Examples of org.eigenbase.rel.rules.PushProjector.convertProject()

org.eigenbase.rel.rules.PushProjector.convertProject()

Decomposes a projection to the input references referenced by a projection and a filter, either of which is optional. If both are provided, the filter is underneath the project.

Creates a projection containing all input references as well as preserving any special expressions. Converts the original projection and/or filter to reference the new projection. Then, finally puts on top, a final projection corresponding to the original projection. @param defaultExpr expression to be used in the projection if no fieldsor special columns are selected @return the converted projection if it makes sense to push elements ofthe projection; otherwise returns null

      // windowed aggregate.
      return;
    }


    PushProjector pushProjector = createPushProjector(origProj, origFilter, rel, preserveExprCondition);
    RelNode topProject = pushProjector.convertProject(null);


    if (topProject != null) {
      call.transformTo(topProject);
    }
  }

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