srv_pfield (Extended Stored Procedure API)
Applies to: 
SQL Server
Important
This feature will be removed in a future version of SQL Server. Avoid using this feature in new development work, and plan to modify applications that currently use this feature. Use CLR integration instead.
Returns information about a database connection.
Syntax
DBCHAR * srv_pfield (
SRV_PROC *
srvproc
,
int
field
,
int *
len
);
Arguments
srvproc
Pointer identifying a database connection.
field
Specifies data on the connection to return.
| Value | Returns |
|---|---|
| SRV_APPLNAME | The application name provided by the client when it established the connection. |
| SRV_BCPFLAG | A flag that is TRUE if the client is preparing for a bulk copy operation; otherwise, FALSE. |
| SRV_CLIB | The name of the library that enables the client to talk to a server. |
| SRV_CPID | The client process ID on the client source computer. |
| SRV_HOST | The name of the client's machine provided by the client when it established the connection. |
| SRV_LIBVERS | The version of the client library. |
| SRV_LSECURE | A flag. TRUE if the connection used integrated security to login. |
| SRV_NETWORK_MODULE | The name of the Net-Library DLL used by the connection. |
| SRV_NETWORK_VERSION | The version of the Net-Library DLL used by the connection. |
| SRV_NETWORK_CONNECTION | The connection string passed to the Net-Library DLL used for the current srvproc connection. |
| SRV_PIPEHANDLE | A string containing the pipe handle of a connected client, or NULL if the client is connected on a network that does not use named pipes. To use this handle as a valid pipe handle with Microsoft Windows, convert this string to an integer. |
| SRV_RMTSERVER | The server from which the client process is logged in. If the login is from a client, this value is an empty string. |
| SRV_ROWSENT | The number of rows already sent by srvproc for the current set of results. |
| SRV_SPID | The server thread ID of the srvproc. For extended stored procedures, this value is the same as the kpid column of sys.sysprocesses, and it can change over time. |
| SRV_SPROC_CODEPAGE | Codepage that the server uses to interpret multibyte data. |
| SRV_STATUS | The current status of srvproc: running or closed |
| SRV_TYPE | The connection type of srvproc. If server is returned, srvproc is from an instance of SQL Server. If client is returned, srvproc is from a DB-Library or ODBC client. |
| SRV_USER | The user name of the connection. |
len
Is a pointer to an int variable that contains the length of the returned field value. If len is NULL, the length of the string is not returned.
Returns
A pointer to a null-terminated string containing the current value for the specified field in the SRV_PROC structure. If the field is empty, a valid pointer to an empty string is returned and len contains 0. If the field is unknown, NULL is returned and len contains the value -1.
Important
You should thoroughly review the source code of extended stored procedures, and you should test the compiled DLLs before you install them on a production server. For information about security review and testing, see the Security Developer Center.