Oracle 如何确保所有事务都已提交或回滚?
我有一个PL/SQL过程,例如:Oracle 如何确保所有事务都已提交或回滚?,oracle,plsql,Oracle,Plsql,我有一个PL/SQL过程,例如: procedure MyProcedure() is begin insert into table1 (field1, Field2) values ('value1','value2'); -- do some staff insert into table2 (field1, Field2) values ('value1','value2'); -- do some staff delete from
procedure MyProcedure() is
begin
insert into table1 (field1, Field2) values ('value1','value2');
-- do some staff
insert into table2 (field1, Field2) values ('value1','value2');
-- do some staff
delete from table3 where id = xx;
-- do some staff
end;
一些程序说明可能会失败,我希望所有说明之间保持一定的一致性。这意味着,如果一条指令失败,我希望所有其他指令都回滚。所以要么一切都被执行,要么什么都不执行
有人知道怎么做吗
先谢谢你
干杯,在结束时做出一个
提交代码>或回滚代码>-就是这样。当然,只有在中间没有执行隐式提交的命令时,才能获得预期的行为,例如,TRUNCATE TABLE…
最后执行提交代码>或回滚代码>-就是这样。当然,只有在中间没有执行隐式提交的命令时,才能获得预期的行为,例如,TRUNCATE TABLE…
如果发生任何错误,可以引发异常并回滚,如果没有发生错误,则可以添加提交。
注意,如果将来添加任何DDL语句(create、alter),这些语句将被提交
BEGIN
insert into table1 (field1, Field2) values ('value1','value2');
-- do some staff
insert into table2 (field1, Field2) values ('value1','value2');
-- do some staff
delete from table3 where id = xx;
commit;
-- if any error occured
WHEN OTHERS THEN
rollback;
END;
/
如果发生任何错误,可以引发异常并回滚,如果未发生错误,则可以添加提交。
注意,如果将来添加任何DDL语句(create、alter),这些语句将被提交
BEGIN
insert into table1 (field1, Field2) values ('value1','value2');
-- do some staff
insert into table2 (field1, Field2) values ('value1','value2');
-- do some staff
delete from table3 where id = xx;
commit;
-- if any error occured
WHEN OTHERS THEN
rollback;
END;
/
事务控制最好发生在被调用的地方,而不是在过程内部,除非它是自治事务
procedure MyProcedure( ret_status out int ) is
..
..
调用(可以是另一个过程/块或Web应用程序)
此外,最好在异常部分调用日志过程或带有相关错误消息的dbms\u输出。事务控制最好发生在被调用的地方,而不是在过程内部,除非它是自治事务
procedure MyProcedure( ret_status out int ) is
..
..
调用(可以是另一个过程/块或Web应用程序)
此外,最好在异常部分调用日志过程或带有相关错误消息的dbms\u输出。您要求的或多或少是默认行为:
create table test1 (id integer not null);
create table test2 (id integer not null);
create table test3 (id integer not null);
create or replace procedure myProcedure
( p1 test1.id%type
, p2 test2.id%type
, p3 test3.id%type )
as
begin
insert into test1 (id) values (p1);
insert into test2 (id) values (p2);
insert into test3 (id) values (p3);
end myProcedure;
/
call myProcedure(1, 2, 3);
-- completes successfully
call myProcedure(1, 2, null);
-- fails with:
-- ERROR at line 1:
-- ORA-01400: cannot insert NULL into ("WILLIAM"."TEST3"."ID")
-- ORA-06512: at "WILLIAM.MYPROCEDURE", line 9
select 'test1' as table_name, test1.id from test1 union all
select 'test2', test2.id from test2 union all
select 'test3', test3.id from test3
order by 1;
TABLE ID
----- ----------
test1 1
test2 2
test3 3
3 rows selected.
因此,我有成功调用中的三行,失败调用中没有任何行,所有这些都没有显式提交或回滚
如果您真的希望提交,可以在过程的末尾添加一个commit
(这并不总是一个好主意,但要求各不相同)
但是,只有当异常一直传播到调用方时,才会发生默认的“回滚到隐式保存点”行为,例如,如果我尝试使用以下方法处理它:
begin
delete test1;
delete test2;
delete test3;
myProcedure(1, 2, null);
exception
when others then
dbms_output.put_line(sqlerrm);
dbms_output.put_line(dbms_utility.format_error_backtrace);
end;
ORA-01400: cannot insert NULL into ("WILLIAM"."TEST3"."ID")
ORA-06512: at "WILLIAM.MYPROCEDURE", line 9
ORA-06512: at line 6
PL/SQL procedure successfully completed.
现在,由于块成功完成,我有部分失败的运行的值:
select 'test1' as table_name, test1.id from test1 union all
select 'test2', test2.id from test2 union all
select 'test3', test3.id from test3
order by 1;
TABLE ID
----- ----------
test1 1
test2 2
2 rows selected.
无论如何,要明确地处理所有这些问题,您可能需要以下内容:
create or replace procedure myProcedure
( p1 test1.id%type
, p2 test2.id%type
, p3 test3.id%type )
as
begin
savepoint start_of_processing;
insert into test1 (id) values (p1);
insert into test2 (id) values (p2);
insert into test3 (id) values (p3);
commit;
exception
when others then
rollback to start_of_processing;
-- Log using whatever logging package you have:
logger.message('Something appears to have gone disastrously amiss');
raise;
end myProcedure;
不过,请记住这一点。据我所知,这在所有编程语言中都是正确的。您要求的或多或少是默认行为:
create table test1 (id integer not null);
create table test2 (id integer not null);
create table test3 (id integer not null);
create or replace procedure myProcedure
( p1 test1.id%type
, p2 test2.id%type
, p3 test3.id%type )
as
begin
insert into test1 (id) values (p1);
insert into test2 (id) values (p2);
insert into test3 (id) values (p3);
end myProcedure;
/
call myProcedure(1, 2, 3);
-- completes successfully
call myProcedure(1, 2, null);
-- fails with:
-- ERROR at line 1:
-- ORA-01400: cannot insert NULL into ("WILLIAM"."TEST3"."ID")
-- ORA-06512: at "WILLIAM.MYPROCEDURE", line 9
select 'test1' as table_name, test1.id from test1 union all
select 'test2', test2.id from test2 union all
select 'test3', test3.id from test3
order by 1;
TABLE ID
----- ----------
test1 1
test2 2
test3 3
3 rows selected.
因此,我有成功调用中的三行,失败调用中没有任何行,所有这些都没有显式提交或回滚
如果您真的希望提交,可以在过程的末尾添加一个commit
(这并不总是一个好主意,但要求各不相同)
但是,只有当异常一直传播到调用方时,才会发生默认的“回滚到隐式保存点”行为,例如,如果我尝试使用以下方法处理它:
begin
delete test1;
delete test2;
delete test3;
myProcedure(1, 2, null);
exception
when others then
dbms_output.put_line(sqlerrm);
dbms_output.put_line(dbms_utility.format_error_backtrace);
end;
ORA-01400: cannot insert NULL into ("WILLIAM"."TEST3"."ID")
ORA-06512: at "WILLIAM.MYPROCEDURE", line 9
ORA-06512: at line 6
PL/SQL procedure successfully completed.
现在,由于块成功完成,我有部分失败的运行的值:
select 'test1' as table_name, test1.id from test1 union all
select 'test2', test2.id from test2 union all
select 'test3', test3.id from test3
order by 1;
TABLE ID
----- ----------
test1 1
test2 2
2 rows selected.
无论如何,要明确地处理所有这些问题,您可能需要以下内容:
create or replace procedure myProcedure
( p1 test1.id%type
, p2 test2.id%type
, p3 test3.id%type )
as
begin
savepoint start_of_processing;
insert into test1 (id) values (p1);
insert into test2 (id) values (p2);
insert into test3 (id) values (p3);
commit;
exception
when others then
rollback to start_of_processing;
-- Log using whatever logging package you have:
logger.message('Something appears to have gone disastrously amiss');
raise;
end myProcedure;
不过,请记住这一点。据我所知,这在所有编程语言中都是正确的。您可以添加一个异常,如果发生任何错误,则引发一个异常,您可以在其内部添加回滚。您可以添加一个异常,如果发生任何错误,则引发一个异常,您可以在其内部添加回滚