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From "Hyunsik Choi (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (TAJO-224) Rearrange DataType enumeration and Refactor type systems
Date Fri, 04 Oct 2013 03:08:45 GMT

     [ https://issues.apache.org/jira/browse/TAJO-224?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Hyunsik Choi updated TAJO-224:
------------------------------

    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

Thank you for the review. I've just committed it.

> Rearrange DataType enumeration and Refactor type systems
> --------------------------------------------------------
>
>                 Key: TAJO-224
>                 URL: https://issues.apache.org/jira/browse/TAJO-224
>             Project: Tajo
>          Issue Type: Improvement
>          Components: physical operator, planner/optimizer
>            Reporter: Hyunsik Choi
>            Assignee: Hyunsik Choi
>             Fix For: 0.2-incubating
>
>         Attachments: TAJO-224.patch
>
>
> This patch rebuilds DataType enumeration and refactors type systems for more efficiency
and extendibility of type. In detail, it does as follows:
> * Remove the array return value from EvalNode, all functions, and Catalog.
>  ** Now, all operators, functions, and expressions return only one data type.
>  ** Instead, a data type can be array.
> * Add Type.PROTOBUF type that enables Tajo to use a protocol buffer class as a type.
> * Remove ArrayDatum and Type.Array which are used in some functions, requiring return
two or more values.
>  ** Instead,  they use generated protobuf type as return types.
> * Add more rich data types to DataType.Type.
> * Add ProtobufDatum and ProtobufDatumFactory that help create Builder with only a data
type.
> * Cleanup Catalog and many others.



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