{
    "table_name": "approval_step",
    "fields": [
        {
            "name": "id",
            "type": "varchar(32)",
            "not_null": true,
            "comment": "主键ID"
        },
        {
            "name": "workflow_id",
            "type": "varchar(32)",
            "not_null": true,
            "comment": "所属工作流ID"
        },
        {
            "name": "step_name",
            "type": "varchar(100)",
            "not_null": true,
            "comment": "步骤名称"
        },
        {
            "name": "step_number",
            "type": "int",
            "not_null": true,
            "comment": "步骤顺序号"
        },
        {
            "name": "approver_role",
            "type": "varchar(20)",
            "comment": "审批角色: role/user"
        },
        {
            "name": "approver_id",
            "type": "varchar(32)",
            "comment": "审批人ID"
        },
        {
            "name": "description",
            "type": "varchar(500)",
            "comment": "步骤描述"
        },
        {
            "name": "timeout_hours",
            "type": "int",
            "comment": "超时小时数"
        }
    ],
    "indexes": [
        {
            "name": "idx_step_workflow",
            "fields": [
                "workflow_id"
            ],
            "type": "normal"
        },
        {
            "name": "idx_step_order",
            "fields": [
                "workflow_id",
                "step_number"
            ],
            "type": "normal",
            "comment": "复合索引：按工作流和顺序查询"
        }
    ],
    "codes": [
        {
            "key": "role",
            "name": "角色审批"
        },
        {
            "key": "user",
            "name": "指定人审批"
        }
    ],
    "summary": [
        {
            "name": "approval_step",
            "title": "审批步骤",
            "primary": "id",
            "catelog": "entity"
        }
    ]
}