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

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

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        LogicalExpressionPlan filterPlan = new LogicalExpressionPlan();
        LOFilter D = new LOFilter(lp, filterPlan);
        ProjectExpression fy = new ProjectExpression(filterPlan, 0, 1, D);
        fy.neverUseForRealSetFieldSchema(new LogicalFieldSchema(null, null,
                DataType.INTEGER, 2));
        ConstantExpression fc = new ConstantExpression(filterPlan, new Integer(0), new LogicalFieldSchema(null, null, DataType.INTEGER));
        new EqualExpression(filterPlan, fy, fc);
       
        D.neverUseForRealSetSchema(cschema);
        // Connect D to B, since the transform has happened.
        lp.add(D);
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        for (Operator suc : sucs) {
          // position is remembered in order to maintain the order of the successors
          Pair<Integer, Integer> pos = currentPlan.disconnect(op, suc);
          LogicalExpressionPlan filterPlan = new LogicalExpressionPlan();
          LogicalSchema.LogicalFieldSchema fs = new LogicalSchema.LogicalFieldSchema(null, null, DataType.BOOLEAN);
          new ConstantExpression(filterPlan, Boolean.valueOf(true), fs);
          LOSplitOutput splitOutput = new LOSplitOutput((LogicalPlan) currentPlan, filterPlan);
          splitOutput.setAlias(splitOp.getAlias());
          currentPlan.add(splitOutput);
          currentPlan.connect(splitOp, splitOutput);
          currentPlan.connect(splitOutput, pos.first, suc, pos.second);
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    String buildSampleOp(SourceLocation loc, String alias, String inputAlias, double value,
            SourceLocation valLoc) {
        LogicalExpressionPlan filterPlan = new LogicalExpressionPlan();
        //  Generate a filter condition.
        LogicalExpression konst = new ConstantExpression( filterPlan, value);
        konst.setLocation( valLoc );
        UserFuncExpression udf = new UserFuncExpression( filterPlan, new FuncSpec( RANDOM.class.getName() ) );
        new LessThanEqualExpression( filterPlan, udf, konst );
        LOFilter filter = new LOFilter( plan );
        return buildFilterOp( loc, filter, alias, inputAlias, filterPlan );
    }
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            SourceLocation valLoc)
                    throws ParserValidationException {

        LogicalExpressionPlan filterPlan = new LogicalExpressionPlan();
        //  Generate a filter condition.
        LogicalExpression konst = new ConstantExpression( filterPlan, value);
        konst.setLocation( valLoc );
        UserFuncExpression udf = new UserFuncExpression( filterPlan, new FuncSpec( RANDOM.class.getName() ) );
        new LessThanExpression( filterPlan, udf, konst );
        LOFilter filter = new LOFilter( plan, true );
        return buildFilterOp( loc, filter, alias, inputAlias, filterPlan );
    }
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            LogicalExpressionPlan exprPlan)
            throws ParserValidationException {
        try {
            filterOp.setAlias(inputAlias);
            List<LogicalExpression> args = new ArrayList<LogicalExpression>();
            ConstantExpression lhs = new ConstantExpression(exprPlan, new Boolean(true));
            ConstantExpression rhs = new ConstantExpression(exprPlan, new Boolean(false));
            BinCondExpression binCond = new BinCondExpression(exprPlan, expr, lhs, rhs);
            args.add(binCond);
            ConstantExpression constExpr = new ConstantExpression(exprPlan, comment);
            args.add(constExpr);
            UserFuncExpression udf = new UserFuncExpression(exprPlan, new FuncSpec( Assert.class.getName() ), args );
            exprPlan.add(udf);
            filterOp.setFilterPlan(exprPlan);
            // pass the inputAlias to alias
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        // build an expression with no AND
        LogicalExpressionPlan p3 = new LogicalExpressionPlan();
        LogicalRelationalOperator f1 = new LOFilter(plan, p3);
       
        LogicalExpression lp3 = new ProjectExpression(p3, 0, 2, f1);
        LogicalExpression cont = new ConstantExpression(p3, new Integer(3));
        p3.add(lp3);
        p3.add(cont);      
        LogicalExpression eq = new EqualExpression(p3, lp3, cont);       
       
       
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    public void testFilterRuleWithAnd() throws Exception  {
        prep();
       
        LogicalExpressionPlan p4 = new LogicalExpressionPlan();       
        LogicalExpression lp3 = new ProjectExpression(p4, 0, 2, filter);
        LogicalExpression cont = new ConstantExpression(p4, new Integer(3));
        p4.add(lp3);
        p4.add(cont);
        LogicalExpression eq = new EqualExpression(p4, lp3, cont);
     
        LogicalExpression lp4 = new ProjectExpression(p4, 0, 5, filter);
        LogicalExpression cont2 = new ConstantExpression(p4, new Float(100));
        p4.add(lp4);
        p4.add(cont2);
        LogicalExpression eq2 = new EqualExpression(p4, lp4, cont2);       
   
        LogicalExpression and = new AndExpression(p4, eq, eq2);       
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        // build an expression with 2 AND, it should split into 3 filters
        LogicalExpressionPlan p5 = new LogicalExpressionPlan();
       
      
        LogicalExpression lp3 = new ProjectExpression(p5, 0, 2, filter);
        LogicalExpression cont = new ConstantExpression(p5, new Integer(3));
        p5.add(lp3);
        p5.add(cont);      
        LogicalExpression eq = new EqualExpression(p5, lp3, cont);
       
        LogicalExpression lp4 = new ProjectExpression(p5, 0, 3, filter);
        LogicalExpression cont2 = new ConstantExpression(p5, new Integer(3));       
        p5.add(lp4);
        p5.add(cont2);
        LogicalExpression eq2 = new EqualExpression(p5, lp4, cont2);       
       
        LogicalExpression and1 = new AndExpression(p5, eq, eq2);
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        prep();
        // build an expression with 2 AND, it should split into 3 filters
        LogicalExpressionPlan p5 = new LogicalExpressionPlan();
       
        LogicalExpression lp3 = new ProjectExpression(p5, 0, 2, filter);
        LogicalExpression cont = new ConstantExpression(p5, new Integer(3));
        p5.add(lp3);
        p5.add(cont);
        LogicalExpression eq = new EqualExpression(p5, lp3, cont);     
       
        lp3 = new ProjectExpression(p5, 0, 0, filter);
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    private static String getTestExpression(LogicalExpression op) throws FrontendException {
        if(op == null) {
            return null;
        }
        if(op instanceof ConstantExpression) {
            ConstantExpression constExpr =(ConstantExpression)op ;
            return String.valueOf(constExpr.getValue());
        } else if (op instanceof ProjectExpression) {
            ProjectExpression projExpr = (ProjectExpression)op;
            String fieldName = projExpr.getFieldSchema().alias;
            return fieldName;
        } else {
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Related Classes of org.apache.pig.newplan.logical.expression.ConstantExpression

  • org.apache.pig.newplan.FilterExtractor
  • org.apache.pig.newplan.logical.LogicalExpPlanMigrationVistor
  • org.apache.pig.newplan.logical.rules.ConstantCalculator$ConstantCalculatorTransformer$ConstantCalculatorExpressionVisitor
  • org.apache.pig.newplan.logical.rules.ConstExpEvaluator
  • org.apache.pig.newplan.logical.rules.ImplicitSplitInserter$ImplicitSplitInserterTransformer
  • org.apache.pig.newplan.logical.visitor.ImplicitSplitInsertVisitor
  • org.apache.pig.newplan.logical.visitor.LineageFindRelVisitor$LineageFindExpVisitor
  • org.apache.pig.newplan.logical.visitor.ScalarVisitor
  • org.apache.pig.newplan.logical.visitor.UnionOnSchemaSetter
  • org.apache.pig.newplan.PColFilterExtractor
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