Package org.apache.drill.exec.planner.physical

Examples of org.apache.drill.exec.planner.physical.Prel

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  @Override
  public Prel visitPrel(Prel prel, Set<Prel> data) throws RuntimeException {
    List<RelNode> children = Lists.newArrayList();
    boolean childrenChanged = false;
    for(Prel child : prel){
      Prel newChild = visitPrel(child, data);
      if(newChild != child) childrenChanged = true;
      children.add(newChild);
    }

    if(data.contains(prel) || childrenChanged){
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    return prel.accept(INSTANCE, null);
  }

  @Override
  public Prel visitScreen(ScreenPrel prel, Void value) throws RuntimeException {
    Prel newChild = ((Prel) prel.getChild()).accept(this, value);
    return prel.copy(prel.getTraitSet(), Collections.singletonList( (RelNode) addTrivialOrderedProjectPrel( newChild )));
  }
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    return new ProjectPrel(prel.getCluster(), prel.getTraitSet(), prel, projections, prel.getRowType());
  }

  @Override
  public Prel visitWriter(WriterPrel prel, Void value) throws RuntimeException {
    Prel newChild = ((Prel) prel.getChild()).accept(this, null);
    return prel.copy(prel.getTraitSet(), Collections.singletonList( (RelNode) addTrivialOrderedProjectPrel( newChild )));
  }
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  @Override
  public Prel visitPrel(Prel prel, Void value) throws RuntimeException {
    List<RelNode> children = Lists.newArrayList();
    boolean changed = false;
    for (Prel p : prel) {
      Prel newP = p.accept(this, null);
      if (newP != p) {
        changed = true;
      }
      children.add(newP);
    }
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  @Override
  public Prel visitPrel(Prel prel, Set<Prel> data) throws RuntimeException {
    List<RelNode> children = Lists.newArrayList();
    boolean childrenChanged = false;
    for (Prel child : prel) {
      Prel newChild = visitPrel(child, data);
      if (newChild != child) {
        childrenChanged = true;
      }
      children.add(newChild);
    }
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    for (Frag f : frags) {
      int id = 1;
      Queue<Prel> ops = Lists.newLinkedList();
      ops.add(f.root);
      while (!ops.isEmpty()) {
        Prel p = ops.remove();
        boolean isExchange = p instanceof ExchangePrel;

        if (p != f.root) {      // we account for exchanges as receviers to guarantee unique identifiers.
          ids.put(p, new OpId(f.majorFragmentId, id++) );
        }

        if (!isExchange || p == f.root) {
          List<Prel> children = Lists.reverse(Lists.newArrayList(p.iterator()));
          for (Prel child : children) {
            ops.add(child);
          }
        }
      }
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    renamedForStar[0] = false;
    renamedForStar[1] = false;

    //root should be screen / writer : no need to rename for the root.

    Prel child = ((Prel) root.getInput(0)).accept(INSTANCE, renamedForStar);

    if (renamedForStar[0] && renamedForStar[1]) {
      List<RexNode> exprs = Lists.newArrayList();
      for (int i = 0; i < origRowType.getFieldCount(); i++) {
        RexNode expr = child.getCluster().getRexBuilder().makeInputRef(origRowType.getFieldList().get(i).getType(), i);
        exprs.add(expr);
      }

      RelDataType newRowType = RexUtil.createStructType(child.getCluster().getTypeFactory(), exprs, origRowType.getFieldNames());

      // Insert a top project which allows duplicate columns.
      child = new ProjectAllowDupPrel(child.getCluster(), child.getTraitSet(), child, exprs, newRowType);

      List<RelNode> children = Lists.newArrayList();
      children.add( child);
      return (Prel) root.copy(root.getTraitSet(), children);
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  @Override
  public Prel visitExchange(ExchangePrel prel, MajorFragmentStat parent) throws RuntimeException {
    parent.add(prel);
    MajorFragmentStat newFrag = new MajorFragmentStat();
    Prel newChild = ((Prel) prel.getChild()).accept(this, newFrag);

    if (newFrag.isSingular() && parent.isSingular()) {
      return newChild;
    } else {
      return (Prel) prel.copy(prel.getTraitSet(), Collections.singletonList((RelNode) newChild));
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      i++;
      exprList.add(newExpr);
    }
    if (rewrite == true) {
      // TODO - figure out what is the right setting for the traits
      Prel newChild = ((Prel)project.getInput(0)).accept(this, null);
      ProjectPrel newProject = new ProjectPrel(node.getCluster(), project.getTraitSet(), newChild, exprList, new RelRecordType(relDataTypes));
      DrillFlattenPrel flatten = new DrillFlattenPrel(project.getCluster(), project.getTraitSet(), newProject, flatttenExpr);
      return flatten;
    }

    Prel child = ((Prel)project.getChild()).accept(this, null);
    return new ProjectPrel(node.getCluster(), project.getTraitSet(), child, exprList, new RelRecordType(relDataTypes));
  }
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      log("Optiq Logical", relQuery);

      // Convert the query to Drill Logical plan and insert a writer operator on top.
      DrillRel drel = convertToDrel(relQuery, drillSchema, newTblName);
      log("Drill Logical", drel);
      Prel prel = convertToPrel(drel);
      log("Drill Physical", prel);
      PhysicalOperator pop = convertToPop(prel);
      PhysicalPlan plan = convertToPlan(pop);
      log("Drill Plan", plan);
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Related Classes of org.apache.drill.exec.planner.physical.Prel

  • org.apache.drill.exec.planner.physical.explain.PrelSequencer
  • org.apache.drill.exec.planner.physical.visitor.ExcessiveExchangeIdentifier
  • org.apache.drill.exec.planner.physical.visitor.FinalColumnReorderer
  • org.apache.drill.exec.planner.physical.visitor.RelUniqifier
  • org.apache.drill.exec.planner.physical.visitor.RewriteProjectToFlatten
  • org.apache.drill.exec.planner.physical.visitor.StarColumnConverter
  • org.apache.drill.exec.planner.sql.handlers.CreateTableHandler
  • org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler
  • org.apache.drill.exec.planner.sql.handlers.ExplainHandler
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