morningman commented on code in PR #13515:
URL: https://github.com/apache/doris/pull/13515#discussion_r1001294789
##########
be/src/vec/exec/format/csv/csv_reader.cpp:
##########
@@ -134,10 +150,19 @@ Status CsvReader::get_next_block(Block* block, size_t*
read_rows, bool* eof) {
return Status::OK();
}
- const int batch_size = _state->batch_size();
- auto columns = block->mutate_columns();
+ if (!_init_column_pos) {
+ // Save mapping from file slot desc to column in block, so that we
don't need to
+ // find column in block by name every time.
+ for (int i = 0; i < _file_slot_descs.size(); ++i) {
+ size_t position =
block->get_position_by_name(_file_slot_descs[i]->col_name());
+ _col_posistions.push_back(position);
+ }
+ _init_column_pos = true;
+ }
Review Comment:
removed
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