csun5285 commented on code in PR #67341:
URL: https://github.com/apache/doris/pull/67341#discussion_r3893941765
##########
be/src/storage/segment/segment.cpp:
##########
@@ -143,6 +143,34 @@ Status build_segment_zonemap_context(Segment* segment,
const ReadSchema& schema,
return Status::OK();
}
+// The statistics iterator answers pushed-down aggregates from the segment
zone maps alone. An
+// invalid zone map has no min/max to answer with, so the caller has to read
the data instead.
+Status segment_zone_maps_can_answer_agg(Segment* segment, const ReadSchema&
schema,
+ const StorageReadOptions&
read_options, bool* usable) {
+ *usable = true;
+ for (size_t ordinal = 0; ordinal < schema.num_block_columns(); ++ordinal) {
+ std::shared_ptr<ColumnReader> reader;
+ Status st = segment->get_column_reader(*schema.column(ordinal),
&reader, read_options.stats,
Review Comment:
这不属于这个pr 的问题
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