Added line to whatsnew/v1.1.0.rst

Author: JohanKahrstrom

doc/source/whatsnew/v1.1.0.rst

@@ -872,6 +872,7 @@ I/O
 - Bug in :meth:`read_parquet` was raising a ``FileNotFoundError`` when passed an s3 directory path. (:issue:`26388`)
 - Bug in :meth:`~DataFrame.to_parquet` was throwing an ``AttributeError`` when writing a partitioned parquet file to s3 (:issue:`27596`)
 - Bug in :meth:`~DataFrame.to_excel` could not handle the column name `render` and was raising an ``KeyError`` (:issue:`34331`)
+- Bug in :meth:`read_sql` was returning an empty generator when chunksize is set and query returns zero results. Now correctly returns a generator with a single empty DataFrame (:issue:`34411`)
 
 Plotting
 ^^^^^^^^