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gh-99824: Document that sqlite3.connect implicitly open a transaction if autocommit=False by geryogam · Pull Request #99825 · python/cpython · GitHub
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gh-99824: Document that sqlite3.connect implicitly open a transaction if autocommit=False #99825

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Merged
erlend-aasland merged 8 commits into from
Nov 30, 2022
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gh-99824: Document that sqlite3.connect implicitly open a transaction if autocommit=False #99825

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86b8244
Document sqlite3.connect() as implicitly opening transactions in the …
geryogam Nov 21, 2022
c3963f4
Document sqlite3.connect() as implicitly opening transactions in the …
geryogam Nov 28, 2022
9cbd2c6
Revert "Document sqlite3.connect() as implicitly opening transactions…
geryogam Nov 28, 2022
a9273c6
Apply Erlend’s change suggestion
geryogam Nov 28, 2022
452c52a
Move and extend the implicit transaction opening sentence for connect()
geryogam Nov 29, 2022
d866e90
Add a similar descriptive sentence for the isolation_level parameter
geryogam Nov 29, 2022
0d15229
Apply CAM’s suggested change
geryogam Nov 30, 2022
7fd8cb7
Merge branch 'main' into sqlite3/implicit-transactions
erlend-aasland Nov 30, 2022
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@geryogam
geryogam authored Nov 30, 2022
commit 0d15229dfaebcc31b8aad17ef3a75ec19dde1e03
10 changes: 3 additions & 7 deletions Doc/library/sqlite3.rst
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Expand Up @@ -292,7 +292,6 @@ Module functions
By default (``0``), type detection is disabled.

:param isolation_level:
Control legacy transaction handling behaviour.
See :attr:`Connection.isolation_level` and
:ref:`sqlite3-transaction-control-isolation-level` for more information.
Can be ``"DEFERRED"`` (default), ``"EXCLUSIVE"`` or ``"IMMEDIATE"``;
Expand Down Expand Up @@ -326,11 +325,8 @@ Module functions
enabling various :ref:`sqlite3-uri-tricks`.

:param autocommit:
Control :pep:`249` transaction handling behaviour.
See :attr:`Connection.autocommit` and
:ref:`sqlite3-transaction-control-autocommit` for more information.
If ``False``, a new transaction is implicitly opened
when the :class:`Connection` is created.
*autocommit* currently defaults to
:data:`~sqlite3.LEGACY_TRANSACTION_CONTROL`.
The default will change to ``False`` in a future Python release.
Expand Down Expand Up @@ -2472,9 +2468,9 @@ which implies :pep:`249`-compliant transaction control.
This means:

* :mod:`!sqlite3` ensures that a transaction is always open,
so :meth:`Connection.commit` and :meth:`Connection.rollback`
will implicitly open a new transaction immediately after closing
the pending one.
so :func:`connect`, :meth:`Connection.commit`, and :meth:`Connection.rollback`
will implicitly open a new transaction
(immediately after closing the pending one, for the latter two).
:mod:`!sqlite3` uses ``BEGIN DEFERRED`` statements when opening transactions.
* Transactions should be committed explicitly using :meth:`!commit`.
* Transactions should be rolled back explicitly using :meth:`!rollback`.
Expand Down