Question

I have a package with two variables that has constant values like below.

person_name              CONSTANT VARCHAR2 (15)           := 'Adam';
person_city              CONSTANT VARCHAR2 (15)           := 'Houston';

This package variables are used across my database in stored procedures, other packages etc.

Now i want these variables to have values based on the client server who is calling. And i have all these maintained in a table like below

Server      Parameter       Value
Server1     person_name     Adam
Server1     person_city     Houston
Server2     person_name     Victor
Server2     person_city     Dallas

So when the package/SP is referenced/called from server1, i want my person_name and person_city to be defaulted to Adam and Houston.
Similarly when the package/SP is referenced/called from server2, i want my person_name and person_city to be Victor and Dallas.

How can this be done? Is there anyway in oracle side, the client who is calling a particular SP or using a package variable? I wrote a function to get the value like below.

in package, 
person_name     CONSTANT VARCHAR2 (15)      :=GETPARAMVALUE(person_name);
person_city     CONSTANT VARCHAR2 (15)      :=GETPARAMVALUE(person_city);

and in the function, i will query the table

select * from parameterstable where parameter = (function's input) and servername = ???? 

How will i know the servername here?

Any help/tips will be appreciated. Thanks

Answer 1

Assuming that server1 and server2 are the client machines that are connecting to your server,

SYS_CONTEXT( 'USERENV', 'HOST' )

should return the name of the client machine. You can use that in your GetParamValue function to determine which row in the configuration table to read.