On Aug 30, 2010, at 12:22 PM, Benoit Mortgat wrote:
Hello,
The following table creation fails under latest release :
CREATE VIRTUAL TABLE foo USING FTS3
(
bar TEXT, othercolumns TEXT,
CHECK(1), CHECK(1)
);
Error message: vtable constructor failed
Maybe it thinks the two CHECK(1)
The 1 expression was here only for simplification, but it also fails to run
the statement whatever expressions are specified.
Thank you for your answer. I now am aware that checks must be done by the
upper-level application.
Benoit
On Mon, Aug 30, 2010 at 08:19, Dan Kennedy
Hi
I have a Sqlite db on an embedded device on which there are
inserts happening at a rate of 1 insert every 3 seconds. That
being the case if Sqlite does file close/sync every 3 seconds
it is going to wear off the NAND in no time. I tried to instead
put 2 mins worth of inserts inside a
Can you keep your database in-memory and just copy it to your flash
periodically? That would give you the most control and minimize the # of
writes as much as you want. It's good you recognize that you'll burn your
flash out quickly with what you're doing now.
There's also the
That is *EXACTLY* what I'm reffering to. Is there any design info,
rationale or pointers to what changes were made, and why the switch from a
stack to register machine?? Also, is there any performance data?
There's a video where D. Richard Hipp talks about sqlite (interesting in
many other
Use WAL mode. Set PRAGMA synchronous=NORMAL. Do transactions that last 2
minutes each, starting a new transaction after each COMMIT. Run checkpoints
in a background thread.
On Mon, Aug 30, 2010 at 6:29 AM, Pankaj Chawla pankaj...@gmail.com wrote:
Hi
I have a Sqlite db on an embedded device
HI Michael,
Thanks for the reply. Wont keeping things in memory lead to chances of
db getting corrupt especially in cases of power failure or device reboots.
I am not sure but since Sqlite is now used so frequently in embedded devices
and most devices use flash memories how are these situations
WAL mode still writes the journal to disk.
Perhaps combining this with SQLITE_TEMP_STORE=3 would be the best of all worlds?
Then his current situation of writing a 2-minute transaction should work just
fine and minimize the # of writes.
Michael D. Black
Senior Scientist
Advanced
Well...yeh...but you were complaining about the logs being written to your
flash...you gotta' pick your poison.
If you keep only the temporary files in memory you should be OK. That's what
the compilation flag is for.
Keeping your entire database in memory is probably on an option if it's
Hi Everyone,
I am using sqlite3 with python2.5 and the pysqlite wrapper. I am trying
to copy tables from one database (in memory) to another database (file)
using ATTACH. I looked on the internet and found a couple of sites that show
how to do this but the table schema is not copied.
def
Hi all,
How does one find the next value of a serial item? Given a simple
table with a serial primary key, I'd like to get the next available
integer key value. eg:
CREATE TABLE foo (
foo_id SERIAL PRIMARY KEY,
nametext
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