Sqlite3 table primary key gets replaced - objective-c

Question

I am having SQLite database where I have one table called tblUser,where I am having variables say Id,name,image,gender.
In my app,I am giving functionality to add,delete update the User entry (Common functionality). Say I have 2 record by default on the page with 2 users and that both are deleted. Now the 3rd record inserted will be provided Primary key as 3.
Now if I edit that particular record then it is not updated with new data rather the primary key of the same gets replaced with 1 when I call following function :
+ (void) getInitialDataToDisplay:(NSString *)dbPath
{
AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
//sqlite3_open([dbPath UTF8String], &database);
if (sqlite3_open([dbPath UTF8String], &database) == SQLITE_OK)
{
const char *sql = "select UserId,UserAge,UserName,UserGender,UserImage from [tblUser]";
sqlite3_stmt *selectstmt;
if(sqlite3_prepare_v2(database, sql, -1, &selectstmt, NULL) == SQLITE_OK)
{
while(sqlite3_step(selectstmt) == SQLITE_ROW)
{
NSInteger primaryKey = sqlite3_column_int(selectstmt,0);
UserDetail *DataObj = [[UserDetail alloc] initWithPrimaryKey:primaryKey];
DataObj.UserAge = sqlite3_column_int(selectstmt,1);
DataObj.UserName = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectstmt, 2)];
DataObj.UserGender = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectstmt, 3)];
DataObj.UserImage = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selectstmt, 4)];
DataObj.isDirty = NO;
[appDelegate.DataArray addObject:DataObj];
}
}
else
{
NSAssert1(0,#"Error: failed to prepare statement with message '%s'.", sqlite3_errmsg(database));
}
}
else
sqlite3_close(database); //Even though the open call failed, close the database connection to release all the memory.
}
Note that I am calling this function when I come back to the page where listing of the user is shown after clicking save button of the page where all details need to be filled. Any hint will be much helpful. Thank you.

Answer 1

Assuming that UserId is an INTEGER PRIMARY KEY:
SQLite will create new IDs as one larger than the previously largest value,
but if the table is empty, it will (re)start at 1.