《SQL Server 2008 R2》 收缩数据库日志文件

USE [master]

GO
/****** Object:  StoredProcedure [dbo].[pro_Shrink_Log]    Script Date: 2019/8/16 16:56:21 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
-- =============================================
-- Author:        xlc
-- Create date: 2019.08.16
-- Description:    收缩数据库日志
-- =============================================
ALTER PROCEDURE [dbo].[pro_Shrink_Log]
    @dbName NVARCHAR(200)
AS
BEGIN
SET NOCOUNT ON;
 
    
    DECLARE @sql NVARCHAR(200);
    DECLARE @logname NVARCHAR(200);
    DECLARE @dbRecovery TINYINT;
    -- 获取日志文件名
    -- N 将内容转为unicode 中文也不会出现乱码 
    
    -- 获取日志文件名
    SET @sql= N'USE [' + @dbName +'];' + Char(13) + Char(10) +
    'SELECT TOP 1 @logname = NAME FROM SYS.DATABASE_FILES WHERE TYPE = 1';

    EXECUTE sp_executesql @sql, N'@logname NVARCHAR(200) output',@logname output;

    IF @logname IS NULL
    BEGIN
        PRINT '未找到日志文件：' + @sql;
        RETURN;
    END

    -- 获取当前恢复模式

    SET @sql = N'USE [' + @dbName + N'];' + Char(13) + Char(10) +
    'SELECT TOP 1 @dbRecovery = recovery_model FROM sys.databases where name =''' + @dbName + '''';
    
    EXECUTE sp_executesql @sql, N'@dbRecovery TINYINT output',@dbRecovery output;

    -- 1、设置模式为简单模式
    SET @sql = N'USE MASTER;'+Char(13) + Char(10) +'ALTER DATABASE [' + @dbName + N'] SET RECOVERY SIMPLE WITH NO_WAIT';
    EXECUTE sp_executesql @sql;
    SET @sql = N'ALTER DATABASE [' + @dbName + N'] SET RECOVERY SIMPLE';
    EXECUTE sp_executesql @sql;
 
    -- 2、收缩文件
    SET @sql = N'USE [' + @dbName + N'];' + Char(13) + Char(10) +
        'DBCC SHRINKFILE (N''' + @logname + ''', 1, TRUNCATEONLY)';
    EXECUTE sp_executesql @sql;

     -- 3、设置模式为完全
    IF @dbRecovery = 1 
    begin
        SET @sql = N'USE MASTER;'+Char(13) + Char(10) +'ALTER DATABASE [' + @dbName + N'] SET RECOVERY FULL WITH NO_WAIT';
        EXECUTE sp_executesql @sql;
        SET @sql = N'ALTER DATABASE [' + @dbName + N'] SET RECOVERY FULL';
        EXECUTE sp_executesql @sql;
    end
    PRINT '数据库：' + @dbName + ' 日志文件：' + @logname + ' 收缩完成';
END

EXEC pro_Shrink_Log test