Sql server 跨服务器在一个存储过程sp_A中调用另一个存储过程sp_B

declare @b int
declare @sqlstr varchar(500)
set @b=1539
set @sqlstr='SELECT a.* FROM OPENROWSET'
       +'('
       +'''MSDASQL'''
       +','
       +'''DRIVER={SQL Server};SERVER=127.0.0.1;UID=sa;PWD='''
       +','
       +'''exec hrms.dbo.test '
       +cast(@b as varchar(4))
       +''') AS a '
print @sqlstr

exec (@sqlstr)

print @sqlstr的结果是。。。
SELECT a.* FROM OPENROWSET('MSDASQL','DRIVER={SQL Server};SERVER=127.0.0.1;UID=sa;PWD=','exec hrms.dbo.test 1539') AS a

运行结果正确