yiguolei commented on code in PR #51271:
URL: https://github.com/apache/doris/pull/51271#discussion_r2108084035
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be/src/olap/rowset/beta_rowset_reader.cpp:
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@@ -221,6 +222,38 @@ Status
BetaRowsetReader::get_segment_iterators(RowsetReaderContext* read_context
_read_options.io_ctx.expiration_time = 0;
}
+ if (config::enable_rowset_zone_map_cache) {
+ RETURN_IF_ERROR(_rowset->load_segments_info());
+ const auto& zone_maps = _rowset->get_zone_maps();
Review Comment:
这里传入column ids，我们按需加载；而不是一次把一个segment 所有列的zonemap 都加载起来。
这样，比如一个表有10000列，但是过滤条件常见的就10个，我们这里就只会缓存10个column的zonemap，不至于一点不缓存。
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