hubgeter commented on code in PR #22115:
URL: https://github.com/apache/doris/pull/22115#discussion_r1271710265
##########
be/src/vec/exec/format/parquet/vparquet_reader.cpp:
##########
@@ -511,6 +511,34 @@ Status
ParquetReader::get_columns(std::unordered_map<std::string, TypeDescriptor
return Status::OK();
}
+Status ParquetReader::get_next_block(Block* block, size_t* read_rows, bool*
eof,
+ TPushAggOp::type push_down_agg_type_opt) {
+ if (push_down_agg_type_opt != TPushAggOp::type::COUNT) {
+ return Status::NotSupported("min/max push down is not supported for
parquet files");
+ }
+ size_t rows = 0;
+
+ // out of use _t_metadata->num_rows , because for the same file,
+ // the optimizer may generate multiple VFileScanner with different
_scan_range
+ while (_read_row_groups.size() > 0) {
+ _next_row_group_reader();
+ rows += _current_group_reader->get__remaining_rows();
+ }
+
+ //fill one column is enough
+ auto cols = block->mutate_columns();
+ for (auto& col : cols) {
+ col->resize(rows);
Review Comment:
good idea
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