实现 Full-Text 搜索

2017-06-13

全文搜索按 SQL Server 实例提供，由对象在 SMO FullTextService 中表示。该 FullTextService 对象位于对象下 Server 。它用于管理Microsoft全文搜索服务的配置选项。该 FullTextCatalogCollection 对象属于该 Database 对象，它是表示为数据库定义的全文目录的对象集合 FullTextCatalog 。每个表只能定义一个全文索引，这与普通索引不同。这由 FullTextIndexColumn 对象中的 Table 对象表示。

若要创建全文搜索服务，必须在数据库上定义全文目录，并在数据库中的一个表上定义全文搜索索引。

首先，通过调用 FullTextCatalog 构造函数并指定目录名称，在数据库上创建全文目录。然后，通过调用构造函数并指定要在其中创建它的表来创建全文索引。然后，可以使用对象并在表中提供列的名称，为全文索引 FullTextIndexColumn 添加索引列。然后，将 CatalogName 属性设置为已创建的目录。最后，调用该方法 Create 并在 SQL Server 实例上创建全文索引。

示例：

若要使用提供的任何代码示例，必须选择要在其中创建应用程序的编程环境、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 Full-Text 搜索服务

此代码示例为 AdventureWorks2012 示例数据库中的 ProductCategory 表创建全文搜索目录。然后，它会在表中的“名称”列 ProductCategory 上创建全文搜索索引。全文搜索索引要求列上已定义唯一索引。

' compile with:   
' /r:Microsoft.SqlServer.SqlEnum.dll   
' /r:Microsoft.SqlServer.Smo.dll   
' /r:Microsoft.SqlServer.ConnectionInfo.dll   
' /r:Microsoft.SqlServer.Management.Sdk.Sfc.dll  
  
Imports Microsoft.SqlServer.Management.Smo  
Imports Microsoft.SqlServer.Management.Sdk.Sfc  
Imports Microsoft.SqlServer.Management.Common  
  
Public Class A  
   Public Shared Sub Main()  
      ' Connect to the local, default instance of SQL Server.  
      Dim srv As Server = Nothing  
      srv = New Server()  
  
      ' Reference the AdventureWorks database.  
      Dim db As Database = Nothing  
      db = srv.Databases("AdventureWorks")  
  
      ' Reference the ProductCategory table.  
      Dim tb As Table = Nothing  
      tb = db.Tables("ProductCategory", "Production")  
  
      ' Define a FullTextCatalog object variable by specifying the parent database and name arguments in the constructor.  
      Dim ftc As FullTextCatalog = Nothing  
      ftc = New FullTextCatalog(db, "Test_Catalog")  
      ftc.IsDefault = True  
  
      ' Create the Full-Text Search catalog on the instance of SQL Server.  
      ftc.Create()  
  
      ' Define a FullTextIndex object varaible by supplying the parent table argument in the constructor.  
      Dim fti As FullTextIndex = Nothing  
      fti = New FullTextIndex(tb)  
  
      ' Define a FullTextIndexColumn object variable by supplying the parent index and column name arguments in the constructor.  
      Dim ftic As FullTextIndexColumn = Nothing  
      ftic = New FullTextIndexColumn(fti, "Name")  
  
      ' Add the indexed column to the index.  
      fti.IndexedColumns.Add(ftic)  
      fti.ChangeTracking = ChangeTracking.Automatic  
  
      ' Specify the unique index on the table that is required by the Full Text Search index.  
      fti.UniqueIndexName = "AK_ProductCategory_Name"  
  
      ' Specify the catalog associated with the index.  
      fti.CatalogName = "Test_Catalog"  
  
      ' Create the Full Text Search index on the instance of SQL Server.  
      fti.Create()  
   End Sub  
End Class

在 Visual C 中创建 Full-Text 搜索服务#

// compile with:   
// /r:Microsoft.SqlServer.SqlEnum.dll   
// /r:Microsoft.SqlServer.Smo.dll   
// /r:Microsoft.SqlServer.ConnectionInfo.dll   
// /r:Microsoft.SqlServer.Management.Sdk.Sfc.dll   
  
using Microsoft.SqlServer.Management.Smo;  
using Microsoft.SqlServer.Management.Sdk.Sfc;  
using Microsoft.SqlServer.Management.Common;  
  
public class A {  
   public static void Main() {  
      // Connect to the local, default instance of SQL Server.  
      Server srv = default(Server);  
      srv = new Server();  
  
      // Reference the AdventureWorks database.  
      Database db = default(Database);  
      db = srv.Databases ["AdventureWorks"];  
  
      // Reference the ProductCategory table.  
      Table tb = default(Table);  
      tb = db.Tables["ProductCategory", "Production"];  
  
      // Define a FullTextCatalog object variable by specifying the parent database and name arguments in the constructor.  
      FullTextCatalog ftc = default(FullTextCatalog);  
      ftc = new FullTextCatalog(db, "Test_Catalog");  
      ftc.IsDefault = true;  
  
      // Create the Full-Text Search catalog on the instance of SQL Server.  
      ftc.Create();  
  
      // Define a FullTextIndex object varaible by supplying the parent table argument in the constructor.  
      FullTextIndex fti = default(FullTextIndex);  
      fti = new FullTextIndex(tb);  
  
      // Define a FullTextIndexColumn object variable by supplying the parent index and column name arguments in the constructor.  
      FullTextIndexColumn ftic = default(FullTextIndexColumn);  
      ftic = new FullTextIndexColumn(fti, "Name");  
  
      // Add the indexed column to the index.  
      fti.IndexedColumns.Add(ftic);  
      fti.ChangeTracking = ChangeTracking.Automatic;  
  
      // Specify the unique index on the table that is required by the Full Text Search index.  
      fti.UniqueIndexName = "AK_ProductCategory_Name";  
  
      // Specify the catalog associated with the index.  
      fti.CatalogName = "Test_Catalog";  
  
      // Create the Full Text Search index on the instance of SQL Server.  
      fti.Create();  
   }  
}

在 PowerShell 中创建 Full-Text 搜索服务

# Example of implementing a full text search on the default instance.  
# Set the path context to the local, default instance of SQL Server and database tables  
  
CD \sql\localhost\default\databases  
$db = Get-Item AdventureWorks2012  
  
CD AdventureWorks\tables  
  
#Get a reference to the table  
$tb = Get-Item Production.ProductCategory  
  
# Define a FullTextCatalog object variable by specifying the parent database and name arguments in the constructor.  
  
$ftc = New-Object -TypeName Microsoft.SqlServer.Management.SMO.FullTextCatalog -ArgumentList $db, "Test_Catalog2"  
$ftc.IsDefault = $true  
  
# Create the Full Text Search catalog on the instance of SQL Server.  
$ftc.Create()  
  
# Define a FullTextIndex object variable by supplying the parent table argument in the constructor.  
$fti = New-Object -TypeName Microsoft.SqlServer.Management.SMO.FullTextIndex -ArgumentList $tb  
  
#  Define a FullTextIndexColumn object variable by supplying the parent index
#  and column name arguments in the constructor.  
  
$ftic = New-Object -TypeName Microsoft.SqlServer.Management.SMO.FullTextIndexColumn -ArgumentList $fti, "Name"  
  
# Add the indexed column to the index.  
$fti.IndexedColumns.Add($ftic)  
  
# Set change tracking  
$fti.ChangeTracking = [Microsoft.SqlServer.Management.SMO.ChangeTracking]::Automatic  
  
# Specify the unique index on the table that is required by the Full Text Search index.  
$fti.UniqueIndexName = "AK_ProductCategory_Name"  
  
# Specify the catalog associated with the index.  
$fti.CatalogName = "Test_Catalog2"  
  
# Create the Full Text Search Index  
$fti.Create()

通过

实现 Full-Text 搜索

示例：

在 Visual Basic 中创建 Full-Text 搜索服务

在 Visual C 中创建 Full-Text 搜索服务#

在 PowerShell 中创建 Full-Text 搜索服务

其他资源