EXPORT PART sometimes doesnt preserve ordering in output Parquet file #1135
Description
Following statement was used to export part.
ALTER TABLE <tbl_name> EXPORT PART '20251016-365_0_807_4' TO TABLE <tbl_name_export>
settings allow_experimental_export_merge_tree_part=1, export_merge_tree_part_overwrite_file_if_exists=1,output_format_parquet_parallel_encoding=0, output_format_parallel_formatting=0;
<tbl_name> uses 5 fields in ORDER BY. Output Parquet file has several rows that are out of order.
It happened just for 1 part out of 600 that were exported so it seems that issue depends on data.
Expected behavior
All rows in Parquet file should be sorted according to columns in ORDER BY<tbl_name>