Skip to content

gh-81040: Improve sqlite3.Cursor.rowcount docs #94940

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 2 commits into from
Jul 22, 2022
Merged

gh-81040: Improve sqlite3.Cursor.rowcount docs #94940

Changes from 1 commit
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
1950829
gh-81040: Improve sqlite3.Cursor.rowcount docs
erlend-aasland Jul 17, 2022
cdd0bcd
Address CAM's review
erlend-aasland Jul 22, 2022
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
17 changes: 5 additions & 12 deletions Doc/library/sqlite3.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -966,18 +966,11 @@ Cursor Objects

.. attribute:: rowcount

Although the :class:`Cursor` class of the :mod:`sqlite3` module implements this
attribute, the database engine's own support for the determination of "rows
affected"/"rows selected" is quirky.

For :meth:`executemany` statements, the number of modifications are summed up
into :attr:`rowcount`.

As required by the Python DB API Spec, the :attr:`rowcount` attribute "is -1 in
case no ``executeXX()`` has been performed on the cursor or the rowcount of the
last operation is not determinable by the interface". This includes ``SELECT``
statements because we cannot determine the number of rows a query produced
until all rows were fetched.
This read-only attribute provides the number of modified rows for
``INSERT``, ``UPDATE``, ``DELETE``, and ``REPLACE`` statements;
``-1`` for other statements,
including :abbr:`CTE queries (Common Table Expression)`.
It is only updated by the :meth:`execute` and :meth:`executemany` methods.

.. attribute:: lastrowid

Expand Down