Concurrency 并发插入中违反了唯一约束(ORA-00001)
我有一个从并发事务调用的过程:Concurrency 并发插入中违反了唯一约束(ORA-00001),concurrency,oracle11g,primary-key,unique-constraint,Concurrency,Oracle11g,Primary Key,Unique Constraint,我有一个从并发事务调用的过程: //Some actions here INSERT INTO table1 (table1_id, table1_val1, table1_val2, table1_val3) VALUES (gettablenewid('TABLE1'), val1, val2, val3); INSERT INTO table1 (table1_i
//Some actions here
INSERT INTO table1
(table1_id, table1_val1, table1_val2, table1_val3)
VALUES
(gettablenewid('TABLE1'), val1, val2, val3);
INSERT INTO table1
(table1_id, table1_val1, table1_val2, table1_val3)
VALUES
(gettablenewid('TABLE1'), val1, val2, val3);
INSERT INTO table1
(table1_id, table1_val1, table1_val2, table1_val3)
VALUES
(gettablenewid('TABLE1'), val1, val2, val3);
//some other actions
函数gettablenewid代码(id\u表存储每个表的PK):
偶尔insert语句会因ORA-00001 for table1\u id而失败,我无法理解为什么会发生这种情况。所以,正如Scott Lamb所说,代码中没有错误。我发现另一个进程同时修改了表标识符为“TABLE1”的id\u表。谢谢大家的帮助。+1。SELECT FOR UPDATE和AUTONOMONIC_事务应考虑并发序列增量。当然,更安全、更简单的方法是只使用一个全局序列,而不关心id中的间隙。我没有看到错误,所以可能是在你没有发布的内容中。您确定id_table的table_identifier列上有唯一的约束,还是TABLE1有两个id_table行?您确定table1_id是违反其唯一约束的列,还是有其他唯一约束可能导致此错误?@ScottLamb可能是我发布的内容中没有的问题,我将继续搜索答案。。。但我确信表id约束的错误是ora-00001,并且我确信在表“id\u table”中有一行表示“TABLE1”。无论如何,谢谢你。
create or replace
function GetTableNewId(tablename in varchar2)
return number is
PRAGMA AUTONOMOUS_TRANSACTION;
Result number;
cursor c1 is SELECT ig.id_value+1 id_new
FROM id_table ig
WHERE ig.table_identifier = tablename
FOR UPDATE of ig.id_value;
begin
for c1_rec in c1 loop
UPDATE id_table ig
SET ig.id_value = c1_rec.id_new
WHERE current of c1 ;
Result:=c1_rec.id_new;
end loop;
commit;
return(Result);
end GetTableNewId;