查询，用逗号分隔PLSQL中的IN参数

Question

我在Oracle 11g中编写了以下内容来分隔IN params（I_PRODUCT）并进行查询。当我给出一个参数作为i_PRODUCT时，它正在填充一些结果。当我插入多个逗号分隔参数时，我期望逐个查询并填充整个结果，并且它不起作用。

create or replace PROCEDURE RQUERY 
(
I_PRODUCT VARCHAR2 
, O_Cursor OUT SYS_REFCURSOR 
) AS BEGIN 
O_Cursor := NULL; 
OPEN O_Cursor for 

SELECT * FROM Table1 WHERE 
Table1.PRODUCT LIKE (select regexp_substr(I_PRODUCT,'[^,]+', 1, level) from dual 
        connect by regexp_substr(I_PRODUCT, '[^,]+', 1, level) is not null); 

END RQUERY ; 

Answer 1

SELECT * FROM Table1 WHERE 
Table1.PRODUCT LIKE (select regexp_substr(I_PRODUCT,'[^,]+', 1, level) from dual 
        connect by regexp_substr(I_PRODUCT, '[^,]+', 1, level) is not null); 

的LIKE运营商将无法在上面的查询。您需要使用IN，这将在内部评估为多个或。

Table1.PRODUCT IN (select regexp_substr(I_PRODUCT,'[^,]+', 1, level) from dual 
        connect by regexp_substr(I_PRODUCT, '[^,]+', 1, level) is not null); 

此外，关于varying IN list，看看我的回答here。

更新

基于OP的评论。

修改查询为：

WITH str_search AS 
(
    select regexp_substr(I_PRODUCT,'[^,]+', 1, level) pattern from dual 
    connect by regexp_substr(I_PRODUCT, '[^,]+', 1, level) is not null 
) 
SELECT * 
FROM  Table1 
WHERE  EXISTS (
      SELECT  NULL 
      FROM  str_search 
      WHERE  tab.col  LIKE pattern 
       ); 

Answer 2

使用IN而不是like;

Table1.PRODUCT IN( 
    select regexp_substr(I_PRODUCT,'[^,]+', 1, level) from dual 
    connect by regexp_substr(I_PRODUCT, '[^,]+', 1, level) is not null 
) 

Answer 3

create or replace PROCEDURE ProcedureName 
(
    I_PRODUCT IN VARCHAR2 :=NULL, 
    O_Cursor OUT SYS_REFCURSOR 
) 
AS 
BEGIN 
    DECLARE I_PRODUCT_ VARCHAR2(1000); 
BEGIN 
     I_PRODUCT_ := ',' || nvl(I_PRODUCT,'') || ','; 
     Open O_Cursor FOR 
     SELECT * FROM Table1 WHERE 1=1 
     And (I_PRODUCT_ = ',,' Or I_PRODUCT_ Like '%,' || I_PRODUCT ||',%'); 
    END; 
END ProcedureName;