Question

可以在Postgres的JSONB列中的任何键中查找给定值吗？ In the documentation我无法看到任何例子。

JSONB列的示例值：

{
  a: 1,
  b: 2,
  c: 3
}

我想在任何地方找到1作为值的所有记录。注意：目前可能还有其他密钥而不是a, b, c。

Answer 1

use jsonb_each_text的值，基于以前的McNets样本的示例，

t=# select * from json_test join jsonb_each_text(json_test.data) e on true 
where e.value = '1';
 id |                 data                 | key | value
----+--------------------------------------+-----+-------
  1 | {"a": 1}                             | a   | 1
  3 | {"a": 1, "b": {"c": "d", "e": true}} | a   | 1
(2 rows)

Answer 2

使用json_each_text()：

with my_data(id, jdata) as (
values
    (1, '{ "a": 1, "b": 2, "c": 3}'::json),
    (2, '{ "j": 4, "k": 5, "l": 6}'::json),
    (3, '{ "x": 1, "y": 2, "z": 3}'::json)
)

select id, jdata
from my_data,
lateral json_each_text(jdata) 
where value::int = 1

 id |           jdata           
----+---------------------------
  1 | { "a": 1, "b": 2, "c": 3}
  3 | { "x": 1, "y": 2, "z": 3}
(2 rows)

Answer 3

也许迟到了，但这对我有帮助：

with my_data(id, jdata) as (
values
    (1, '{ "a": 4, "b": 5}'::jsonb),
    (2, '{ "a": 1, "b": 2}'::jsonb),
    (3, '{ "x": {"y": 3, "z": 1}}'::jsonb),
    (4, '{ "a": [2,1,4]}'::jsonb),
    (5, '{ "a": [{"x": 2}, {"y": 1}, {"z": 2}]}'::jsonb)
)

select id, jdata
from my_data
where jdata @? '$.** ? (@ == 1)';

 id |           jdata           
----+---------------------------
  2 | { "a": 1, "b": 2 }
  3 | { "x": { "y": 3, "z": 1 } }
  4 | { "a": [2, 1, 4] }
  5 | { "a": [ { "x": 2 }, { "y": 1 }, { "z": 2 } ] }
(4 rows)

Postgres和jsonb - 在任何键上搜索值

3 个答案: