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updates in sqlite3 do not work


Chris Fonnesbeck wrote:
> I have a script set up to perform UPDATE commands on an sqlite database
> using the sqlite3 module. Everything appears to run fine (there are no
> error messages), except that none of the UPDATE commands appear to have
> actually updated the table. If I run each command on its own in a sqlite
> session, the UPDATE command works fine, so it is not a SQL syntax issue.
> UPDATE simply seems not to work. Any idea what the problem might be?

You need to explicitly commit the transaction e.g.:

import sqlite3.dbapi2 as sqlite

con = sqlite.connect("temp.db")
cur = con.cursor()

cur.execute("create table test (id INTEGER, name CHAR)")
cur.execute("insert into test values (1, 'bob')")
con.commit()

HTH
Paul

--
pkm ~ http://paulmcnett.com

Did you try a commit() ?

SQLite3 works in autocommit mode by default,
so it would help to see your code.

On Mi, 30.05.2007, 00:30, Chris Fonnesbeck wrote:

On 5/29/07, Stefan Sonnenberg-Carstens

As the other people said, you need to issue db.commit() (or whatever
you're database variable is).

I just ran into this after converting a MyISAM table to InnoDB, and
was annoyed as crap for a while, until I found out that you need to
explicitly commit on InnoDB tables, then I felt stupid.

I was using MySQLdb, not sqlite3, but I'm sure it's got right around
the same functionality.

On May 30, 8:43 am, "Stefan Sonnenberg-Carstens"

<stefan.sonnenb@pythonmeister.com> wrote:
> Did you try a commit() ?

> SQLite3 works in autocommit mode by default,

Errrrmmmm .... IF it worked in auto-commit mode, then the OP wouldn't
need to use Connection.commit(-:)

The underlying SLQite3 may work in auto-commit mode, but the Python
interface should not. See PEP 249 : """Note that if the database
supports an auto-commit feature, this must be initially off."""
Consequently the user of any/every DPAPIv2.0-compliant package should
be calling commit.

HTH,
John

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