Question

I have a problem with SQLLite3 update function. I don’t know if my query is wrong or is that something wrong with the function I build.

- (void)updateRowWithID:(NSString *)databaseItem AndWithColumnName:(NSString *)changeColumnName AndWithValue:(NSString *)changeValue
{
    NSString * sql = [NSString stringWithFormat:@"UPDATE tblUsers SET %@ = %@ WHERE ID = %@", changeColumnName, changeValue, databaseItem];

    sqlite3_stmt * statement;
    if(sqlite3_open([[self path]UTF8String], &database) == SQLITE_OK)
    {
        const char *insert_stmt = [sql UTF8String];

        NSLog(@"UPDATE: %@",sql);

        // here it says the something wrong and the application crush.
        if(sqlite3_prepare_v2(database, insert_stmt, -1, &statement, NULL) != SQLITE_OK)
        {
            NSAssert(0, @"ERROR ON INSERTING TO TABLE");
        }
        int success = sqlite3_step(statement);
        if(success)
            NSLog(@"Success");
    }
}

This is the crush log:

2012-10-27 22:07:47.088 myapplication[21778:15803] *** Assertion failure in -[userData updateRowWithID:AndWithColumnName:AndWithValue:], /Users/user/myapplication/userData.m:47
2012-10-27 22:07:47.089 myapplication[21778:15803] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'ERROR ON INSERTING TO TABLE'
*** First throw call stack:
(0x1a70022 0x1600cd6 0x1a18a48 0x133f2cb 0xcfc8 0xfcab 0x1a71e99 0x9ab14e 0x9ab0e6 0xa51ade 0xa51fa7 0xa51266 0x9d03c0 0x9d05e6 0x9b6dc4 0x9aa634 0x224fef5 0x1a44195 0x19a8ff2 0x19a78da 0x19a6d84 0x19a6c9b 0x224e7d8 0x224e88a 0x9a8626 0x2835 0x2735 0x1)
terminate called throwing an exception(lldb) 

Please tell me, what am I doing wrong here?

Thanks!

Answer 1

Call sqlite3_errmsg() to find out what went wrong.

It’s likely that a table or column name is wrong, or that the database is empty because the file at path does not exist.