EnumLogReaderAgentSessions2 Method

未來的 Microsoft SQL Server 發行版本將不再提供此功能。請避免在新的開發工作中使用此功能，並計劃修改目前使用此功能的應用程式。

The EnumLogReaderAgentSessions2 method returns a QueryResults object that enumerates execution status data for the Log Reader Agent specified.

語法

object
.EnumLogReaderAgentSessions2(
AgentName
,
SessionType
, 
SessionDuration
,
lEstimatedNumRecords
)
as 
QueryResults

Parts

• object
  Expression that evaluates to an object in the Applies To list.

• AgentName
  String that identifies a Log Reader Agent by name.

• SessionType
  Long integer that indicates session type as described in Settings.

• SessionDuration
  Long integer that specifies a number of hours. Restricts result set membership to those sessions launched within the number of hours specified. Use 0 to specify no restriction on agent session start time.

• lEstimatedNumRecords
  Long integer that specifies the estimated number of QueryResults rows to return.

Prototype (C/C++)

HRESULT EnumLogReaderAgentSessions2(
SQLDMO_LPCSTR AgentName,
SQLDMO_SESSION_TYPE SessionType,
long SessionDuration,
long lEstimatedNumRecords,
LPSQLDMOQUERYRESULTS* ppResults);

Settings

Set SessionType using these values.

Constant	Value	Description
SQLDMOSession_All	1	Output contains log information for all sessions for agent.
SQLDMOSession_Errors	2	Output contains log information only for those execution attempts ending in error.

Returns

A QueryResults object that contains one result set defined by these columns.

Column	Data type	Description
runstatus	integer	Executing state. Interpret using SQLDMO_TASKSTATUS_TYPE.
start_time	nvarchar(26)	Date and time of last scheduled execution.
time	nvarchar(26)	Date and time of message logging.
comments	nvarchar(256)	Descriptive text.
duration	integer	Elapsed time of the session in seconds.
delivery_rate	float	Average number of commands delivered per second.
delivery_latency	integer	Latency, in milliseconds, between the Publisher committing a transaction and that transaction entering the distribution database.
delivery_time	integer	Cumulative time measurement for delivery in seconds.
delivered_/transactions	integer	Cumulative number of transactions delivered in the session.
delivered_commands	integer	Cumulative number of commands delivered in the session.
average_commands	integer	Average number of commands per transaction delivered in the session.
action_count	integer	Number of session history records.
error_id	integer	When nonzero, Microsoft SQL Server error message number.

備註

In the result set, date and time data returned in start_time and time is formatted as YYYYMMDD hh:mm:ss.fff.

Date part	Description
YYYY	Represents the year in four digits.
MM	Represents the month in two digits (zero padded).
DD	Represents the day of the month in two digits (zero padded).
hh	Represents the hour using two digits, a twenty-four hour clock (zero padded).
mm	Represents the minute in two digits (zero padded).
ss	Represents the second in two digits (zero padded).
fff	Represents the fractional part of the second in three digits.

For example, the value 20040512 18:12:00.000 is interpreted as 6:12 P.M., May 12, 2004.

The EnumLogReadAgentSessions2 method differs from the EnumLogReaderAgentSessions method by including the lEstimatedNumRecords parameter, which allows the application to pass an estimated number of QueryResults rows. This allows an application to avoid the performance overhead associated with repeatedly allocating and freeing memory.

Applies To:

DistributionPublisher2 Object