Pass a list/array in DB2 stored procedure - list

Question

SELECT cc.clientid
FROM customer_client cc
GROUP BY cc.clientid
HAVING SUM(CASE WHEN cc.customerid IN (4567, 5678) THEN 1 ELSE 0 END) = COUNT(*)
AND COUNT(*) = 2;
I'm calling this query in a Db2 stored procedure where in I've to pass the list of customer id - any working suggestion?
I've tried passing it as below in procedure
CREATE PROCEDURE Find_Client_Customers (
IN IN_CUSTIDS VARCHAR(1000),
IN IN_CUST_COUNT INT)
but this is passing the list as a string.

Answer 1

You may use a string tokenizer:
create function regexp_tokenize_number(
source varchar(1024)
, pattern varchar(128))
returns table (seq int, tok bigint)
contains sql
deterministic
no external action
return
select seq, tok
from xmltable('for $id in tokenize($s, $p) return <i>{string($id)}</i>'
passing
source as "s"
, pattern as "p"
columns
seq for ordinality
, tok bigint path 'if (. castable as xs:long) then xs:long(.) else ()'
) t;
select *
from table(regexp_tokenize_number('123, 456', ',')) t;
SEQ TOK
--- ---
1 123
2 456
In your case:
SELECT cc.clientid
FROM customer_client cc
GROUP BY cc.clientid
HAVING SUM(CASE WHEN cc.customerid IN
(
select t.tok
from table(regexp_tokenize_number('4567, 5678', ',')) t
) THEN 1 ELSE 0 END) = COUNT(*)
AND COUNT(*) = 2;