simon,
>This is normally resolved by logging the time each command was issued
Not "when it was issued" but when exactly it was finally commited. When
one or more update statements are part of a transcation, you now have
to use sqlite3_profile to log when exactly the transaction ended (i.e.
On 13 Aug 2015, at 5:28pm, Tim Streater wrote:
> Presumably all the OP needs to do (in the future, at any rate) is:
>
> open first db
> attach second db
> start transaction
> do updates to first db;
> do identical updates to second db
> commit transaction
> close connection
>
> or some
Simon,
Your example is a very simple, yet elegant example of why database
synchronisation is a ?difficult? problem to solve.
As you say at the bottom of your e-mail, for the database to be correct, it has
to determine the intentions of two sets of users to work out the solution. Even
if
On 13 Aug 2015 at 16:20, Simon Slavin wrote:
> On 13 Aug 2015, at 4:03pm, sqlite-mail wrote:
>
>> With that would be trivial to log the statements that change the database to
>> replicate elsewhere.
>
> As Jean-Christophe wrote, it's not that simple. There are huge books written
> on the
Hello !
?
This request is a common requirement and in my opinion would be better solved
by an extension to the actual sqlite3 api functions.
?
Actually there is sqlite3_trace that can be used to watch all sql statements
executed on a given session.
?
One possible way would be to
On 13 Aug 2015, at 4:03pm, sqlite-mail wrote:
> With that would be trivial to log the statements that change the database to
> replicate elsewhere.
As Jean-Christophe wrote, it's not that simple. There are huge books written
on the problems involved in synchronising two copies of a
Thanks TIm
On 13 August 2015 at 15:31, Tim Streater wrote:
> On 13 Aug 2015 at 11:34, Chris Parsonson wrote:
>
> > Has anybody ever used this ATTTACH command?
>
> Here's what I do to move a row from one database to another (same
> table/column defs). I have to go via a temporary db (I use the
On 13 Aug 2015 at 11:34, Chris Parsonson wrote:
> Has anybody ever used this ATTTACH command?
Here's what I do to move a row from one database to another (same table/column
defs). I have to go via a temporary db (I use the :memory: one) since the
primary key needs a new value in the second
Has anybody ever used this ATTTACH command?
Still doesn't work
Dim dbConnection As New SQLiteConnection
Dim dbDataSet As New DataSet
Dim SQLStmt As String
Dim sDBPath As String = Application.StartupPath & "\wolfpro.db3"
Dim sUpdateDBPath As String =
Hi Simon,
>Method 2
>
>
>Ignore Method 1. In each copy of your database keep a log of all
>INSERT and UPDATE commands executed since the last 'synchronize':
>
>CREATE TABLE commandsSinceLastSynch (theCommand TEXT)
>
>To synchronise the two copies, play back the log for copy A to copy B
On 13 Aug 2015, at 11:34am, Chris Parsonson wrote:
> Has anybody ever used this ATTTACH command?
> Still doesn't work
The code shown does not read the row back again once it is written. What makes
you think your new row is not being stored ?
What does it do when it doesn't work ?
On Thu, Aug 13, 2015 at 11:12 AM, wrote:
> On Thu Aug 13, 2015 at 10:06:44AM +0200, Dominique Devienne wrote:
> > The new RBU [1] extension, coupled with the new sqldiff utility, might
> be of interest too.--DD
>
> Is there a table of contents or index of SQLite extensions somewhere on
> the
In fact I found the database in the Documents folder.
"C:\Users\Chris\Documents\UpdateWolfpro.db3"
but it made no difference. But the ATTACH gives no error in either my first
attempt or this second one.
On 13 August 2015 at 10:45, R.Smith wrote:
>
>
> On 2015-08-13 10:26 AM, Chris Parsonson
On Thu Aug 13, 2015 at 10:06:44AM +0200, Dominique Devienne wrote:
>
> The new RBU [1] extension, coupled with the new sqldiff utility,
> might be of interest too.--DD
>
> [1] http://www.sqlite.org/rbu.html
Is there a table of contents or index of SQLite extensions somewhere on
the main
On 13 Aug 2015, at 10:16am, Chris Parsonson wrote:
> the ATTACH gives no error in either my first
> attempt or this second one.
Then it's probably working.
>SQLStmt = "ATTACH '" & sUpdateDBPath & "' AS UPD;"
So after you've done that, write some code to insert a new row into a
On Thu, Aug 13, 2015 at 4:05 AM, Chris Parsonson wrote:
> So can someone give me a working example of two database ATTACHed and a
> simple select using columns from a table in each database
C:\SQLite3>sqlite3 C:\SQLite3\UpdateWolfpro.db3
SQLite version 3.8.11.1 2015-07-29 20:00:57
Enter
On 2015-08-13 10:26 AM, Chris Parsonson wrote:
> OK here's my code which is just test code, not intended to do anything
> useful. It runs without error, but the DELETE just doesn't do anything
> Dim dbConnection As New SQLiteConnection
> Dim dbDataSet As New DataSet
>
OK here's my code which is just test code, not intended to do anything
useful. It runs without error, but the DELETE just doesn't do anything
Dim dbConnection As New SQLiteConnection
Dim dbDataSet As New DataSet
Dim SQLStmt As String
Dim sDBPath As String =
On 13 Aug 2015 at 09:05, Chris Parsonson wrote:
> So can someone give me a working example of two database ATTACHed and a
> simple select using columns from a table in each database
Why not try the sequence you want using the sqlite3 CLI program, on a simple
example that mimics the essence of
To Attach a second Database is fairly straightforward and shouldn't fail
unless there is a physical problem with either of the files.
The Attach command example is like this (on a WinX machine):
ATTACH DATABASE 'C:\Documents\OtherDatabase.db' AS "DB2";
Execute that as a standard SQL statement.
On Thu, Aug 13, 2015 at 4:52 AM, Chris Parsonson wrote:
> I need to be able to synchronise some fairly simple table in two databases.
> Can someone help please
>
The new RBU [1] extension, coupled with the new sqldiff utility, might be
of interest too.--DD
[1] http://www.sqlite.org/rbu.html
So can someone give me a working example of two database ATTACHed and a
simple select using columns from a table in each database
On 13 August 2015 at 07:13, Chris Parsonson wrote:
> Now we get down to the first real problem that of the ATTACH. I have never
> been able to get that to work. If I
Now we get down to the first real problem that of the ATTACH. I have never
been able to get that to work. If I could have got the ATTACH to work I
probably would never have had to ask the synchronisation question. Although
I have never had to do it before in SQLite, I have worked a lot with SQL
The tables are very simple. They have a primary key, but no relationship
between tables in the sense that you mean. Synchronisation will be add new
rows, and update some rows, no deletions
On 13 August 2015 at 05:53, Simon Slavin wrote:
>
> On 13 Aug 2015, at 3:52am, Chris Parsonson wrote:
>
>
On 13 Aug 2015, at 5:55am, Chris Parsonson wrote:
> The tables are very simple. They have a primary key, but no relationship
> between tables in the sense that you mean. Synchronisation will be add new
> rows, and update some rows, no deletions
To access two different databases with one
On 13 Aug 2015, at 3:52am, Chris Parsonson wrote:
> I need to be able to synchronise some fairly simple table in two databases.
Are both copies of a table being changed between synchronisations ? Are the
changes just the adding of new rows, or do you sometimes delete or update rows ?
Is the
Hi SQLite people,
I need to be able to synchronise some fairly simple table in two databases.
Can someone help please
Regards,
Chris
--
Chris Parsonson
083 777 9261
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