fdlzp commented on issue #2138: Could not commit JPA transaction when I use 
save to insert data to oracledatabase
URL: 
https://github.com/apache/incubator-shardingsphere/issues/2138#issuecomment-483090159
 
 
   Howerver, there are three problem.
   1、It costs a long time to connect to the database. (version 3.0.0.M2~3.1.0)
   It takes an average of 1 hour.
   
![图片](https://user-images.githubusercontent.com/44960833/56104749-b38ccf80-5f6b-11e9-8da1-da7521b2aba1.png)
   
   This may be caused by the sql:
   SELECT NULL AS table_cat,        o.owner AS table_schem,        
o.object_name AS table_name,        o.object_type AS table_type,        NULL AS 
remarks  FROM all_object o WHERE o.owner LIKE :1 ESC
   and
   begin :rept := dbms_report.get_report(:report_ref, :content, :comp); end;
   
   I didn't go to find the deep reason.
   
   https://github.com/apache/incubator-shardingsphere/issues/1933
   Which version solves this problem?   4.x?

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