Exemplo n.º 1
0
  public Double getMaxRowCount(Sort rel, RelMetadataQuery mq) {
    Double rowCount = mq.getMaxRowCount(rel.getInput());
    if (rowCount == null) {
      rowCount = Double.POSITIVE_INFINITY;
    }
    final int offset = rel.offset == null ? 0 : RexLiteral.intValue(rel.offset);
    rowCount = Math.max(rowCount - offset, 0D);

    if (rel.fetch != null) {
      final int limit = RexLiteral.intValue(rel.fetch);
      if (limit < rowCount) {
        return (double) limit;
      }
    }
    return rowCount;
  }
Exemplo n.º 2
0
  public Double getMaxRowCount(RelSubset rel, RelMetadataQuery mq) {
    // FIXME This is a short-term fix for [CALCITE-1018]. A complete
    // solution will come with [CALCITE-1048].
    Util.discard(Bug.CALCITE_1048_FIXED);
    for (RelNode node : rel.getRels()) {
      if (node instanceof Sort) {
        Sort sort = (Sort) node;
        if (sort.fetch != null) {
          return (double) RexLiteral.intValue(sort.fetch);
        }
      }
    }

    return Double.POSITIVE_INFINITY;
  }