postgresql迁移至分区表

最新推荐文章于 2024-11-14 00:12:20 发布

aoerqileng

最新推荐文章于 2024-11-14 00:12:20 发布

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分类专栏： PostgreSQL管理

本文链接：https://blog.youkuaiyun.com/aoerqileng/article/details/50588725

本文介绍了如何将PostgreSQL中的orders表迁移到基于日期的分区表。通过创建一系列的子表继承自原orders表，并设置相应的检查约束、主键和外键约束，实现了按月分区。同时，建立了索引以提高查询效率，并通过触发器实现数据更新时的自动迁移。

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pg的分区表基于表继承

原orders表

CREATE TABLE public.orders
(
orderid integer NOT NULL DEFAULT nextval('orders_orderid_seq'::regclass),
orderdate date NOT NULL,
customerid integer,
netamount numeric(12,2) NOT NULL,
tax numeric(12,2) NOT NULL,
totalamount numeric(12,2) NOT NULL,
CONSTRAINT orders_pkey PRIMARY KEY (orderid),
CONSTRAINT fk_customerid FOREIGN KEY (customerid)
REFERENCES public.customers (customerid) MATCH SIMPLE
ON UPDATE NO ACTION ON DELETE SET NULL
)

create table orders_2004_01(check(orderdate>=date '2004-01-01' and orderdate<date '2004-02-01')) inherits(orders);

create table orders_2004_02(check(orderdate>=date '2004-02-01' and orderdate<date '2004-03-01')) inherits(orders);
create table orders_2004_03(check(orderdate>=date '2004-03-01' and orderdate<date '2004-04-01')) inherits(orders);
create table orders_2004_04(check(orderdate>=date '2004-04-01' and orderdate<date '2004-05-01')) inherits(orders);
create table orders_2004_05(check(orderdate>=date '2004-05-01' and orderdate<date '2004-06-01')) inherits(orders);
create table orders_2004_06(check(orderdate>=date '2004-06-01' and orderdate<date '2004-07