/*
DROP TABLE sessions     CASCADE CONSTRAINTS PURGE;
DROP TABLE user_roles   CASCADE CONSTRAINTS PURGE;
DROP TABLE users        CASCADE CONSTRAINTS PURGE;
*/
CREATE TABLE users (
    user_id             VARCHAR2(30)    CONSTRAINT nn_users_user_id     NOT NULL,
    user_login          VARCHAR2(128)   CONSTRAINT nn_users_login       NOT NULL,
    user_name           VARCHAR2(64),
    --
    lang_id             VARCHAR2(5),
    is_active           CHAR(1),
    --
    updated_by          VARCHAR2(30),
    updated_at          DATE,
    --
    CONSTRAINT pk_users
        PRIMARY KEY (user_id),
    --
    CONSTRAINT uq_users_user_login
        UNIQUE (user_login),
    --
    CONSTRAINT ch_users_is_active
        CHECK (is_active = 'Y' OR is_active IS NULL)
)
STORAGE (BUFFER_POOL KEEP);
--
COMMENT ON TABLE  users                     IS '[CORE] List of users';
--
COMMENT ON COLUMN users.user_id             IS 'User ID used internally (short)';
COMMENT ON COLUMN users.user_login          IS 'User login used for login into the app';
COMMENT ON COLUMN users.user_name           IS 'User name visible in the app';
COMMENT ON COLUMN users.lang_id             IS 'Preferred language';
COMMENT ON COLUMN users.is_active           IS 'Flag to disable user without changing roles';