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From "Qian Xu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SQOOP-1395) Potential naming conflict in Avro schema
Date Thu, 04 Sep 2014 03:11:51 GMT

     [ https://issues.apache.org/jira/browse/SQOOP-1395?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Qian Xu updated SQOOP-1395:
---------------------------
    Summary: Potential naming conflict in Avro schema  (was: Use random generated class name
for SqoopRecord)

> Potential naming conflict in Avro schema
> ----------------------------------------
>
>                 Key: SQOOP-1395
>                 URL: https://issues.apache.org/jira/browse/SQOOP-1395
>             Project: Sqoop
>          Issue Type: Sub-task
>          Components: tools
>            Reporter: Qian Xu
>            Assignee: Qian Xu
>            Priority: Minor
>
> If you import a table "users". Sqoop will generate an entity class named "users.java".
The class will be compiled, submitted and used by a mapreduce job. If the target file format
is Avro or Parquet, an Avro schema will be generated as well. According to Avro specification,
the entity class is described as "record", the name of the "record" is "users".
> For Parquet file format handling, we use the Kite SDK to manage Parquet file reading
and writing with minimal efforts. Kite requires an Avro schema and all data records to be
packed into GenericRecord instances. There will be a problem here. Kite will read the schema
first and try to instantiate a record regarding its name. In this case, Kite will try to instantiate
a "users" class. Unfortunately, there is a "users.java" out there. This will cause mapreduce
job fail. 
> In order to solve this problem, I intend to keep the name of the entity class and the
Avro record different.
> The patch will:
> Change the record name in Avro schema.
> Remove the SqoopAvroRecord, as it is no longer required. (ClassWriter.java is reverted
to previous state)



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