srv_message_handler (Extended Stored Procedure API)

Important

This feature will be removed in a future version of Microsoft SQL Server. Do not use this feature in new development work, and modify applications that currently use this feature as soon as possible. Use CLR integration instead.

Calls the installed Extended Stored Procedure API message handler. This function is usually used to call Microsoft SQL Server from an extended stored procedure to log an error (defined by the extended stored procedure) in the SQL Server error log file or the Microsoft Windows application log.

Syntax

int srv_message_handler (
SRV_PROC *
srvproc
,
int
errornum
,
BYTE 
severity
,
BYTE
state
,
int
oserrnum
,
char *
errtext
,
int
errtextlen
,
char *
oserrtext
,
int
oserrtextlen
);

Arguments

• srvproc
  Is a pointer to the SRV_PROC structure that is the handle for a particular client connection. The srvproc parameter contains information that is used to manage communication and data between the application and the client.

• errornum
  Is an error number defined by the extended stored procedure. This number must be from 50,001 through 2,147,483,647.

• severity
  Is a standard SQL Server severity value for the error. This number must be from 0 through 24.

• state
  Is a SQL Server state value for the error.

• oserrnum
  Is the operating-system error number. This argument is ignored.

• errtext
  Is the description of the extended stored procedure error errornum.

• errtextlen
  Is the length of the extended stored procedure error string errtext.

• oserrtext
  Is the description of the operating-system error oserrnum. This argument is ignored.

• oserrtextlen
  Is the length of the operating-system error string oserrtext.

Returns

SUCCEED or FAIL.

Remarks

The srv_message_handler function enables an extended stored procedure to integrate with the centralized error logging and reporting features of SQL Server. SQL Server alerts can be established for events from extended stored procedures, and SQL Server Agent will monitor for these alert conditions.

If the error message is longer, it is truncated to 412 bytes.

Security Note
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 this Microsoft Web site.