# 产品结构
drop table if exists product_structure;
create table product_structure
(
    id                 bigint auto_increment
        primary key,
    product_id         bigint         not null comment '产品id',
    process_id         bigint         not null comment '工序id',
    unit_quantity      numeric(16, 4) not null comment '单位产出需要数量',
    demanded_quantity  numeric(16, 4) not null comment '需求数量',
    unit               varchar(255)   not null comment '单位',
    disk_quantity      numeric(16, 4) not null comment '盘数量',
    tenant_id          bigint         not null comment '租户id'
);