eldenmoon commented on code in PR #49040:
URL: https://github.com/apache/doris/pull/49040#discussion_r2312831011
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be/src/olap/rowset/segment_v2/segment.cpp:
##########
@@ -589,15 +579,19 @@ vectorized::DataTypePtr Segment::get_data_type_of(const
TabletColumn& column,
int32_t unique_id = column.unique_id() > 0 ? column.unique_id() :
column.parent_unique_id();
// Find the reader for the base variant column.
- if (!_column_readers.contains(unique_id)) {
+ if (!_column_uid_to_footer_ordinal.contains(unique_id)) {
return
vectorized::DataTypeFactory::instance().create_data_type(column);
}
- const auto* variant_reader =
- static_cast<const
VariantColumnReader*>(_column_readers.at(unique_id).get());
+ std::shared_ptr<ColumnReader> reader;
+ // get the parent variant column reader
+ OlapReaderStatistics stats;
+ // If status is not ok, it will throw exception(data corruption)
+ THROW_IF_ERROR(get_column_reader(unique_id, &reader, &stats));
+ const auto* variant_reader = static_cast<const
VariantColumnReader*>(reader.get());
Review Comment:
`!_column_uid_to_footer_ordinal.contains(unique_id)` 前面的逻辑保证了这里不会是nullptr
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