HappenLee commented on code in PR #62222:
URL: https://github.com/apache/doris/pull/62222#discussion_r3186394787
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be/src/storage/segment/segment_iterator.cpp:
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@@ -2687,14 +2687,19 @@ Status SegmentIterator::_next_batch_internal(Block*
block) {
// If the row bitmap size is smaller than nrows_read_limit, there's no
need to reserve that many column rows.
uint32_t nrows_read_limit =
std::min(cast_set<uint32_t>(_row_bitmap.cardinality()),
_opts.block_row_max);
- if (_can_opt_topn_reads()) {
- nrows_read_limit = std::min(static_cast<uint32_t>(_opts.topn_limit),
nrows_read_limit);
+ if (_can_opt_limit_reads()) {
Review Comment:
segment的情况
1. 没有conjunct和predicate
2. 有conjunct和predicate
dup表： select a,b,c from tbl where a > 10 limit 100;
4096 a -》 500 > b,c limit-》100
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