PLSQL的TABEL数据类型总结(转)未完
2015-03-27 14:12 whitecf 阅读(353) 评论(0) 编辑 收藏 举报PL/SQL表---table()函数用法:
利用table()函数,我们可以将PL/SQL返回的结果集代替table。
simple example:
1、table()结合数组:
create or replace type t_test as object(
id integer,
rq date,
mc varchar2(60)
);
create or replace type t_test_table as table of t_test;
create or replace function f_test_array(n in number default null) return t_test_table
as
v_test t_test_table := t_test_table();
begin
for i in 1 .. nvl(n,100) loop
v_test.extend();
v_test(v_test.count) := t_test(i,sysdate,'mc'||i);
end loop;
return v_test;
end f_test_array;
select * from table(f_test_array(10));
/*
2、table()结合PIPELINED函数:
*/
create or replace function f_test_pipe(n in number default null) return t_test_table PIPELINED
as
v_test t_test_table := t_test_table();
begin
for i in 1 .. nvl(n,100) loop
pipe row(t_test(i,sysdate,'mc'||i));
end loop;
return;
end f_test_pipe;
/
select * from table(f_test_pipe(20));
/*
3、table()结合系统包:
*/
create table test (id varchar2(20));
insert into test values('1');
commit;
explain plan for select * from test;
select * from table(dbms_xplan.display);
-- TABLE 类型的遍历
--方法一:
declare
i integer ;
rec_coverage_new gums_package_underwriting.salary_changed_tab;--table类型
begin
rec_coverage_new := gums_package_underwriting.get_salary_changed_info('PA01000002608233');
i := rec_coverage_new.first;
loop
exit when i is null;
dbms_output.put_line(i);
i := rec_coverage_new.next(i);
end loop;
end;
--方法二:
declare
i integer ;
rec_coverage_new gums_package_underwriting.salary_changed_tab;--table类型
begin
rec_coverage_new := gums_package_underwriting.get_salary_changed_info('PA01000002608233');
i := 0;
while i<rec_coverage_new.count loop
i :=i+1; --从1开始
dbms_output.put_line(i);
end loop;
end;
--方法三:
declare
i integer ;
rec_coverage_new gums_package_underwriting.salary_changed_tab;--table类型
begin
rec_coverage_new := gums_package_underwriting.get_salary_changed_info('PA01000002608233');
i := rec_coverage_new.first ;
while i<= rec_coverage_new.last loop
--从1开始
dbms_output.put_line(i);
--i :=i+1;
i := rec_coverage_new.next(i);
end loop;
end;