docs: add note to clarify function documentation reference for DataFrame methods

kosiew · kosiew · commit 38043fad51bb · 2025-09-15T11:13:30.000+08:00
diff --git a/docs/source/user-guide/dataframe/index.rst b/docs/source/user-guide/dataframe/index.rst
@@ -138,6 +138,8 @@ existing column. These include:
 * :py:meth:`~datafusion.DataFrame.join` (``on`` argument)
 * :py:meth:`~datafusion.DataFrame.aggregate` (grouping columns)
 
+See the full function documentation for details on any specific function.
+
 Note that :py:meth:`~datafusion.DataFrame.join_on` expects ``col()``/``column()`` expressions rather than plain strings.
 
 For such methods, you can pass column names directly:
