eldenmoon commented on code in PR #49040:
URL: https://github.com/apache/doris/pull/49040#discussion_r2196688865
##########
be/src/olap/rowset/segment_v2/segment.cpp:
##########
@@ -897,63 +964,118 @@ Status Segment::new_column_iterator(const TabletColumn&
tablet_column,
return new_column_iterator_with_path(tablet_column, iter, opt);
}
// init default iterator
- if (!_column_readers.contains(tablet_column.unique_id())) {
+ if (!_column_uid_to_footer_ordinal.contains(tablet_column.unique_id())) {
RETURN_IF_ERROR(new_default_iterator(tablet_column, iter));
return Status::OK();
}
// init iterator by unique id
+ std::shared_ptr<ColumnReader> reader;
+ RETURN_IF_ERROR(_get_column_reader(tablet_column, &reader));
ColumnIterator* it;
- RETURN_IF_ERROR(
- _column_readers.at(tablet_column.unique_id())->new_iterator(&it,
&tablet_column));
+ RETURN_IF_ERROR(reader->new_iterator(&it, &tablet_column));
iter->reset(it);
if (config::enable_column_type_check && !tablet_column.is_agg_state_type()
&&
- tablet_column.type() !=
_column_readers.at(tablet_column.unique_id())->get_meta_type()) {
+ tablet_column.type() != reader->get_meta_type()) {
LOG(WARNING) << "different type between schema and column reader,"
<< " column schema name: " << tablet_column.name()
<< " column schema type: " << int(tablet_column.type())
- << " column reader meta type: "
- <<
int(_column_readers.at(tablet_column.unique_id())->get_meta_type());
+ << " column reader meta type: " <<
int(reader->get_meta_type());
return Status::InternalError("different type between schema and column
reader");
}
return Status::OK();
}
-Status Segment::new_column_iterator(int32_t unique_id, const
StorageReadOptions* opt,
- std::unique_ptr<ColumnIterator>* iter) {
- RETURN_IF_ERROR(_create_column_readers_once(opt->stats));
- ColumnIterator* it;
- TabletColumn tablet_column = _tablet_schema->column_by_uid(unique_id);
- RETURN_IF_ERROR(_column_readers.at(unique_id)->new_iterator(&it,
&tablet_column));
- iter->reset(it);
+Status Segment::_get_column_reader(vectorized::PathInDataRef relative_path,
uint32_t col_uid,
+ std::shared_ptr<ColumnReader>*
column_reader) {
+ if (!_tablet_schema->has_column_unique_id(col_uid)) {
+ *column_reader = nullptr;
Review Comment:
返回NotFound比较合理
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