Returns a SQL-DDL create index statement for an index corresponding to a Linq-to-SQL MetaAssociation.

Namespace:  Huagati.DBMLTools.Runtime
Assembly:  HuagatiDBMLToolsRTE (in HuagatiDBMLToolsRTE.dll) Version: 1.66.3362.23798

Syntax

C#
public static string AddIndexStatement(
	this MetaAssociation association
)
Visual Basic (Declaration)
<ExtensionAttribute> _
Public Shared Function AddIndexStatement ( _
	association As MetaAssociation _
) As String
Visual C++
[ExtensionAttribute]
public:
static String^ AddIndexStatement(
	MetaAssociation^ association
)

Parameters

association
Type: System.Data.Linq.Mapping..::.MetaAssociation
Association to create an index for.

Return Value

SQL-DDL 'create index' statement for creating an index complementing a foreign key/association.

Examples

This example shows how to check whether a foreign key corresponding to an association exists in the database, and generate SQL-DDL for adding missing constraints.
CopyC#
using Huagati.DBMLTools.Runtime;

public class MappingSample
{
    public void Test()
    {
        SomeDataContext dc = new SomeDataContext();

        //iterate through the collection of tables defined in the datacontext
        foreach (System.Data.Linq.Mapping.MetaTable table in dc.Mapping.GetTables())
        {
            //iterate through the collection of associations
            foreach (System.Data.Linq.Mapping.MetaAssociation association in table.RowType.Associations)
            {
                if (association.IsForeignKey && !association.IsIndexed(dc.Connection))
                {
                    //generate 'create index' statement
                    string createIndex = association.AddIndexStatement();
                }
            }
        }
    }
}

See Also