I am using Postgres.
The following errors occurred.
It is necessary to cast the type of int and text.
HINT: No operator matches the given name and argument type(s). You might need to add explicit type casts.
This can be fixed by editing line 101 in file tracsubtickets/web_ui.py to read:
cursor.execute("SELECT parent, child FROM subtickets WHERE parent='%s'",
Note the addition of the single quites around %s . Now simply build the egg, and you're good to go.