Set<Long> uids = getAllUids(loadSchema);
        uids.addAll( getAllUids( load2Schema ) );
       
        LogicalRelationalOperator op = (LogicalRelationalOperator)
            newPlan.getSuccessors( newPlan.getSources().get(0) ).get(0);
        assertEquals( LOCogroup.class, op.getClass() );
        LogicalSchema schema = op.getSchema();
       
        assertEquals( 3, schema.size() );
        assertEquals( DataType.TUPLE, schema.getField(0).type );
        assertEquals( false, uids.contains( schema.getField(0).uid ) );
        assertEquals( 0, schema.getField(0).alias.compareTo("group") );
        assertEquals( DataType.CHARARRAY, schema.getField(0).schema.getField(0).type );
        assertEquals( 0, schema.getField(0).schema.getField(0).alias.compareTo("name") );
        assertEquals( DataType.INTEGER, schema.getField(0).schema.getField(1).type );
        assertEquals( 0, schema.getField(0).schema.getField(1).alias.compareTo("age") );               
              

        assertEquals( DataType.BAG, schema.getField(1).type );
       
        assertEquals( DataType.CHARARRAY, schema.getField(1).schema.getField(0).type );
        assertEquals( 0, schema.getField(1).schema.getField(0).alias.compareTo("name") );
        assertEquals( loadSchema.getField(0).uid, schema.getField(1).schema.getField(0).uid );
        assertEquals( DataType.INTEGER, schema.getField(1).schema.getField(1).type );
        assertEquals( 0, schema.getField(1).schema.getField(1).alias.compareTo("age") );
        assertEquals( loadSchema.getField(1).uid, schema.getField(1).schema.getField(1).uid );
        assertEquals( DataType.FLOAT, schema.getField(1).schema.getField(2).type );
        assertEquals( 0, schema.getField(1).schema.getField(2).alias.compareTo("gpa") );
        assertEquals( loadSchema.getField(2).uid, schema.getField(1).schema.getField(2).uid );
       
        assertEquals( DataType.BAG, schema.getField(2).type );
       
        assertEquals( DataType.CHARARRAY, schema.getField(2).schema.getField(0).type );
        assertEquals( 0, schema.getField(2).schema.getField(0).alias.compareTo("name") );
        assertEquals( load2Schema.getField(0).uid, schema.getField(2).schema.getField(0).uid );
        assertEquals( DataType.INTEGER, schema.getField(2).schema.getField(1).type );
        assertEquals( 0, schema.getField(2).schema.getField(1).alias.compareTo("age") );
        assertEquals( load2Schema.getField(1).uid, schema.getField(2).schema.getField(1).uid );
        assertEquals( DataType.CHARARRAY, schema.getField(2).schema.getField(2).type );
        assertEquals( 0, schema.getField(2).schema.getField(2).alias.compareTo("blah") );
        assertEquals( load2Schema.getField(2).uid, schema.getField(2).schema.getField(2).uid );       
       
       
        // We are doing Uid tests at the end as the uids should not repeat
        assertEquals( false, uids.contains( schema.getField(0).schema.getField(0).uid ) );
        assertEquals( false, uids.contains( schema.getField(0).schema.getField(1).uid ) );
        assertEquals( false, uids.contains( schema.getField(1).uid ) );
        uids.add( schema.getField(1).uid );
        assertEquals( false, uids.contains( schema.getField(2).uid) );
       
       
        MultiMap<Integer, LogicalExpressionPlan> expressionPlans = cogroup.getExpressionPlans();
        assertEquals( 2, expressionPlans.size() );
        List<LogicalExpressionPlan> plans = (List<LogicalExpressionPlan>) expressionPlans.get(Integer.valueOf(0));
        assertEquals( 2, plans.size() );
       
        List<LogicalExpressionPlan> plans2 = (List<LogicalExpressionPlan>) expressionPlans.get(Integer.valueOf(1));
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            "store B into '111';";
       
        LogicalPlan lp = Util.parseAndPreprocess(query, pc);
        Util.optimizeNewLP(lp);
        LOStore loStore = (LOStore)lp.getSinks().get(0);
        LOCogroup loCoGroup = (LOCogroup)lp.getPredecessors(loStore).get(0);
        LogicalFieldSchema groupFieldSchema = loCoGroup.getSchema().getField(0);
        Assert.assertTrue(groupFieldSchema.type==DataType.TUPLE);
        Assert.assertTrue(groupFieldSchema.schema==null);
    }
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            // collect all uids used in the filter plan
            Set<Long> uids = collectUidFromExpPlan(filterPlan);
                               
            if( pred instanceof LOCogroup ) {
                LOCogroup cogrp = (LOCogroup)pred;
                if( preds.size() == 1 ) {
                    if( hasAll( (LogicalRelationalOperator)preds.get( 0 ), uids )    ) {
                        // Order by is ok if all UIDs can be found from previous operator.
                        return true;
                    }
                } else if ( 1 == cogrp.getExpressionPlans().get( 0 ).size() && !containUDF( filterPlan ) ) {
                    // Optimization is possible if there is only a single key.
                    // For regular cogroup, we cannot use UIDs to determine if filter can be pushed up.
                    // But if there is no UDF, it's okay, as only UDF can take bag field as input.
                    return true;
                }
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Related Classes of org.apache.pig.newplan.logical.relational.LOCogroup

  • org.apache.pig.newplan.logical.expression.LogicalExpression
  • org.apache.pig.newplan.logical.relational.LogicalSchema.LogicalFieldSchema
  • org.apache.pig.newplan.logical.rules.GroupByConstParallelSetter
  • org.apache.pig.newplan.logical.rules.GroupByConstParallelSetter$GroupAllParallelSetterTransformer
  • org.apache.pig.newplan.logical.rules.PushUpFilter$PushUpFilterTransformer
  • org.apache.pig.parser.LogicalPlanBuilder
  • org.apache.pig.pen.LineageTrimmingVisitor
  • org.apache.pig.test.TestCollectedGroup
  • org.apache.pig.test.TestLogicalPlanBuilder
  • org.apache.pig.test.TestLogicalPlanMigrationVisitor
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