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From "Aaron Kimball (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (SQOOP-308) Generated Avro Schema cannot handle nullable fields
Date Thu, 04 Aug 2011 00:57:27 GMT

    [ https://issues.apache.org/jira/browse/SQOOP-308?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13079158#comment-13079158
] 

Aaron Kimball commented on SQOOP-308:
-------------------------------------

That's a far more invasive change, I think. Everywhere else in Sqoop (read: the existing ClassWriter)
we assume all types are nullable. This would require modifying the ConnManager API to return
nullability for all columns via a new method named something like "getNullabilityForColumns()"
or else incompatibly changing {{getColumnTypesForQuery()}} to return a complex datatype that
includes nullability and "normal" typing information. (And thus putting a lot of changes in
orm.ClassWriter too.)


> Generated Avro Schema cannot handle nullable fields
> ---------------------------------------------------
>
>                 Key: SQOOP-308
>                 URL: https://issues.apache.org/jira/browse/SQOOP-308
>             Project: Sqoop
>          Issue Type: Bug
>          Components: codegen
>    Affects Versions: 1.3.0
>            Reporter: Aaron Kimball
>            Assignee: Aaron Kimball
>             Fix For: 1.4.0
>
>         Attachments: SQOOP-308.patch
>
>
> The generated avro schema for each column is just a primitive type. If a database contains
a null value, this will fail.

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