使用select for update 的时候的几个问题
1,使用显示静态游标
eg:
create table tb_test_1 (id number,
name varchar2(20));
insert into tb_test_1 (id, name) values (1, 'name');
declare
my_test test.tb_test_1%rowtype;
cursor cs is
select * from tb_test_1 for update;
begin
for css in cs loop
my_test.id := css.id;
my_test.name := css.name || 's';
update tb_test_1 a
set a.id = my_test.id, a.name = my_test.name
where current of cs;
end loop;
commit;
end;
若:
declare
my_test test.tb_test_1%rowtype;
type cs is ref cursor;
css cs;
begin
open css for
select * from tb_test_1 for update;
loop
fetch css into my_test;
exit when css%notfound;
update tb_test_1 a
set a.id = my_test.id, a.name = my_test.name||'s'
where current of css;
end loop;
commit;
end;
则ora-06550
2,注意loop内不能commit
eg:
insert into tb_test_1 (id, name) values (2, 'name2');
declare
my_test test.tb_test_1%rowtype;
cursor cs is
select * from tb_test_1 for update;
begin
for css in cs loop
my_test.id := css.id;
my_test.name := css.name || 's';
update tb_test_1 a
set a.id = my_test.id, a.name = my_test.name
where current of cs;
commit;
end loop;
commit;
end;
则:ora-01002
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