将PL/pgSQL SELECT转换为数组

Question

这是我的函数声明和正文的一部分:

CREATE OR REPLACE FUNCTION access_update()
RETURNS void AS $$
DECLARE team_ids bigint[];
BEGIN
    SELECT INTO team_ids "team_id" FROM "tmp_team_list";

    UPDATE "team_prsnl"
    SET "updt_dt_tm" = NOW(), "last_access_dt_tm" = NOW()
    WHERE "team_id" IN team_ids;
END; $$ LANGUAGE plpgsql;

我想team_ids成为一个我可以在UPDATE声明中使用的一组int .这个函数给我这样的错误:

psql:functions.sql:62: ERROR:  syntax error at or near "team_ids"
LINE 13:  AND "team_id" IN team_ids;

Answer 1

更快更简单的用FROM在您的条款UPDATE声明:

UPDATE team_prsnl p
SET    updt_dt_tm = now()
      ,last_access_dt_tm = now()
FROM   tmp_team_list t
WHERE  p.team_id = t.team_id;

除此之外,在使用数组操作时,该WHERE子句必须是

WHERE team_id = ANY (team_ids)

该IN构造使用集合,而不是数组.

Answer 2

要从 a 创建数组SELECT：

# select array(  select id from tmp_team_list ) ;
 ?column? 
----------
 {1,2}
(1 row)

该IN运算符被记录为对右侧操作数进行子查询。例如：

UPDATE team_prsnl SET updt_dt_tm = NOW()
 WHERE team_id IN (SELECT id FROM tmp_team_list);

也许您可以完全避免使用数组，或者尝试提供数组或select from team_ids.