https://github.com/python/cpython/commit/e425b075fe80398845eaccefe28fef0f0dc83f1b
commit: e425b075fe80398845eaccefe28fef0f0dc83f1b
branch: 3.13
author: Miss Islington (bot) <31488909+miss-isling...@users.noreply.github.com>
committer: erlend-aasland <erlend.aasl...@protonmail.com>
date: 2025-03-18T12:09:41+01:00
summary:
[3.13] gh-131002: clarify how to enforce sqlite3 column types for generated
fields (GH-131006) (#131385)
(cherry picked from commit f48887fb97651c02c5e412a75ed8b51a4ca11e6a)
Co-authored-by: Erlend E. Aasland <erl...@python.org>
files:
M Doc/library/sqlite3.rst
diff --git a/Doc/library/sqlite3.rst b/Doc/library/sqlite3.rst
index 0d2004497882e2..2a8463310ca880 100644
--- a/Doc/library/sqlite3.rst
+++ b/Doc/library/sqlite3.rst
@@ -290,9 +290,6 @@ Module functions
:const:`PARSE_DECLTYPES` and :const:`PARSE_COLNAMES`
to enable this.
Column names takes precedence over declared types if both flags are set.
- Types cannot be detected for generated fields (for example
``max(data)``),
- even when the *detect_types* parameter is set; :class:`str` will be
- returned instead.
By default (``0``), type detection is disabled.
:param isolation_level:
@@ -436,21 +433,6 @@ Module constants
old style (pre-Python 3.12) transaction control behaviour.
See :ref:`sqlite3-transaction-control-isolation-level` for more information.
-.. data:: PARSE_COLNAMES
-
- Pass this flag value to the *detect_types* parameter of
- :func:`connect` to look up a converter function by
- using the type name, parsed from the query column name,
- as the converter dictionary key.
- The type name must be wrapped in square brackets (``[]``).
-
- .. code-block:: sql
-
- SELECT p as "p [point]" FROM test; ! will look up converter "point"
-
- This flag may be combined with :const:`PARSE_DECLTYPES` using the ``|``
- (bitwise or) operator.
-
.. data:: PARSE_DECLTYPES
Pass this flag value to the *detect_types* parameter of
@@ -472,6 +454,27 @@ Module constants
This flag may be combined with :const:`PARSE_COLNAMES` using the ``|``
(bitwise or) operator.
+ .. note::
+
+ Generated fields (for example ``MAX(p)``) are returned as :class:`str`.
+ Use :const:`!PARSE_COLNAMES` to enforce types for such queries.
+
+.. data:: PARSE_COLNAMES
+
+ Pass this flag value to the *detect_types* parameter of
+ :func:`connect` to look up a converter function by
+ using the type name, parsed from the query column name,
+ as the converter dictionary key.
+ The query column name must be wrapped in double quotes (``"``)
+ and the type name must be wrapped in square brackets (``[]``).
+
+ .. code-block:: sql
+
+ SELECT MAX(p) as "p [point]" FROM test; ! will look up converter "point"
+
+ This flag may be combined with :const:`PARSE_DECLTYPES` using the ``|``
+ (bitwise or) operator.
+
.. data:: SQLITE_OK
SQLITE_DENY
SQLITE_IGNORE
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