Choice field values from existing records from mysql db

How can i put the actually logged user id to WHERE option in this form?

“{userid}” and {userid} doesn’t work..

When i type number of user in this windows(for example WHERE ID = 1) it works,that doesn’t have sense but confirms it works.
How do I insert here the WP ‘userid’ for the form?

https://i68.tinypic.com/2ly249t.png

@labed2007,

The form is not designed for the stated purpose. Though it works with MySQL mapping and if you insert the data using the form you can write a query to display it in another location. As for the userid, it cannot be used. Only username of the logged in user can be used within MySQL mapping. Thank you.

How to call a actually logged user username at a single choice option in form field?

Dear labed2007,

The field cannot be called within the form. It can be used only within Emails/Submissions and Database/MySQL section. Thank you.