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DBCC INPUTBUFFER (Transact-SQL)

Displays the last statement sent from a client to an instance of Microsoft SQL Server.

Topic link icon Transact-SQL Syntax Conventions

DBCC INPUTBUFFER ( session_id [ , request_id ])
[WITH NO_INFOMSGS ]

session_id

Is the session ID associated with each active primary connection.

request_id

Is the exact request (batch) to search for within the current session.

The following query returns request_id:

SELECT request_id 
FROM sys.dm_exec_requests 
WHERE session_id = @@spid;
WITH

Enables options to be specified.

NO_INFOMSGS

Suppresses all informational messages that have severity levels from 0 through 10.

DBCC INPUTBUFFER returns a rowset with the following columns.

Column name

Data type

Description

EventType

nvarchar(30)

Event type. This could be RPC Event or Language Event. The output will be No Event when no last event was detected.

Parameters

smallint

0 = Text

1- n = Parameters

EventInfo

nvarchar(4000)

For an EventType of RPC, EventInfo contains only the procedure name. For an EventType of Language, only the first 4000 characters of the event are displayed.

For example, DBCC INPUTBUFFER returns the following result set when the last event in the buffer is DBCC INPUTBUFFER(11).

EventType      Parameters EventInfo             
-------------- ---------- --------------------- 
Language Event 0          DBCC INPUTBUFFER (11)

(1 row(s) affected)

DBCC execution completed. If DBCC printed error messages, contact your system administrator.

Requires one of the following:

  • User must be a member of the sysadmin fixed server role.

  • User must have VIEW SERVER STATE permission.

  • session_id must be the same as the session ID on which the command is being run. To determine the session ID execute the following query:

    SELECT @@spid;
    

The following example runs DBCC INPUTBUFFER on a second connection while a long transaction is running on a previous connection.

CREATE TABLE dbo.T1 (Col1 int, Col2 char(3));
GO
DECLARE @i int = 0;
BEGIN TRAN
SET @i = 0;
WHILE (@i < 100000)
BEGIN
INSERT INTO dbo.T1 VALUES (@i, CAST(@i AS char(3)));
SET @i += 1;
END;
COMMIT TRAN;
--Start new connection #2.
DBCC INPUTBUFFER (52);

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