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

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

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

org.apache.pig.newplan.logical.expression.DereferenceExpression
This is a special case Expression and violates some of the rules of an Expression. Violation: It has multiple Uids ( though not tracked there can be multiple uids for this expression ) This is a special operator which handles the case described below Tuple( a:int, b:bag{ b_a:int, b_b:float } ) --> BagDereference ( 0 ) --> project( 0, 1 ) --> bag{ b_a:float } i.e. First input ( 0 ), second column ( 1 ) and first column of the bag.

        LogicalExpression pe;
        if (project.getPlan().getPredecessors(project)!=null && project.getPlan().getPredecessors(project).get(0)
                instanceof LOProject) {
            List<Integer> columnNums = new ArrayList<Integer>();
            columnNums.add(col);
            pe = new DereferenceExpression(exprPlan, columnNums);
        }
        else {
            LogicalOperator lg = project.getExpression();
            int input;
            if (oldAttachedRelationalOp instanceof LOSplitOutput) {

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        else if( op instanceof LOProject ) {
            LogicalExpression expOper = exprOpsMap.get(op);
            
            if (expOper!=null) {
                // Add the dereference in the plan
                DereferenceExpression dereferenceExp = new DereferenceExpression(
                        exprPlan, project.getProjection());
                exprOpsMap.put(project, dereferenceExp);
                exprPlan.add(dereferenceExp);
                exprPlan.connect(dereferenceExp, expOper);
            }

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        else if( op instanceof ExpressionOperator ) {
            LogicalExpression expOper = exprOpsMap.get(op);
            
            if (expOper!=null) {
                // Add the dereference in the plan
                DereferenceExpression dereferenceExp = new DereferenceExpression(
                        exprPlan, project.getProjection());
                exprOpsMap.put(project, dereferenceExp);
                exprPlan.add(dereferenceExp);
                exprPlan.connect(dereferenceExp, expOper);
            }

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            List<Integer> projections1 = new ArrayList<Integer>();
            projections1.add(1);
            projections1.add(2);
            //ProjectExpression project12 = new ProjectExpression(innerPlan1, project11, projections1);
            //project12.setSentinel(false);
            DereferenceExpression project12 = new DereferenceExpression(innerPlan1, projections1);
           // innerPlan1.connect(project11, project12);
            innerPlan1.connect(project12, project11);


            // Create expression inner plan #1 of input #2
            LogicalExpressionPlan innerPlan2 = new LogicalExpressionPlan();

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            List<Integer> projections1 = new ArrayList<Integer>() ;
            projections1.add(1) ;
            projections1.add(2) ;
            //ProjectExpression project12 = new ProjectExpression(innerPlan1, project11, projections1) ;
            //project12.setSentinel(false);
            DereferenceExpression project12 = new DereferenceExpression(innerPlan1, projections1);
           // innerPlan1.connect(project11, project12);
            innerPlan1.connect(project12, project11);
            
            // Create expression inner plan #1 of input #2
            LogicalExpressionPlan innerPlan2 = new LogicalExpressionPlan() ;

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            List<Integer> projections1 = new ArrayList<Integer>();
            projections1.add(1);
            projections1.add(2);
            //ProjectExpression project12 = new ProjectExpression(innerPlan1, project11, projections1);
            //project12.setSentinel(false);
            DereferenceExpression project12 = new DereferenceExpression(innerPlan1, projections1);
           // innerPlan1.connect(project11, project12);
            innerPlan1.connect(project12, project11);


            // Create expression inner plan #1 of input #2
            LogicalExpressionPlan innerPlan2 = new LogicalExpressionPlan();

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            List<Integer> projections1 = new ArrayList<Integer>();
            projections1.add(1);
            projections1.add(2);
            //ProjectExpression project12 = new ProjectExpression(innerPlan1, project11, projections1);
            //project12.setSentinel(false);
            DereferenceExpression project12 = new DereferenceExpression(innerPlan1, projections1);
           // innerPlan1.connect(project11, project12);
            innerPlan1.connect(project12, project11);


            // Create expression inner plan #1 of input #2
            LogicalExpressionPlan innerPlan2 = new LogicalExpressionPlan();

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            List<Integer> projections1 = new ArrayList<Integer>() ;
            projections1.add(1) ;
            projections1.add(2) ;
            //ProjectExpression project12 = new ProjectExpression(innerPlan1, project11, projections1) ;
            //project12.setSentinel(false);
            DereferenceExpression project12 = new DereferenceExpression(innerPlan1, projections1);
           // innerPlan1.connect(project11, project12);
            innerPlan1.connect(project12, project11);
            
            // Create expression inner plan #1 of input #2
            LogicalExpressionPlan innerPlan2 = new LogicalExpressionPlan() ;

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            List<Integer> projections1 = new ArrayList<Integer>() ;
            projections1.add(1) ;
            projections1.add(2) ;
            //ProjectExpression project12 = new ProjectExpression(innerPlan1, project11, projections1) ;
            //project12.setSentinel(false);
            DereferenceExpression project12 = new DereferenceExpression(innerPlan1, projections1);
           // innerPlan1.connect(project11, project12);
            innerPlan1.connect(project12, project11);
            
            // Create expression inner plan #1 of input #2
            LogicalExpressionPlan innerPlan2 = new LogicalExpressionPlan() ;

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Related Classes of org.apache.pig.newplan.logical.expression.DereferenceExpression

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org.apache.pig.newplan.logical.LogicalExpPlanMigrationVistor

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

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

org.apache.pig.parser.SourceLocation

org.apache.pig.test.TestTypeCheckingValidatorNewLP

org.apache.pig.impl.logicalLayer.FrontendException

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