संपूर्ण तालिका पर परिवर्तन डेटा कैप्चर (सीडीसी) को कैसे सक्षम करें या SQL सर्वर में कॉलम की सूची के साथ तालिका में सीडीसी को सक्षम करें

परिदृश्य:

समाधान:

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