[Tutor] Feedback on coding style
Dennis Lee Bieber
wlfraed at ix.netcom.com
Mon May 9 21:09:06 EDT 2022
On Tue, 10 May 2022 00:29:49 +0100, Alan Gauld via Tutor <tutor at python.org>
declaimed the following:
>In case anyone is worrying about an obvious gap, sqlite has
>a set of functions for manipulating/comparing dates/times
>which are stored internally as formatted strings.
>
If the data is a TEXT type... REAL favors using them as Julian Day
number, and INTEGER as Seconds since Jan 1 1970. See section 2.2 of the
linked documentation.
>So although there is no DATETIME type you can still do the
>usual date/time manipulations you'd expect with a database.
However, the Python module, with proper options, is supposed to handle
conversion of Python datetime.date and datetime.datetime structures in/out
SQLite3 when using "non-supported" "date" and "timestamp" as the data types
in the table definition. Note that I did NOT create a formatted datetime
when providing the timestamp in the INSERT DML (I did not check if the
converters worked on the SELECT DML, all I know is the printed reported had
a formatted datetime and not something like <datetime object ID xxx>)
Per section 3.1, "date" and "timestamp" both fall under rule #5 and get
the generic NUMERIC affinity (which probably translates to the formatted
string from the converters since such aren't "well-formed" INT or REAL
values <G>)
--
Wulfraed Dennis Lee Bieber AF6VN
wlfraed at ix.netcom.com http://wlfraed.microdiversity.freeddns.org/
More information about the Tutor
mailing list