Query with comma seperated IN parameters in PLSQL

问题

I wrote the following in Oracle 11g to separate IN params (I_PRODUCT)and make a query. When I give one parameter as the i_PRODUCT, it is populating some results. When I am inserting multiple comma separated parameters, I am expecting to query one by one and populate the entire result and it is not working.

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 ;

回答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);

The LIKE operator would fail in above query. You need to use IN, which would internally be evaluated as multiple OR.

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

Also, regarding varying IN list, have a look at my answer here.

Update

Based on OP's comments.

Modify the query as:

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
                 );

回答2:

 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;

回答3:

use IN instead of like;

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

来源：https://stackoverflow.com/questions/33126779/query-with-comma-seperated-in-parameters-in-plsql

标签

Oracle

plsql

oracle11g