Sybase分页存储过程实现

项目中需要用到Sybase数据库的分页功能，想尽各种办法都没有成功，最后用如下的存储过程成功实现功能，记录备忘。

CREATE PROCEDURE jsp_query_page @sql varchar(2000),@start int, @pageSize int as 

begin 
    declare @ipage int
    declare @rcount int 
    declare @execsql varchar(2000)
    declare @sql1 varchar(2000) 
    declare @t int,@p int,@n int,@l int

    begin

        set @sql1=@sql
        set @n=0
        set @l=0
        set @t=charindex('select ',lower(@sql))
        set @sql=substring(@sql,@t+7,char_length(@sql)-7)
        set @n=@n+1
        set @l=@l+7
        
        while(@n!=0)
        begin
            set @t=charindex('select ',lower(@sql))
            set @p=charindex('from ',lower(@sql))
            if ((@t<@p) and (@t!=0))
                begin
                    set @sql=substring(@sql,@t+7,char_length(@sql)-7)
                    set @n=@n+1
                    set @l=@l+6+@t
                end
            else
                begin
                    set @sql=substring(@sql,@p+5,char_length(@sql)-5)
                    set @n=@n-1
                    set @l=@l+4+@p
                end
        end
        set @execsql = substring(@sql1,1,@l-5)+' ,sybid=identity(12) into #temp '+substring(@sql1,@l-4,char_length(@sql1)-@l+5)
        select @rcount=@start + @pageSize
        set rowcount @rcount 
        set @execsql = @execsql || ' select * from #temp where sybid>' || convert(varchar,@start) || ' and sybid <= ' || convert(varchar,@rcount) 
        print @execsql
        execute (@execsql) 
        set rowcount 0 
    end
end