Don't set timestamp format when splitting a timestamp-less file (fixes …

…#167). (#231)

components/core/src/clp/streaming_archive/writer/utils.cpp

@@ -25,14 +25,17 @@ auto split_file(
         Archive& archive_writer
 ) -> void {
     auto const& encoded_file = archive_writer.get_file();
+    auto has_ts_pattern = encoded_file.has_ts_pattern();
     auto orig_file_id = encoded_file.get_orig_file_id();
     auto split_ix = encoded_file.get_split_ix();
     archive_writer.set_file_is_split(true);
     close_file_and_append_to_segment(archive_writer);
 
     archive_writer.create_and_open_file(path_for_compression, group_id, orig_file_id, ++split_ix);
-    // Initialize the file's timestamp pattern to the previous split's pattern
-    archive_writer.change_ts_pattern(last_timestamp_pattern);
+    if (has_ts_pattern) {
+        // Initialize the file's timestamp pattern to the previous split's pattern
+        archive_writer.change_ts_pattern(last_timestamp_pattern);
+    }
 }
 
 auto split_file_and_archive(
@@ -43,6 +46,7 @@ auto split_file_and_archive(
         Archive& archive_writer
 ) -> void {
     auto const& encoded_file = archive_writer.get_file();
+    auto has_ts_pattern = encoded_file.has_ts_pattern();
     auto orig_file_id = encoded_file.get_orig_file_id();
     auto split_ix = encoded_file.get_split_ix();
     archive_writer.set_file_is_split(true);
@@ -51,8 +55,10 @@ auto split_file_and_archive(
     split_archive(archive_user_config, archive_writer);
 
     archive_writer.create_and_open_file(path_for_compression, group_id, orig_file_id, ++split_ix);
-    // Initialize the file's timestamp pattern to the previous split's pattern
-    archive_writer.change_ts_pattern(last_timestamp_pattern);
+    if (has_ts_pattern) {
+        // Initialize the file's timestamp pattern to the previous split's pattern
+        archive_writer.change_ts_pattern(last_timestamp_pattern);
+    }
 }
 
 auto close_file_and_append_to_segment(Archive& archive_writer) -> void {