Expressions are being changed automatcally while parsing group by clause

[hashir0981]

Describe the bug
It is hallucinating some expressions that include datetime. That should'nt be the expected result.

To Reproduce
def strip_alias_from_group_by(group_by: str) -> str:
sql = f"""
SELECT
{group_by.strip()}
FROM
TABLE1
""".strip()
parsed_sql = parse_one(sql, dialect="databricks", read="databricks")
return ", ".join(map(lambda i: f"{i.alias}" if i.alias else i.sql(), parsed_sql.expressions))

What's the concrete error / traceback.

Expected behavior
A clear and concise description of what you expected to happen.

Versions (please complete the following information):

• Python: [e.g. 3.11.2]
• sqlparse: [e.g. 0.4.1]

Additional context
Add any other context about the problem here.

[andialbrecht]

Please provide more details about the error. How to reproduce it, the expected and actual output of any kind.