Clarifying suggestion for the future with additional commentary

databrickslabs · Sep 22, 2023 · 8157d61 · 8157d61
1 parent f141f48
commit 8157d61
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/python/tempo/tsdf.py b/python/tempo/tsdf.py
@@ -161,6 +161,7 @@ def __addPrefixToColumns(self, col_list: list[str], prefix: str) -> "TSDF":
 
         # build a column rename map
         col_map = {col: "_".join([prefix, col]) for col in col_list}
+        # In the future (when Spark 3.4+ is standard) we should implement batch rename using:
         # df = self.df.withColumnsRenamed(col_map)
 
         # build a list of column expressions to rename columns in a select