fixed error handler syntax in SQLDatabase.to_sql

Author: arw2019

pandas/io/sql.py

@@ -1400,9 +1400,9 @@ def to_sql(
             msg = '(1054, "Unknown column ' + "'inf' in 'field list'" + '")'
             errText = str(err.orig)
             if re.search(msg, errText):
-                raise ValueError("inf can not be used with MySQL")
+                raise ValueError("inf can not be used with MySQL") from err
             else:
-                raise ValueError(err)
+                raise err
 
         if not name.isdigit() and not name.islower():
             # check for potentially case sensitivity issues (GH7815)