SQL server 表结构转Oracle SQL脚本

SQL server 表结构转Oracle SQL脚本

/****** Object: StoredProcedure [dbo].[getOracle] Script Date: 2019/7/25 16:32:15 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[getOracle]
(@opTableName nvarchar(100))
as
begin
/********************
* function:sqlserver 表结构转换成Oralce 表结构，不支持索引以及自动增长
**********************/
--取消影响行数
set nocount on;

--创建表名游标
declare table_cursor cursor for
select CONVERT(varchar(300),x.name) name,CONVERT(varchar(500),y.value) value
from sys.tables x
left join (select major_id,value from sys.extended_properties where minor_id=0) y
on x.object_id=y.major_id
where x.name=@opTableName
order by x.name;

--声明变量
declare
@sql varchar(max)='',
@primary varchar(300),
@tableName varchar(300), --表名称
@tabledes varchar(500); --表名称描述

--创建表结构临时表
create table #table(colname varchar(300),
isprimary int,
typename varchar(50),
intlength int,
decimallength int,
nullflag int,
defaultval varchar(50),
commonts varchar(500)
)

--打开游标
open table_cursor;
fetch next from table_cursor into @tableName,@tabledes;
select @tabledes = case when ISNULL(@tabledes,'')='' then '' else @tabledes end
while @@FETCH_STATUS = 0
begin
truncate table #table;
insert into #table (colname,isprimary,typename,intlength,decimallength,nullflag,defaultval,commonts)
SELECT CONVERT(varchar(300),a.name) [字段名],
(case when (SELECT count(*)
FROM sysobjects
WHERE (name in (SELECT name
FROM sysindexes
WHERE (id = a.id)
AND (indid in (SELECT indid
FROM sysindexkeys
WHERE (id = a.id)
AND (colid in (SELECT colid
FROM syscolumns
WHERE (id = a.id)
AND (name = a.name)))))))
AND (xtype = 'PK')) > 0 then 1
end) [主键],
b.name [类型],
COLUMNPROPERTY(a.id, a.name, 'PRECISION') as [长度],
isnull(COLUMNPROPERTY(a.id, a.name, 'Scale'), 0) as [小数位数],
(case when a.isnullable = 1 then 1 else 0 end) [允许空],
e.text [默认值],
CONVERT(varchar(500),g.[value]) AS [说明]
FROM syscolumns a
left join systypes b
on a.xtype = b.xusertype
inner join sysobjects d
on a.id = d.id
and d.xtype = 'U'
and d.name <> 'dtproperties'
left join syscomments e
on a.cdefault = e.id
left join sys.extended_properties g
on a.id = g.major_id
AND a.colid = g.minor_id
left join sys.extended_properties f
on d.id = f.class
and f.minor_id = 0
where b.name is not null
and d.name=@tableName
order by a.id,a.colorder

--初始化变量
set @sql='';

--构建表结构
select @sql+='
'+case colname when 'Comment' then 'Comments' else colname end +' '
+case typename
when 'varchar' then 'varchar2('+CONVERT(varchar(10),intlength)+') '
when 'nvarchar' then 'nvarchar2('+CONVERT(varchar(10),intlength)+') '
when 'int' then 'number(4) '
when 'decimal' then 'number('+CONVERT(varchar(10),intlength)+ ( case when decimallength>0 then ','+ CONVERT(varchar(10),decimallength) else '' end)+') '
when 'datetime' then 'date '
WHEN 'numeric' then 'number('+CONVERT(varchar(10),intlength)+ ( case when decimallength>0 then ','+ CONVERT(varchar(10),decimallength) else '' end)+') '
else typename
end
+ case when defaultval is not null and len(defaultval)>0 then 'default '+
(case when charindex('getdate',defaultval)>0 then 'sysdate '
when charindex('newid',defaultval)>0 then 'sys_guid() '
else (case when typename='int' or typename='decimal' then REPLACE(REPLACE(defaultval,'(',''),')','') else defaultval end )
end)
else '' end
+ case when nullflag=0 then ' not null,' else ',' end
from #table;

select * from #table

if @sql is not null and len(@sql)>0
begin
set @sql=left(@sql,len(@sql)-1);

--创建表结构
set @sql='create table '+ @tableName+'('+@sql+
'
);
comment on table '+@tableName+' is '''+@tabledes+''';
'
--添加备注
select @sql+= case when commonts is not null and len(commonts)>0 then 'comment on column '+@tableName+'.'+colname+' is '''+commonts+''';
' else '' end
from #table;

--添加主键索引
if exists(select 1 from #table where isprimary=1 )
begin
set @primary=''
select @primary+= colname+','
from #table
where isprimary=1
set @primary=left(@primary,len(@primary)-1);
set @sql+='alter table '+@tableName+' add constraint PK_'+@tableName+' primary key ('+@primary+');'
end

end
print @sql;
fetch next from table_cursor into @tableName,@tabledes;
end
close table_cursor;
deallocate table_cursor;

drop table #table;
end