Question

I’m very confused why the SELECT statement doesn’t work correctly. It doesn’t give me any errors, just returns null. I know it is writing the string correctly and the right string is there, it’s just not reading it correctly. Everything as far as I know is correct because I use the same SQLstmt “method” for many other methods/functions similar to this. This one just doesn’t make sense on why it shouldn’t work.

- (NSString *)returnNote {
    selStmt=nil;

    NSLog(@"Reading note");

    NSString *SQLstmt = [NSString stringWithFormat:@"SELECT 'Notes' FROM '%@' WHERE Exercises = '%@';", currentRoutine, currentExercise];

    // Build select statements
    const char *sql = [SQLstmt UTF8String];

    if (sqlite3_prepare_v2(database, sql, -1, &selStmt, NULL) != SQLITE_OK) {
        selStmt = nil;
    }

    // Building select statement failed
    if (!selStmt) {
        NSAssert1(0, @"Can't build SQL to read Exercises [%s]", sqlite3_errmsg(database));
    }

    NSString *note = [NSString stringWithFormat:@"%s", sqlite3_column_text(selStmt, 0)];

    sqlite3_reset(selStmt); // reset (unbind) statement

    return note;
}

Answer 1

You’re not calling sqlite3_step. The statement is never executed.