How to find out query name in customer exit for variables

We use the same customer exit variable in different queries. In the customer exit we want to find out, which query has called the customer exit. With the technical query name we want to read a master data table entry.

e.g. If we come from query ZG1_TEST1 we want to use selection sel1

Query name | selection

-

ZG1_TEST1 | sel1

ZG1_TEST2 | sel2

How can we find out the query name in the customer exit for variables?

Thanks for your help,

Evi