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2.2.2.5 Return Status

When a stored procedure is executed by the server, the server MUST return a status value. This is a 4-byte integer and is sent via the RETURNSTATUS token. A stored procedure execution is requested through either an RPC Batch or a SQL Batch (section 2.2.1.4) message. For more details about RETURNSTATUS, see section 2.2.7.18.