Re: [sqlite] newbie question
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Listman wrote: > anyone see a problem with us piggy backing on the svn sqlite > client install? You should be asking the Subversion folks. I'd assume they would want you to ensure your tables have their own namespace prefix. You will also want to find out if they ever wipe the database. Finally make sure your code doesn't leave open transactions for long periods of time as SQLite can only have one transaction open for writing at a time, blocking/queuing others wanting to write. Roger -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFI9C1emOOfHg372QQRAqI/AKDQy/vYYBGrIYHZYNuCH6SauBCbMQCgyOP6 aAq+aGisFbGOiLI3VNIeYG4= =Igho -END PGP SIGNATURE- ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] SQLITE_STATIC and bind*()
> > Sqlite3_bind_text(Statement, S.c_str(), S.size() + 1, > > SQLITE_[TRANSIENT | STATIC?]); > > Drop +1. It's unlikely that you actually want terminating NUL to be > part > of the string in the database. > Sorry, mixed that one with the nByte parameter of prepare_v2. It's "-1" in code though, so my program shouldn't exhibit a problem. I wrote the snippet in this email on the fly :). > > Is SQLITE_STATIC suitable for this situation? > > Yes, as long as "use statement" part involves calling sqlite3_reset or > sqlite3_finalize on Statement. So no accesses happen after a finalize or reset, perfect :). Thanks a lot for the help. - Sherief ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] SQLITE_STATIC and bind*()
"Sherief N. Farouk" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED] > Does the bind text family attempt to access the data pointed to by the > passed parameter after the lifetime of the function call? Yes, unless you pass SQLITE_TRANSIENT flag. > Sqlite3_bind_text(Statement, S.c_str(), S.size() + 1, > SQLITE_[TRANSIENT | STATIC?]); Drop +1. It's unlikely that you actually want terminating NUL to be part of the string in the database. > //use statement > > } > > Is SQLITE_STATIC suitable for this situation? Yes, as long as "use statement" part involves calling sqlite3_reset or sqlite3_finalize on Statement. Igor Tandetnik ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] newbie question
hi, the SCM tool Subversion is going to start using sqlite in the upcoming 1.6 release to manage client metadata. would it be possible for us to also that sqlite install as part of some custom code we write around subversion? we'd like to be able to cache the list of managed object in the working copy with sqlite rather than require an "svn ls" or "svn info" every time we want to interact with that object. anyone see a problem with us piggy backing on the svn sqlite client install? TIA ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] SQLITE_STATIC and bind*()
Does the bind text family attempt to access the data pointed to by the
passed parameter after the lifetime of the function call? I have a situation
similar to the following:
Std::string S("Blah");
foo(S);
Rest_of_program();
Where foo() is:
Void foo(string& S)
{
//prepare a statement
Sqlite3_bind_text(Statement, S.c_str(), S.size() + 1, SQLITE_[TRANSIENT |
STATIC?]);
//use statement
}
Is SQLITE_STATIC suitable for this situation? The string S is guaranteed to
be "alive" until foo returns, but not afterwards. If S was terminated after
the call to foo(), is my program well formed or do I need to use
SQLITE_TRANSIENT?
- Sherief
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Re: [sqlite] Joining 2 views
Hi P, well I tried to put all the business logic out of my program and into views. Basically all my program does is feed data into tables that are created for dynamic data and are cleaned before each import. Once the import is finished my app then selects from those views. Those views use each other and for as long they do not join each other everything is fine. I did not want to use Temp tables because AFAIK I need to create and drop them programmitcally and that means that I have to put part of the business logic back into my app, which I had hoped to avoid. Before using sqlite I had used Access for that, which seems so index even views, but at some point access threw unexpected errors when I then tried to access those views of views via odbc, why I don't now but that's when I switched to sqlite and this problem came up. Best regards Guenther P Kishor schrieb: > On 10/13/08, Guenther Schmidt <[EMAIL PROTECTED]> wrote: > >> Hi P, >> >> thanks, I had considered that. >> >> Hope there is another solution though. >> > > possibly, but how about enlightening others as to why you considered > creating temp tables and then decided not to do so? > > In fact, how about explaining in an email all the things that you have > considered, tried and rejected so others may learn from it? > > > >> Günther >> >> P Kishor schrieb: >> On 10/13/08, Guenther Schmidt <[EMAIL PROTECTED]> wrote: >> >> >> Hi, >> >> unfortunately I've hit a point where I run a query where one VIEW joins >> another VIEW. >> >> Both views are rather large and since there is no index on the fields >> where they join the query takes very very long. (About 15 min). >> >> Does anybody here know a solution to this problem? >> >> create temporary tables with the views, possibly index these temp >> tables, then query that table. >> >> >> >> Best regards >> >> Günther >> >> ___ >> sqlite-users mailing list >> sqlite-users@sqlite.org >> http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users >> >> >> >> >> >> >> > > > ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Joining 2 views
On 10/13/08, Guenther Schmidt <[EMAIL PROTECTED]> wrote: > > Hi P, > > thanks, I had considered that. > > Hope there is another solution though. possibly, but how about enlightening others as to why you considered creating temp tables and then decided not to do so? In fact, how about explaining in an email all the things that you have considered, tried and rejected so others may learn from it? > > Günther > > P Kishor schrieb: > On 10/13/08, Guenther Schmidt <[EMAIL PROTECTED]> wrote: > > > Hi, > > unfortunately I've hit a point where I run a query where one VIEW joins > another VIEW. > > Both views are rather large and since there is no index on the fields > where they join the query takes very very long. (About 15 min). > > Does anybody here know a solution to this problem? > > create temporary tables with the views, possibly index these temp > tables, then query that table. > > > > Best regards > > Günther > > ___ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > > > > > > -- Puneet Kishor http://punkish.eidesis.org/ Nelson Institute for Environmental Studies http://www.nelson.wisc.edu/ Open Source Geospatial Foundation (OSGeo) http://www.osgeo.org/ ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Joining 2 views
Hi P, thanks, I had considered that. Hope there is another solution though. Günther P Kishor schrieb: > On 10/13/08, Guenther Schmidt <[EMAIL PROTECTED]> wrote: > >> Hi, >> >> unfortunately I've hit a point where I run a query where one VIEW joins >> another VIEW. >> >> Both views are rather large and since there is no index on the fields >> where they join the query takes very very long. (About 15 min). >> >> Does anybody here know a solution to this problem? >> > > create temporary tables with the views, possibly index these temp > tables, then query that table. > > >> Best regards >> >> Günther >> >> ___ >> sqlite-users mailing list >> sqlite-users@sqlite.org >> http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users >> >> > > > ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Joining 2 views
On 10/13/08, Guenther Schmidt <[EMAIL PROTECTED]> wrote: > Hi, > > unfortunately I've hit a point where I run a query where one VIEW joins > another VIEW. > > Both views are rather large and since there is no index on the fields > where they join the query takes very very long. (About 15 min). > > Does anybody here know a solution to this problem? create temporary tables with the views, possibly index these temp tables, then query that table. > > Best regards > > Günther > > ___ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > -- Puneet Kishor http://punkish.eidesis.org/ Nelson Institute for Environmental Studies http://www.nelson.wisc.edu/ Open Source Geospatial Foundation (OSGeo) http://www.osgeo.org/ ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Joining 2 views
Hi, unfortunately I've hit a point where I run a query where one VIEW joins another VIEW. Both views are rather large and since there is no index on the fields where they join the query takes very very long. (About 15 min). Does anybody here know a solution to this problem? Best regards Günther ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] sqlite3_open() problem
Leandro dos Santos Ribeiro wrote: > D. Richard Hipp wrote: > >> On Oct 10, 2008, at 4:59 PM, <[EMAIL PROTECTED]> <[EMAIL PROTECTED] >> > wrote: >> >> >> >>> Hello Team. >>> >>> I have a problem with running SQLite. >>> I am running linux 2.6.17 on *ARM* and basically problem is that my >>> application >>> is crushing on *sqlite3_open*() function while the sqlite3 command >>> shell is >>> running without problems. >>> >>> >> The command-line shell uses sqlite3_open() too. So if it works there, >> I do not understand why it is not working in your program. Have you >> run your program in a debugger to see exactly where it is crashing? >> >> >> >> D. Richard Hipp >> [EMAIL PROTECTED] >> >> >> >> ___ >> sqlite-users mailing list >> sqlite-users@sqlite.org >> http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users >> >> >> > Hello D. Richard Hipp, > > Yes, I did run the program in a debugger and it is crashing when the > program tries to execute the sqlite3_open() function. > It seems that I'm not the only one with that problem, but I didn't find > the answer yet. > Thanks . > > > Best regards. > > Leandro S. Ribeiro > ___ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > > Hello everybody, I found the problem with the sqlite3_open() crashing. To solve it I just added the libs libpthread and libdl to my project. Thanks to all. Best regards Leandro S. Ribeiro ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Intermittent SQLITE_CANTOPEN on Windows
Stephen Oberholtzer wrote: On Mon, Oct 13, 2008 at 12:52 PM, Doug <[EMAIL PROTECTED]> wrote: I'm using SQLite 3.5.6 on Windows and intermittently get SQLITE_CANTOPEN when doing an insert. When that fails, I can use the debugger to go back up and step through the same lines again (using the same database handle - nothing opened or closed in between) and it will work. We see this a lot when people have an antivirus that autoscans files after they've been modified. Is that possibly the case? System Restore also tends to interfere a lot when one chooses filenames with extensions that are monitored by that service (especially .sdb which is very tempting when using SQLite, but is the extension used by the shim engine.) Here is a list of extensions to avoid: http://msdn.microsoft.com/en-us/library/aa378870.aspx. ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Intermittent SQLITE_CANTOPEN on Windows
On Mon, Oct 13, 2008 at 12:52 PM, Doug <[EMAIL PROTECTED]> wrote: > I'm using SQLite 3.5.6 on Windows and intermittently get SQLITE_CANTOPEN > when doing an insert. When that fails, I can use the debugger to go back > up > and step through the same lines again (using the same database handle - > nothing opened or closed in between) and it will work. > We see this a lot when people have an antivirus that autoscans files after they've been modified. Is that possibly the case? -- -- Stevie-O Real programmers use COPY CON PROGRAM.EXE ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Intermittent SQLITE_CANTOPEN on Windows
I'm using SQLite 3.5.6 on Windows and intermittently get SQLITE_CANTOPEN
when doing an insert. When that fails, I can use the debugger to go back up
and step through the same lines again (using the same database handle -
nothing opened or closed in between) and it will work.
I am using sqlite3_bind_blob with the following: INSERT OR REPLACE INTO
BlobTable (BlobKey, BlobVal) Values ('exampleKey', ?)
in case that makes any difference (the SQLITE_CANTOPEN code is returned from
sqlite3_step).
I doubt this has anything to do with SQLite as it's been working perfectly
for years, but I also can't figure out what has changed on my system such
that this would be happening now.
Thanks in advance for any ideas.
Doug
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Re: [sqlite] sqlite3_open() problem
D. Richard Hipp wrote: > On Oct 10, 2008, at 4:59 PM, <[EMAIL PROTECTED]> <[EMAIL PROTECTED] > > wrote: > > >> Hello Team. >> >> I have a problem with running SQLite. >> I am running linux 2.6.17 on *ARM* and basically problem is that my >> application >> is crushing on *sqlite3_open*() function while the sqlite3 command >> shell is >> running without problems. >> > > The command-line shell uses sqlite3_open() too. So if it works there, > I do not understand why it is not working in your program. Have you > run your program in a debugger to see exactly where it is crashing? > > > > D. Richard Hipp > [EMAIL PROTECTED] > > > > ___ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > > Hello D. Richard Hipp, Yes, I did run the program in a debugger and it is crashing when the program tries to execute the sqlite3_open() function. It seems that I'm not the only one with that problem, but I didn't find the answer yet. Thanks . Best regards. Leandro S. Ribeiro ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Testing for existence of extension
Hi, I am a happy user of FTS3 and want to rely on this functionality in my program which hopefully will be used on a variety of systems. Now I found out that it wouldn't even run on a up to date Ubuntu, at least two bug reports are pending. Now that FTS3 will only be optionally available, which is fine for me, I would like to gracefully degrade when the extension is not found. Just how to find out about it? As I read, it can either be compiled in, or plugged into the system, the second solution obviously requesting my system to take care of this as I understand. How can I find out if and how it is available to me? I checked both website (and wiki) and mailing list, but can't find help on checking for the existence of a plugin, nor about compiled-in options. Help appreciated, Christoph Burgmer ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] from access to sqlite
"Fabio Stranieri" <[EMAIL PROTECTED]> schrieb im Newsbeitrag news:[EMAIL PROTECTED] > "'11/10/2008 00:00:00'" As I see it, there's no need, to hardcode your Dates this way. You can use an appropriate Format-String to retrieve that directly from VB-DateVariables: Format(now,"'dd\/mm\/ hh:mm:ss'") > That said, i have solved my problem, but i'm like to > understand why it no work with datetime format. It has solved your problem, because you imported the dates as text - and as I see it, the Date-String-Format you currently use is not really sortable or "comparable" as other Date-String-Formats, which normally need to begin with the year, followed by the month and day. Your current order is days, months, year inside your imported date-strings and that will cause problems with sorting, has "internationalization-issues" etc. So I'd strongly recommend, that you either change your self-defined Text-Date-imports to a "standard SQL-String-date" (starting with the year) or that you try to make it work with your original wrapper-providers datetime-format. Please ask their tec-support or read their docu on date- columns/date-imports from MS-DBs. And regarding your problems with STRFTIME - this is not a VB-Function - you would have to place it as Text in your Query-String. Olaf ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] from access to sqlite
"Toby Bascom" <[EMAIL PROTECTED]> schrieb im Newsbeitrag news:[EMAIL PROTECTED] > Olaf is, in a word, a genius! Heh, don't make me blush here, especially in this group, where the real DB-experts hang around... Without the sqlite-engine my wrapper wouldn't exist. I'd suggest the groups on the public MS-NewsServer (msnews.microsoft.com) for all these questions which target more the VB-(respective the COM-wrapper-) side of SQLite: microsoft.public.vb.database microsoft.public.vb.database.ado or even microsoft.public.vb.general.discussion > Try adding single quotation marks around the 2 date variables: That's already ensured in the Format-String. Format(VBDateVariable, "'-mm-dd hh:nn:ss'") > dhRichClient = End of 20MB ADO desktop installations!! Thanks, but as said - without that great engine under the hood, it wouldn't have been possible. Olaf ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
