On Thu, Dec 8, 2011 at 12:25 PM, Alessandro Merolli <amero...@mwneo.com>wrote:
> Hi, > > We've being working with SQLite version 3.6.22 in our project and > we wish to upgrade it to the latest one. During the tests with the new > library version, we noticed a strange behavior related to a trigger which > updates the last inserted row. We where able to simplify the data model and > produce a test case which can be executed using the sqlite3 shell.... This is a real problem that was introduced when we added recursive triggers. But it is very obscure and only comes up when you have really complicated queries inside of triggers - queries that make use of manifested views and/or automatic indices. The trouble ticket is at http://www.sqlite.org/src/info/7bbfb7d442 and the fix is checked in at http://www.sqlite.org/src/info/557c69055a with additional changes at http://www.sqlite.org/src/info/0064bab771 that fix related issues and verify with assert() statements that similar kinds of problems do not recur. These changes will be in the next release. Thanks for providing a test case. That was very helpful in tracking down the problem. > Here are the outputs: > > Execution with latest SQLite 3.7.9: > c:\>sqlite3shell.exe -init .\test_case.sql ":memory:" > -- Loading resources from .\test_case.sql > Expected result: 31|10 > Problematic result: 31|0 > 31|0 > SQLite version 3.7.9 > Enter ".help" for instructions > Enter SQL statements terminated with a ";" > sqlite> .quit > c:\> > > Execution with latest SQLite 3.6.22: > c:\>sqlite3shell.exe -init .\test_case.sql ":memory:" > -- Loading resources from .\test_case.sql > Expected result: 31|10 > Problematic result: 31|0 > 31|10 > SQLite version 3.6.22 > Enter ".help" for instructions > Enter SQL statements terminated with a ";" > sqlite> .quit > > We are using the amalgamation version of the source for both libraries and > here are the compilation defines: > TEMP_STORE=3 > SQLITE_THREADSAFE=2 > SQLITE_DEFAULT_CACHE_SIZE=**65568 > SQLITE_DEFAULT_TEMP_CACHE_**SIZE=65568 > SQLITE_MAX_ATTACHED=30 > SQLITE_ENABLE_COLUMN_METADATA > SQLITE_ENABLE_UNLOCK_NOTIFY > > The error was also reproduced on the original library available for Ubuntu > 10.10. > Additional information is available in the test_case.sql script comments. > > Thanks for the assistance. > Regards, > Alessandro Merolli. > > > > ______________________________**_________________ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-**bin/mailman/listinfo/sqlite-**users<http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-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
