CREATE VIEW identifier_crosswalk AS
SELECT r.id AS local_repository_row_id, u.id AS local_owner_id,
       u.github_id AS github_owner_id, r.repository_id AS github_repository_id,
       u.github_name AS owner_login, r.name AS repository_name_stored,
       CASE WHEN instr(r.name, '/') > 0 THEN substr(r.name, instr(r.name, '/') + 1)
            ELSE r.name END AS repository_name,
       u.github_name || '/' || CASE WHEN instr(r.name, '/') > 0
            THEN substr(r.name, instr(r.name, '/') + 1) ELSE r.name END AS owner_name,
       'https://github.com/' || u.github_name || '/' || CASE WHEN instr(r.name, '/') > 0
            THEN substr(r.name, instr(r.name, '/') + 1) ELSE r.name END AS repository_url
FROM repositories r JOIN users u ON u.id=r.user_id;