Clients can send two types of requests to TRS:
SQL language requests
Remote procedure calls (RPCs)
Requests can be sent to TRS two ways:
Direct requests are RPCs or SQL language statements that access TRS without an intermediary server.
Indirect requests invoke an RPC on Adaptive Server, ASE/CIS or Replication Server, which then sends a request to TRS.
If you are using the Mainframe Connect DB2 UDB Option, TRS directs requests to the AMD2 transaction at the mainframe. If you are using Mainframe Connect DB2 UDB for CICS and IMS, TRS directs requests to the SYRT transaction at the mainframe. (See “Configuring a default SQL language handler for TRS”.)
Clients can send SQL language requests and RPCs to the AMD2 transaction. TRS handles any request sent indirectly (that is, through Adaptive Server) as an RPC. Long-running transactions cannot be sent through Adaptive Server because Adaptive Server logs out of TRS after each request. This is not true for ASE/CIS.
