BEGIN;

SET client_min_messages = warning;

CREATE TABLE :"registry".releases (
    version         REAL        PRIMARY KEY,
    installed_at    TIMESTAMPTZ NOT NULL DEFAULT clock_timestamp(),
    installer_name  TEXT        NOT NULL,
    installer_email TEXT        NOT NULL
);

COMMENT ON TABLE  :"registry".releases                 IS 'Sqitch registry releases.';
COMMENT ON COLUMN :"registry".releases.version         IS 'Version of the Sqitch registry.';
COMMENT ON COLUMN :"registry".releases.installed_at    IS 'Date the registry release was installed.';
COMMENT ON COLUMN :"registry".releases.installer_name  IS 'Name of the user who installed the registry release.';
COMMENT ON COLUMN :"registry".releases.installer_email IS 'Email address of the user who installed the registry release.';

-- Add the script_hash column to the changes table. Copy change_id for now.
ALTER TABLE :"registry".changes ADD COLUMN script_hash TEXT NULL UNIQUE;
UPDATE :"registry".changes SET script_hash = change_id;
COMMENT ON COLUMN :"registry".changes.script_hash IS 'Deploy script SHA-1 hash.';

-- Allow "merge" events.
ALTER TABLE :"registry".events DROP CONSTRAINT events_event_check;
ALTER TABLE :"registry".events ADD  CONSTRAINT events_event_check
      CHECK (event IN ('deploy', 'revert', 'fail', 'merge'));

COMMIT;