Class Table 继承模型的 INSERT 语句

INSERT statement for Class Table Inheritance model

我有两个table定义如下:

create table MY_COMPONENT (
ID uuid,
VERSION integer not null,
CREATE_TS timestamp,
CREATED_BY varchar(50),
UPDATE_TS timestamp,
UPDATED_BY varchar(50),
DELETE_TS timestamp,
DELETED_BY varchar(50),
DTYPE varchar(31),
--
PRODUCT_NUMBER varchar(255),
DESCRIPTION varchar(255),
MANUFACTURER varchar(100),
--
primary key (ID)
)

create table BASE (
ID uuid,
primary key (ID)
)

BASE 是 MY_COMPONENT 的子类。

我有以下约束:

create unique index IDX_DEIPRODUCTCONFIG2_MY_COMPONENT_UK_PRODUCT_NUMBER 
on DEIPRODUCTCONFIG2_MY_COMPONENT (PRODUCT_NUMBER) where DELETE_TS is null 

alter table DEIPRODUCTCONFIG2_BASE add constraint FK_DEIPRODUCTCONFIG2_BASE_ID 
foreign key (ID) references DEIPRODUCTCONFIG2_MY_COMPONENT(ID)

我想做的是

INSERT INTO BASE(ID, VERSION, PRODUCT_NUMBER, DESCRIPTION, MANUFACTURER);

正如我所发现的,这个确切的语法不起作用,因为 BASE 没有 PRODUCT_NUMBERDESCRIPTIONMANUFACTURER,因为它们是商店在 MY_COMPONENT table 中。我还尝试使用 NEWID()MY_COMPONENT 中插入一行,并使用相同的 ID 尝试插入到 BASE 中。我也尝试了相反的方法,先插入 BASE,然后使用它的 ID 插入 MY_COMPONENT。这两个都会引发有关违反唯一约束的错误。

我很清楚,我对数据库编程还很陌生。这些 table 和约束不是我创造的;我正在使用 CUBA 平台进行开发,这些 table 创建脚本是自动为我生成的。我确实理解 CREATE 语句的语法,但是 FOREIGN_KEY 的用途和用途对我来说并不是很清楚。或许那是我的缺失link。但非常感谢任何指导。

我可能漏掉了一点,但我无法重现你的问题,插入 MY_COMPONENT 然后 BASE 对我来说似乎很好......

无论如何,如果你想用存储过程来做,这里是:

CREATE FUNCTION addbase(
    version INTEGER,
    product_number VARCHAR(255)
  --
) RETURNS VOID AS $$
DECLARE
    uid uuid := uuid_generate_v4();
BEGIN
    INSERT INTO my_component(id,version,product_number) 
    VALUES(uid, version,product_number);
    INSERT INTO base(id) 
    VALUES(uid);
END ;
$$ LANGUAGE plpgsql /

完整答案

SQL Fiddle

PostgreSQL 9.6 架构设置:

CREATE EXTENSION IF NOT EXISTS "uuid-ossp"
/
create table MY_COMPONENT (
ID uuid,
VERSION integer not null,
CREATE_TS timestamp,
CREATED_BY varchar(50),
UPDATE_TS timestamp,
UPDATED_BY varchar(50),
DELETE_TS timestamp,
DELETED_BY varchar(50),
DTYPE varchar(31),
--
PRODUCT_NUMBER varchar(255),
DESCRIPTION varchar(255),
MANUFACTURER varchar(100),
--
primary key (ID)
)
/
create table BASE (
ID uuid,
primary key (ID)
)
/

create unique index IDX_DEIPRODUCTCONFIG2_MY_COMPONENT_UK_PRODUCT_NUMBER 
on MY_COMPONENT (PRODUCT_NUMBER) where DELETE_TS is null 
/
alter table BASE add constraint FK_DEIPRODUCTCONFIG2_BASE_ID 
foreign key (ID) references MY_COMPONENT(ID)
/


CREATE FUNCTION addbase(
    version INTEGER,
    product_number VARCHAR(255)
  --
) RETURNS VOID AS $$
DECLARE
    uid uuid := uuid_generate_v4();
BEGIN
    INSERT INTO my_component(id,version,product_number) 
    VALUES(uid, version,product_number);
    INSERT INTO base(id) 
    VALUES(uid);
END ;
$$ LANGUAGE plpgsql / 

查询 1:

insert into MY_COMPONENT(ID,VERSION,PRODUCT_NUMBER) 
  values(uuid_generate_v4(), 1,'1-dynamic')

Results: 查询 2:

insert into BASE(ID) select ID from MY_COMPONENT where PRODUCT_NUMBER ='1-dynamic'

Results: 查询 3:

insert into MY_COMPONENT(ID,VERSION,PRODUCT_NUMBER) 
  values('774033f8-52a6-4b1f-8602-03ce3c5a7432', 2,'2-static')

Results: 查询 4:

insert into BASE(ID) 
  values('774033f8-52a6-4b1f-8602-03ce3c5a7432')

Results: 查询 5:

select addbase( 44,'3-stored-procedure')

Results:

| addbase |
|---------|
|         |

查询 6:

select * from MY_COMPONENT

Results:

|                                   id | version | create_ts | created_by | update_ts | updated_by | delete_ts | deleted_by |  dtype |     product_number | description | manufacturer |
|--------------------------------------|---------|-----------|------------|-----------|------------|-----------|------------|--------|--------------------|-------------|--------------|
| e48124ff-a26c-4d10-93a7-48da77b613e6 |       1 |    (null) |     (null) |    (null) |     (null) |    (null) |     (null) | (null) |          1-dynamic |      (null) |       (null) |
| 774033f8-52a6-4b1f-8602-03ce3c5a7432 |       2 |    (null) |     (null) |    (null) |     (null) |    (null) |     (null) | (null) |           2-static |      (null) |       (null) |
| b6ecb3ce-e3c2-4f68-8a19-9cfceeba1263 |      44 |    (null) |     (null) |    (null) |     (null) |    (null) |     (null) | (null) | 3-stored-procedure |      (null) |       (null) |

查询 7:

select * from BASE

Results:

|                                   id |
|--------------------------------------|
| e48124ff-a26c-4d10-93a7-48da77b613e6 |
| 774033f8-52a6-4b1f-8602-03ce3c5a7432 |
| b6ecb3ce-e3c2-4f68-8a19-9cfceeba1263 |