DROP TABLE IF EXISTS mocha_relationships;

CREATE TABLE mocha_relationships
(
    id INT NOT NULL PRIMARY KEY AUTO_INCREMENT,
    tenant_id INT,
    source_inst_id INT,
    relationship_inst_id INT,
    destination_inst_id INT,
    user_inst_id INT,
    effective_date DATETIME,
    
    INDEX `rel_index_FI_1`
        (tenant_id, source_inst_id, relationship_inst_id),

    CONSTRAINT `rel_inst_id_FK_tenant`
        FOREIGN KEY (`tenant_id`)
        REFERENCES `mocha_tenants` (`id`),

    CONSTRAINT `rel_inst_id_FK_src`
        FOREIGN KEY (`source_inst_id`)
        REFERENCES `mocha_instances` (`id`),

    CONSTRAINT `rel_inst_id_FK_rel`
        FOREIGN KEY (`relationship_inst_id`)
        REFERENCES `mocha_instances` (`id`),

    CONSTRAINT `rel_inst_id_FK_dst`
        FOREIGN KEY (`destination_inst_id`)
        REFERENCES `mocha_instances` (`id`),

    CONSTRAINT `rel_inst_id_FK_usr`
        FOREIGN KEY (`user_inst_id`)
        REFERENCES `mocha_instances` (`id`)
);