Re: [sqlite] unique constraints
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 On 25/08/12 20:19, Simon Slavin wrote: You know, it does make sense that if the problem is a violated constraint, it does always tell you which constraint was violated. You might have a number of different constraints on a column, and it would be nice to be told which one was causing the abort. You do get told which constraint name caused an abort, which was something you didn't get before. The only quirk now is that if the constraint was uniqueness of a particular column then you get told the column name instead of the constraint name. Your code has sufficient information to make sense of exactly what happened. Roger -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.11 (GNU/Linux) iEYEARECAAYFAlA5y/cACgkQmOOfHg372QQFJwCfcpUqvs61ht8E/OCfUHMTxIuk RsoAn00BRAkMO07peoJ7p5lQElQ06X4X =JV0u -END PGP SIGNATURE- ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] SQLite support on windows
[Quote] *There are a number of devices that run Windows CE That is the vortex in this issue. The app is being developed on Win7. Using C++ and Gtkmm as the GUI toolkit, the libraries used for manipulation and storage of data is 'home cooked', with the exception of the SQLite3 library. From the inception of the project, the development has always been with the intention of portability, thus, it is assumed that if the device can run C/C++ applications it will be able to run our application as well. Going back to the question of the 'number of devices' that you mentioned... where could I find a list of these number of devices? Does Microsoft has one? TIA -Original Message- From: Mohit Sindhwani [mailto:m...@onghu.com] Sent: Sunday, August 26, 2012 1:13 AM To: General Discussion of SQLite Database Cc: Arbol One Subject: Re: [sqlite] SQLite support on windows On 26/8/2012 12:30 PM, Arbol One wrote: I am glad someone asked this question, we are almost finish with a small application that is best suited for a hand held device. Is there a device anyone here could suggest? As I said, the application is very small and uses SQLite as its RDB. The application resembles a questionnaire... fill in the blanks kind of thing, the data collected goes in to the RDB and later on downloaded to a pc. TIA What kind of device are you looking for? A lot also depends on what platform your application is built for, and what it needs. Your current description tends to suggest that it's rather well suited as an app for any (or many) of the mobile phones. There are a number of devices that run Windows CE and you can compile SQLite3 with Visual Studio for those devices. Best Regards, Mohit. 26/8/2012 | 1:11 PM. ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] SQLite support on windows
On Sun, Aug 26, 2012 at 9:23 AM, Arbol One arbol...@gmail.com wrote: [Quote] *There are a number of devices that run Windows CE That is the vortex in this issue. The app is being developed on Win7. Using C++ and Gtkmm as the GUI toolkit, the libraries used for manipulation and storage of data is 'home cooked', with the exception of the SQLite3 library. From the inception of the project, the development has always been with the intention of portability, thus, it is assumed that if the device can run C/C++ applications it will be able to run our application as well. Going back to the question of the 'number of devices' that you mentioned... where could I find a list of these number of devices? Does Microsoft has one? TIA http://pdadb.net/index.php?m=os -- -- -- --Ô¿Ô-- K e V i N -Original Message- From: Mohit Sindhwani [mailto:m...@onghu.com] Sent: Sunday, August 26, 2012 1:13 AM To: General Discussion of SQLite Database Cc: Arbol One Subject: Re: [sqlite] SQLite support on windows On 26/8/2012 12:30 PM, Arbol One wrote: I am glad someone asked this question, we are almost finish with a small application that is best suited for a hand held device. Is there a device anyone here could suggest? As I said, the application is very small and uses SQLite as its RDB. The application resembles a questionnaire... fill in the blanks kind of thing, the data collected goes in to the RDB and later on downloaded to a pc. TIA What kind of device are you looking for? A lot also depends on what platform your application is built for, and what it needs. Your current description tends to suggest that it's rather well suited as an app for any (or many) of the mobile phones. There are a number of devices that run Windows CE and you can compile SQLite3 with Visual Studio for those devices. Best Regards, Mohit. 26/8/2012 | 1:11 PM. ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] SQLite support on windows
On 26 Aug 2012, at 2:23pm, Arbol One arbol...@gmail.com wrote: [Quote] *There are a number of devices that run Windows CE That is the vortex in this issue. The app is being developed on Win7. Using C++ and Gtkmm as the GUI toolkit, the libraries used for manipulation and storage of data is 'home cooked', with the exception of the SQLite3 library. From the inception of the project, the development has always been with the intention of portability, thus, it is assumed that if the device can run C/C++ applications it will be able to run our application as well. Going back to the question of the 'number of devices' that you mentioned... where could I find a list of these number of devices? Does Microsoft has one? Okay, there are some issues here to do with developing for standardised mobile devices. First, no mobile handheld device runs Windows 7. There are about 20 other versions of 'Windows' they run. If you're developing an app /for/ a mobile device, develop and test it /on/ a mobile device, or a simulator for that device. A huge tranche of Windows APIs is missing on mobile versions of Windows, just like a huge tranche of OS X APIs is missing for the iPhone. Plus your most important factor in usability will be the GUI, and you don't know how fast it'll be or how it'll look and feel unless you're testing on a mobile display. I might do some very preliminary development for an iPhone/iPad app by testing on my Mac. Possibly just to figure out file formats. But I'd transfer to the iPhone/iPad simulator as soon as possible because until then I can't even guess what the GUI will look like. And it's even truer of Android, where no desktop computer OS is even close to Android. Second, the list of mobile devices which run various versions of Windows changes so fast it's pointless asking for one unless you're ready to launch this week. Not only that, but there are menu different versions of Windows, and which devices you care about depends on which version of Windows you want, which depends on which APIs you need. The Mobile Windows development arena isn't just a one-size-fits-all system. While manufacturers refuse to let their devices upgrade to later versions of the OS, picking your OS version requirements is the same as picking which devices your app will run on. The alternative it to pick your own handheld device, order a hundred of them (or however many you need for testing) and to test on that. SQLite is a tiny component in all this, and the least of your problems, since it works on nearly everything. You're going to spend far more time on your GUI and in getting the collected data back to a computer. Simon. ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] unique constraints
The circumstances I was thinking about is if you had many tables with a column called 'name'. If each table had a different name for the constraint, then they could be differentiated. Otherwise, it would be nice to at least have the name of the table included in the error message. Also, I just noticed this same behavior of foreign key constraints. Even when they are named, a FK violation error message just says: sqlite3.IntegrityError: foreign key constraint failed Again, it would be nice for the error message to report the constraint name and/or the table name. The rationale behind this is the same -- multiple tables could have the same column names and FK constraints. Thanks, -John On Sat, Aug 25, 2012 at 08:13:22PM -0700, Roger Binns wrote: It does tell you the name of the column. Under what circumstances could you not work with that? ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Jdbc Blob Incremental I/O
Hi,
I've been trying to support incremental I/O in a Jdbc driver.
By forcing the user to access the rowid before the blob, it's possible
to use only the JDBC API for loading a Blob:
// CREATE TABLE test (data BLOB); INSERT INTO test (data) VALUES
(zeroblob(1024));
ResultSet rs = stmt.executeQuery(SELECT rowid, data FROM test);
rs.getRowId(1);
final Blob blob = rs.getBlob(2);
...
Indeed, with the rowId kept internally by the driver and with the
column index (2), I can retrieve all the data needed by
'sqlite3_blob_open': dbName, tblName, colName.
I will also support this alternative:
PrepareStatement pstmt = c.prepareStatement(SELECT data FROM test
where rowid = :rowid);
pstmt.setRowId(1, ...); -- rowId value kept internally
ResultSet rs = pstmt.executeQuery();
final Blob blob = rs.getBlob(1);
But for update/insert, it doesn't work because the
sqlite3_column_name, sqlite3_column_origin_name,
sqlite3_column_table_name and sqlite3_column_database_name can only be
used with select:
PreparedStatement pstmt = c.prepareStatement(UPDATE test SET data
= :blob WHERE rowid = :rowid);
pstmt.setRowId(2, new RowIdImpl(rowid));
pstmt.setBinaryStream(1, new ByteArrayInputStream(new byte[] {1,
2, 3, 4, 5, 6})); -- fails
pstmt.executeUpdate();
Do you see a way to write a blob incrementally by using only the JDBC API?
(I've checked all the other implementations, but they don't support
reading, nor writing...)
Thanks.
(the driver is here:
https://github.com/gwenn/sqlite-jna/tree/master/src/main/java/org/sqlite/driver)
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[sqlite] Connect MySQL database made with phpMyAdmin to Sqlite
Hello everyone, My name is Nicole Siota and I am a university student currently working on my thesis. I want to make a PC trivia game with 2D graphics and write a manual on how to do it. I decided to work on this project to learn more about this and give it my best shot. Unfortunately, I have quite a basic problem. I have created a database with several tables in MySQL using the phpMyAdmin tool from XAMPP (apache) and I want to connect it with a VB.NET project. I thought that using Sqlite would be better for my project since it has a VB.NET feature. I exported my database as a .sql file but I can not use it with Sqlite because it shows me that only .db or .sqlite files are accepted. I tried to open my file with Sqlite3 but it showed that the tables contained errors. I am kind of confused on what needs to be done to make this work. If someone can answer me, I would be very grateful. Any help is very much appreciated. Thank you so much for your time. Nicole Siota P.S.: If someone knows a tip on connecting directly a MySQL database made with XAMPP to VB.NET, I would be very happy as well. Thank you so much again! ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Import at first unhappy - then happy after all
On Sun, Aug 26, 2012 at 11:30 AM, Udi Karni uka...@gmail.com wrote: ***SNIP*** As an aside - not a big deal - this is on Windows - the file specifications in the .import and .read commands require 2 back slashes in the syntax - can that be fixed? Thanks ! The explanation for this behavior is here http://www.sqlite.org/cvstrac/tktview?tn=1073 -- -- -- --Ô¿Ô-- K e V i N ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Import at first unhappy - then happy after all
Thanks for the explanation. Is there a way to change the Sqlite escape character globaly? Chose some out-of-the-way character that would allow backward quotes to be used normally? Something like - .escape [ .read c:\path\file.sql ??? On Sun, Aug 26, 2012 at 9:41 AM, Kevin Benson kevin.m.ben...@gmail.comwrote: On Sun, Aug 26, 2012 at 11:30 AM, Udi Karni uka...@gmail.com wrote: ***SNIP*** As an aside - not a big deal - this is on Windows - the file specifications in the .import and .read commands require 2 back slashes in the syntax - can that be fixed? Thanks ! The explanation for this behavior is here http://www.sqlite.org/cvstrac/tktview?tn=1073 -- -- -- --Ô¿Ô-- K e V i N ___ 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] Connect MySQL database made with phpMyAdmin to Sqlite
On 26 Aug 2012, at 11:37am, Νικολέττα Σιώτα nicolesi...@hotmail.com wrote: I have created a database with several tables in MySQL using the phpMyAdmin tool from XAMPP (apache) and I want to connect it with a VB.NET project. I thought that using Sqlite would be better for my project since it has a VB.NET feature. I exported my database as a .sql file but I can not use it with Sqlite because it shows me that only .db or .sqlite files are accepted. I tried to open my file with Sqlite3 but it showed that the tables contained errors. I am kind of confused on what needs to be done to make this work. If someone can answer me, I would be very grateful. Any help is very much appreciated. Thank you so much for your time. You will find a MySQL tool which will output your MySQL database as the set of SQL commands which would be needed to make that database. The result will be a text file which includes some 'CREATE TABLE' commands and many 'INSERT' commands, and some other commands. Then you do X. I will come back to X. Then you can use the SQLite shell tool (you can download it from the SQLite web site) to turn this text file into a SQLite database file. You use the '.read' command. Now I write about X. The formats for SQL commands are slightly different between MySQL and SQLite. You are probably going to have to use a text editor to make a minor change or two to the text file. It might word first time, it might not. Simon. ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Import at first unhappy - then happy after all
On Sun, Aug 26, 2012 at 11:30 AM, Udi Karni uka...@gmail.com wrote: The following scenario happens occasionally. At first the import fails on mismatched columns - as if the end-of-line marker is off. You run it again right away and everything completes successfully. ? Is there some kind of tracing that can be turned on so that when this happens we can gather some clues? As an aside - not a big deal - this is on Windows - the file specifications in the .import and .read commands require 2 back slashes in the syntax - can that be fixed? Thanks ! Perhaps http://www.sqlite.org/uri.html 3.1 The URI Path will help you -- -- -- --Ô¿Ô-- K e V i N Z:\sqlite3 z:\xyz.db3 SQLite version 3.7.11 2012-03-20 11:35:50 Enter .help for instructions Enter SQL statements terminated with a ; sqlite pragma page_size=4096; sqlite pragma journal_mode=off; off sqlite pragma temp_store=memory; sqlite .timer on sqlite .separator ',' sqlite .read c:\\create_table\\create_table_xyz.sql CPU Time: user 0.00 sys 0.00 sqlite .import c:\\data_csv\\xyz.csv xyz Error: c:\data_csv\xyz.csv line 12: expected 59 columns of data but found 99 sqlite select count (*) from xyz; 0 CPU Time: user 0.00 sys 0.00 sqlite .import c:\\data_csv\\xyz.csv xyz sqlite select count (*) from xyz; 97744059 ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
