eldenmoon commented on code in PR #26749:
URL: https://github.com/apache/doris/pull/26749#discussion_r1393619371
##########
be/src/olap/rowset/segment_v2/segment_iterator.cpp:
##########
@@ -1891,6 +1960,49 @@ Status SegmentIterator::next_batch(vectorized::Block*
block) {
return status;
}
+Status SegmentIterator::_convert_to_expected_type(const std::vector<ColumnId>&
col_ids) {
+ for (ColumnId i : col_ids) {
+ if (_current_return_columns[i] == nullptr || _converted_column_ids[i]
||
+ _is_pred_column[i]) {
+ continue;
+ }
+ if (!_segment->same_with_storage_type(
+ i, *_schema, _opts.io_ctx.reader_type !=
ReaderType::READER_QUERY)) {
+ const Field* field_type = _schema->column(i);
+ vectorized::DataTypePtr expected_type =
Schema::get_data_type_ptr(*field_type);
+ vectorized::DataTypePtr file_column_type =
_storage_name_and_type[i].second;
+ vectorized::ColumnPtr expected;
+ vectorized::ColumnPtr original =
+ _current_return_columns[i]->assume_mutable()->get_ptr();
+ RETURN_IF_ERROR(vectorized::schema_util::cast_column({original,
file_column_type, ""},
+
expected_type, &expected));
+ _current_return_columns[i] = expected->assume_mutable();
+ _converted_column_ids[i] = 1;
+ VLOG_DEBUG << fmt::format("Convert {} fom file column type {} to
{}, num_rows {}",
+ field_type->path().get_path(),
file_column_type->get_name(),
+ expected_type->get_name(),
+ _current_return_columns[i]->size());
+ }
+ }
+ return Status::OK();
+}
+
+Status SegmentIterator::copy_column_data_by_selector(vectorized::IColumn*
input_col_ptr,
+
vectorized::MutableColumnPtr& output_col,
Review Comment:
The Block interface should remain oblivious to storage details, making the
use of args within it somewhat peculiar. Considering that
copy_column_data_to_block is exclusively utilized in the segment iterator, its
removal might be a viable option
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