Teradata : How to get the server name using query

问题

How can I get the server name using query in Teradata? That is, if I am writing a query on the 'dev' server, it should return the dev server name.

for example, in Sybase : we will be using select @@servername.

回答1:

There's nothing like @@servername in TD. You might create a SQL UDF on each server returning the name, e.g.

REPLACE FUNCTION syslib.#servername ()
RETURNS VARCHAR(30)
LANGUAGE SQL
CONTAINS SQL
DETERMINISTIC
RETURNS NULL ON NULL INPUT
SQL SECURITY DEFINER
COLLATION INVOKER
INLINE TYPE 1
RETURN 'dev'

If it's created in syslib it can be accessed without qualifying it like this:

SELECT #servername();

回答2:

SELECT CASE 
         WHEN LogonSource LIKE '%UAT%'  THEN 'UAT' 
         WHEN LogonSource LIKE '%PROD%' THEN 'Prod' 
         ELSE 'Unknown' 
       END DatabaseName 
FROM   DBC.SessionInfoV 
WHERE  UserName = 'myname';

来源：https://stackoverflow.com/questions/24982325/teradata-how-to-get-the-server-name-using-query