Package org.apache.pig.newplan.logical.expression

Examples of org.apache.pig.newplan.logical.expression.ProjectExpression

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                opsList.add(opsIterator.next());
            }
            if(opsList.size() != 1 || !(opsList.get(0) instanceof ProjectExpression)) {
                throw new FrontendException("Unsupported operator in inner plan: " + opsList.get(0), 2237);
            }
            ProjectExpression project = (ProjectExpression) opsList.get(0);
            int sortColIndex = project.getColNum();
            String sortColName = (schema == null) ? null :
                schema.getField(sortColIndex).alias;
            sortColInfoList.add(new SortColInfo(sortColName, sortColIndex,
                    mAscCols.get(i)? SortColInfo.Order.ASCENDING :
                        SortColInfo.Order.DESCENDING));
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        // store column number as a ProjectExpression in a plan
        // to be able to dynamically adjust column number during optimization
        LogicalExpressionPlan exp = new LogicalExpressionPlan();
       
        // we don't care about type, so set to -1
        prj = new ProjectExpression(exp, 0, colNum, foreach);
        this.foreach = foreach;
    }
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                    LOInnerLoad innerLoad = new LOInnerLoad(innerPlan, foreach, rf.getIndex());                   
                    innerPlan.add(innerLoad);         
                    innerPlan.connect(innerLoad, gen);
                   
                    LogicalExpressionPlan exp = new LogicalExpressionPlan();
                    ProjectExpression prj = new ProjectExpression(exp, i, -1, gen);
                    exp.add(prj);
                    exps.add(exp);
                }               
              
            } else {
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        }
       
        // If project of the innerLoad is not in INPUTUIDS, remove this innerLoad
        Set<LOInnerLoad> innerLoadsToRemove = new HashSet<LOInnerLoad>();
        for (LOInnerLoad innerLoad: innerLoads) {
            ProjectExpression project = innerLoad.getProjection();
            if (project.isProjectStar()) {
                LogicalSchema.LogicalFieldSchema tupleFS = project.getFieldSchema();
                // Check the first component of the star projection
                long uid = tupleFS.schema.getField(0).uid;
                if (!inputUids.contains(uid))
                    innerLoadsToRemove.add(innerLoad);
            }
            else {
                if (!inputUids.contains(project.getFieldSchema().uid))
                    innerLoadsToRemove.add(innerLoad);
            }
        }
       
        // Find the logical operator immediate precede LOGenerate which should be removed (the whole branch)
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                innerPlan.add(innerLoad);         
                innerPlan.connect(innerLoad, gen);
               
                LogicalExpressionPlan exp = new LogicalExpressionPlan();
               
                ProjectExpression prj = new ProjectExpression(exp, i, 0, gen);
                exp.add(prj);
               
                if (fs.type != DataType.BYTEARRAY && (determinedSchema == null || (!fs.isEqual(determinedSchema.getField(i))))) {
                    // Either no schema was determined by loader OR the type
                    // from the "determinedSchema" is different
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                List<Operator> exp2Sinks = new ArrayList<Operator>();
                exp2Sinks.addAll(newExpPlan.getSinks());
                for (Operator exp2Sink : exp2Sinks) {
                    if (exp2Sink instanceof ProjectExpression) {
                        // Find referred expression plan in 1st ForEach
                        ProjectExpression proj = (ProjectExpression)exp2Sink;
                        LOInnerLoad innerLoad = (LOInnerLoad)foreach2.getInnerPlan().getPredecessors(gen2).get(proj.getInputNum());
                        int exp1Pos = innerLoad.getProjection().getColNum();
                        LogicalExpressionPlan exp1 = gen1.getOutputPlans().get(exp1Pos);
                        LogicalExpressionPlan exp1Copy = exp1.deepCopy();
                        List<Operator> exp1Sources = newExpPlan.merge(exp1Copy);
                       
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                         List<Operator> srcs = exp.getSinks();
                         for (Operator src : srcs) {
                             if (src instanceof ProjectExpression) {
                                 List<LOInnerLoad> innerLoads = LOForEach.findReacheableInnerLoadFromBoundaryProject((ProjectExpression)src);
                                 for (LOInnerLoad innerLoad : innerLoads) {
                                     ProjectExpression prj = innerLoad.getProjection();
                                     if (prj.isProjectStar()) {
                                         if (prj.findReferent().getSchema()!=null) {
                                             for (LogicalSchema.LogicalFieldSchema fs : prj.findReferent().getSchema().getFields()) {
                                                 input.add(fs.uid);
                                             }
                                         }
                                     }
                                     else {
                                         if (prj.findReferent().getSchema()!=null) {
                                             LogicalSchema.LogicalFieldSchema fs = prj.findReferent().getSchema().getField(prj.getColNum());
                                             input.add(fs.uid);
                                         }
                                     }
                                 }
                             }
                         }
                     }
                 }
             }
             
             // for the flatten bag, we need to make sure at least one field is in the input
             for(int i=0; i<ll.size(); i++) {
                 if (!gen.getFlattenFlags()[i]) {
                     continue;
                 }
                 LogicalExpressionPlan exp = ll.get(i);
                 LogicalExpression sink = (LogicalExpression)exp.getSources().get(0);
                 if (sink.getFieldSchema().type!=DataType.TUPLE && sink.getFieldSchema().type!=DataType.BAG)
                     continue;
                 List<Operator> srcs = exp.getSinks();
                 for (Operator src : srcs) {
                     if (!(src instanceof ProjectExpression))
                         continue;
                     List<LOInnerLoad> innerLoads = LOForEach.findReacheableInnerLoadFromBoundaryProject((ProjectExpression)src);
                     for (LOInnerLoad innerLoad : innerLoads) {
                         ProjectExpression prj = innerLoad.getProjection();
                         if (prj.isProjectStar()) {
                             if (prj.findReferent().getSchema()!=null) {
                                 for (LogicalSchema.LogicalFieldSchema fs : prj.findReferent().getSchema().getFields()) {
                                     input.add(fs.uid);
                                 }
                             }
                         }
                         else {
                             if (prj.findReferent().getSchema()!=null) {
                                 LogicalSchema.LogicalFieldSchema fs = prj.findReferent().getSchema().getField(prj.getColNum());
                                 input.add(fs.uid);
                             }
                         }
                     }
                 }
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                // Now, reset the projection expressions in the new filter plan.
                sinks = fPlan.getSinks();
                for( Operator sink : sinks ) {
                    if( sink instanceof ProjectExpression ) {
                        ProjectExpression projE = (ProjectExpression)sink;
                         projE.setAttachedRelationalOp( newFilter );
                         projE.setInputNum( 0 );
                         projE.setColNum( projE.getColNum() - columnOffset );
                    }
                 }
                newFilter.setFilterPlan( fPlan );
               
                insertFilter( pred, predecessor, newFilter );
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              "b", null, DataType.BYTEARRAY));
          MultiMap<Integer, LogicalExpressionPlan> mm =
                new MultiMap<Integer, LogicalExpressionPlan>();
          LogicalExpressionPlan aprojplan = new LogicalExpressionPlan();
          LOJoin C = new LOJoin(lp, mm, JOINTYPE.HASH, new boolean[] {true, true});
          new ProjectExpression(aprojplan, 0, 0, C);
          LogicalExpressionPlan bprojplan = new LogicalExpressionPlan();
          new ProjectExpression(bprojplan, 1, 0, C);
          mm.put(0, aprojplan);
          mm.put(1, bprojplan);
         
          C.setAlias("C");
          lp.add(C);
          lp.connect(A, C);
          lp.connect(B, C);
       
          // D = filter
          LogicalExpressionPlan filterPlan = new LogicalExpressionPlan();
          LOFilter D = new LOFilter(lp, filterPlan);
          ProjectExpression fx = new ProjectExpression(filterPlan, 0, 0, D);
          ConstantExpression fc0 = new ConstantExpression(filterPlan, new Integer(0), new LogicalFieldSchema(null, null, DataType.BYTEARRAY));
          EqualExpression eq1 = new EqualExpression(filterPlan, fx, fc0);
          ProjectExpression fanotherx = new ProjectExpression(filterPlan, 0, 0, D);
          ProjectExpression fa = new ProjectExpression(filterPlan, 0, 2, D);
          EqualExpression eq2 = new EqualExpression(filterPlan, fanotherx, fa);
          AndExpression and1 = new AndExpression(filterPlan, eq1, eq2);
          ProjectExpression fb = new ProjectExpression(filterPlan, 0, 3, D);
          ConstantExpression fc1 = new ConstantExpression(filterPlan, new Integer(1),new LogicalFieldSchema(null, null, DataType.BYTEARRAY));
          EqualExpression eq3 = new EqualExpression(filterPlan, fb, fc1);
          AndExpression and2 = new AndExpression(filterPlan, and1, eq3);
          ProjectExpression fanotherb = new ProjectExpression(filterPlan, 0, 3, D);
          ProjectExpression fy = new ProjectExpression(filterPlan, 0, 1, D);
          EqualExpression eq4 = new EqualExpression(filterPlan, fy, fanotherb);
          new AndExpression(filterPlan, and2, eq4);
         
          D.setAlias("D");
          // Connect D to B, since the transform has happened.
          lp.add(D);
          lp.connect(C, D);
        }
       
        System.out.println(lp);
        LogicalPlanOptimizer optimizer = new LogicalPlanOptimizer(lp, 500, null);
        optimizer.optimize();
       
        LogicalPlan expected = new LogicalPlan();
        {
            // A = load
          LogicalSchema aschema = new LogicalSchema();
          aschema.addField(new LogicalSchema.LogicalFieldSchema(
              "x", null, DataType.BYTEARRAY));
          aschema.addField(new LogicalSchema.LogicalFieldSchema(
              "y", null, DataType.BYTEARRAY));
          LOLoad A = new LOLoad(new FileSpec("bla", new FuncSpec("PigStorage", "\t")), aschema, expected, null);
          expected.add(A);
         
          // DA = filter
          LogicalExpressionPlan DAfilterPlan = new LogicalExpressionPlan();
          LOFilter DA = new LOFilter(expected, DAfilterPlan);
          ProjectExpression fx = new ProjectExpression(DAfilterPlan, 0, 0, DA);
          fx.neverUseForRealSetFieldSchema(new LogicalFieldSchema(null, null, DataType.BYTEARRAY));
          ConstantExpression fc0 = new ConstantExpression(DAfilterPlan, new Integer(0), new LogicalFieldSchema(null, null, DataType.BYTEARRAY));
          new EqualExpression(DAfilterPlan, fx, fc0);
         
          DA.neverUseForRealSetSchema(aschema);
          expected.add(DA);
          expected.connect(A, DA);
         
          // B = load
          LogicalSchema bschema = new LogicalSchema();
          bschema.addField(new LogicalSchema.LogicalFieldSchema(
              "a", null, DataType.BYTEARRAY));
          bschema.addField(new LogicalSchema.LogicalFieldSchema(
              "b", null, DataType.BYTEARRAY));
          LOLoad B = new LOLoad(new FileSpec("morebla", new FuncSpec("PigStorage", "\t")), bschema, expected, null);
          expected.add(B);
         
          // DB = filter
          LogicalExpressionPlan DBfilterPlan = new LogicalExpressionPlan();
            LOFilter DB = new LOFilter(expected, DBfilterPlan);
          ProjectExpression fb = new ProjectExpression(DBfilterPlan, 0, 1, DB);
          fb.neverUseForRealSetFieldSchema(new LogicalFieldSchema(null, null, DataType.BYTEARRAY));
          ConstantExpression fc1 = new ConstantExpression(DBfilterPlan, new Integer(1), new LogicalFieldSchema(null, null, DataType.BYTEARRAY));
          new EqualExpression(DBfilterPlan, fb, fc1);

          DB.neverUseForRealSetSchema(bschema);
          expected.add(DB);
          expected.connect(B, DB);
         
          // C = join
          LogicalSchema cschema = new LogicalSchema();
          cschema.addField(new LogicalSchema.LogicalFieldSchema(
              "D::x", null, DataType.BYTEARRAY));
          cschema.addField(new LogicalSchema.LogicalFieldSchema(
              "D::y", null, DataType.BYTEARRAY));
          cschema.addField(new LogicalSchema.LogicalFieldSchema(
              "null::a", null, DataType.BYTEARRAY));
          cschema.addField(new LogicalSchema.LogicalFieldSchema(
              "null::b", null, DataType.BYTEARRAY));
          cschema.getField(0).uid = 1;
          cschema.getField(1).uid = 2;
          cschema.getField(2).uid = 3;
          cschema.getField(3).uid = 4;
          LogicalExpressionPlan aprojplan = new LogicalExpressionPlan();
            MultiMap<Integer, LogicalExpressionPlan> mm =
                new MultiMap<Integer, LogicalExpressionPlan>();
            LOJoin C = new LOJoin(expected, mm, JOINTYPE.HASH, new boolean[] {true, true});

          ProjectExpression x = new ProjectExpression(aprojplan, 0, 0, C);
          x.neverUseForRealSetFieldSchema(new LogicalFieldSchema(null, null, DataType.BYTEARRAY));
          LogicalExpressionPlan bprojplan = new LogicalExpressionPlan();
          ProjectExpression y = new ProjectExpression(bprojplan, 1, 0, C);
          y.neverUseForRealSetFieldSchema(new LogicalFieldSchema(null, null, DataType.BYTEARRAY));
          mm.put(0, aprojplan);
          mm.put(1, bprojplan);
          C.neverUseForRealSetSchema(cschema);
          expected.add(C);
          expected.connect(DA, C);
          expected.connect(DB, C);
         
          // D = filter
          LogicalExpressionPlan filterPlan = new LogicalExpressionPlan();
            LOFilter D = new LOFilter(expected, filterPlan);
          ProjectExpression fanotherx = new ProjectExpression(filterPlan, 0, 0, D);
          fanotherx.neverUseForRealSetFieldSchema(new LogicalFieldSchema(null, null, DataType.BYTEARRAY));
          ProjectExpression fa = new ProjectExpression(filterPlan, 0, 2, D);
          fa.neverUseForRealSetFieldSchema(new LogicalFieldSchema(null, null, DataType.BYTEARRAY));
          EqualExpression eq2 = new EqualExpression(filterPlan, fanotherx, fa);
          ProjectExpression fanotherb = new ProjectExpression(filterPlan, 0, 3, D);
          fanotherb.neverUseForRealSetFieldSchema(new LogicalFieldSchema(null, null, DataType.BYTEARRAY));
          ProjectExpression fy = new ProjectExpression(filterPlan, 0, 1, D);
          fy.neverUseForRealSetFieldSchema(new LogicalFieldSchema(null, null, DataType.BYTEARRAY));
          EqualExpression eq4 = new EqualExpression(filterPlan, fy, fanotherb);
          new AndExpression(filterPlan, eq2, eq4);
         
          D.neverUseForRealSetSchema(cschema);
          expected.add(D);
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                Iterator<Operator> iter = filterPlan.getOperators();           
                Operator op = null;
                while( iter.hasNext() ) {
                    op = iter.next();
                    if( op instanceof ProjectExpression ) {
                        ProjectExpression proj = (ProjectExpression)op;
                        if( proj.isProjectStar() ) {
                            LogicalRelationalOperator pred = (LogicalRelationalOperator)filter.getPlan().getPredecessors(filter).get(0);
                            LogicalSchema predSchema = pred.getSchema();
                            if (predSchema!=null) {
                                for (int i=0;i<predSchema.size();i++) {
                                    uids.add(predSchema.getField(i).uid);
                                    types.add(predSchema.getField(i).type);
                                }
                            }
                        } else {
                            uids.add(proj.getFieldSchema().uid);
                            types.add(proj.getFieldSchema().type);
                        }
                    }
                }
               
            }
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Related Classes of org.apache.pig.newplan.logical.expression.ProjectExpression

  • org.apache.pig.newplan.FilterExtractor
  • org.apache.pig.newplan.logical.DotLOPrinter
  • org.apache.pig.newplan.logical.ForeachInnerPlanVisitor
  • org.apache.pig.newplan.logical.LogicalExpPlanMigrationVistor
  • org.apache.pig.newplan.logical.relational.LogicalPlan
  • org.apache.pig.newplan.logical.relational.LogicalRelationalOperator
  • org.apache.pig.newplan.logical.relational.LogicalSchema
  • org.apache.pig.newplan.logical.relational.LogicalSchema.LogicalFieldSchema
  • org.apache.pig.newplan.logical.relational.LogToPhyTranslationVisitor
  • org.apache.pig.newplan.logical.relational.LOInnerLoad
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