相关疑难解决方法(0)

这意味着什么,我该如何解决它？

SELECT MySequence.CURRVAL FROM DUAL;

结果:

ORA-08002:此会话中尚未定义序列MySequence.CURRVAL

我正在使用liquibase来管理我的架构.我有一堆插入语句.我已经硬编码了primary-id号码.完成所有插入操作后,我想将序列值更改为比表中主键的最大值多1.为此,我写了一个PL/SQL,如下所示.但是,当我执行select ArtifactTypes_id_seq.nextval from dual;它时仍然增加0.

SET SERVEROUTPUT ON SIZE 1000000
DECLARE
    sequence_id NUMBER;
BEGIN

    SELECT NVL(MAX(idArtifactType), 0) + 1 INTO sequence_id FROM ArtifactTypes;
    EXECUTE IMMEDIATE 'ALTER SEQUENCE saas.ArtifactTypes_id_seq INCREMENT BY ' || sequence_id;
    EXECUTE IMMEDIATE 'SELECT ArtifactTypes_id_seq.nextval FROM dual';
    EXECUTE IMMEDIATE 'ALTER SEQUENCE saas.ArtifactTypes_id_seq INCREMENT BY 1';
    DBMS_OUTPUT.put_line('Executed "ALTER SEQUENCE saas.ArtifactTypes_id_seq INCREMENT BY ' || sequence_id || '"');
END;
/

DBMS_OUTPUT提供以下输出 -
Executed "ALTER SEQUENCE saas.ArtifactTypes_id_seq INCREMENT BY 71"

我错过了什么？我做错了吗？注意:我尝试从SQLDeveloper执行这些SQL.

我正在使用oracle 11g.我遇到了创建序列,它提出了一个问题

是否可以使用java回滚序列？

如果可以,请建议我？