The following bug has been logged on the website:
Bug reference: 16058
Logged by: Shaoqi Bai
Email address: sbai(at)pivotal(dot)io
PostgreSQL version: 9.6.12
Operating system: Darwin
Description:
Actual
postgres=# show session_user;
ERROR: syntax error at or near "session_user" at character 6
STATEMENT: show session_user;
ERROR: syntax error at or near "session_user"
LINE 1: show session_user;
^
Expected
postgres=# show session_user;
ERROR: unrecognized configuration parameter "session_user"
STATEMENT: show session_user;