$ feast apply
Traceback (most recent call last):
  File "/Users/achal/tecton/feast/.direnv/python-3.7.10/bin/feast", line 33, in <module>
    sys.exit(load_entry_point('feast', 'console_scripts', 'feast')())
  File "/Users/achal/tecton/feast/.direnv/python-3.7.10/lib/python3.7/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/Users/achal/tecton/feast/.direnv/python-3.7.10/lib/python3.7/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/Users/achal/tecton/feast/.direnv/python-3.7.10/lib/python3.7/site-packages/click/core.py", line 1259, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Users/achal/tecton/feast/.direnv/python-3.7.10/lib/python3.7/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/Users/achal/tecton/feast/.direnv/python-3.7.10/lib/python3.7/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/Users/achal/tecton/feast/.direnv/python-3.7.10/lib/python3.7/site-packages/click/decorators.py", line 21, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/Users/achal/tecton/feast/sdk/python/feast/cli.py", line 192, in apply_total_command
    apply_total(repo_config, repo)
  File "/Users/achal/tecton/feast/sdk/python/feast/telemetry.py", line 151, in exception_logging_wrapper
    result = func(*args, **kwargs)
  File "/Users/achal/tecton/feast/sdk/python/feast/repo_operations.py", line 131, in apply_total
    repo = parse_repo(repo_path)
  File "/Users/achal/tecton/feast/sdk/python/feast/repo_operations.py", line 97, in parse_repo
    module = importlib.import_module(module_path)
  File "/usr/local/opt/python@3.7/Frameworks/Python.framework/Versions/3.7/lib/python3.7/importlib/__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1006, in _gcd_import
  File "<frozen importlib._bootstrap>", line 983, in _find_and_load
  File "<frozen importlib._bootstrap>", line 967, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 677, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 728, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/Users/achal/tecton/feast/splendid_lark/example.py", line 46, in <module>
    table_ref="feast-oss.demo_data.driver_activity"
  File "/Users/achal/tecton/feast/sdk/python/feast/data_source.py", line 677, in __init__
    or self._infer_event_timestamp_column("TIMESTAMP|DATETIME"),
  File "/Users/achal/tecton/feast/sdk/python/feast/data_source.py", line 547, in _infer_event_timestamp_column
    """
TypeError:
                    Unable to infer DataSource event_timestamp_column due to an absence of columns that satisfy the criteria.
                     Please specify event_timestamp_column explicitly.

driver_stats_fv = FeatureView(
    name="driver_activity",
    entities=["driver_id"],
    input=BigQuerySource(
        table_ref="feast-oss.demo_data.driver_activity"
    )
)