当使用OCCI删除永远运行

Question

同一行：

boolean

SQL Developer上的

正常运行，并且使用occi API需要永远。

我已检查过查询＆＃34; SELECT * FROM tablename WHERE id = 12＆＃34;匹配非空行集。

更具体地说，我使用以下语法：

DELETE(SELECT * FROM tablename WHERE id=12)

Answer 1

我怀疑在你的情况下，你只是得到了未提交的交易。就是这样：

session1                   session2
DELETE ...                                        table/rows is locked

                           SELECT * FROM ...      you will see all data

                           DELETE ...             and now you will wait and wait
                                                  until lock is released

COMMIT;
                           SELECT * FROM ...      now resultset is empty

我强烈建议您阅读Data Concurrency and Consistency