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MergeArticle.FilterClause Property

Gets or sets the WHERE (Transact-SQL) clause that is evaluated to filter an article horizontally.

Namespace:  Microsoft.SqlServer.Replication
Assembly:  Microsoft.SqlServer.Rmo (in Microsoft.SqlServer.Rmo.dll)

public string FilterClause { get; set; }

Property Value

Type: String
A String value.

WHERE is not included in the filter clause.

If you set FilterClause after the initial snapshot has been created, a new snapshot must be generated.

The FilterClause property can be retrieved by members of the sysadmin fixed server role at the Publisher and at the Subscriber (for republishing Subscribers). It can also be retrieved by members of the db_owner fixed database role on the publication database, by members of the replmonitor fixed database role at the Distributor, and by users who are members of the publication access list (PAL).

The FilterClause property can be set by members of the sysadmin fixed server role at the Publisher. It can also be set by members of the db_owner fixed database role on the publication database.

Retrieving FilterClause is equivalent to executing sp_helpmergearticle (Transact-SQL).

Setting FilterClause is equivalent to executing sp_addmergearticle (Transact-SQL) or sp_changemergearticle (Transact-SQL).

			// Define the Publisher and publication names.
			string publisherName = publisherInstance;
			string publicationName = "AdvWorksSalesOrdersMerge";
			string publicationDbName = "AdventureWorks2012";

			// Specify article names.
			string articleName1 = "Employee";
			string articleName2 = "SalesOrderHeader";
			string articleName3 = "SalesOrderDetail";

			// Specify join filter information.
			string filterName12 = "SalesOrderHeader_Employee";
			string filterClause12 = "Employee.EmployeeID = " +
				"SalesOrderHeader.SalesPersonID";
			string filterName23 = "SalesOrderDetail_SalesOrderHeader";
			string filterClause23 = "SalesOrderHeader.SalesOrderID = " +
				"SalesOrderDetail.SalesOrderID";

			string salesSchema = "Sales";
			string hrSchema = "HumanResources";

			MergeArticle article1 = new MergeArticle();
			MergeArticle article2 = new MergeArticle();
			MergeArticle article3 = new MergeArticle();
			MergeJoinFilter filter12 = new MergeJoinFilter();
			MergeJoinFilter filter23 = new MergeJoinFilter();

			// Create a connection to the Publisher.
			ServerConnection conn = new ServerConnection(publisherName);

			// Create three merge articles that are horizontally partitioned
			// using a parameterized row filter on Employee.EmployeeID, which is 
			// extended to the two other articles using join filters. 
			try
			{
				// Connect to the Publisher.
				conn.Connect();

				// Create each article. 
				// For clarity, each article is defined separately. 
				// In practice, iterative structures and arrays should 
				// be used to efficiently create multiple articles.

				// Set the required properties for the Employee article.
				article1.ConnectionContext = conn;
				article1.Name = articleName1;
				article1.DatabaseName = publicationDbName;
				article1.SourceObjectName = articleName1;
				article1.SourceObjectOwner = hrSchema;
				article1.PublicationName = publicationName;
				article1.Type = ArticleOptions.TableBased;

				// Define the parameterized filter clause based on Hostname.
				article1.FilterClause = "Employee.LoginID = HOST_NAME()";

				// Set the required properties for the SalesOrderHeader article.
				article2.ConnectionContext = conn;
				article2.Name = articleName2;
				article2.DatabaseName = publicationDbName;
				article2.SourceObjectName = articleName2;
				article2.SourceObjectOwner = salesSchema;
				article2.PublicationName = publicationName;
				article2.Type = ArticleOptions.TableBased;

				// Set the required properties for the SalesOrderDetail article.
				article3.ConnectionContext = conn;
				article3.Name = articleName3;
				article3.DatabaseName = publicationDbName;
				article3.SourceObjectName = articleName3;
				article3.SourceObjectOwner = salesSchema;
				article3.PublicationName = publicationName;
				article3.Type = ArticleOptions.TableBased;

				if (!article1.IsExistingObject) article1.Create();
				if (!article2.IsExistingObject) article2.Create();
				if (!article3.IsExistingObject) article3.Create();

				// Select published columns for SalesOrderHeader.
				// Create an array of column names to vertically filter out.
				// In this example, only one column is removed.
				String[] columns = new String[1];

				columns[0] = "CreditCardApprovalCode";

				// Remove the column.
				article2.RemoveReplicatedColumns(columns);

				// Define a merge filter clauses that filter 
				// SalesOrderHeader based on Employee and 
				// SalesOrderDetail based on SalesOrderHeader. 

				// Parent article.
				filter12.JoinArticleName = articleName1;
				// Child article.
				filter12.ArticleName = articleName2;
				filter12.FilterName = filterName12;
				filter12.JoinUniqueKey = true;
				filter12.FilterTypes = FilterTypes.JoinFilter;
				filter12.JoinFilterClause = filterClause12;

				// Add the join filter to the child article.
				article2.AddMergeJoinFilter(filter12);

				// Parent article.
				filter23.JoinArticleName = articleName2;
				// Child article.
				filter23.ArticleName = articleName3;
				filter23.FilterName = filterName23;
				filter23.JoinUniqueKey = true;
				filter23.FilterTypes = FilterTypes.JoinFilter;
				filter23.JoinFilterClause = filterClause23;

				// Add the join filter to the child article.
				article3.AddMergeJoinFilter(filter23);
			}
			catch (Exception ex)
			{
				// Do error handling here and rollback the transaction.
				throw new ApplicationException(
					"The filtered articles could not be created", ex);
			}
			finally
			{
				conn.Disconnect();
			}
' Define the Publisher and publication names.
Dim publisherName As String = publisherInstance
Dim publicationName As String = "AdvWorksSalesOrdersMerge"
Dim publicationDbName As String = "AdventureWorks2012"

' Specify article names.
Dim articleName1 As String = "Employee"
Dim articleName2 As String = "SalesOrderHeader"
Dim articleName3 As String = "SalesOrderDetail"

' Specify join filter information.
Dim filterName12 As String = "SalesOrderHeader_Employee"
Dim filterClause12 As String = "Employee.EmployeeID = " + _
    "SalesOrderHeader.SalesPersonID"
Dim filterName23 As String = "SalesOrderDetail_SalesOrderHeader"
Dim filterClause23 As String = "SalesOrderHeader.SalesOrderID = " + _
    "SalesOrderDetail.SalesOrderID"

Dim salesSchema As String = "Sales"
Dim hrSchema As String = "HumanResources"

Dim article1 As MergeArticle = New MergeArticle()
Dim article2 As MergeArticle = New MergeArticle()
Dim article3 As MergeArticle = New MergeArticle()
Dim filter12 As MergeJoinFilter = New MergeJoinFilter()
Dim filter23 As MergeJoinFilter = New MergeJoinFilter()

' Create a connection to the Publisher.
Dim conn As ServerConnection = New ServerConnection(publisherName)

' Create three merge articles that are horizontally partitioned
' using a parameterized row filter on Employee.EmployeeID, which is 
' extended to the two other articles using join filters. 
Try
    ' Connect to the Publisher.
    conn.Connect()

    ' Create each article. 
    ' For clarity, each article is defined separately. 
    ' In practice, iterative structures and arrays should 
    ' be used to efficiently create multiple articles.

    ' Set the required properties for the Employee article.
    article1.ConnectionContext = conn
    article1.Name = articleName1
    article1.DatabaseName = publicationDbName
    article1.SourceObjectName = articleName1
    article1.SourceObjectOwner = hrSchema
    article1.PublicationName = publicationName
    article1.Type = ArticleOptions.TableBased

    ' Define the parameterized filter clause based on Hostname.
    article1.FilterClause = "Employee.LoginID = HOST_NAME()"

    ' Set the required properties for the SalesOrderHeader article.
    article2.ConnectionContext = conn
    article2.Name = articleName2
    article2.DatabaseName = publicationDbName
    article2.SourceObjectName = articleName2
    article2.SourceObjectOwner = salesSchema
    article2.PublicationName = publicationName
    article2.Type = ArticleOptions.TableBased

    ' Set the required properties for the SalesOrderDetail article.
    article3.ConnectionContext = conn
    article3.Name = articleName3
    article3.DatabaseName = publicationDbName
    article3.SourceObjectName = articleName3
    article3.SourceObjectOwner = salesSchema
    article3.PublicationName = publicationName
    article3.Type = ArticleOptions.TableBased

    ' Create the articles, if they do not already exist.
    If article1.IsExistingObject = False Then
        article1.Create()
    End If
    If article2.IsExistingObject = False Then
        article2.Create()
    End If
    If article3.IsExistingObject = False Then
        article3.Create()
    End If

    ' Select published columns for SalesOrderHeader.
    ' Create an array of column names to vertically filter out.
    ' In this example, only one column is removed.
    Dim columns() As String = New String(0) {}

    columns(0) = "CreditCardApprovalCode"

    ' Remove the column.
    article2.RemoveReplicatedColumns(columns)

    ' Define a merge filter clauses that filter 
    ' SalesOrderHeader based on Employee and 
    ' SalesOrderDetail based on SalesOrderHeader. 

    ' Parent article.
    filter12.JoinArticleName = articleName1
    ' Child article.
    filter12.ArticleName = articleName2
    filter12.FilterName = filterName12
    filter12.JoinUniqueKey = True
    filter12.FilterTypes = FilterTypes.JoinFilter
    filter12.JoinFilterClause = filterClause12

    ' Add the join filter to the child article.
    article2.AddMergeJoinFilter(filter12)

    ' Parent article.
    filter23.JoinArticleName = articleName2
    ' Child article.
    filter23.ArticleName = articleName3
    filter23.FilterName = filterName23
    filter23.JoinUniqueKey = True
    filter23.FilterTypes = FilterTypes.JoinFilter
    filter23.JoinFilterClause = filterClause23

    ' Add the join filter to the child article.
    article3.AddMergeJoinFilter(filter23)

Catch ex As Exception
    ' Do error handling here and rollback the transaction.
    Throw New ApplicationException( _
        "The filtered articles could not be created", ex)
Finally
    conn.Disconnect()
End Try
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