WHERE子句中的SQL IN运算符

以下查询：

SELECT SUM (peak_power) FROM t_mpi_pv WHERE info_id IN ( 
 SELECT mp_info_id FROM t_mp WHERE mp_id IN (
  ARRAY[29800001,29800008,29800015,29800022,29800029]
 )
)

不起作用。我得到一个错误：

运算符不存在：整数=整数[]

但是

工作

我做错了什么？

试试：

SELECT SUM (peak_power) FROM t_mpi_pv WHERE info_id IN ( 
 SELECT mp_info_id FROM t_mp WHERE mp_id IN 
  (29800001,29800008,29800015,29800022,29800029)
 )
)

---

或者，使用以下语法：

SELECT  SUM(peak_power)
FROM    t_mpi_pv
WHERE   info_id IN
        (
        SELECT  mp_info_id
        FROM    t_mp
        WHERE   mp_id = ANY(ARRAY[29800001,29800008,29800015,29800022,29800029])
        )

如果将数组作为单个绑定变量或函数的参数传递，则此选项非常有用：

CREATE FUNCTION fn_peak_power (mpids INT[])
AS
$$
        SELECT  SUM(peak_power)
        FROM    t_mpi_pv
        WHERE   info_id IN
                (
                SELECT  mp_info_id
                FROM    t_mp
                WHERE   mp_id = ANY($1)
                );
$$
LANGUAGE 'sql';

---

谢谢你的建议。

CREATE FUNCTION fn_peak_power (mpids INT[])
AS
$$
        SELECT  SUM(peak_power)
        FROM    t_mpi_pv
        WHERE   info_id IN
                (
                SELECT  mp_info_id
                FROM    t_mp
                WHERE   mp_id = ANY($1)
                );
$$
LANGUAGE 'sql';