Under PostgreSQL, SQLite ignores it:

1. create a host group with a 244 character long name
2. create a second host group with a one character name, child of the first

PGError: ERROR: value too long for type character varying(255) : UPDATE "lookup_values" SET "match" = 'hostgroup=aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/b' WHERE "lookup_values"."match" = 'hostgroup='

The length calculation title_and_lookup_key_length doesn't take into account the separator character.

There doesn't appear to be any test coverage in #7038 either of taking parent titles into account.