Question

在Android游戏中，用户可以通过Google+，Facebook，Twitter登录：

当应用程序连接到PostgreSQL / PHP后端时，它会发送一个社交ID列表，并将它们存储在sid表中的social列中：

create table social (
        sid varchar(255) not null,
        auth char(32) not null,

        social integer not null check (0 <= social and social <= 6),
        given varchar(255) not null check (given ~ '\S'),
        photo varchar(255) null check (photo ~* '^https?://...'),

        stamp timestamp not null,
        ip inet not null,
        uid integer not null references users on delete cascade,
        primary key(sid, social)
);

在名为users的另一个表格中，我将自动增加的用户ID保留为uid列，并使用它来跟踪他们的游戏，成就，玩家统计信息：

create table users (
        uid serial primary key,

        created timestamp not null,
        stamp timestamp not null,

        banned_until timestamp null,
        banned_reason varchar(255) null
);

在PHP登录脚本中，我尽可能合并社交帐户 -

通过接收所有收到的 sids ，找到相应的 uids ，然后取最低找到 uid 并更新social表中的记录使用最低 uid 。

这在PHP中已经很好用，但现在我试图将合并功能转移到PostgreSQL存储函数中：

CREATE OR REPLACE FUNCTION merge_users(
        IN in_users jsonb,
        IN in_ip inet,
        OUT out_uid integer) AS
$func$
DECLARE
        user jsonb;
BEGIN
        SELECT MIN(uid) INTO out_uid FROM social
        WHERE sid IN (SELECT u->>'sid' FROM JSONB_ARRAY_ELEMENTS(in_users) u);

        IF FOUND THEN
                UPDATE words_social SET uid=out_uid
                WHERE sid IN (SELECT u->>'sid' FROM JSONB_ARRAY_ELEMENTS(in_users) u);
        ELSE
                INSERT INTO words_users (created, stamp)
                VALUES (current_timestamp, current_timestamp)
                RETURNING uid INTO out_uid;
        END IF;

        FOR user IN SELECT * FROM JSONB_ARRAY_ELEMENTS(in_users)
        LOOP
                RAISE NOTICE 'user sid = %', user->>'sid';

                UPDATE social SET
                        auth   = user->'auth',
                        social = user->'social',
                        given  = user->'given',
                        photo  = user->'photo',
                        stamp  = TO_TIMESTAMP(user->'stamp'),
                        ip     = in_ip,
                        uid    = out_uid
                WHERE sid = user->>'sid';

                IF NOT FOUND THEN
                        INSERT INTO social (
                                sid,
                                auth,
                                social,
                                given,
                                photo,
                                stamp,
                                ip,
                                uid
                        ) VALUES (
                                user->'sid',
                                user->'auth',
                                user->'social',
                                user->'given',
                                user->'photo',
                                TO_TIMESTAMP(user->'stamp'),
                                in_ip,
                                out_uid
                        );
                END IF;
        END LOOP;
END
$func$  LANGUAGE plpgsql;

不幸的是，上面的代码会输出语法错误消息：

# select * from merge_users(
'[{"sid":"12345284239407942","auth":"ddddc1808197a1161bc22dc307accccc","social":3,"given":"Alexander1","family":"Farber","photo":"https:\/\/graph.facebook.com\/10154284239407942\/picture?type=large","place":"Bochum, Germany","female":0,"stamp":1450102770},{"sid":"54321284239407942","auth":"ddddc1808197a1161bc22dc307abbbbb","social":4,"given":"Alexander2","family":"Farber","photo":null,"place":"Bochum, Germany","female":0,"stamp":1450102800}]'::jsonb);

NOTICE:  min uid = <NULL>
ERROR:  operator does not exist: name ->> unknown
LINE 1: SELECT user->>'sid'
                   ^
HINT:  No operator matches the given name and argument type(s). You might need to add explicit type casts.
QUERY:  SELECT user->>'sid'
CONTEXT:  PL/pgSQL function words_merge_users(jsonb) line 15 at RAISE

我在上面的代码中尝试将::jsonb附加到u和user，但它没有帮助。

迭代jsonb数组：运算符不存在：name - ＆gt;＆gt;未知

0 个答案: