REGR: fix read_sql delegation for queries on MySQL/pymysql (#25024)

Author: jorisvandenbossche

doc/source/whatsnew/v0.24.1.rst

@@ -22,6 +22,7 @@ Fixed Regressions
 
 - Bug in :meth:`DataFrame.itertuples` with ``records`` orient raising an ``AttributeError`` when the ``DataFrame`` contained more than 255 columns (:issue:`24939`)
 - Bug in :meth:`DataFrame.itertuples` orient converting integer column names to strings prepended with an underscore (:issue:`24940`)
+- Fixed regression in :func:`read_sql` when passing certain queries with MySQL/pymysql (:issue:`24988`).
 - Fixed regression in :class:`Index.intersection` incorrectly sorting the values by default (:issue:`24959`).
 - Fixed regression in :func:`merge` when merging an empty ``DataFrame`` with multiple timezone-aware columns on one of the timezone-aware columns (:issue:`25014`).
 

pandas/io/sql.py

@@ -381,7 +381,8 @@ def read_sql(sql, con, index_col=None, coerce_float=True, params=None,
 
  try:
  _is_table_name = pandas_sql.has_table(sql)
- except (ImportError, AttributeError):
+ except Exception:
+ # using generic exception to catch errors from sql drivers (GH24988)
  _is_table_name = False
 
  if _is_table_name: