Examples of org.eigenbase.util.mapping.Mapping

org.eigenbase.util.mapping.Mapping
A Mapping is a relationship between a source domain to target domain of integers.
This interface represents the most general possible mapping. Depending on the {@link MappingType} of a particular mapping, some of the operations maynot be applicable. If you call the method, you will receive a runtime error. For instance:
- If a target has more than one source, then the method {@link #getSource(int)} will throw{@link Mappings.TooManyElementsException}.
- If a source has no targets, then the method {@link #getTarget} will throw{@link Mappings.NoElementException}.

        RelMetadataQuery.getPulledUpPredicates(child);


    List<RexNode> projectPullUpPredicates = new ArrayList<RexNode>();


    BitSet columnsMapped = new BitSet(child.getRowType().getFieldCount());
    Mapping m = Mappings.create(MappingType.PARTIAL_FUNCTION,
        child.getRowType().getFieldCount(),
        project.getRowType().getFieldCount());


    for (Ord<RexNode> o : Ord.zip(project.getProjects())) {
      if (o.e instanceof RexInputRef) {
        int sIdx = ((RexInputRef) o.e).getIndex();
        m.set(sIdx, o.i);
        columnsMapped.set(sIdx);
      }
    }


    // Go over childPullUpPredicates. If a predicate only contains columns in

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        RelMetadataQuery.getPulledUpPredicates(child);


    List<RexNode> aggPullUpPredicates = new ArrayList<RexNode>();


    BitSet groupKeys = agg.getGroupSet();
    Mapping m = Mappings.create(MappingType.PARTIAL_FUNCTION,
        child.getRowType().getFieldCount(), agg.getRowType().getFieldCount());


    int i = 0;
    for (int j : BitSets.toIter(groupKeys)) {
      m.set(j, i++);
    }


    for (RexNode r : childInfo.pulledUpPredicates) {
      BitSet rCols = RelOptUtil.InputFinder.bits(r);
      if (BitSets.contains(groupKeys, rCols)) {

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        RelMetadataQuery.getPulledUpPredicates(child);


    List<RexNode> projectPullUpPredicates = new ArrayList<RexNode>();


    BitSet columnsMapped = new BitSet(child.getRowType().getFieldCount());
    Mapping m = Mappings.create(MappingType.PARTIAL_FUNCTION,
        child.getRowType().getFieldCount(),
        project.getRowType().getFieldCount());


    for (Ord<RexNode> o : Ord.zip(project.getProjects())) {
      if (o.e instanceof RexInputRef) {
        int sIdx = ((RexInputRef) o.e).getIndex();
        m.set(sIdx, o.i);
        columnsMapped.set(sIdx);
      }
    }


    // Go over childPullUpPredicates. If a predicate only contains columns in

View Full Code Here

        RelMetadataQuery.getPulledUpPredicates(child);


    List<RexNode> aggPullUpPredicates = new ArrayList<RexNode>();


    BitSet groupKeys = agg.getGroupSet();
    Mapping m = Mappings.create(MappingType.PARTIAL_FUNCTION,
        child.getRowType().getFieldCount(), agg.getRowType().getFieldCount());


    int i = 0;
    for (int j : BitSets.toIter(groupKeys)) {
      m.set(j, i++);
    }


    for (RexNode r : childInfo.pulledUpPredicates) {
      BitSet rCols = RelOptUtil.InputFinder.bits(r);
      if (BitSets.contains(groupKeys, rCols)) {

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Related Classes of org.eigenbase.util.mapping.Mapping

org.eigenbase.rel.metadata.RelMdPredicates

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