v.22.6Performance Improvement
Improve Performance and Memory Usage for Subset Column Selection in Multiple Formats
Improve performance and memory usage for select of subset of columns for formats Native, Protobuf, CapnProto, JSONEachRow, TSKV, all formats with suffixes WithNames/WithNamesAndTypes. Previously while selecting only subset of columns from files in these formats all columns were read and stored in memory. Now only required columns are read. This PR enables setting input_format_skip_unknown_fields by default, because otherwise in case of select of subset of columns exception will be thrown. #37192 (Kruglov Pavel).