Re: [sqlite] System function with Sqlite
> that seems wrong, for those which are symlinks (ie. 0->6) can you also > readlink and print that out too please? > > it seems like some fd's are beinh held open > > as a work around you can loop over these fd's (say 2 though 255) and > set FD_CLOEXEC (lots of things do this, it's a but of a hack and not > entirely reliable) I repeated the test and ran readlink for each fd as you suggested. Here are the results before SQLite: . .. 0 /dev/console1 ¶g¤T 1¤ë 2 04:54:50 CST 2008 1 /dev/console1 ¶g¤T 1¤ë 2 04:54:50 CST 2008 2 /dev/console1 ¶g¤T 1¤ë 2 04:54:50 CST 2008 3 /proc/130/fd1 ¶g¤T 1¤ë 2 04:54:50 CST 2008 After SQLite: . /proc/130/fd1 ¶g¤T 1¤ë 2 04:54:50 CST 2008 .. /proc/130/fd1 ¶g¤T 1¤ë 2 04:54:50 CST 2008 0 /dev/console1 ¶g¤T 1¤ë 2 04:54:50 CST 2008 1 /dev/console1 ¶g¤T 1¤ë 2 04:54:50 CST 2008 2 /dev/console1 ¶g¤T 1¤ë 2 04:54:50 CST 2008 3 /proc/130/fd1 ¶g¤T 1¤ë 2 04:54:50 CST 2008 5 pipe:[120]fd1 ¶g¤T 1¤ë 2 04:54:50 CST 2008 6 pipe:[120]fd1 ¶g¤T 1¤ë 2 04:54:50 CST 2008 I am still relatively new to Linux so some of the commands you mentioned are unfamiliar to me. I hope this output is what you wanted. Could you explain how I can set FD_CLOEXEC? If its unreliable then I really can't use it permanently but it may be a useful test to run. Thanks Chris ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] System function with Sqlite
Again, for what it's worth: I'm using gcc 4.1.3 and I've successfully run this as myself, using sudo, and as root. While I realize we're not talking Windoze, have you tried rebooting, recompling, and rerunning it? > Hi Peter- Yes I'm running the code as you've put above and I used the full > source tree also. Its quite frustrating as to why I'm getting this strange > behaviour on my system. I accept that Sqlite may not be directly responsible > but the act of running it on my system is having an affect for some reason. ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] SQL error: disk I/O error, for attached DBs on power PC
Hi! All, After using strace, we found the root cause. SQLite will use some temporary files to keep the select (with union all) result. See: http://www.sqlite.org/tempfiles.html In our system, we allocated 32M for /, and there are only 19M after booting up the system. SQLite can not get enough space for the temporary files (strace shows "write error: space is not enough") After adding a compiling configuration -DSQLITE_TEMP_STORE=3 to SQLIte's Makefile, we can finish this job. http://www.sqlite.org/compile.html#temp_store Also, we can change the location of the temporary files to solve this issue. France Hsu wrote: > Hi! All, > > We recently got an error "Disk I/O error" while using the select > command on attached DBs. > These DBs have same table format > We only execute select, insert, and attach commands > > The environment is as follows: > SQLite: V3.5.6 > OS: Linux 2.6.24.2 > Platform Power PC (MPC8543) > Memory: 256M > DB Location: SATA hard drive, within a 512-maga-byte partition > > The error is happened when the size of one DB file is larger than 10M, > Ex: > -rw-r--r--1 root root 10600448 Aug 1 14:38 system_log-07.db > -rw-r--r--1 root root27648 Aug 7 22:18 system_log-08.db > > ./sqlite3 system_log-08.db > sqlite> attach ''system_log-07.db' as db1; > sqlite> select * from main.disk_log union all select * from > db1.disk_log order by timestamp desc; > SQL error: disk I/O error > > Available partition size: 467.2M > Sometimes I executed the command "select count(*) ..." successfully, > but sometimes failed. > The total number of the result is about 15. > Sometimes I executed the command "select * ... limit 0, 3" > successfully, but sometimes failed. > As observing top when executing sqlite, the available memory is enough > (about 120-140M). > > Would you provide some comments or some solutions? > Thank you all very much. > -- Best Regards, France Hsu ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] System function with Sqlite
What does strace reveal? -- -- 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
Re: [sqlite] System function with Sqlite
> #include "sqlite3.h"
>
> main(int argc, char **argv)
> {
> static sqlite3 *db;
>
> system("whoami");
> sqlite3_open("junk.dbs", );
> sqlite3_close(db);
> system("whoami");
> }
>
> Works fine on mine, Chris. FWIW I did use the full source tree (the
> .tar.gz file) for compilation and install of sqlite3.5.9
>
Hi Peter- Yes I'm running the code as you've put above and I used the full
source tree also. Its quite frustrating as to why I'm getting this strange
behaviour on my system. I accept that Sqlite may not be directly responsible
but the act of running it on my system is having an affect for some reason.
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Re: [sqlite] [Delphi] ANSI characters turned into Unicode?
On Wed, 13 Aug 2008 14:24:25 -0400, "Igor Tandetnik" <[EMAIL PROTECTED]> wrote: >This does look like UTF-8 encoded string - misinterpreted to be in >Latin-1 codepage. Indeed, the wrapper uses UTF8 by default. Setting it to Standard solved the issue. Thanks. ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] System function with Sqlite
> before the system calls can you make a fucntion that does a > open/readdir of /proc/self/fd/ and prints the results (to compare > before and after)? Hi Chris- I did as you suggested and I had the following returned before sqlite3_openis called: . .. 0 1 2 3 Then this after sqlite3_close but before the second call to system: . .. 0 1 2 3 5 6 Thanks Chris ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] RTree query
I have two tables with about 100 000 rows. One is the main data table and the other an RTree table. I started a query like described at http://www.sqlite.org/rtree.html: SELECT data.location_name FROM data, rtree WHERE data.id=rtree.id AND rtree.x >= 0 AND rtree.x <= 10; This runs for about 4 secs. When using this query: SELECT location_name FROM data WHERE id IN (SELECT id FROM rtree WHERE rtree.x >= 0 AND rtree.x <= 10); the result is available after less than 0.4 s. This time I expected also for the first query but it seems to be that something is going wrong overthere (the index for the ID does not seem to be used or something similar). I had a look at the command using "explain" but I am not an expert for the VDBE instructions. Any ideas? Hartwig FYI: the rtree query by itself returns less than 50 rows. FYI: I am using sqlite3 version 3.6.1 ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] setting a foreign key in a trigger
Thanks for the responses. This sounds like just what I will need. --Bruce ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] [Delphi] ANSI characters turned into Unicode?
Gilles Ganault <[EMAIL PROTECTED]> wrote: > Using Aducom's free wrapper for Delphi, when > using accents in a field, they're turned into (I assume) Unicode: > > déjà vu, caché, voilà -> déjà vu, caché, voilà ! This does look like UTF-8 encoded string - misinterpreted to be in Latin-1 codepage. > To be able to tell if it's the wrapper or SQLite > itself, is there a function I should call when > using accented characters, or does SQLite not care a bit? SQLite accepts (and returns) strings in either UTF-8 or UTF-16 encoding. If you have a string in any other encoding, you would have to convert it to one of those before passing it to SQLite (and convert back when retrieving from SQLite). Igor Tandetnik ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] [Delphi] ANSI characters turned into Unicode?
Hello Using Aducom's free wrapper for Delphi, when using accents in a field, they're turned into (I assume) Unicode: déjà vu, caché, voilà -> déjà vu, caché, voilà ! To be able to tell if it's the wrapper or SQLite itself, is there a function I should call when using accented characters, or does SQLite not care a bit? Thank you. ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] "unable to open database file" on DROP
D. Richard Hipp wrote: > > (2) Formal and detail requirements that define precisely what SQLite > does. > > http://www.sqlite.org/draft/tokenreq.html > http://www.sqlite.org/draft/syntax.html > These look great. I noticed a few typos, but on the whole they are very good. I noticed that in many places you specify that sqlite will fail with an error, but you do not specify what the error will be (i.e. the error code and or message isn't specified). Perhaps these details should be added. BTW, have you noticed how much closer these documents are to the style of the SQL standard than your previous, less formal and more more ambiguous, documents were? :-) > > (6) New test harnesses and requirements-based test cases that give > 100% branch coverage and that can be run on embedded systems. > Will this test system be written in C instead of TCL to make it portable to a wider variety of system? Dennis Cote ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] System function with Sqlite
#include "sqlite3.h"
main(int argc, char **argv)
{
static sqlite3 *db;
system("whoami");
sqlite3_open("junk.dbs", );
sqlite3_close(db);
system("whoami");
}
Works fine on mine, Chris. FWIW I did use the full source tree (the
.tar.gz file) for compilation and install of sqlite3.5.9
Chris Brown wrote:
>> The "fossil" configuration management system (used to control the
>> documentation of SQLite - see http://www.fossil-scm.org/ for details
>> and http://www.sqlite.org/docsrc/timeline for an example) calls
>> system() after sqlite3_open() in multiple places and it works just
>> fine on Linux, OSX, various other flavors of unix, and even win32.
>> Are you sure that SQLite is to blame here?
>
> No I couldn't be 100% certain that SQLite is to blame but I have stripped
> out all other code to do the following and it hangs on the second system
> call:
>
> system("whoami");
> sqlite3_open("/bin/test/testdb", );
> sqlite3_close(db);
> system("whoami");
>
> I have checked the return value of sqlite3_open and it is zero. If I remove
> the calls to sqlite3_open and sqlite3_close then both system calls complete
> correctly.
>
> I also tried Peter's suggestion but that didn't have any affect either.
>
> Chris
>
>
>
> ___
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>
>
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Re: [sqlite] System function with Sqlite
On Wed, Aug 13, 2008 at 05:08:26PM +1200, Chris Brown wrote: > At the moment I can replicate this issue simply by having the code > sample in my previous post inside my main function with the sqlite > database variable declaration and thats it. before the system calls can you make a fucntion that does a open/readdir of /proc/self/fd/ and prints the results (to compare before and after)? ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
