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sys.sp_cdc_change_job (Transact-SQL)

  • Članak

Applies to: SQL Server

Modifies the configuration of a change data capture cleanup or capture job in the current database. To view the current configuration of a job, query the dbo.cdc_jobs table, or use sys.sp_cdc_help_jobs.

Transact-SQL syntax conventions

Syntax

syntaxsql 
sys.sp_cdc_change_job [ [ @job_type = ] N'job_type' ]
    [ , [ @maxtrans = ] max_trans ]
    [ , [ @maxscans = ] max_scans ]
    [ , [ @continuous = ] continuous ]
    [ , [ @pollinginterval = ] polling_interval ]
    [ , [ @retention ] = retention ]
    [ @threshold = ] 'delete threshold'
[ ; ]

Arguments

[ @job_type = ] N'job_type'

Type of job to modify. @job_type is nvarchar(20) with a default of capture. Valid inputs are capture and cleanup.

[ @maxtrans ] = max_trans

Maximum number of transactions to process in each scan cycle. @maxtrans is int, with a default of NULL, which indicates no change for this parameter. If specified, the value must be a positive integer.

@max_trans is valid only for capture jobs.

[ @maxscans ] = max_scans

Maximum number of scan cycles to execute in order to extract all rows from the log. @maxscans is int, with a default of NULL, which indicates no change for this parameter.

@max_scan is valid only for capture jobs.

[ @continuous ] = continuous

Indicates whether the capture job is to run continuously (1), or run only once (0). @continuous is bit, with a default of NULL, which indicates no change for this parameter.

  • When @continuous is 1, the sys.sp_cdc_scan job scans the log and processes up to (@maxtrans * @maxscans) transactions. It then waits the number of seconds specified in @pollinginterval before beginning the next log scan.

  • When @continuous is 0, the sp_cdc_scan job executes up to @maxscans scans of the log, processing up to @maxtrans transactions during each scan, and then exits.

  • If @continuous is changed from 1 to 0, @pollinginterval is automatically set to 0. A value specified for @pollinginterval other than 0 is ignored.

  • If @continuous is omitted or explicitly set to NULL and @pollinginterval is explicitly set to a value greater than 0, @continuous is automatically set to 1.

@continuous is valid only for capture jobs.

[ @pollinginterval ] = polling_interval

Number of seconds between log scan cycles. @pollinginterval is bigint, with a default of NULL, which indicates no change for this parameter.

@pollinginterval is valid only for capture jobs when @continuous is set to 1.

[ @retention ] = retention

Number of minutes that change rows are to be retained in change tables. @retention is bigint, with a default of NULL, which indicates no change for this parameter. The maximum value is 52494800 (100 years). If specified, the value must be a positive integer.

@retention is valid only for cleanup jobs.

[ @threshold = ] 'delete threshold'

Maximum number of delete entries that can be deleted using a single statement on cleanup. @threshold is bigint, with a default of NULL, which indicates no change for this parameter. @threshold is valid only for cleanup jobs.

Return code values

0 (success) or 1 (failure).

Result set

None.

Remarks

If a parameter is omitted, the associated value in the dbo.cdc_jobs table isn't updated. A parameter set explicitly to NULL is treated as though the parameter is omitted.

Specifying a parameter that is invalid for the job type causes the statement to fail.

Changes to a job don't take effect until the job is stopped by using sys.sp_cdc_stop_job and restarted by using sys.sp_cdc_start_job.

Permissions

Requires membership in the db_owner fixed database role.

Examples

A. Change a capture job

The following example updates the @job_type, @maxscans, and @maxtrans parameters of a capture job in the AdventureWorks2022 database. The other valid parameters for a capture job, @continuous and @pollinginterval, are omitted; their values aren't modified.

SQL 
USE AdventureWorks2022;
GO

EXECUTE sys.sp_cdc_change_job
    @job_type = N'capture',
    @maxscans = 1000,
    @maxtrans = 15;
GO

B. Change a cleanup job

The following example updates a cleanup job in the AdventureWorks2022 database. All valid parameters for this job type, except @threshold, are specified. The value of @threshold isn't modified.

SQL 
USE AdventureWorks2022;
GO

EXECUTE sys.sp_cdc_change_job
    @job_type = N'cleanup',
    @retention = 2880;
GO

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