Re: [sqlite] MS open source Portable Class Library for SQLite
I would describe the msopentech PCL wrapper as slightly thick (because it's trying to be higher level than the sqlite3 API itself), and quite narrow (because it covers only a small part of the underlying sqlite3 API). Related and possibly of interest: My own C# wrapper is a fork of the one from msopentech. It's called SQLitePCL.raw. The README on the github page contains a bunch of info about my wrapper and its differences: https://github.com/ericsink/SQLitePCL.raw There are some NuGet packages: https://www.nuget.org/packages/SQLitePCL.raw_basic/ https://www.nuget.org/packages/SQLitePCL.raw_needy/ SQLitePCL.raw is currently being used by: The PCL version of the SQLite-net (a lightweight ORM by Frank Krueger) NuGet package: https://www.nuget.org/packages/sqlite-net-pcl/1.0.9-alpha And Akavache: https://github.com/akavache/Akavache And I've been trying to clear the obstacles so that SQLitePCL.raw could maybe be used by Entity Framework 7: https://github.com/aspnet/DataCommon.SQLite/issues/21 -- E On Thu, Aug 14, 2014 at 3:41 PM, Simon Slavin slav...@bigfraud.org wrote: On 14 Aug 2014, at 9:14pm, a...@zator.com wrote: May be that some know it already, but digging the Web to know about the client-side storage Web SQL Database, I've found this post of MS Open Technologies, that may be of interest to many of you who often ask about SQLite in Window Phone. http://msopentech.com/blog/2014/02/03/new-open-source-portable-class-library-sqlite/ Thanks for the news, Adolfo. Would someone familiar with programming for this platform tell use how thick or thin this wrapper is ? Simon. ___ 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] Cross-Platform ADO wrapper for iOS, Android and Win 8.1 WP 8.1?
Short answer: no. Longer answer: Microsoft does not (yet?) support ADO on WinRT or WP8, much less on Xamarin platforms. But it looks like the future holds a glimmer of hope. Their vNext project seems to be heading toward portable ADO, and also includes SQLite support: https://github.com/aspnet/DataCommon.SQLite -- E On Monday, August 11, 2014, Ken Wenyon weny...@msn.com wrote: Is there ADO Support for SQLite using Windows 8.1 and Windows Phone 8.1? I am looking for a Cross-Platform ADO wrapper for iOS, Android and Win 8.1 WP 8.1? Ken Wenyon ___ 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] SQLite version 3.8.6 coming soon
FWIW, the Zumero test suite is fairly abusive and it passes all test cases with 3.8.6 beta. -- E On Thu, Aug 7, 2014 at 11:59 AM, Richard Hipp d...@sqlite.org wrote: On Thu, Aug 7, 2014 at 10:01 AM, E.Pasma pasm...@concepts.nl wrote: I have a case where a primary key index is no longer used where it was used before. Thank you for the test case! This problem should now be addressed on trunk and in the pre-release snapshots. Please retry using the latest and let me know if you continue to see problems or if you see anything new. Thanks. -- D. Richard Hipp d...@sqlite.org ___ 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] SQLite3_create_collation
Does this mean all your interaction with SQLite is happening through Core Data? E On Apr 2, 2014 1:05 PM, Donald Steele xln...@sbcglobal.net wrote: I am working in iOS (aka ObjC) so I am using it's built in framework for all my SQLite calls. On Apr 2, 2014, at 10:58 AM, Simon Slavin slav...@bigfraud.org wrote: On 2 Apr 2014, at 6:56pm, Donald Steele xln...@sbcglobal.net wrote: Registering of the custom collation is far from intuitive (for me) and thus the reason for my question. What programming language is your collation function written in ? How are you calling your SQLite functions ? Are you doing C calls to the C API, or are you calling a SQLite library or framework from another language ? Simon. ___ 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 ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Should System.Data.SQLite.EF6.SQLiteProviderServices be public?
After reading this:
http://msdn.microsoft.com/en-us/data/jj680699.aspx
about Code-based Configuration in EF6, I wonder if
System.Data.SQLite.EF6.SQLiteProviderServices
needs to be public (instead of internal), so that people could do something
like this:
public class MyConfiguration : DbConfiguration
{
public MyConfiguration()
{
this.SetProviderServices(System.Data.SQLite,
System.Data.SQLite.EF6.SQLiteProviderServices.Instance);
}
}
--
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Re: [sqlite] to encrypt sqlite db
SQLCipher is free. But it's not compatible with WinRT. I'm pretty sure that right now there is nothing that meets both of your requirements. -- E On Aug 31, 2013, at 8:52 AM, dd durga.d...@gmail.com wrote: Thank you for your quick response. I am looking for freeware. If freeware not available, I have to implement encryption support for sqlite on winrt. What is the procedure to implement encryption support on winrt? Thanks, dd On Sat, Aug 31, 2013 at 6:34 PM, Stephan Beal sgb...@googlemail.com wrote: On Sat, Aug 31, 2013 at 2:59 PM, Mohit Sindhwani m...@onghu.com wrote: Adding on to Paolo's answer, see this: http://www.hwaci.com/sw/** sqlite/prosupport.html http://www.hwaci.com/sw/sqlite/prosupport.html See SEE and CEROD on that page. @devs: minor typo on that page: The SQLite software free and it works great. missing is -- - stephan beal http://wanderinghorse.net/home/stephan/ http://gplus.to/sgbeal ___ 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 ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] SQLite patch contribution
You could include us as another group who would like to see this functionality added to virtual tables. -- E On Jul 22, 2013, at 8:46 AM, Richard Hipp d...@sqlite.org wrote: On Mon, Jul 22, 2013 at 10:27 AM, Dušan Paulovič paulo...@gisoft.cz wrote: So, in other words, there is no way for programmers from EU to contribute on SQLite? Is there any other option? Is there a plan to solve xBestIndex collation issue? Actually implementing such a patch is trivial. We'll do that for you. Not a problem. The real work comes in (1) testing the new features (2) documenting the new feature, and especially (3) supporting the new feature moving forward. These three items, and especially the third item, involve orders of magnitude more time and effort than actually implementing the patch. So if having the ability to use collating sequences in virtual tables is something that is important to you, then you have to sell the idea. You have to convince the core team that your new feature is important and useful and ought to be supported. Submitting a proof of concept patch might be part of your sales pitch, as a way of showing that the feature is feasible and does not impact performance and will be easy to support. But the patch is only a small part of your sales pitch. You still need to convince the core team that what you are trying to do is necessary and important and will be of benefit to a large number of users. -- D. Richard Hipp d...@sqlite.org ___ 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] SQLite database on Dropbox, Google Drive, MS SkyDrive, Ubuntu One or SAMBA share
FYI: For a different approach, check out Zumero (http://zumero.com) which synchronizes SQLite changes within the db rather than the whole db as a file. Disclosure: I am a co-founder of Zumero, which is commercial, proprietary, non-open-source, etc. I mention this only because we often describe Zumero as like Dropbox, except for data instead of files, so it might be relevant for the participants of this thread. Apologies if this note is out of line. Feel free to ignore me. If your initials are DRH, feel free to scold me. -- E On Jul 3, 2013, at 9:27 AM, Gerry Snyder mesmerizer...@gmail.com wrote: On 6/27/2013 12:38 PM, joe.fis...@tanguaylab.com wrote: Anyone, Does anyone have good or bad experiences using a SQLite database in a shared folder? The 'Dropbox / Drive / SkyDrive / One' I use Dropbox for SQLite files a lot. If I am not careful to be making changes to a file on only one PC at a time, I can get a Conflicted copy on one of the machines, but by and large it has worked very well. I can not think of any way Dropbox could be handling things better. Gerry ___ 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
[sqlite] BEGIN IMMEDIATE and the busy handler
From reading sqlite3.c and the comments therein, it would appear that BEGIN IMMEDIATE TRANSACTION never invokes the busy handler. Is that correct? -- E ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] System.Data.SQLite and sqlite3_prepare()
It looks like System.Data.SQLite uses sqlite3_prepare() instead of sqlite3_prepare_v2(). Is there a technical reason for this? Just curious. -- E ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Announcing Zumero (commercial venture, built on SQLite)
I'll keep this short and low-key: Zumero is a sync solution for SQLite, designed for mobile devices. http://zumero.com/ Here's my blog post on it: http://ericsink.com/entries/announcing_zumero.html -- E ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] SQLite 3.7.16 beta
FWIW: I am working on a project which uses SQLite extensively. We generally use 3.7.11 on our client side and 3.7.15.2 on our server. I just switched both to this 3.7.16 beta, and all our automated tests still pass. -- E ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Maybe bug with vtab xDestroy
In xRename, if I set zErrMsg and return SQLITE_ERROR, the error message
gets through.
In xDestroy, using the same code, the error message seems to get eaten.
Bug?
My code:
static int my_Destroy(sqlite3_vtab *tab)
{
struct my_vtab* pvtab = (struct my_vtab*) tab;
if (pvtab-zErrMsg) sqlite3_free(pvtab-zErrMsg);
pvtab-zErrMsg = sqlite3_mprintf(whatever);
return SQLITE_ERROR;
}
This is with 3.7.15.2
--
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Re: [sqlite] Return Value from sqlite3_exec()
In your example, the only way SQLite can do what you expect is to notice that your UPDATE didn't modify any rows. But you don't want an UPDATE statement throwing errors simply because it didn't modify any rows. There are many situations where that happens and is considered normal behavior. UPDATE table1 SET site='Site1' WHERE site='garbage'; In your example, you know what garbage looks like. SQLite does not. Mere absence of that value from the column does not qualify it as garbage. OTOH, I do sometimes like to put this line (or something like it): assert(1 == sqlite3_changes(db)); after an UPDATE when I know that it should have changed exactly one row. -- E On 2/22/13 3:15 PM, Frederick Wasti wrote: [A newbie to SQLite here...] From the documentation on sqlite3_exec(), it seems as if it should return SQLITE_OK (=0) upon processing a successful SQL query. However, I was a bit surprised to see that an SQL statement such as UPDATE table1 SET site='Site1' WHERE site='garbage' (where garbage really is garbage, as in not being present in the database) results in an SQLITE_OK return. I guess there are two ways of looking at this: On the one hand, the SQL statement cannot succeed, so the return should not be SQLITE_OK. On the other hand, an SQL statement which would be impossible to process, but which would nonetheless be handled with aplomb by sqlite3_exec(), should return SQLITE_OK after all (in the sense that sqlite3_exec() did do its job OK). (???) So, my question is: Is it correct for sqlite3_exec() to return SQLITE_OK if the SQL query is doomed to failure (but is otherwise properly formed)? Thanks. Fred ___ 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
[sqlite] From SQLITE_CONSTRAINT to something more specific
I'm trying to use information from sqlite3_errmsg() to figure out what
*kind* of SQLITE_CONSTRAINT happened.
Cruising the archives of this mailing list, I see past discussions about
the desire for really complete error information, including the name of
the specific constraint that failed (and ideally in a format which does
not need to be parsed or is designed to be parsed). I add my vote for
how cool that functionality would be. For now, I'm just looking for a
way to distinguish between the major types of constraint violations,
(unique, check, foreign key, etc).
I would welcome remarks from the SQLite developers on the code snippet
below.
Specific questions:
(1) What is the likelihood of future changes to the phrasing of
sqlite3_errmsg() strings?
(2) Is there any situation where (0 == strcmp(sqlite3_errmsg(db),
constraint failed)) and the violation was NOT a CHECK constraint?
(3) Dare I hold out hope for extended error codes like the following?
#define SQLITE_CONSTRAINT_UNIQUE (SQLITE_CONSTRAINT | (18) )
#define SQLITE_CONSTRAINT_FOREIGN_KEY (SQLITE_CONSTRAINT | (28) )
#define SQLITE_CONSTRAINT_CHECK (SQLITE_CONSTRAINT | (38) )
#define SQLITE_CONSTRAINT_NOT_NULL(SQLITE_CONSTRAINT | (48) )
My code snippet:
if (SQLITE_CONSTRAINT == rc)
{
const char* psz_errmsg = sqlite3_errmsg(psql);
// We're on thin ice here. sqlite doesn't make any promises about
// what the errmsg string will contain for various constraint
violations.
// Nonetheless, this works. If sqlite changes the errmsgs in the
future,
// this will break. We've got test cases to detect this.
if (strstr(psz_errmsg, not unique))
{
// TODO should occur at the end of the string
...
}
else if (strstr(psz_errmsg, foreign key))
{
// TODO could check for exact strcmp match to foreign key
constraint failed
...
}
else if (strstr(psz_errmsg, constraint failed))
{
// TODO could check for exact strcmp match to constraint failed
// TODO riskiest one, since sqlite doesn't say it was a check
constraint
// TODO but it seems to use a more specific phrase in all other
cases except check constraints
...
}
}
Thanks!
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[sqlite] sqlite3_initialize() before sqlite3_randomness()
So it appears that if the very first SQLite function you call is sqlite3_randomness(), it crashes. And if you call sqlite3_initialize() first, it does not crash. Just thought I should let somebody know... -- E ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] sqlite3_initialize() before sqlite3_randomness()
Yeah, I did read that page, but not well enough. I saw this: Workstation applications using SQLite normally do not need to invoke either of these routines. And this (all-caps emphasis mine): The sqlite3_initialize() routine is called internally by MANY other SQLite interfaces so that an application usually does not need to invoke sqlite3_initialize() directly. But I missed this: it is recommended that applications always invoke sqlite3_initialize() directly prior to using any other SQLite interface So I ended up thinking maybe the current behavior was unknown or unintended. Anyway. Nothing to see here... -- E ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Two-line patch to fix memory leak
In sqlite3Fts3Matchinfo():
Near the end of the function, I added two lines:
if( rc!=SQLITE_OK ){
sqlite3_result_error_code(pContext, rc);
}else{
int n = pCsr-nMatchinfo * sizeof(u32);
sqlite3_result_blob(pContext, pCsr-aMatchinfo, n, SQLITE_TRANSIENT);
ADDED:sqlite3_free(pCsr-aMatchinfo);
ADDED: pCsr-aMatchinfo = 0;
}
Notes:
1. I added these two lines while obtaining zero actual understanding of
the internals of sqlite. Like a monkey typing random characters, I
opened vi and hit keys until the leak went away. I have no reason to
believe these lines are correct. All I know is that our test suite
shows some memory leaks unless these two lines are present.
2. I first did this fix back when 3.7.5 was released. And then I
procrastinated about submitting the patch to the mailing list, because I
wanted to wait until I could say something insightful about sqlite
internals, to make me look smarter than the aforementioned monkey.
Anyway, we've got over a year of experience running with sqlite 3.7.5
plus this patch, and no problems.
3. This week we upgraded to 3.7.11 and the leaks showed up again. So I
reapplied this little patch, and the leaks went away again. And this
time, I have decided not to let my cluelessness prevent me from letting
you folks know about it.
So, FWIW, there it is. :-)
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Re: [sqlite] Two-line patch to fix memory leak
Oh darn.
If the leak is not obvious to you, and if my patch would cause an undesirable
side effect, then the leak may somehow be the fault of our code.
I'll have to dig into this a bit further. Sending you our whole tree would be
somewhat less than constructive. Maybe I can narrow down to a small test case.
For now, I can confirm that we have made no other changes to our copy of 3.7.11.
Thanks,
--
E
On May 11, 2012, at 12:50 PM, Dan Kennedy danielk1...@gmail.com wrote:
On 05/11/2012 11:28 PM, Eric Sink wrote:
In sqlite3Fts3Matchinfo():
Near the end of the function, I added two lines:
if( rc!=SQLITE_OK ){
sqlite3_result_error_code(pContext, rc);
}else{
int n = pCsr-nMatchinfo * sizeof(u32);
sqlite3_result_blob(pContext, pCsr-aMatchinfo, n, SQLITE_TRANSIENT);
ADDED: sqlite3_free(pCsr-aMatchinfo);
ADDED: pCsr-aMatchinfo = 0;
}
Thanks for posting this.
Looking at the code, I can't see how the memory leak occurs. Do
you have any idea how to trigger it? Other than this patch, are
you using unmodified 3.7.11 FTS code?
We can't apply the patch as is, even though it is safe (does not
introduce any bugs), because it makes queries that use the 'x'
format specifier with matchinfo() much less efficient.
Dan.
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Re: [sqlite] Details on New Features
Is this new syntax likely to perform any better than the traditional way of writing the query? -- E On May 4, 2012, at 11:42 AM, Nico Williams n...@cryptonector.com wrote: On Fri, May 4, 2012 at 9:20 AM, Richard Hipp d...@sqlite.org wrote: Queries of the form: SELECT max(x), y FROM table returns the value of y on the same row that contains the maximum x value. Is that standard SQL behavior? I'd have expected that to return one row for every row in the table. To get the behavior described above, I'd use SELECT x, y FROM table WHERE x = (SELECT max(x) FROM table). It is definitely NOT standard behavior. The standard behavior is undefined. Or (with many SQL engines) it will throw an error if you have a term in the result set that is not part of an aggregate function or an element of the GROUP BY clause. But lots of newbies expect SQL to work as described in the 3.7.11 release comments, and we used to get support questions because it did not. And so rather than continue to answer the questions over and over, I figured it would be easier to tweak SQLite to reliably do what newbies expect. I never anticipated that this change would be so controversial or confusing. This is very clever. I'm not sure that an informative error message wouldn't have been better, but I think you made the right choice given SQLite3's previous behavior. A pragma by which to cause SQLite3 to return an error instead might be useful, but then, it's SQL_Lite_. Is there any way to define aggregate functions that pick a row for providing column values in non-aggregate expressions? E.g., you could have a median() or mode(), no? I don't think this is important, am just curious. Nico -- ___ 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
