"Lowder, Brady M." <[EMAIL PROTECTED]> wrote:
> Group,
>
> Compiling with -DSQLITE_DEBUG=1 has performance impacts as it adds =
> other
> debug capability that we may not need. I noticed that there is also a
> define called SQLITE_OMIT_EXPLAIN in the source code. Is it possible to
> just set that
Regarding: "...I believe my only option is to attach databases one at a
time,..."
I can't say I know enough of your system to be sure, but keeping each
subject's data in a separate database may not serve you well in the long
run.
Since I would suspect you will want to do various searches that
Group,
Compiling with -DSQLITE_DEBUG=1 has performance impacts as it adds other
debug capability that we may not need. I noticed that there is also a
define called SQLITE_OMIT_EXPLAIN in the source code. Is it possible to
just set that define properly (I assume to undefine it or perhaps set it
to
Make several large DBs as your input in that case and do -
select from DB1
select from DB2
...
select from DBn
insert into output
Serena Lien wrote:
No, I am not copying anything to an in-memory database, this was just an
alternative option I was suggesting, so please ignore the
No, I am not copying anything to an in-memory database, this was just an
alternative option I was suggesting, so please ignore the whole in-memory
database thing from now on..
I have more databases to attach than the maximum number allowed, so no, I
cannot attach my input databases to make one
It's only a structural problem, but the name "Cursor" is used
in the mac environment, and so sqlite's "Cursor" struct causes
conflicts.
It would be handy if the name changed, say to SQCursor
-
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Martin Pfeifle <[EMAIL PROTECTED]> wrote:
> Hi,
> is it possible to use UTF-16 access functionsa, e.g. sqlite3_bind_text16 or
> sqlite3_column_text16,
> together with a UTF-8 database?
>
> Do I get a byte identical UTF-8 database file if I write data to the database
> using sqlite3_bind_text16
Serena Lien wrote:
Thanks for the response.
-- 1 Gbyte is not at all too big for Sqlite to handle in one file.
True, but I think too big for an in-memory database - I was considering
copying all my source data from separate databases into one table in an
in-memory database so that I could
Hrm... I didn't realize that #define was limited to values less than
32. That being the case, you probably can't avoid starting multiple
transactions.
-Tom
> -Original Message-
> From: Serena Lien [mailto:[EMAIL PROTECTED]
> Sent: Wednesday, October 04, 2006 9:57 AM
> To:
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
>
> "Shields, Daniel" <[EMAIL PROTECTED]> wrote:
> > Does anyone know the maximum length of the filename passed to
> > sqlite_open. We seem to see truncation on long file names (> 32
> > chars?)
> >
>
> The SQLite core has a filename size
Shields, Daniel wrote:
Does anyone know the maximum length of the filename passed
to sqlite_open. We seem to see truncation on long file names
(> 32 chars?)
It's platform dependent and you didn't say which platform, so ... it'll
be about whatever MAX_PATH or similar is on your platform. ;)
Hello drh,
Wednesday, October 4, 2006, 10:00:38 AM, you wrote:
dhc> "Shields, Daniel" <[EMAIL PROTECTED]> wrote:
>> Does anyone know the maximum length of the filename passed
>> to sqlite_open. We seem to see truncation on long file names
>> (> 32 chars?)
>>
dhc> The SQLite core has a filename
Thanks for the response.
-- 1 Gbyte is not at all too big for Sqlite to handle in one file.
True, but I think too big for an in-memory database - I was considering
copying all my source data from separate databases into one table in an
in-memory database so that I could access it easier later.
"Shields, Daniel" <[EMAIL PROTECTED]> wrote:
> Does anyone know the maximum length of the filename passed
> to sqlite_open. We seem to see truncation on long file names
> (> 32 chars?)
>
The SQLite core has a filename size limit of around 500MB -
not something you are likely to ever hit. The
Yes, I could indeed determine which databases I want to attach to, but there
is a limit to the number of databases you can attach (I think it's 32?) and
I might have more than that. So I thought the safer route was to attach as I
go..
Serena.
On 10/4/06, Tom Briggs <[EMAIL PROTECTED]> wrote:
Hi,
is it possible to use UTF-16 access functionsa, e.g. sqlite3_bind_text16 or
sqlite3_column_text16,
together with a UTF-8 database?
Do I get a byte identical UTF-8 database file if I write data to the database
using sqlite3_bind_text16 and if I use
sqlite3_bind_text?
Best Martin
Do you know all of the databases that you want to attach to at the
start of processing? If so, there's no reason you can't simply attach
them all beforehand, start your transaction, and complete all your
processing. If you have to decide dynamically, based on the data, which
databases you'll
Hi Serena,
I hope that more expert users will chime in here, but my initial thoughts
were:
-- 1 Gbyte is not at all too big for Sqlite to handle in one file.
-- Some portion (large??) of the performance advantages of transactions will
be lost in opening/closing files, even if transactions were
Does anyone know the maximum length of the filename passed
to sqlite_open. We seem to see truncation on long file names
(> 32 chars?)
Thanks,
Daniel.
==
Please access the attached hyperlink for an important electronic
Hello,
I have many databases, all in separate files. I want to choose a subset of
them
based on some query, and read the input data one at a time, process it
somehow
and write the results to another database file.
The problems are caused by:
- May have a large number of inputs (eg > 32
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