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Diffstat (limited to 'Doc/library/sqlite3.rst')
| -rw-r--r-- | Doc/library/sqlite3.rst | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/Doc/library/sqlite3.rst b/Doc/library/sqlite3.rst index d1005b5..76693bd 100644 --- a/Doc/library/sqlite3.rst +++ b/Doc/library/sqlite3.rst @@ -629,9 +629,16 @@ Cursor Objects .. attribute:: lastrowid This read-only attribute provides the rowid of the last modified row. It is - only set if you issued an ``INSERT`` statement using the :meth:`execute` - method. For operations other than ``INSERT`` or when :meth:`executemany` is - called, :attr:`lastrowid` is set to :const:`None`. + only set if you issued an ``INSERT`` or a ``REPLACE`` statement using the + :meth:`execute` method. For operations other than ``INSERT`` or + ``REPLACE`` or when :meth:`executemany` is called, :attr:`lastrowid` is + set to :const:`None`. + + If the ``INSERT`` or ``REPLACE`` statement failed to insert the previous + successful rowid is returned. + + .. versionchanged:: 3.6 + Added support for the ``REPLACE`` statement. .. attribute:: description @@ -918,9 +925,7 @@ Controlling Transactions By default, the :mod:`sqlite3` module opens transactions implicitly before a Data Modification Language (DML) statement (i.e. -``INSERT``/``UPDATE``/``DELETE``/``REPLACE``), and commits transactions -implicitly before a non-DML, non-query statement (i. e. -anything other than ``SELECT`` or the aforementioned). +``INSERT``/``UPDATE``/``DELETE``/``REPLACE``). So if you are within a transaction and issue a command like ``CREATE TABLE ...``, ``VACUUM``, ``PRAGMA``, the :mod:`sqlite3` module will commit implicitly @@ -940,6 +945,9 @@ Otherwise leave it at its default, which will result in a plain "BEGIN" statement, or set it to one of SQLite's supported isolation levels: "DEFERRED", "IMMEDIATE" or "EXCLUSIVE". +.. versionchanged:: 3.6 + :mod:`sqlite3` used to implicitly commit an open transaction before DDL + statements. This is no longer the case. Using :mod:`sqlite3` efficiently |