如何消除 postgresql 的批量更新插入中的不明确列引用错误？

Question

对于以下代码，我正在尝试将批量更新插入 table。 table 称为 jobstep_to_step_relationships。如果主键列 "job_base_step_id" 已经存在于 table 中，我希望算法进行更新。

create table jobstep_to_step_relationships

    (
        job_base_step_id uuid default uuid_generate_v4() not null
            constraint jobstep_to_step_relationships_pkey
                primary key,
        step_id uuid not null,
        parent_job_base_step_id uuid not null,
        parent_step_id uuid not null,
        job_id uuid not null,
        order_number integer not null,
        is_group boolean not null,
        created_at bigint not null,
        updated_at bigint not null
    );




INSERT INTO jobstep_to_step_relationships
(job_base_step_id, step_id, parent_job_base_step_id, parent_step_id, job_id, order_number,
 is_group, created_at, updated_at)
VALUES (, , , , , , , , ),
       (, , , , , , , , )
ON CONFLICT (job_base_step_id)
    DO UPDATE SET job_base_step_id        = EXCLUDED.job_base_step_id,
                  step_id                 = EXCLUDED.step_id,
                  parent_job_base_step_id = EXCLUDED.parent_job_base_step_id,
                  parent_step_id          = EXCLUDED.parent_step_id,
                  job_id                  = EXCLUDED.job_id,
                  order_number            = EXCLUDED.order_number,
                  is_group                = EXCLUDED.is_group,
                  created_at              = EXCLUDED.created_at,
                  updated_at              = EXCLUDED.updated_at
WHERE EXCLUDED.job_base_step_id = job_base_step_id
  AND EXCLUDED.step_id = step_id

然而，对于以下发布的代码，我收到此错误：

[2019-06-25 13:17:47] [42702] ERROR: column reference "job_base_step_id" is ambiguous

不确定我对文档的解释有误。有人可以指出什么是错的吗？

Answer 1

指定 table 名称以修复歧义：

WHERE EXCLUDED.job_base_step_id = jobstep_to_step_relationships.job_base_step_id
  AND EXCLUDED.step_id = jobstep_to_step_relationships.step_id

如何消除 postgresql 的批量更新插入中的不明确列引用错误？

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