Examples of RelFieldCollation

org.eigenbase.rel.RelFieldCollation
Definition of the ordering of one field of a {@link RelNode} whoseoutput is to be sorted. @see RelCollation

Examples of org.eigenbase.rel.RelFieldCollation


  public Pair<Expression, Expression> generateCollationKey(
      final List<RelFieldCollation> collations) {
    final Expression selector;
    if (collations.size() == 1) {
      RelFieldCollation collation = collations.get(0);
      ParameterExpression parameter =
          Expressions.parameter(javaRowClass, "v");
      selector =
          Expressions.lambda(
              Function1.class,
              fieldReference(parameter, collation.getFieldIndex()),
              parameter);
      return Pair.<Expression, Expression>of(
          selector,
          Expressions.call(
              BuiltinMethod.NULLS_COMPARATOR.method,
              Expressions.constant(
                  collation.nullDirection
                      == RelFieldCollation.NullDirection.FIRST),
              Expressions.constant(
                  collation.getDirection()
                      == RelFieldCollation.Direction.DESCENDING)));
    }
    selector =
        Expressions.call(BuiltinMethod.IDENTITY_SELECTOR.method);


    // int c;
    // c = Utilities.compare(v0, v1);
    // if (c != 0) return c; // or -c if descending
    // ...
    // return 0;
    BlockBuilder body = new BlockBuilder();
    final ParameterExpression parameterV0 =
        Expressions.parameter(javaRowClass, "v0");
    final ParameterExpression parameterV1 =
        Expressions.parameter(javaRowClass, "v1");
    final ParameterExpression parameterC =
        Expressions.parameter(int.class, "c");
    final int mod = collations.size() == 1 ? Modifier.FINAL : 0;
    body.add(Expressions.declare(mod, parameterC, null));
    for (RelFieldCollation collation : collations) {
      final int index = collation.getFieldIndex();
      Expression arg0 = fieldReference(parameterV0, index);
      Expression arg1 = fieldReference(parameterV1, index);
      switch (Primitive.flavor(fieldClass(index))) {
      case OBJECT:
        arg0 = Types.castIfNecessary(Comparable.class, arg0);
        arg1 = Types.castIfNecessary(Comparable.class, arg1);
      }
      final boolean nullsFirst =
          collation.nullDirection
              == RelFieldCollation.NullDirection.FIRST;
      final boolean descending =
          collation.getDirection()
              == RelFieldCollation.Direction.DESCENDING;
      body.add(
          Expressions.statement(
              Expressions.assign(
                  parameterC,

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Examples of org.eigenbase.rel.RelFieldCollation


  public Pair<Expression, Expression> generateCollationKey(
      final List<RelFieldCollation> collations) {
    final Expression selector;
    if (collations.size() == 1) {
      RelFieldCollation collation = collations.get(0);
      ParameterExpression parameter =
          Expressions.parameter(javaRowClass, "v");
      selector =
          Expressions.lambda(
              Function1.class,
              fieldReference(parameter, collation.getFieldIndex()),
              parameter);
      return Pair.<Expression, Expression>of(
          selector,
          Expressions.call(
              BuiltinMethod.NULLS_COMPARATOR.method,
              Expressions.constant(
                  collation.nullDirection
                      == RelFieldCollation.NullDirection.FIRST),
              Expressions.constant(
                  collation.getDirection()
                      == RelFieldCollation.Direction.DESCENDING)));
    }
    selector =
        Expressions.call(BuiltinMethod.IDENTITY_SELECTOR.method);


    // int c;
    // c = Utilities.compare(v0, v1);
    // if (c != 0) return c; // or -c if descending
    // ...
    // return 0;
    BlockBuilder body = new BlockBuilder();
    final ParameterExpression parameterV0 =
        Expressions.parameter(javaRowClass, "v0");
    final ParameterExpression parameterV1 =
        Expressions.parameter(javaRowClass, "v1");
    final ParameterExpression parameterC =
        Expressions.parameter(int.class, "c");
    final int mod = collations.size() == 1 ? Modifier.FINAL : 0;
    body.add(Expressions.declare(mod, parameterC, null));
    for (RelFieldCollation collation : collations) {
      final int index = collation.getFieldIndex();
      Expression arg0 = fieldReference(parameterV0, index);
      Expression arg1 = fieldReference(parameterV1, index);
      switch (Primitive.flavor(fieldClass(index))) {
      case OBJECT:
        arg0 = Types.castIfNecessary(Comparable.class, arg0);
        arg1 = Types.castIfNecessary(Comparable.class, arg1);
      }
      final boolean nullsFirst =
          collation.nullDirection
              == RelFieldCollation.NullDirection.FIRST;
      final boolean descending =
          collation.getDirection()
              == RelFieldCollation.Direction.DESCENDING;
      body.add(
          Expressions.statement(
              Expressions.assign(
                  parameterC,

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Examples of org.eigenbase.rel.RelFieldCollation

    List<RelFieldCollation> collations = Lists.newArrayList();
    
    for(Ordering o : order.getOrderings()){
      String fieldName = ExprHelper.getFieldName(o.getExpr());
      int fieldId = fieldMap.get(fieldName);
      RelFieldCollation c = new RelFieldCollation(fieldId, o.getDirection(), o.getNullDirection());
    }
    return new DrillSortRel(context.getCluster(), context.getLogicalTraits(), input, RelCollationImpl.of(collations));
  }

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Examples of org.eigenbase.rel.RelFieldCollation

  }
  
  private RelCollation getCollation(List<Integer> keys){    
    List<RelFieldCollation> fields = Lists.newArrayList();
    for (int key : keys) {
      fields.add(new RelFieldCollation(key));
    }
    return RelCollationImpl.of(fields);
  }

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Examples of org.eigenbase.rel.RelFieldCollation


  private RelCollation getCollation(DrillAggregateRel rel){


    List<RelFieldCollation> fields = Lists.newArrayList();
    for (int group : BitSets.toIter(rel.getGroupSet())) {
      fields.add(new RelFieldCollation(group));
    }
    return RelCollationImpl.of(fields);
  }

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Examples of org.eigenbase.rel.RelFieldCollation

  private RelCollation convertRelCollation(RelCollation src, Map<Integer, Integer> inToOut) {
    List<RelFieldCollation> newFields = Lists.newArrayList();


    for ( RelFieldCollation field : src.getFieldCollations()) {
      if (inToOut.containsKey(field.getFieldIndex())) {
        newFields.add(new RelFieldCollation(inToOut.get(field.getFieldIndex()), field.getDirection()));
      }
    }


    if (newFields.isEmpty()) {
      return RelCollationImpl.EMPTY;

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Examples of org.eigenbase.rel.RelFieldCollation

          if (obASTExpr.getType() == HiveParser.TOK_TABSORTCOLNAMEASC) {
            order = RelFieldCollation.Direction.ASCENDING;
          }


          // 2.5 Add to field collations
          fieldCollations.add(new RelFieldCollation(fieldIndex, order));
        }


        // 3. Add Child Project Rel if needed, Generate Output RR, input Sel Rel
        // for top constraining Sel
        RelNode obInputRel = srcRel;

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Examples of org.eigenbase.rel.RelFieldCollation

  private RelCollation convertRelCollation(RelCollation src, Map<Integer, Integer> inToOut) {
    List<RelFieldCollation> newFields = Lists.newArrayList();


    for ( RelFieldCollation field : src.getFieldCollations()) {
      if (inToOut.containsKey(field.getFieldIndex())) {
        newFields.add(new RelFieldCollation(inToOut.get(field.getFieldIndex()), field.getDirection()));
      }
    }


    if (newFields.isEmpty()) {
      return RelCollationImpl.EMPTY;

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Examples of org.eigenbase.rel.RelFieldCollation

  }


  private RelCollation getCollation(WindowRelBase.Window window) {
    List<RelFieldCollation> fields = Lists.newArrayList();
    for (int group : BitSets.toIter(window.groupSet)) {
      fields.add(new RelFieldCollation(group));
    }
    return RelCollationImpl.of(fields);
  }

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Examples of org.eigenbase.rel.RelFieldCollation


  private RelCollation getCollation(DrillAggregateRel rel){


    List<RelFieldCollation> fields = Lists.newArrayList();
    for (int group : BitSets.toIter(rel.getGroupSet())) {
      fields.add(new RelFieldCollation(group));
    }
    return RelCollationImpl.of(fields);
  }

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