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

Examples of org.apache.pig.newplan.logical.relational.LogicalSchema.LogicalFieldSchema

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     * @param exprPlan ExpressionPlan which generates this field
     * @return
     */
    private LogicalFieldSchema getPlanSchema( LogicalExpressionPlan exprPlan ) throws FrontendException {
        LogicalExpression sourceExp = (LogicalExpression) exprPlan.getSources().get(0);
        LogicalFieldSchema planSchema = null;
        planSchema = sourceExp.getFieldSchema().deepCopy();
        planSchema.uid = -1;
        return planSchema;
    }
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                hasMultipleKeys = true;
                break;
            }
        }

        LogicalFieldSchema groupKeySchema = null;
        // Generate the groupField Schema
        if( hasMultipleKeys ) {
            LogicalSchema keySchema = new LogicalSchema();
            // We sort here to maintain the correct order of inputs
            for( Integer key : mExpressionPlans.keySet()) {
                Collection<LogicalExpressionPlan> plans =
                    mExpressionPlans.get(key);

                for( LogicalExpressionPlan plan : plans ) {
                    LogicalFieldSchema fieldSchema = getPlanSchema(plan);
                    // if any plan schema is null, that means we can't calculate
                    // further schemas so we bail out
                    if( fieldSchema == null ) {
                        schema = null;
                        return schema;
                    }
                    fieldSchema = new LogicalFieldSchema(fieldSchema);
                    keySchema.addField(fieldSchema);
                }
                // We only need fields from one input and not all
                break;
            }
            groupKeySchema = new LogicalFieldSchema(GROUP_COL_NAME, keySchema, DataType.TUPLE);
        } else {
            // We sort here to maintain the correct order of inputs
            for( Integer key : mExpressionPlans.keySet() ) {
                Collection<LogicalExpressionPlan> plans = mExpressionPlans.get(key);
                for( LogicalExpressionPlan plan : plans ) {
                    groupKeySchema = getPlanSchema(plan);
                    // if any plan schema is null, that means we can't calculate
                    // further schemas so we bail out
                    if( groupKeySchema == null ) {
                        schema = null;
                        return schema;
                    }
                    groupKeySchema = new LogicalSchema.LogicalFieldSchema(groupKeySchema);
                    // Change the uid of this field
                    groupKeySchema.alias = GROUP_COL_NAME;
                    break;
                }
                break;
            }
        }
       
        if (groupKeySchema==null) {
            throw new FrontendException("Cannot get group key schema for " + this, 2234);
        }
        groupKeyUidOnlySchema = groupKeySchema.mergeUid(groupKeyUidOnlySchema);

        fieldSchemaList.add( groupKeySchema );

        // Generate the Bag Schema
        int counter = 0;
        for (Operator op : inputs) {
            LogicalSchema inputSchema = ((LogicalRelationalOperator)op).getSchema();
          
            // Check if we already have calculated Uid for this bag for given
            // input operator
            long bagUid;
            if (generatedInputUids.get(counter)!=null)
                bagUid = generatedInputUids.get(counter);
            else {
                bagUid = LogicalExpression.getNextUid();
                generatedInputUids.put( counter, bagUid );
            }
           
            LogicalFieldSchema newBagSchema = new LogicalFieldSchema(
                    ((LogicalRelationalOperator)op).getAlias(), inputSchema,
                    DataType.BAG, bagUid);

            fieldSchemaList.add( newBagSchema );
            counter ++;
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        if (prj.findReferent().getSchema()!=null) {
            if (prj.getFieldSchema()!=null) {
                if (prj.getFieldSchema().type==DataType.BAG && prj.getFieldSchema().schema!=null &&
                        prj.getFieldSchema().schema.isTwoLevelAccessRequired()) {
                    schema = new LogicalSchema();
                    LogicalFieldSchema tupleSchema = prj.getFieldSchema().schema.getField(0);
                    for (int i=0;i<tupleSchema.schema.size();i++)
                        schema.addField(tupleSchema.schema.getField(i));
                    sourceIsBag = true;
                    alias = prj.getFieldSchema().alias;
                }
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                for (LogicalSchema.LogicalFieldSchema fs : mUserDefinedSchema.get(i).getFields()) {
                    mUserDefinedSchemaCopy.addField(fs.deepCopy());
                }
            }
           
            LogicalFieldSchema fieldSchema = null;
           
            LogicalSchema expSchema = null;
           
            if (exp.getFieldSchema()!=null) {
           
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                determinedSchema = ((LOLoad)op).getDeterminedSchema();
            }
            else {
                determinedSchema = new LogicalSchema();
                for (int i=0;i<s.size();i++) {
                    determinedSchema.addField(new LogicalFieldSchema(null, null, DataType.BYTEARRAY));
                }
            }
            for (int i = 0; i < s.size(); i++) {
                LogicalSchema.LogicalFieldSchema fs = s.getField(i);
               
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            if(args != null && args.size() > 0 ){
                int pos = (Integer)((ConstantExpression)args.get(0)).getValue();
                LogicalRelationalOperator inp = (LogicalRelationalOperator)implicitReferencedOperator;

                if( inp.getSchema() != null){
                    LogicalFieldSchema inpFs = inp.getSchema().getField(pos);
                    fieldSchema = new LogicalFieldSchema(inpFs);
                    //  fieldSchema.alias = "ReadScalars_" + fieldSchema.alias;
                }else{
                    fieldSchema = new LogicalFieldSchema(null, null, DataType.BYTEARRAY);
                }
                return fieldSchema;
            }else{
                //predecessors haven't been setup, return null
                return null;
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    @Override
    public LogicalSchema.LogicalFieldSchema getFieldSchema() throws FrontendException {
        if (fieldSchema!=null)
            return fieldSchema;
        LogicalExpression successor = (LogicalExpression)plan.getSuccessors(this).get(0);
        LogicalFieldSchema predFS = successor.getFieldSchema();
        if (predFS!=null) {
            if (columns.size()>1 || predFS.type==DataType.BAG) {
                LogicalSchema innerSchema = null;
                if (predFS.schema!=null) {
                    innerSchema = new LogicalSchema();
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        @Override
        public void visit(LOLoad load) throws FrontendException {
            if( load.getSchema() != null ) {
                Map<Integer,Set<String>> annotation = new HashMap<Integer,Set<String>>();
                for( int i=0; i<load.getSchema().size(); i++) {
                    LogicalFieldSchema field = load.getSchema().getField(i);
                    if( inputUids.containsKey( field.uid ) ) {
                        annotation.put(i, inputUids.get( field.uid ) );
                    }
                }
                load.annotate(REQUIRED_MAPKEYS, annotation);
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                List<LOInnerLoad> innerLoads = LOForEach.findReacheableInnerLoadFromBoundaryProject(this);
               
                // pull tuple information from innerload
                if (innerLoads.get(0).getProjection().getFieldSchema().schema!=null &&
                        innerLoads.get(0).getProjection().getFieldSchema().schema.isTwoLevelAccessRequired()) {
                    LogicalFieldSchema originalTupleFieldSchema = innerLoads.get(0).getProjection().getFieldSchema().schema.getField(0);
                    LogicalFieldSchema newTupleFieldSchema = new LogicalFieldSchema(originalTupleFieldSchema.alias,
                            schema, DataType.TUPLE);
                    newTupleFieldSchema.uid = originalTupleFieldSchema.uid;
                    LogicalSchema newTupleSchema = new LogicalSchema();
                    newTupleSchema.setTwoLevelAccessRequired(true);
                    newTupleSchema.addField(newTupleFieldSchema);
                    fieldSchema = new LogicalSchema.LogicalFieldSchema(alias, newTupleSchema, DataType.BAG);
                }
                else {
                    fieldSchema = new LogicalSchema.LogicalFieldSchema(alias, schema, DataType.BAG);
                }
                fieldSchema.uid = innerLoads.get(0).getProjection().getFieldSchema().uid;
            }
            else {
                if (findReferent().getSchema()!=null)
                    fieldSchema = findReferent().getSchema().getField(0);
            }
            if (fieldSchema!=null)
                uidOnlyFieldSchema = fieldSchema.mergeUid(uidOnlyFieldSchema);
        }
        else {
            if (schema == null) {
                fieldSchema = new LogicalSchema.LogicalFieldSchema(null, null, DataType.BYTEARRAY);
                uidOnlyFieldSchema = fieldSchema.mergeUid(uidOnlyFieldSchema);
            }
            else {
                int index = -1;
                if (!isProjectStar() && uidOnlyFieldSchema!=null) {
                    long uid = uidOnlyFieldSchema.uid;
                    for (int i=0;i<schema.size();i++) {
                        LogicalFieldSchema fs = schema.getField(i);
                        if (fs.uid==uid) {
                            index = i;
                        }
                    }
                }
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          // 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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Related Classes of org.apache.pig.newplan.logical.relational.LogicalSchema.LogicalFieldSchema

  • org.apache.pig.newplan.logical.expression.BinCondExpression
  • org.apache.pig.newplan.logical.expression.DereferenceExpression
  • org.apache.pig.newplan.logical.expression.MapLookupExpression
  • org.apache.pig.newplan.logical.expression.ProjectExpression
  • org.apache.pig.newplan.logical.expression.ScalarExpression
  • org.apache.pig.newplan.logical.expression.UserFuncExpression
  • org.apache.pig.newplan.logical.relational.LOCogroup
  • org.apache.pig.newplan.logical.relational.LOGenerate
  • org.apache.pig.newplan.logical.relational.LOInnerLoad
  • org.apache.pig.newplan.logical.relational.LOUnion
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