AshinGau commented on code in PR #19039:
URL: https://github.com/apache/doris/pull/19039#discussion_r1176032256
##########
be/src/vec/exec/format/parquet/vparquet_group_reader.cpp:
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@@ -450,6 +448,17 @@ Status RowGroupReader::_do_lazy_read(Block* block, size_t
batch_size, size_t* re
block->get_by_name(col.first).column->assume_mutable()->clear();
}
Block::erase_useless_column(block, origin_column_num);
+
+ if (!pre_eof) {
+ // If continuous batches are skipped, we can cache them to
skip a whole page
+ _cached_filtered_rows += pre_read_rows;
+ } else { // pre_eof
+ // If select_vector_ptr->filter_all() and pre_eof, we can skip
whole row group.
+ *read_rows = 0;
+ *batch_eof = true;
+ _lazy_read_filtered_rows += pre_read_rows;
Review Comment:
We should remove the useless columns(filter columns) and clean the predicate
columns.
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