Postgresql 自动增量在 Ubuntu 中不起作用

Question

我有以下 table 称为 work_expenses:

                                                             Table "public.work_expenses"
       Column       |  Type   | Collation | Nullable |                        Default                         | Storage  | Stats target | Description 
--------------------+---------+-----------+----------+--------------------------------------------------------+----------+--------------+-------------
 work_expensesid    | integer |           | not null | nextval('work_expenses_work_expensesid_seq'::regclass) | plain    |              | 
 workid             | integer |           |          |                                                        | plain    |              | 
 employeeid         | integer |           |          |                                                        | plain    |              | 
 date_linkid        | integer |           |          |                                                        | plain    |              | 
 expense_categoryid | integer |           |          |                                                        | plain    |              | 
 cost_incl_gst      | numeric |           |          |                                                        | main     |              | 
 note               | text    |           |          |                                                        | extended |              | 
Indexes:
    "work_expenses_pkey" PRIMARY KEY, btree (work_expensesid)
Foreign-key constraints:
    "work_expenses_date_linkid_fkey" FOREIGN KEY (date_linkid) REFERENCES date_link(date_linkid)
    "work_expenses_employeeid_fkey" FOREIGN KEY (employeeid) REFERENCES employee(employeeid)
    "work_expenses_expense_categoryid_fkey" FOREIGN KEY (expense_categoryid) REFERENCES expense_category(expense_categoryid)
    "work_expenses_workid_fkey" FOREIGN KEY (workid) REFERENCES work(workid)

当我插入数据而不输入 work_expensesid 时，它应该会自动递增，但它不会。改为使用以下 INSERT 命令：

INSERT INTO work_expenses (work_expensesid,workid,employeeid,date_linkid,expense_categoryid,cost_incl_gst,note)
VALUES
        (NULL,1,220,4,5.00,NULL),
        (NULL,1,220,5,33.75,NULL),
        (631,1,218,13,21.50,'trailer load of tree branches')
;

我收到如下错误信息：

ERROR:  INSERT has more target columns than expressions
LINE 1: ...mployeeid,date_linkid,expense_categoryid,cost_incl_gst,note)
                                                                  ^

所有其他 table 都存在这个问题。有人可以指出我正确的方向吗？我想要实现的是，我以后每次输入记录时都不需要提供新的序列号。 table 目前有 365 条记录，这些记录是通过提供唯一的 work_expensesid 输入的。附加信息：

         Sequence "public.work_expenses_work_expensesid_seq"
  Type   | Start | Minimum |  Maximum   | Increment | Cycles? | Cache 
---------+-------+---------+------------+-----------+---------+-------
 integer |     1 |       1 | 2147483647 |         1 | no      |     1
Owned by: public.work_expenses.work_expensesid

Schema |               Name                |   Type   |  Owner   |    Size    | Description 
--------+-----------------------------------+----------+----------+------------+-------------
 public | work_expenses_work_expensesid_seq | sequence | postgres | 8192 bytes |

crewdb=# select count(*) from work_expenses;
 count 
-------
   365
(1 row)

Answer 1

INSERT has more target columns than expressions

这只是意味着您需要从插入目标列表中删除列 work_expensesid：

INSERT INTO work_expenses 
  (workid,employeeid,date_linkid,expense_categoryid,cost_incl_gst,note)
VALUES
  (NULL, 1,220,4,5.00,NULL),
  (NULL, 1,220,5,33.75,NULL),
  (631, 1,218,13,21.50,'trailer load of tree branches');

Online example

现在建议为此使用标识列：

create table work_expenses
(
  work_expensesid     integer   not null generated always as identity primary key,
  workid              integer,
  employeeid          integer,
  date_linkid         integer,
  expense_categoryid  integer,
  cost_incl_gst       numeric,
  note                text   
)

Postgresql 自动增量在 Ubuntu 中不起作用

Postgresql auto-increment is not working in Ubuntu

postgresql

ddl

auto-increment