How to create unique sequence number

Question

Hello,
I'm new to ODI and trying to learn. Below is the requirement. Please advise.
I'm trying to load data from one database (oracle) to another database table (AS400). But when i load the data into AS400, I need to create a unique ID for each record and write this unique ID to one of the fields in AS400.
I don't have any issues loading the data from oracle to AS400. But I'm unable to generate a unique ID for each record. Can any share your thoughts how to get this.
Thanks for your help.

Answer 1

Hi ,
First, on the DB2/400 instance, create a table containing an Identity column:
CREATE TABLE THE_IDENTITY_TAB
(THE_IDENTITY_COL DECIMAL(31,0) GENERATED ALWAYS AS IDENTITY
START WITH 1000,
INCREMENT BY 1);
Second, in the same DB2/400 instance, create a function that returns an incremented number from the Identity column:
CREATE FUNCTION NEXT_IDENTITY_COL () RETURNS DECIMAL(31,0)
LANGUAGE SQL
MODIFIES SQL DATA
BEGIN
INSERT INTO THE_IDENTITY_TAB VALUES (DEFAULT);
DELETE FROM THE_IDENTITY_TAB;
RETURN (SELECT identity_val_local() FROM QSYS2.QSQPTABL);
END
Finally, in Designer, use the snpRef.getObjectName() substitution method to refer to the DB2/400 function in the interface's mapping for the appropriate field:
<%=snpRef.getObjectName("L","NEXT_IDENTITY_COL","<LOGICAL_SCHEMA_NAME>","D")%>()
Thanks,
Sutirtha