SQLCODE = -203 when running GTXMSKL job on z/OS

Products

• CA Test Data Manager (Data Finder / Grid Tools)

Issue/Introduction

When I am trying to GTXMAP job on the Mainframe,  I run into the following issue:
ERROR MESSAGE when executing mainframe JCL job GTXMSKL 
Program name GTXMAP 
Program version 5.0.1
Program date 2014-06-09
Program GTXMSKL
Program version 5.1.1
Program date 2016-07-08
SQL ERROR: See REPORT for further info
CUSTOMER_ID
DSNT408I SQLCODE = -203, ERROR: A REFERENCE TO COLUMN CUSTOMER_ID IS
AMBIGUOUS
DSNT418I SQLSTATE = 42702 SQLSTATE RETURN CODE

READY 
DSN SYSTEM(C10V)
DSN
RUN PROGRAM(GTXMSKL) PLAN(GTXMSKL) LIB('GRIDDEMO.LOADLIB') 

I see I am getting a SQLCODE = -203  What is causing this issue?

Environment

TDM for Mainframe 5.4
Test Data Manager

Resolution

The issue is that you are running into an ambiguous error with a query that you are trying to mask with.

Assume you have these two tables:
Order
(id, quantity_on_hand, price, instock)

Detail
(id, orderid, partcode, instock)

and your masking query was this:
select * from order, detail
where order.id = detail.orderid and
stock = 3

You would generate SQLCODE -203 error on the stock field, since the query did not indicate to use the stock field from the order table or the detail table.
To address this issue, you would change your query to:

select * from order, detail
where order.id = detail.orderid and
order.stock = 3

 

This would resolve your SQLCODE = -203 error.