Question

我正在尝试一个存储过程如下。

CREATE OR REPLACE FUNCTION "public"."get_fees" (VARCHAR(5000)) RETURNS text[] AS 
$body$
DECLARE
student_ids ALIAS FOR $1;
studetFee text[];
BEGIN
FOR studetFee IN
  SELECT * FROM Student_fee WHERE student_id IN ( student_ids::VARCHAR(5000) )
LOOP
   **** some *** 
END LOOP;
END;
$body$

我在尝试此查询时显示以下错误

SELECT * FROM get_fees( '1,2,3,4,5'::VARCHAR(5000) ); 

ERROR:  operator does not exist: dom_id = character varying at character 65
HINT:  No operator matches the given name and argument type(s). You might need to add explicit type casts.

可能是什么问题。

由于拉胡

Answer 1

尝试：

...WHERE student_id = any(( string_to_array(student_ids,',') )

https://www.postgresql.org/docs/current/static/functions-array.html

Answer 2

你不能做“其中student_id in（varchar）”你必须将字符串解析成一个列表。

Answer 3

studetFee必须是记录类型

错误：运算符不存在：dom_id =在字符65处变化的字符在Postgres SQL中

3 个答案: