-- Keep this guard durable across a failed down attempt. It rejects a rollback before
-- any baseline table is dropped when an administrator has created business data.
CREATE TABLE IF NOT EXISTS chorus_admin_baseline_down_guard (
    id TINYINT NOT NULL,
    CONSTRAINT chk_chorus_admin_baseline_down_guard CHECK (id = 0)
) ENGINE=InnoDB;

DELETE FROM chorus_admin_baseline_down_guard;
INSERT INTO chorus_admin_baseline_down_guard (id)
SELECT 1
WHERE EXISTS (SELECT 1 FROM sys_user)
   OR EXISTS (SELECT 1 FROM sys_role)
   OR EXISTS (SELECT 1 FROM sys_dept)
   OR EXISTS (SELECT 1 FROM sys_post)
   OR EXISTS (SELECT 1 FROM sys_menu)
   OR EXISTS (SELECT 1 FROM sys_api)
   OR EXISTS (SELECT 1 FROM sys_config)
   OR EXISTS (SELECT 1 FROM sys_dict_type)
   OR EXISTS (SELECT 1 FROM sys_dict_data)
   OR EXISTS (SELECT 1 FROM sys_job)
   OR EXISTS (SELECT 1 FROM sys_login_log)
   OR EXISTS (SELECT 1 FROM sys_opera_log)
   OR EXISTS (SELECT 1 FROM sys_tables)
   OR EXISTS (SELECT 1 FROM sys_columns)
   OR EXISTS (SELECT 1 FROM sys_casbin_rule);

DROP TABLE sys_columns;
DROP TABLE sys_tables;
DROP TABLE sys_opera_log;
DROP TABLE sys_login_log;
DROP TABLE sys_job;
DROP TABLE sys_dict_data;
DROP TABLE sys_dict_type;
DROP TABLE sys_config;
DROP TABLE sys_menu_api_rule;
DROP TABLE sys_role_dept;
DROP TABLE sys_role_menu;
DROP TABLE sys_casbin_rule;
DROP TABLE sys_api;
DROP TABLE sys_menu;
DROP TABLE sys_user;
DROP TABLE sys_post;
DROP TABLE sys_dept;
DROP TABLE sys_role;
DROP TABLE chorus_admin_baseline_down_guard;