KNOWLEDGE BASE

PostgreSQL Kerberos Constrained Delegation Login Fails when Using Mixed or Upper Case Usernames


Published: 22 Nov 2017
Last Modified Date: 28 Nov 2017

Issue

In Tableau Server, PostgreSQL SSO using Kerberos constrained delegation fails when using upper or mixed-case usernames. 
PostgreSQL database administrator will see the following PostgreSQL error: 
User does not exist
 

Environment

  • Tableau Server
  • PostgreSQL
  • Kerberos

Resolution

Work with your DBA and internal IT to properly map any upper- or mixed-case usernames in the pg_ident.conf file. 
 

Cause

The PostgreSQL database can only accept lowercase usernames for Kerberos delegation. 
 
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