将 json 对象数组插入 postgres 的查询

我有一张带字段的表fields json[]。我创建了一个函数来将记录插入到该表中，这是调用

select * from add('[{"name":"Yes","value":"yes"},{"name":"No","value":"no"},{"name":"Neutral","value":"neutral"}]') as result;

这是函数本身

CREATE OR REPLACE FUNCTION public.add(
    _fields json[]) RETURNS SETOF json 
LANGUAGE 'plpgsql'
AS $BODY$
     DECLARE
        query text;
    BEGIN
        insert into my_table(fields)
          values(_fields);
        query = 'SELECT json_build_object(''message'', ''Added.'')';
        RETURN QUERY EXECUTE query; 
        END;
$BODY$;

但这表明

malformed array literal: "[{"name":"Yes","value":"yes"},{"name":"No","value":"no"},{"name":"Neutra

然后我尝试了这个

select * from add('{"name":"Yes","value":"yes"},{"name":"No","value":"no"},{"name":"Neutral","value":"neutral"}') as result;

函数中的插入语句如下

insert into polls(fields) values(array([''||_fields||'']::json[]));

这表明

syntax error at or near "["

我失踪了"对于每个单独的对象。这是创建 json 对象的方法

{"{\"name\":\"Yes\",\"value\":\"yes\"}","{\"name\":\"No\",\"value\":\"no\"}","{\"name\":\"Neutral\",\"value\":\"neutral\"}"}

所以最终的查询是

select * from add('{"{\"name\":\"Yes\",\"value\":\"yes\"}","{\"name\":\"No\",\"value\":\"no\"}","{\"name\":\"Neutral\",\"value\":\"neutral\"}"}') as result;