Examples of RelNode

org.eigenbase.rel.RelNode
A RelNode is a relational expression.
A relational expression is not a scalar expression; see {@link org.eigenbase.sql.SqlNode} and {@link RexNode}.

If this type of relational expression has some particular planner rules, it should implement the public static method {@link AbstractRelNode#register}.

When a relational expression comes to be implemented, the system allocates a {@link org.eigenbase.relopt.RelImplementor} to manage the process. Everyimplementable relational expression has a {@link RelTraitSet} describing itsphysical attributes. The RelTraitSet always contains a {@link Convention}describing how the expression passes data to its consuming relational expression, but may contain other traits, including some applied externally. Because traits can be applied externally, implementations of RelNode should never assume the size or contents of their trait set (beyond those traits configured by the RelNode itself).

For each calling-convention, there is a corresponding sub-interface of RelNode. For example, {@code net.hydromatic.optiq.rules.java.EnumerableRel}has operations to manage the conversion to a graph of {@code net.hydromatic.optiq.rules.java.EnumerableConvention}calling-convention, and it interacts with a {@code EnumerableRelImplementor}.

A relational expression is only required to implement its calling-convention's interface when it is actually implemented, that is, converted into a plan/program. This means that relational expressions which cannot be implemented, such as converters, are not required to implement their convention's interface.

Every relational expression must derive from {@link AbstractRelNode}. (Why have the RelNode interface, then? We need a root interface, because an interface can only derive from an interface.)

Examples of org.eigenbase.rel.RelNode

  protected RelNode convertToRel(SqlNode node) throws RelConversionException {
    return planner.convert(node);
  }


  protected DrillRel convertToDrel(RelNode relNode) throws RelConversionException {
    RelNode convertedRelNode = planner.transform(DrillSqlWorker.LOGICAL_RULES,
        relNode.getTraitSet().plus(DrillRel.DRILL_LOGICAL), relNode);
    if (convertedRelNode instanceof DrillStoreRel) {
      throw new UnsupportedOperationException();
    } else {
      return new DrillScreenRel(convertedRelNode.getCluster(), convertedRelNode.getTraitSet(), convertedRelNode);
    }
  }

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Examples of org.eigenbase.rel.RelNode

  @Override
  public RelOptCost computeSelfCost(RelOptPlanner planner) {
    if (PrelUtil.getSettings(getCluster()).useDefaultCosting()) {
      return super.computeSelfCost(planner).multiplyBy(.1);
    }
    RelNode child = this.getChild();
    double inputRows = RelMetadataQuery.getRowCount(child);


    int  rowWidth = child.getRowType().getFieldCount() * DrillCostBase.AVG_FIELD_WIDTH;


    double rangePartitionCpuCost = DrillCostBase.RANGE_PARTITION_CPU_COST * inputRows;
    double svrCpuCost = DrillCostBase.SVR_CPU_COST * inputRows;
    double networkCost = DrillCostBase.BYTE_NETWORK_COST * inputRows * rowWidth;
    DrillCostFactory costFactory = (DrillCostFactory)planner.getCostFactory();

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Examples of org.eigenbase.rel.RelNode


  @Override
  public PhysicalPlan getPlan(SqlNode node) throws ValidationException, RelConversionException, IOException {
    SqlNode sqlNode = rewrite(node);
    SqlNode validated = validateNode(sqlNode);
    RelNode rel = convertToRel(validated);
    DrillRel drel = convertToDrel(rel);
    log("Optiq Logical", rel);
    log("Drill Logical", drel);


    if(mode == ResultMode.LOGICAL){

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Examples of org.eigenbase.rel.RelNode

    } else if (physicalJoinType == PhysicalJoinType.HASH_JOIN) {
      traitsLeft = left.getTraitSet().plus(Prel.DRILL_PHYSICAL).plus(hashLeftPartition);
      traitsRight = right.getTraitSet().plus(Prel.DRILL_PHYSICAL).plus(hashRightPartition);
    }


    final RelNode convertedLeft = convert(left, traitsLeft);
    final RelNode convertedRight = convert(right, traitsRight);


    DrillJoinRelBase newJoin = null;


    if (physicalJoinType == PhysicalJoinType.HASH_JOIN) {
      newJoin = new HashJoinPrel(join.getCluster(), traitsLeft,

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Examples of org.eigenbase.rel.RelNode

    } else {
      traitsRight = right.getTraitSet().plus(Prel.DRILL_PHYSICAL).plus(distBroadcastRight);
    }


    final RelTraitSet traitsLeft = left.getTraitSet().plus(Prel.DRILL_PHYSICAL);
    final RelNode convertedLeft = convert(left, traitsLeft);
    final RelNode convertedRight = convert(right, traitsRight);


    new SubsetTransformer<DrillJoinRel, InvalidRelException>(call){


      public RelNode convertChild(final DrillJoinRel join, final RelNode rel) throws InvalidRelException {
        DrillDistributionTrait toDist = rel.getTraitSet().getTrait(DrillDistributionTraitDef.INSTANCE);
        RelTraitSet newTraitsLeft;
        if (physicalJoinType == PhysicalJoinType.MERGE_JOIN) {
          newTraitsLeft = newTraitSet(Prel.DRILL_PHYSICAL, collationLeft, toDist);
        } else {
          newTraitsLeft = newTraitSet(Prel.DRILL_PHYSICAL, toDist);
        }
        Character.digit(1, 1);
        RelNode newLeft = convert(left, newTraitsLeft);
        if (physicalJoinType == PhysicalJoinType.HASH_JOIN) {
          return new HashJoinPrel(join.getCluster(), traitsLeft, newLeft, convertedRight, join.getCondition(),
                                     join.getJoinType());
        } else if (physicalJoinType == PhysicalJoinType.MERGE_JOIN) {
          return new MergeJoinPrel(join.getCluster(), traitsLeft, newLeft, convertedRight, join.getCondition(),

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Examples of org.eigenbase.rel.RelNode

  public RelOptCost computeSelfCost(RelOptPlanner planner) {
    if(PrelUtil.getSettings(getCluster()).useDefaultCosting()) {
      return super.computeSelfCost(planner).multiplyBy(.1);
    }


    RelNode child = this.getChild();
    double inputRows = RelMetadataQuery.getRowCount(child);
    int  rowWidth = child.getRowType().getFieldCount() * DrillCostBase.AVG_FIELD_WIDTH;
    double svrCpuCost = DrillCostBase.SVR_CPU_COST * inputRows;
    double networkCost = DrillCostBase.BYTE_NETWORK_COST * inputRows * rowWidth;
    DrillCostFactory costFactory = (DrillCostFactory)planner.getCostFactory();
    return costFactory.makeCost(inputRows, svrCpuCost, 0, networkCost);
  }

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Examples of org.eigenbase.rel.RelNode

  }


  @Override
  public void onMatch(RelOptRuleCall call) {
    final DrillWriterRelBase writer = call.rel(0);
    final RelNode input = call.rel(1);


    final RelTraitSet traits = input.getTraitSet().plus(Prel.DRILL_PHYSICAL);
    final RelNode convertedInput = convert(input, traits);


    if (!new WriteTraitPull(call).go(writer, convertedInput)) {
      DrillWriterRelBase newWriter = new WriterPrel(writer.getCluster(), convertedInput.getTraitSet(),
          convertedInput, writer.getCreateTableEntry());


      call.transformTo(newWriter);
    }
  }

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Examples of org.eigenbase.rel.RelNode

  // Create 2 phase aggr plan for aggregates such as SUM, MIN, MAX
  // If any of the aggregate functions are not one of these, then we
  // currently won't generate a 2 phase plan.
  protected boolean create2PhasePlan(RelOptRuleCall call, DrillAggregateRel aggregate) {
    PlannerSettings settings = PrelUtil.getPlannerSettings(call.getPlanner());
    RelNode child = call.rel(0).getInputs().get(0);
    boolean smallInput = child.getRows() < settings.getSliceTarget();
    if (! settings.isMultiPhaseAggEnabled() || settings.isSingleMode() || smallInput) {
      return false;
    }


    for (AggregateCall aggCall : aggregate.getAggCallList()) {

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Examples of org.eigenbase.rel.RelNode

  @Override
  public void onMatch(RelOptRuleCall call) {


    final SortRel sort = call.rel(0);


    final RelNode input = sort.getChild();
    final RelTraitSet traits = sort.getTraitSet().plus(DrillRel.DRILL_LOGICAL);


    final RelNode convertedInput = convert(input, input.getTraitSet().plus(DrillRel.DRILL_LOGICAL));
    call.transformTo(new DrillSortRel(sort.getCluster(), traits, convertedInput, sort.getCollation()));
  }

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Examples of org.eigenbase.rel.RelNode

  }


  @Override
  public void onMatch(RelOptRuleCall call) {
    final FilterRel filter = (FilterRel) call.rel(0);
    final RelNode input = filter.getChild();
    //final RelTraitSet traits = filter.getTraitSet().plus(DrillRel.DRILL_LOGICAL);
    final RelNode convertedInput = convert(input, input.getTraitSet().plus(DrillRel.DRILL_LOGICAL));
    call.transformTo(new DrillFilterRel(filter.getCluster(), convertedInput.getTraitSet(), convertedInput, filter.getCondition()));
  }

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