Re: [sqlite] HELP sqlite3 used in vxworks has someproblem?

2014-08-13 Thread Andy Ling
If your build is frequently trying to unlink a file that does not exist, then something is wrong.  We need to figure out what that is and fix it. I have added some debug. First I create a brand new database called /ata0:3/testdb.sql Then I try and create a table and get an error from

Re: [sqlite] HELP sqlite3 used in vxworks has someproblem?

2014-08-13 Thread Andy Ling
-Original Message- From: sqlite-users-boun...@sqlite.org [mailto:sqlite-users- boun...@sqlite.org] On Behalf Of Andy Ling Sent: 13 August 2014 10:06 To: 'Richard Hipp' Cc: General Discussion of SQLite Database Subject: Re: [sqlite] HELP sqlite3 used in vxworks has someproblem?

[sqlite] use sqlite3 in ios

2014-08-13 Thread YAN HONG YE
When I add sqlite3.c and sqlite3.h to xcode ios cocoa project, and compiled, the error msg is: Sqlite3 class is not a objective class, who have any cocoa sqlite source, I don't know how to do. ___ sqlite-users mailing list sqlite-users@sqlite.org

Re: [sqlite] HELP sqlite3 used in vxworks has someproblem?

2014-08-13 Thread Richard Hipp
OK, I did find some cases where unlink() is called on files that do not exist. We must have added those within the past couple of years Anyway, a patch has now been checked in. On Wed, Aug 13, 2014 at 5:09 AM, Andy Ling andy.l...@quantel.com wrote: -Original Message- From:

Re: [sqlite] SQLite relative dates and join query help

2014-08-13 Thread Ben
Thanks for the advice everyone, I'd not considered the group by clause here. The following seems to work so far: SELECT items.id, items.prod_code, items.creation_date, collections.book_in_date as last_book_in_date, collections.collection_date as last_collection_date

[sqlite] setting journal_mode while in a transaction may behave strangely

2014-08-13 Thread Jean GIARD
Hi, I stumbled upon a bug in my code which looked like a wrong sqlite behavior. When simply using the begin - pragma journal_mode=wal - commit query sequence, sqlite return a proper error saying this is not allowed. However if I execute a command affecting the database structure (such as create

Re: [sqlite] HELP sqlite3 used in vxworks has someproblem ?

2014-08-13 Thread Dave Dyer
There's a class of errors that affect lots of programs, where backup and/or antivirus software have a file open unexpectedly, which causes routine operations such as delete and rename to fail unexpectedly. I once promoted a fix for sqlite that combatted these problems by retrying such

Re: [sqlite] HELP sqlite3 used in vxworks has someproblem ?

2014-08-13 Thread Dave Dyer
There's a class of errors that affect lots of programs, where backup and/or antivirus software have a file open unexpectedly, which causes routine operations such as delete and rename to fail unexpectedly. I once promoted a fix for sqlite that combatted these problems by retrying such

Re: [sqlite] setting journal_mode while in a transaction may behave strangely

2014-08-13 Thread Richard Hipp
On Tue, Aug 12, 2014 at 12:35 PM, Jean GIARD jgi...@antidot.net wrote: I know it's not a good behavior to have structure queries inside a transaction ... There is absolutely nothing wrong with doing DDL statements inside a transaction in SQLite. Other SQL database engines might have issues

Re: [sqlite] HELP sqlite3 used in vxworks has someproblem?

2014-08-13 Thread Andy Ling
From: drhsql...@gmail.com [mailto:drhsql...@gmail.com] On Behalf Of Richard Hipp Sent: 13 August 2014 12:40 To: Andy Ling Cc: General Discussion of SQLite Database Subject: Re: [sqlite] HELP sqlite3 used in vxworks has someproblem? OK, I did find some cases where unlink() is called on

Re: [sqlite] setting journal_mode while in a transaction may behave strangely

2014-08-13 Thread Jean GIARD
Alright, thank you for these precisions. On 08/13/2014 02:28 PM, Richard Hipp wrote: On Tue, Aug 12, 2014 at 12:35 PM, Jean GIARD jgi...@antidot.net wrote: I know it's not a good behavior to have structure queries inside a transaction ... There is absolutely nothing wrong with doing DDL

[sqlite] Avoiding content duplication when extracting results

2014-08-13 Thread Nathaniel Trellice
Dear list members, I'm trying to extract the results of a query that returns fairly large amounts of data (100-200Mb) as quickly as possible using the c/c++ api. Is there any way to avoid unnecessarily duplicating the data coming from the following functions?  const unsigned char

Re: [sqlite] Avoiding content duplication when extracting results

2014-08-13 Thread Roger Binns
On 13/08/14 06:25, Nathaniel Trellice wrote: Is there any way to avoid unnecessarily duplicating the data coming from the following functions? You will need to duplicate. You can use the memory allocation/copying scheme of your choice. I'm rather fond of the hierarchical/pool based ones like

Re: [sqlite] Avoiding content duplication when extracting results

2014-08-13 Thread Richard Hipp
On Wed, Aug 13, 2014 at 9:25 AM, Nathaniel Trellice napt...@yahoo.co.uk wrote: Dear list members, I'm trying to extract the results of a query that returns fairly large amounts of data (100-200Mb) as quickly as possible using the c/c++ api. Is there any way to avoid unnecessarily

Re: [sqlite] use sqlite3 in ios

2014-08-13 Thread Roger Binns
On 13/08/14 02:31, YAN HONG YE wrote: When I add sqlite3.c and sqlite3.h to xcode ios cocoa project, and compiled, the error msg is: Sqlite3 class is not a objective class, who have any cocoa sqlite source, I don't know how to do. iOS already includes SQLite as a shared library. Unless

Re: [sqlite] SQLite relative dates and join query help

2014-08-13 Thread Petite Abeille
On Aug 13, 2014, at 3:43 AM, Keith Medcalf kmedc...@dessus.com wrote: I don't think you want max() around collections.book_in_date. You want the max(collection_date) but the book_in_date from that row. Since the collection_date is unique, the book_in_date can only come from one record.

Re: [sqlite] use sqlite3 in ios

2014-08-13 Thread Ward Willats
On Aug 13, 2014, at 2:31 AM, YAN HONG YE yanhong...@mpsa.com wrote: When I add sqlite3.c and sqlite3.h to xcode ios cocoa project, and compiled, the error msg is: Sqlite3 class is not a objective class, who have any cocoa sqlite source, I don't know how to do. If you compile in a .mm