SET SESSION COLLATION is not valid in 2PC sessions.
Character data is sorted in ascending order unless the DESC (descending) option is included in the SQL request.
Vantage converts data characters to their uppercase values for comparison and sorting operations unless the CASESPECIFIC option is included in the SQL request, or was defined at creation time for the column being queried. The results of CASESPECIFIC on sorted results is described in Teradata Vantage™ - SQL Data Manipulation Language, B035-1146.