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;
}
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;
}