如何获得当前数据库对象依赖关系_MySQL

<P>create function udf_GenLevelPath()   <BR>returns @v_Result table (LevelPath int,OName sysname)   <BR>/****************************************************************/   <BR>/* 功能描述：按照依赖关系，列出<U><STRONG><FONT color=#333333 size=3>数据库</FONT></STRONG></U><U><STRONG><FONT color=#333333 size=3>对象</FONT></STRONG></U> */   <BR>/* 输入参数：无 */   <BR>/* 输出参数：按照依赖关系排列的数据库对象表，无依赖在前 */   <BR>/* 编写： anna*/   <BR>/* 时间：2007-12-12 */   <BR>/****************************************************************/   <BR>as   <BR>begin   <BR>declare @vt_ObjDepPath table (LevelPath int,OName sysname null)   <BR>declare @vt_Temp1 table (OName sysname null)   <BR>declare @vt_Temp2 table (OName sysname null)   <BR>--依赖的级别，值越小依赖性越强   <BR>declare @vi_LevelPath int       <BR>set @vi_LevelPath = 1   <BR>--得到所有对象，不包括系统对象           <BR>insert into @vt_ObjDepPath(LevelPath,OName)   <BR>select @vi_LevelPath,o.name   <BR>from sysobjects o   <BR>where xtype not in ('S','X')   <BR><BR>--得到依赖对象的名称   <BR>insert into @vt_Temp1(OName)   <BR>select distinct object_name(sysdepends.depid)     <BR>from sysdepends,@vt_ObjDepPath p   <BR>where sysdepends.id <> sysdepends.depid   <BR>and p.OName = object_name(sysdepends.id)   <BR><BR>--循环处理：由对象而得到其依赖对象   <BR>while (select count(*) from @vt_Temp1) > 0   <BR>begin   <BR>set @vi_LevelPath = @vi_LevelPath + 1   <BR><BR>update @vt_ObjDepPath   <BR>set LevelPath = @vi_LevelPath   <BR>where OName in (select OName from @vt_Temp1)   <BR>and LevelPath = @vi_LevelPath - 1   <BR><BR>delete from @vt_Temp2   <BR><BR>insert into @vt_Temp2   <BR>select * from @vt_Temp1   <BR><BR>delete from @vt_Temp1   <BR><BR>insert into @vt_Temp1(OName)   <BR>select distinct object_name(sysdepends.depid)     <BR>from sysdepends,@vt_Temp2 t2   <BR>where t2.OName = object_name(sysdepends.id)   <BR>and sysdepends.id <> sysdepends.depid  <BR><BR>end       </P><P>select @vi_LevelPath = max(LevelPath) from @vt_ObjDepPath   <BR><BR>--修改没有依赖对象的对象级别为最大   <BR>update @vt_ObjDepPath   <BR>set LevelPath = @vi_LevelPath + 1   <BR>where OName not in (select distinct   <BR>object_name(sysdepends.id) from sysdepends)   <BR>and LevelPath = 1   <BR><BR>insert into @v_Result   <BR>select * from @vt_ObjDepPath order by LevelPath desc   <BR>return   <BR>end   <BR>go   <BR><BR>--调用方法   <BR>select * from dbo.udf_GenLevelPath()   <BR>go</P>