輸入order by 的sqeuence是，應該為「 desc」或者「 asc」
若輸入兩個order by則，v_order_field=" a[sequence] ,order by b "
create or replace procedure tablepage_select(v_page_size int, --the size of a page of list
v_current_page int, --the current page of list
v_table_name varchar2, --the talbe name
v_order_field varchar2,--the order field
v_order_sequence varchar2,--the order sequence should by "_desc"or "_asc",_is blank.
--v_sql_select varchar2, --the select sql for procedure
--v_sql_count varchar2, --the count sql for procedure
--v_out_recordcount out int, --the num of return rows
p_cursor out refcursor_pkg.return_cursor) as
v_sql varchar2(3000); --the sql for select all rows of list
v_sql_count varchar2(3000); --the count sql for procedure
v_sql_order varchar2(2000); --the order of list
v_count int; -- the amount rows fo original list
v_endrownum int; --the end row num of the current page
v_startrownum int; --the start row num of the current page
begin
----set the order of list
if v_order_field!='no' then
v_sql_order :=' order by '|| v_order_field ||' '||v_order_sequence;
else
v_sql_order :='';
end if;
----catch the amount rows of list
v_sql_count:='select count(rownum) from '||v_table_name;
execute immediate v_sql_count into v_count;
-- v_out_recordcount := v_count;
----set the value of start and end row
if v_order_sequence='desc' then
v_endrownum:=v_count-(v_current_page-1)*v_page_size;
v_startrownum:=v_endrownum - v_page_size + 1;
else
v_endrownum:= v_current_page * v_page_size;
v_startrownum := v_endrownum - v_page_size + 1;
end if;
----the sql for page slide
v_sql := 'select * from (select '||v_table_name||'.*, rownum rn from '||v_table_name||' where rownum <= ' ||
to_char(v_endrownum) ||' '|| v_sql_order||') where rn >= ' ||
to_char(v_startrownum)||' '||v_sql_order;
open p_cursor for v_sql;
end tablepage_select;
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