Package org.apache.tajo.engine.eval

Examples of org.apache.tajo.engine.eval.ConstEval

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              matched = true;
              break;
            }
          }
          if (!matched) {
            targets[i] = new Target(new ConstEval(NullDatum.get()), column.getColumnName());
          }
          matched = false;
        }

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    evals = new EvalNode[plan.getTargets().length];
    evalContexts = new EvalContext[plan.getTargets().length];
    for (int i = 0; i < plan.getTargets().length; i++) {
      Target t = plan.getTargets()[i];
      if (t.getEvalTree().getType() == EvalType.FIELD && !nonNullGroupingFields.contains(t.getColumnSchema())) {
        evals[i] = new ConstEval(DatumFactory.createNullDatum());
        evalContexts[i] = evals[i].newContext();
      } else {
        evals[i] = t.getEvalTree();
        evalContexts[i] = evals[i].newContext();
      }
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    // Targets or search conditions may contain column references.
    // However, actual values absent in tuples. So, Replace all column references by constant datum.
    for (Column column : columnPartitionSchema.toArray()) {
      FieldEval targetExpr = new FieldEval(column);
      Datum datum = targetExpr.eval(columnPartitionSchema, partitionRow);
      ConstEval constExpr = new ConstEval(datum);

      for (Target target : plan.getTargets()) {
        if (target.getEvalTree().equals(targetExpr)) {
          if (!target.hasAlias()) {
            target.setAlias(target.getEvalTree().getName());
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Related Classes of org.apache.tajo.engine.eval.ConstEval

  • org.apache.tajo.engine.planner.physical.AggregationExec
  • org.apache.tajo.engine.planner.physical.SeqScanExec
  • org.apache.tajo.master.GlobalEngine$InsertHook
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