PostgreSQL使用jsonb进行数组增删改查的操作详解

create table purchase_order
(
    id                     serial not null primary key,
    tag                    jsonb
)

INSERT INTO purchase_order (id, tag) VALUES (4787, '[{"uid": 1, "name": "标签名1", "add_time": "2021-05-29 17:00:00"}, {"uid": 2, "name": "标签名2", "add_time": "2021-05-29 17:00:00"}]');

[{
	"uid": 1,
	"name": "标签名1",
	"add_time": "2021-05-29 17:00:00"
}, {
	"uid": 2,
	"name": "标签名2",
	"add_time": "2021-05-29 17:00:00"
}]

-- 嵌套子查询
select * from (
select jsonb_array_elements(tag) as tt from purchase_order where id =  4787) a
where  tt -> 'uid' = '1';

-- 或者这种方式
SELECT
    id,r
FROM
    purchase_order s, jsonb_array_elements(s.tag) r
WHERE
    s.id =  4787  and r->>'uid' = '2' ;

SELECT tag FROM purchase_order
WHERE id =  4787 and tag @> '[{"uid": 3}]';

[{
	"uid": 1,
	"name": "标签名1",
	"add_time": "2021-05-29 17:00:00"
}, {
	"uid": 2,
	"name": "标签名2",
	"add_time": "2021-05-29 17:00:00"
}]

UPDATE purchase_order SET tag = tag || '[{
	"uid": 3,
	"name": "标签名3",
	"add_time": "2021-05-29 17:00:00"
}]' where  id = 4787;

[{
	"uid": 1,
	"name": "标签名1",
	"add_time": "2021-05-29 17:00:00"
}, {
	"uid": 2,
	"name": "标签名2",
	"add_time": "2021-05-29 17:00:00"
}, {
	"uid": 3,
	"name": "标签名3",
	"add_time": "2021-05-29 17:00:00"
}]

UPDATE purchase_order
       SET tag = t.js_new
      FROM
          (
           SELECT jsonb_agg( (tag ->> ( idx-1 )::int)::jsonb ) AS js_new
             FROM purchase_order
            CROSS JOIN jsonb_array_elements(tag)
             WITH ORDINALITY arr(j,idx)
            WHERE j->>'uid' NOT IN ('3')
          ) t;

UPDATE purchase_order AS g
   SET tag = REPLACE(tag::text, '"name": "标签名1"','"name": "标签new"')::json
 WHERE g.tag IN ( SELECT g.tag
                     FROM purchase_order AS g
                    CROSS JOIN jsonb_array_elements(g.tag) AS j
                    WHERE id = 4787 and  j ->>'uid' = '1' )