Opening an SQL Session: -uSQL 

Use

Option when Calling the Database Manager CLI

You need an SQL session to execute certain DBM Server commands.

If you specify this option this option, the DBM Server command for opening an SQL session is executed implicitly. An SQL session is established with the transferred operator data.

If no operator is specified with this option, the Database Manager CLI will use the data of the current DBM operator.

Operator details can be stored for various tasks with the help of the program XUSER and used for logging on.

Have a look at the significance of upper and lower case lettering on the meaning of the command.
-uSQL: Explicit specification of the operator with the <userid> and <password>
-USQL: Logon with an operator stored in the XUSER file.

See also: User Manual: SAP DB

Prerequisites

You are also using the option -d at the same time to specify a database instance and the option -u to log on to the DBM Server.

Syntax

-uSQL [<userid>,<password>]

or logon with XUSER: -USQL [<user_key>]