DB2函数创建了Locks

Question

我创建了一个DB2用户定义的函数。该函数创建了锁，整个db2 studio在创建时挂起并显示-904消息。必须关闭并重新启动DB2。

CREATE FUNCTION LOOP_FN (CUSTOM_DIVISION_GROUP VARCHAR(255), COMPANY VARCHAR(255), LOCATION VARCHAR(255),COMD VARCHAR(255),BASIS VARCHAR(1)) 
     RETURNS VARCHAR(30)

BEGIN
    DECLARE COUNT_VAR INT;
    DECLARE j int;
    DECLARE NAMES_VAR varchar(30);
    DECLARE myTemp varchar(30);
    DECLARE CustomGroup varchar(30);

    SET CustomGroup = '';   
    SET j = 0;
    SET COUNT_VAR = LENGTH(CUSTOM_DIVISION_GROUP)-LENGTH(REPLACE(CUSTOM_DIVISION_GROUP,',',''));

    IF BASIS = 'N' THEN

    WHILE j <= COUNT_VAR DO

    SET NAMES_VAR = (SELECT VALUE_1 FROM TABLE(SPLIT_PARAMS(CUSTOM_DIVISION_GROUP,',',COUNT_VAR+2)) WHERE ID_1=j+1);
    IF (LOCATE(':', NAMES_VAR)>0) THEN 
    SET myTemp = SUBSTR(NAMES_VAR,1,LOCATE(':', NAMES_VAR)-1); 
    ELSE 
    SET myTemp = NAMES_VAR;
    END IF;

    IF LOCATE(COMPANY||LOCATION,NAMES_VAR) > 0 THEN
    SET CustomGroup = myTemp;
    END IF;
    SET j = j + 1;
    END WHILE;

    ELSEIF BASIS = 'Y' THEN
    WHILE j <= COUNT_VAR DO
    SET NAMES_VAR = (SELECT VALUE_1 FROM TABLE(SPLIT_PARAMS(CUSTOM_DIVISION_GROUP,',',COUNT_VAR+2)) WHERE ID_1=j+1);
    IF NAMES_VAR = COMPANY||LOCATION||COMD||'Y' THEN
    SET CustomGroup = 'True';
    END IF;
    IF NAMES_VAR = COMPANY||LOCATION||COMD||'N' THEN
    SET CustomGroup = 'False';
    END IF;
    SET j = j + 1;
    END WHILE;

    END IF;
    RETURN  CustomGroup;
END@

任何人都可以帮我解决问题并创建功能。我可以知道函数中的哪些语句会导致此问题。