将新列添加到为更改数据捕获 (cdc) 配置的表时,捕获实例表将没有新列,直到为源表禁用并重新启用 cdc。在此过程中,现有的捕获实例被删除。
我想我可以将现有数据复制到临时表中,然后使用以下 SQL 复制回来。但是,其他 CDC 元信息(例如 cdc.change_tables.start_lsn)变得无效。
如果有的话,如何使用相同的捕获实例名称保留捕获实例历史记录?
谢谢,丰富
/*Change Data Capture Test - Alter table definition test */
/*Enter restricted mode so we don't lose data changes during this process*/
alter database ChangeDataCaptureTest set AUTO_UPDATE_STATISTICS_ASYNC OFF
alter database ChangeDataCaptureTest set RESTRICTED_USER with ROLLBACK IMMEDIATE
go
/*Add a column to the table*/
alter table dbo.Table1 add value3 varchar(20) DEFAULT '' not null
/*Copy the existing change tracking into a temp table*/
select * into cdc.dbo_Table1_temp from cdc.dbo_Table1_CT
/*Add the new column to the temp table so that we don't have to map
all columns when we copy back, note that we use NULL as the default*/
alter table cdc.dbo_Table1_temp add value3 varchar(20) DEFAULT NULL
/*Disable CDC on the source table, this will drop the associated cdc table*/
exec sys.sp_cdc_disable_table
@source_schema='dbo',
@source_name='Table1',
@capture_instance='dbo_Table1'
/*Enable CDC for the table which recreates the CDC table*/
EXEC sys.sp_cdc_enable_table
@source_schema = N'dbo',
@source_name = N'Table1',
@role_name = NULL,
@supports_net_changes = 1,
@filegroup_name = N'ChangeDataCapture'
GO
/*Insert values from the temp table back into the new CDC Table*/
Insert into cdc.dbo_Table1_CT
SELECT *
From cdc.dbo_Table1_temp
go
/*Drop the temp table*/
drop table cdc.dbo_Table1_temp
/*Go back into multi-user mode*/
alter database ChangeDataCaptureTest set AUTO_UPDATE_STATISTICS_ASYNC ON
alter database ChangeDataCaptureTest set MULTI_USER
go
/*Add a new row to the table*/
insert into table1
values(12,'zz','g')