zhannngchen commented on code in PR #12117:
URL: https://github.com/apache/doris/pull/12117#discussion_r956530960
##########
be/src/exec/olap_scanner.cpp:
##########
@@ -152,14 +152,15 @@ Status OlapScanner::_init_tablet_reader_params(
->rowset()
->rowset_meta()
->is_segments_overlapping());
+
+ bool has_replace_col = false;
+ RETURN_IF_ERROR(_init_return_columns(!single_non_overlapping_version,
has_replace_col));
- _tablet_reader_params.direct_mode = single_version || _aggregation;
Review Comment:
The issue here is:
1. Planner thinks scanner can scan directly, don't need merge and can do
some pre-aggregation works.
2. But scanner found it's a unqiue key table with seq column which need to
merge first.
I think we'd better fix it in planner? Planner should not set preAggregation
as true on a unique table with seq column?
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