eclipselink oracle標識符太長ORA-00972

Question

JPA（EclipseLink）和Oracle數據庫存在一個奇怪的問題。

以下JPQL預計：

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

但我發現了以下錯誤：在輸出端產生

ORA-00972: Identifier is too long

而且下面的查詢。

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 = ?) 

任何建議？

Answer 1

此錯誤指出您有一個字段名稱或一個大於oracle可處理的對象名稱，例如，此wfmTransList1_WFM_TRANSITION_ID有31個字符，而oracle只接受30個字符作爲字段名稱。

這裏看到這個答案的SO：Change table/column/index names size in oracle 11g or 12c