eclipselink oracle 标识符太长 ORA-00972

Question

JPA (EclipseLink) 和 Oracle 数据库出现了奇怪的问题。

预计以下 JPQL：

SELECT w 
  FROM WfmStatusGroup w 
       LEFT JOIN w.statuses ws 
       LEFT JOIN ws.wfmTransList1 wt 
 WHERE wt.wfmWorkflowId = :wfmWorkflowId

但我收到以下错误：

ORA-00972: 标识符太长

在输出中也生成了以下查询。

SELECT t1.WFM_STATUS_GROUP_ID, t1.SYSTEM_ID, t1.WFM_STATUS_GROUP_DESC, 
       t1.WFM_STATUS_GROUP_NAME 
  FROM VERITECH_DEMO.WFM_STATUS_GROUP t1 
     LEFT OUTER JOIN (WFM_STATUS_GROUP_WFM_STATUS t3 
                JOIN VERITECH_DEMO.WFM_STATUS t0 
                   ON (t0.WFM_STATUS_ID = t3.statuses_WFM_STATUS_ID)) 
            ON (t3.WfmStatusGroup_WFM_STATUS_GROUP_ID = t1.WFM_STATUS_GROUP_ID) 
     LEFT OUTER JOIN (WFM_STATUS_WFM_TRANSITION t4 
                JOIN VERITECH_DEMO.WFM_TRANSITION t2 
                  ON (t2.WFM_TRANSITION_ID = t4.wfmTransList1_WFM_TRANSITION_ID)) 
            ON (t4.WfmStatus_WFM_STATUS_ID = t0.WFM_STATUS_ID) 
 WHERE (t2.WFM_WORKFLOW_ID = ?)

有什么建议吗？

Answer 1

此错误表明您有一个大于 oracle 可以处理的字段名称或对象名称，例如此 wfmTransList1_WFM_TRANSITION_ID 有 31 个字符，而 oracle 只接受 30 个字符作为字段名称。

请在此处查看此答案：Change table/column/index names size in oracle 11g or 12c