Question

我正在努力将JSON对象存储到Postgresql数组中..我做了类似的事情 -

CREATE TABLE rock_band
(
   name text,
   members VARCHAR(200) []
);

INSERT INTO rock_band VALUES ('Linkin Park','{"Name":"Chester" , "age" : "38"}');

ERROR:  malformed array literal:

关于我们如何将json存储到Postgresql数组然后将更多json对象附加到同一数组的任何指导/指示。

此外，如果我们可以在Postgresql数组中存储JSON对象，那么我们是否可以存储HSTORE值。

---更新---

好的，在heapanalytics的其中一个人的帮助下，我能够将值作为JSON对象的数组插入

CREATE TABLE rock_band (
  name TEXT,
  members JSON[]  <<--- This is changed now as compared to last one 
);

INSERT INTO rock_band VALUES ('The Who', '{}');

要附加到我执行的数组：

UPDATE rock_band SET members = array_append(members, '{"name":"Roger Daltry", "age":61}')     WHERE name = 'The Who';

然后我得到这样的东西 -

select * from rock_band;
  name   |                                     members
---------+----------------------------------------------------------------------------------
 The Who | {"{\"name\":\"Roger Daltry\", \"age\":61}","{\"name\":\"Chester\", \"age\":38}"}
(1 row)

但现在的问题是如何查询它，比如 -

 test=# select members from rock_band where 'Chester' = ANY(members->'name');
 ERROR:  operator does not exist: json[] -> unknown
 LINE 1: ...mbers from rock_band where 'Chester' = ANY(members->'name');
                                                         ^
 HINT:  No operator matches the given name and argument type(s). You might need to add explicit type casts.

有什么建议吗？

Answer 1

我没有真正看到问题，这完全在文档中这是一个例子：http://sqlfiddle.com/#!15/864bf/7

E.g。

SELECT name FROM (SELECT name, members, generate_subscripts (members, 1) AS s FROM rock_band) AS foo
  WHERE members[s]->>'Name' = 'Chester';

PostgreSQL数组中的JSON / HSTORE

1 个答案: