Scenario:
Ibland har vi krav på att aktivera CDC på tabell inklusive alla kolumner ELLER aktivera CDC på tabell med uppsättning kolumner. SP:n kan utföra båda uppgifterna beroende på angivna parametrar. Denna lagrade procedur kommer att användas när CDC redan inte är aktiverat i tabellen. Om Change Data Capture (CDC) redan är aktiverat i Tabell , kommer den lagrade proceduren inte att utföra någon åtgärd.Lösning:
Nedan lagrade procedur kan användas för att aktivera CDC på alla kolumner i en tabell eller valfria kolumner.USE [DatabaseName] GO
/*----------------------------------------------------------------------------------------------------- How to Execute: EXEC usp_EnableCdcOnTableWithOrWithoutColumnList @pSchemaName,@pTableName,@pColumnList Enable CDC on Table with All columns Example :usp_EnableCdcOnTableWithOrWithoutColumnList 'SchemaName','TableName',NULL Enable CDC on Table with Given columns Example :usp_EnableCdcOnTableWithOrWithoutColumnList 'SchemaName','TableName','Col1,Col2' ---------------------------------------------------------------------------------------------------------*/
SET ANSI_NULLS ON GO SET QUOTED_IDENTIFIER ON GO CREATE PROCEDURE [dbo].[Usp_enablecdcontablewithorwithoutcolumnlist]
@pSchemaName VARCHAR(50),--> Provide the Schema Name where table exists
@pTableName VARCHAR(100),--> TableName to ENABLE CDC ON.
@pColumnList VARCHAR(1000)--> ColumnList eg.'col1,col2'
AS BEGIN --DECLARE LOCAL VARIABLES DECLARE @vSQLStatment NVARCHAR(MAX) DECLARE @vSQLEnableCDC NVARCHAR(MAX) DECLARE @vXML XML; DECLARE @vCDCEnableInd INT DECLARE @vColumnCount INT -- IF CDC ALREADY ENABLED SET @vCDCEnableInd=(SELECT is_tracked_by_cdc FROM sys.tables WHERE name = @pTableName) -- CHECK IF CORRECT TABLE NAME IS PROVIDED IF NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = @pTableName) BEGIN PRINT ' The given table does not exists in Database::' + @pTableName END -- ENABLE CDC WITH ALL THE COLUMNS IF NO COLUMNS PROVIDED ELSE BEGIN IF @pColumnList IS NULL AND @vCDCEnableInd = 1 BEGIN PRINT 'CDC is alrady enabled on ::' + @pTableName END IF @pColumnList IS NULL AND @vCDCEnableInd = 0 BEGIN SELECT @vSQLStatment = 'EXEC sys.sp_cdc_enable_table @source_schema = ''' + @pSchemaName + ''', @source_name = ''' + @pTableName + ''', @role_name = null;' EXEC sp_executesql @vSQLStatment PRINT ' CDC Enabled on ::' + @pTableName + ' for all the columns' END -- IF COLUMN LIST IS PROVIDED FOR CDC IF ( LEN(@pColumnList) > 0 ) BEGIN SET @vXML=CAST('' + REPLACE(@pColumnList, ',', '') + ' ' AS XML); -- CHECK IF Incorrect COLUMN NAME IS PROVIDEDED SELECT @vColumnCount = COUNT(*) FROM @vXML.nodes('/a') AS R(nref) WHERE NOT EXISTS (SELECT 1 FROM INFORMATION_SCHEMA.COLUMNS I WHERE I.TABLE_NAME = @pTableName AND I.COLUMN_NAME = nref.value('.', 'nvarchar(50)')) IF ( @vColumnCount <> 0 ) PRINT ' The List of Columns provided do not exit in Source Table.Check the ColumnList' -- IF All columns Exists in Source Table, Enable CDC IF ( @vColumnCount = 0 AND @vCDCEnableInd = 1 ) BEGIN PRINT ' The CDC is already Enabled for this table.' END IF ( @vColumnCount = 0 AND @vCDCEnableInd = 0 ) BEGIN --Enable CDC SET @vSQLEnableCDC='EXEC sys.sp_cdc_enable_table @source_schema=''' + @pSchemaName + ''',@source_name=''' + @pTableName + ''', @role_name=NULL, @captured_column_list= ''' + @pColumnList + '''' EXEC (@vSQLEnableCDC) PRINT ' CDC Enabled on ::' + @pTableName + ' for ' + @pColumnList + ' Columns.' END END END END