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From "Guillaume Champion (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-5088) Error when reading DBRef column
Date Thu, 01 Dec 2016 16:20:58 GMT
Guillaume Champion created DRILL-5088:
-----------------------------------------

             Summary: Error when reading DBRef column
                 Key: DRILL-5088
                 URL: https://issues.apache.org/jira/browse/DRILL-5088
             Project: Apache Drill
          Issue Type: Bug
          Components: Execution - Data Types
         Environment: drill 1.9.0
mongo 3.2
            Reporter: Guillaume Champion


In a mongo database with DBRef, when a DBRef is inserted in the first line of mongo's collection
drill query failed :
{code}
0: jdbc:drill:zk=local> select * from mongo.mydb.contact2;
Error: SYSTEM ERROR: CodecConfigurationException: Can't find a codec for class com.mongodb.DBRef.
{code}

Simple example to reproduce:
In mongo instance
{code}
db.contact2.drop();
db.contact2.insert({ "_id" : ObjectId("582081d96b69060001fd8938"), "account" : DBRef("contact",
ObjectId("999cbf116b69060001fd8611")) });
{code}

In drill :
{code}
0: jdbc:drill:zk=local> select * from mongo.mydb.contact2;
Error: SYSTEM ERROR: CodecConfigurationException: Can't find a codec for class com.mongodb.DBRef.


[Error Id: 2944d766-e483-4453-a706-3d481397b186 on Analytics-Biznet:31010] (state=,code=0)
{code}

If the first line doesn't contain de DBRef, drill will querying correctly :
In a mongo instance :
{code}
db.contact2.drop();
db.contact2.insert({ "_id" : ObjectId("582081d96b69060001fd8939") });
db.contact2.insert({ "_id" : ObjectId("582081d96b69060001fd8938"), "account" : DBRef("contact",
ObjectId("999cbf116b69060001fd8611")) });
{code}

In drill :
{code}
0: jdbc:drill:zk=local> select * from mongo.mydb.contact2;
+--------------------------------------+---------------------------------------------------------------+
|                 _id                  |                            account              
             |
+--------------------------------------+---------------------------------------------------------------+
| {"$oid":"582081d96b69060001fd8939"}  | {"$id":{}}                                      
             |
| {"$oid":"582081d96b69060001fd8938"}  | {"$ref":"contact","$id":{"$oid":"999cbf116b69060001fd8611"}}
 |
+--------------------------------------+---------------------------------------------------------------+
2 rows selected (0,563 seconds)
{code}



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