创建、更改和删除索引

在 SQL Server 管理对象 (SMO) 层次结构中，索引由 Index 对象表示。 索引列由 IndexedColumn 对象的集合表示，而该对象由 IndexedColumns 属性表示。

可以通过指定 Index 对象的 IsXmlIndex 属性对 XML 列创建索引。

示例

若要使用所提供的任何代码示例，您必须选择创建应用程序所需的编程环境、编程模板和编程语言。 有关详细信息，请参阅在 Visual Studio .NET 中创建 Visual Basic SMO 项目或在 Visual Studio .NET 中创建 Visual C# SMO 项目。

在 Visual Basic 中创建非聚集组合索引

此代码示例演示如何创建组合非聚集索引。 对于复合索引，请将超过多个列添加到索引中。 对于非聚集索引，请将 IsClustered 属性设为 False。

' /r:Microsoft.SqlServer.Smo.dll
' /r:Microsoft.SqlServer.ConnectionInfo.dll
' /r:Microsoft.SqlServer.SqlEnum.dll
' /r:Microsoft.SqlServer.Management.Sdk.Sfc.dll

Imports Microsoft.SqlServer.Management.Smo
Public Class A
    Public Shared Sub Main()
        ' Connect to the local, default instance of SQL Server. 
        Dim srv As Server
        srv = New Server()

        ' Reference the AdventureWorks2012 database. 
        Dim db As Database
        db = srv.Databases("AdventureWorks2012")

        ' Declare a Table object and reference the HumanResources table. 
        Dim tb As Table
        tb = db.Tables("Employee", "HumanResources")

        ' Define an Index object variable by providing the parent table and index name in the constructor. 
        Dim idx As Index
        idx = New Index(tb, "TestIndex")

        ' Add indexed columns to the index. 
        Dim icol1 As IndexedColumn
        icol1 = New IndexedColumn(idx, "BusinessEntityID", True)
        idx.IndexedColumns.Add(icol1)
        Dim icol2 As IndexedColumn
        icol2 = New IndexedColumn(idx, "HireDate", True)
        idx.IndexedColumns.Add(icol2)

        ' Set the index properties. 
        idx.IndexKeyType = IndexKeyType.DriUniqueKey
        idx.IsClustered = False
        idx.FillFactor = 50

        ' Create the index on the instance of SQL Server. 
        idx.Create()

        ' Modify the page locks property. 
        idx.DisallowPageLocks = True

        ' Run the Alter method to make the change on the instance of SQL Server. 
        idx.Alter()

        ' Remove the index from the table. 
        idx.Drop()
    End Sub
End Class

在 Visual C# 中创建非聚集组合索引

此代码示例演示如何创建组合非聚集索引。 对于复合索引，请将超过多个列添加到索引中。 对于非聚集索引，请将 IsClustered 属性设为 False。

// /r:Microsoft.SqlServer.Smo.dll
// /r:Microsoft.SqlServer.ConnectionInfo.dll
// /r:Microsoft.SqlServer.SqlEnum.dll
// /r:Microsoft.SqlServer.Management.Sdk.Sfc.dll

using Microsoft.SqlServer.Management.Smo;

public class A {
   public static void Main() {
      // Connect to the local, default instance of SQL Server. 
      Server srv;
      srv = new Server();

      // Reference the AdventureWorks2012 database. 
      Database db;
      db = srv.Databases["AdventureWorks2012"];

      // Declare a Table object and reference the HumanResources table. 
      Table tb;
      tb = db.Tables["Employee", "HumanResources"];

      // Define an Index object variable by providing the parent table and index name in the constructor. 
      Index idx;
      idx = new Index(tb, "TestIndex");

      // Add indexed columns to the index. 
      IndexedColumn icol1;
      icol1 = new IndexedColumn(idx, "BusinessEntityID", true);
      idx.IndexedColumns.Add(icol1);
      IndexedColumn icol2;
      icol2 = new IndexedColumn(idx, "HireDate", true);
      idx.IndexedColumns.Add(icol2);

      // Set the index properties. 
      idx.IndexKeyType = IndexKeyType.DriUniqueKey;
      idx.IsClustered = false;
      idx.FillFactor = 50;

      // Create the index on the instance of SQL Server. 
      idx.Create();

      // Modify the page locks property. 
      idx.DisallowPageLocks = true;

      // Run the Alter method to make the change on the instance of SQL Server. 
      idx.Alter();

      // Remove the index from the table. 
      idx.Drop();
   }
}

在 PowerShell 中创建非聚集组合索引

此代码示例演示如何创建组合非聚集索引。 对于复合索引，请将超过多个列添加到索引中。 对于非聚集索引，请将 IsClustered 属性设为 False。

# Set the path context to the local, default instance of SQL Server and to the
#database tables in Adventureworks2012
CD \sql\localhost\default\databases\AdventureWorks2012\Tables\

#Get a reference to the table
$tb = get-item HumanResources.Employee

#Define an Index object variable by providing the parent table and index name in the constructor. 
$idx = New-Object -TypeName Microsoft.SqlServer.Management.SMO.Index -argumentlist $tb, "TestIndex"

#Add indexed columns to the index. 
$icol1 = New-Object -TypeName Microsoft.SqlServer.Management.SMO.IndexedColumn `
-argumentlist $idx, "BusinessEntityId", $true
$idx.IndexedColumns.Add($icol1)

$icol2 = New-Object -TypeName Microsoft.SqlServer.Management.SMO.IndexedColumn `
-argumentlist $idx, "HireDate", $true
$idx.IndexedColumns.Add($icol2)

#Set the index properties. 
$idx.IndexKeyType = [Microsoft.SqlServer.Management.SMO.IndexKeyType]::DriUniqueKey 
$idx.IsClustered = $false
$idx.FillFactor = 50

#Create the index on the instance of SQL Server. 
$idx.Create()

#Modify the page locks property. 
$idx.DisallowPageLocks = $true

#Run the Alter method to make the change on the instance of SQL Server. 
$idx.Alter()

#Remove the index from the table. 
$idx.Drop();

在 Visual Basic 中创建 XML 索引

此代码示例演示如何对 XML 数据类型创建 XML 索引。 XML 数据类型是一个在使用 XML 架构中创建的名为 MySampleCollection 的 XML 架构集合。 XML 索引具有一些限制，其中一个限制是 XML 索引必须是对已具有聚集主键的表创建的。

' /r:Microsoft.SqlServer.Smo.dll
' /r:Microsoft.SqlServer.ConnectionInfo.dll
' /r:Microsoft.SqlServer.SqlEnum.dll
' /r:Microsoft.SqlServer.Management.Sdk.Sfc.dll

Imports Microsoft.SqlServer.Management.Smo

Public Class A
    Public Shared Sub Main()
        ' Connect to the local, default instance of SQL Server. 
        Dim srv As Server
        srv = New Server()
        Dim db1 As Database = srv.Databases("TESTDB")
        ' Define a Table object variable and add an XML type column. 
        Dim tb As New Table(db1, "XmlTable3")

        Dim mySample As New XmlSchemaCollection(db1, "Sample4", "dbo")
        mySample.Text = "<xsd:schema xmlns:xsd=""http://www.w3.org/2001/XMLSchema"" targetNamespace=""NS2""> <xsd:element name=""elem1"" type=""xsd:integer""/></xsd:schema>"
        mySample.Create()

        Dim col11 As Column

        ' This sample requires that an XML schema type called MySampleCollection exists on the database. 
        col11 = New Column(tb, "XMLValue", DataType.Xml("Sample4"))

        ' Add another integer column that can be made into a unique, primary key. 
        tb.Columns.Add(col11)
        Dim col21 As Column
        col21 = New Column(tb, "Number", DataType.Int)
        col21.Nullable = False
        tb.Columns.Add(col21)

        ' Create the table of the instance of SQL Server. 
        tb.Create()

        ' Create a unique, clustered, primary key index on the integer column. This is required for an XML index. 
        Dim cp As Index
        cp = New Index(tb, "clusprimindex3")
        cp.IsClustered = True
        cp.IndexKeyType = IndexKeyType.DriPrimaryKey
        Dim cpcol As IndexedColumn
        cpcol = New IndexedColumn(cp, "Number", True)
        cp.IndexedColumns.Add(cpcol)
        cp.Create()

        ' Define and XML Index object variable by supplying the parent table and the XML index name arguments in the constructor. 
        Dim i As Index
        i = New Index(tb, "xmlindex")
        Dim ic As IndexedColumn
        ic = New IndexedColumn(i, "XMLValue", True)
        i.IndexedColumns.Add(ic)

        ' Create the XML index on the instance of SQL Server. 
        i.Create()
    End Sub
End Class

在 Visual C# 中创建 XML 索引

此代码示例演示如何对 XML 数据类型创建 XML 索引。 XML 数据类型是一个在使用 XML 架构中创建的名为 MySampleCollection 的 XML 架构集合。 XML 索引具有一些限制，其中一个限制是 XML 索引必须是对已具有聚集主键的表创建的。

// /r:Microsoft.SqlServer.Smo.dll
// /r:Microsoft.SqlServer.ConnectionInfo.dll
// /r:Microsoft.SqlServer.SqlEnum.dll
// /r:Microsoft.SqlServer.Management.Sdk.Sfc.dll

using Microsoft.SqlServer.Management.Smo;

public class A {
   public static void Main() {
      // Connect to the local, default instance of SQL Server. 
      Server srv;
      srv = new Server();
      Database db1 = srv.Databases["TESTDB"];
      // Define a Table object variable and add an XML type column. 
      Table tb = new Table(db1, "XmlTable3");

      XmlSchemaCollection mySample = new XmlSchemaCollection(db1, "Sample4", "dbo");
      mySample.Text = "<xsd:schema xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" targetNamespace=\"NS2\"> <xsd:element name=\"elem1\" type=\"xsd:integer\"/></xsd:schema>";
      mySample.Create();

      Column col11;

      // This sample requires that an XML schema type called MySampleCollection exists on the database. 
      col11 = new Column(tb, "XMLValue", DataType.Xml("Sample4"));

      // Add another integer column that can be made into a unique, primary key. 
      tb.Columns.Add(col11);
      Column col21;
      col21 = new Column(tb, "Number", DataType.Int);
      col21.Nullable = false;
      tb.Columns.Add(col21);

      // Create the table of the instance of SQL Server. 
      tb.Create();

      // Create a unique, clustered, primary key index on the integer column. This is required for an XML index. 
      Index cp;
      cp = new Index(tb, "clusprimindex3");
      cp.IsClustered = true;
      cp.IndexKeyType = IndexKeyType.DriPrimaryKey;
      IndexedColumn cpcol;
      cpcol = new IndexedColumn(cp, "Number", true);
      cp.IndexedColumns.Add(cpcol);
      cp.Create();

      // Define and XML Index object variable by supplying the parent table and the XML index name arguments in the constructor. 
      Index i;
      i = new Index(tb, "xmlindex");
      IndexedColumn ic;
      ic = new IndexedColumn(i, "XMLValue", true);
      i.IndexedColumns.Add(ic);

      // Create the XML index on the instance of SQL Server. 
      i.Create();
   }
}

在 PowerShell 中创建 XML 索引

此代码示例演示如何对 XML 数据类型创建 XML 索引。 XML 数据类型是一个在使用 XML 架构中创建的名为 MySampleCollection 的 XML 架构集合。 XML 索引具有一些限制，其中一个限制是 XML 索引必须是对已具有聚集主键的表创建的。

# Set the path context to the local, default instance of SQL Server and get a reference to adventureworks2012
CD \sql\localhost\default\databases
$db = get-item Adventureworks2012

#Define a Table object variable and add an XML type column. 
#This sample requires that an XML schema type called MySampleCollection exists on the database. 
#See sample on Creating an XML schema to do this
$tb = New-Object -TypeName Microsoft.SqlServer.Management.SMO.Table -argumentlist $db, "XmlTable"
$Type = [Microsoft.SqlServer.Management.SMO.DataType]::Xml("MySampleCollection")
$col1 =  New-Object -TypeName Microsoft.SqlServer.Management.SMO.Column -argumentlist $tb,"XMLValue", $Type
$tb.Columns.Add($col1)

#Add another integer column that can be made into a unique, primary key. 
$Type = [Microsoft.SqlServer.Management.SMO.DataType]::Int
$col2 =  New-Object -TypeName Microsoft.SqlServer.Management.SMO.Column -argumentlist $tb,"Number", $Type
$col2.Nullable = $false
$tb.Columns.Add($col2)
          
#Create the table of the instance of SQL Server. 
$tb.Create()

#Create a unique, clustered, primary key index on the integer column. This is required for an XML index. 
#Define an Index object variable by providing the parent table and index name in the constructor. 
$cp = New-Object -TypeName Microsoft.SqlServer.Management.SMO.Index -argumentlist $tb, "clusprimindex"        
$cp.IsClustered = $true;
$cp.IndexKeyType = [Microsoft.SqlServer.Management.SMO.IndexKeyType]::DriPrimaryKey;

#Create and add an indexed column to the index. 
$cpcol = New-Object -TypeName Microsoft.SqlServer.Management.SMO.IndexedColumn `
-argumentlist $cp, "Number", $true
$cp.IndexedColumns.Add($cpcol)
$cp.Create()

#Define and XML Index object variable by supplying the parent table and
# the XML index name arguments in the constructor. 
$i = New-Object -TypeName Microsoft.SqlServer.Management.SMO.Index -argumentlist $tb, "xmlindex" 

#Create and add an indexed column to the index. 
$ic = New-Object -TypeName Microsoft.SqlServer.Management.SMO.IndexedColumn `
-argumentlist $i, "XMLValue", $true  
$i.IndexedColumns.Add($ic)

#Create the XML index on the instance of SQL Server
$i.Create()

请参阅

参考

Index