SQL SERVER 生成MYSQL建表脚本

/****** Object:  StoredProcedure [dbo].[GET_TableScript_MYSQL]    Script Date: 06/15/2012 13:05:14 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
/*==============================================================
名称: GET_TableScript_MYSQL
功能: 生成单个表的MYSQL脚本
创建：2010年10月22日
参数：@DBNAME   --数据库名称
      @TBNAME   --表名
      @SQL      --输出脚本
==============================================================*/
ALTER PROCEDURE [dbo].[GET_TableScript_MYSQL] (@DBNAME varchar(40),@TBNAME VARCHAR(100),@SQL VARCHAR(max) OUTPUT) AS         

declare @table_script nvarchar(max) --建表的脚本
declare @index_script nvarchar(max) --索引的脚本
declare @default_script nvarchar(max) --默认值的脚本
declare @check_script nvarchar(max) --check约束的脚本
declare @sql_cmd nvarchar(max)  --动态SQL命令
declare @err_info varchar(200)
set @tbname = UPPER(@tbname);
if OBJECT_ID(@DBNAME+'.dbo.'+@TBNAME) is null
BEGIN
    set @err_info='对象:'+@DBNAME+'.dbo.'+@TBNAME+'不存在!'
    raiserror(@err_info,16,1)
    return
END
----------------------生成创建表脚本----------------------------
--1.添加算定义字段
set @table_script = 'CREATE TABLE '+@TBNAME+'
('+char(13)+char(10);

--添加表中的其它字段
set @sql_cmd=N'
use '+@DBNAME+'
set @table_script=''''
select @table_script=@table_script+
        +t.NAME+'' ''
        +(case when t.name=''GENIUS_UID'' then ''BIGINT''
               when t.xusertype in (175,62,239,59,122,165,173) then c.mysql+'' (''+convert(varchar(30),isnull(t.prec,''''))+'')''
               when t.xusertype in (231) and t.length=-1 then ''BLOB''
               when t.xusertype in (231) and t.length<>-1 then c.mysql+'' (''+convert(varchar(30),isnull(t.prec,''''))+'')''
               when t.xusertype in (167) and t.length=-1 then ''BLOB''
               when t.xusertype in (167) and t.length<>-1 then c.mysql+'' (''+convert(varchar(30),isnull(t.prec,''''))+'')''
               when t.xusertype in (106,108) then c.mysql+'' (''+convert(varchar(30),isnull(t.prec,''''))+'',''+convert(varchar(30),isnull(t.scale,''''))+'')''
               else c.mysql
         END)
         +(case when t.isnullable=1 then '' null'' else '' not null ''end)
         +(case when COLUMNPROPERTY(t.ID, t.NAME, ''ISIDENTITY'')=1 then '' identity'' else '''' end)
         +'',''+char(13)+char(10)
from syscolumns t join systypes p  on t.xusertype = p.xusertype
    inner join pubdb..DB_TYPES c on p.xtype=c.user_type_id
where t.ID=OBJECT_ID('''+@TBNAME+''')
ORDER BY  t.COLID;
'
EXEc sp_executesql @sql_cmd,N'@table_script varchar(max) output',@sql_cmd output
set @table_script=@table_script+@sql_cmd
IF len(@table_script)>0
    set @table_script=substring(@table_script,1,len(@table_script)-3)+char(13)+char(10)
        +');'+char(13)+char(10)
        +char(13)+char(10)+char(13)+char(10)

--------------------生成索引脚本---------------------------------------
set @index_script=''
set @sql_cmd=N'
use '+@DBNAME+'
declare @ct int
declare @indid int      --当前索引ID
declare @p_indid int    --前一个索引ID
select @indid=-1, @p_indid=0,@ct=0    --初始化，以后用@indid和@p_indid判断是否索引ID发生变化
set @index_script=''''
select @indid=INDID
    ,@index_script=@index_script
    +(case when @indid<>@p_indid and @ct>0 then '');''+char(13)+char(10)+char(13)+char(10) else '''' end)
    +(case when @indid<>@p_indid and UNIQ=''PRIMARY KEY''
          then ''ALTER TABLE ''+TABNAME+'' ADD CONSTRAINT ''+name+'' PRIMARY KEY ''+char(13)+char(10)
                +''(''+char(13)+char(10)
                +''    ''+COLNAME+char(13)+char(10)
          when @indid<>@p_indid and UNIQ=''UNIQUE''
          then ''ALTER TABLE ''+TABNAME+'' ADD CONSTRAINT ''+name+'' UNIQUE ''+char(13)+char(10)
                +''(''+char(13)+char(10)
                +''    ''+COLNAME+char(13)+char(10)
          when @indid<>@p_indid and UNIQ=''INDEX''
          then ''CREATE INDEX ''+name+'' ON ''+TABNAME+char(13)+char(10)
                +''(''+char(13)+char(10)
                +''    ''+COLNAME+char(13)+char(10)
          when @indid=@p_indid
          then  ''    ,''+COLNAME+char(13)+char(10)
     END)
    ,@ct=@ct+1
    ,@p_indid=@indid
from
(
    SELECT A.INDID,B.KEYNO
        ,NAME,(SELECT NAME FROM SYSOBJECTS WHERE ID=A.ID) AS TABNAME,
        (SELECT NAME FROM SYSCOLUMNS WHERE ID=B.ID AND COLID=B.COLID) AS COLNAME,
        (CASE WHEN EXISTS(SELECT 1 FROM SYSOBJECTS WHERE NAME=A.NAME AND XTYPE=''UQ'') THEN ''UNIQUE''
              WHEN EXISTS(SELECT 1 FROM SYSOBJECTS WHERE NAME=A.NAME AND XTYPE=''PK'') THEN ''PRIMARY KEY''
              ELSE ''INDEX'' END)  AS UNIQ,
        (CASE WHEN A.INDID=1 THEN ''CLUSTERED'' WHEN A.INDID>1 THEN ''NONCLUSTERED'' END) AS CLUSTER
    FROM SYSINDEXES A INNER JOIN SYSINDEXKEYS B ON A.INDID=B.INDID AND A.ID=B.ID
    WHERE A.ID=OBJECT_ID('''+@TBNAME+''') and a.indid<>0
) t
ORDER BY INDID,KEYNO'
EXEc sp_executesql @sql_cmd,N'@index_script varchar(max) output',@sql_cmd output
set @index_script=@sql_cmd
IF len(@index_script)>0
    set @index_script=@index_script+');'+char(13)+char(10)+char(13)+char(10)
--生成默认值约束
set @sql_cmd='
use '+@DBNAME+'
set @default_script=''''
SELECT @default_script=@default_script
        +''ALTER TABLE ''+OBJECT_NAME(O.PARENT_OBJ)
        +'' ALTER COLUMN ''+C.NAME+'' SET default ''+replace(replace(t.text,''('',''''),'')'','''')+'';''+char(13)+char(10)
        +char(13)+char(10)
FROM SYSOBJECTS O INNER JOIN SYSCOMMENTS T ON O.ID=T.ID
    INNER JOIN SYSCOLUMNS C ON O.PARENT_OBJ=C.ID AND C.CDEFAULT=T.ID
WHERE O.XTYPE=''D'' AND O.PARENT_OBJ=OBJECT_ID('''+@TBNAME+''') AND T.text<>''(getdate())'''    --mysql不支持函数做默认值
EXEc sp_executesql @sql_cmd,N'@default_script varchar(max) output',@sql_cmd output
set @default_script=@sql_cmd+char(13)+char(10)

set @SQL=@table_script+@index_script+@default_script
declare @len int,@n int
set @len=LEN(@SQL)
set @n=0
while(@len>0)
BEGIN
  PRINT(substring(@SQL,@n*4000+1,4000));
  set @n=@n+1
  set @len=@len-4000;
END