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From "Cheng Lian (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (SPARK-6195) Specialized in-memory column type for fixed-precision decimal
Date Wed, 18 Mar 2015 08:39:38 GMT

     [ https://issues.apache.org/jira/browse/SPARK-6195?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Cheng Lian updated SPARK-6195:
------------------------------
    Summary: Specialized in-memory column type for fixed-precision decimal  (was: Specialized
in-memory column type for decimal)

> Specialized in-memory column type for fixed-precision decimal
> -------------------------------------------------------------
>
>                 Key: SPARK-6195
>                 URL: https://issues.apache.org/jira/browse/SPARK-6195
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 1.1.1, 1.3.0, 1.2.1
>            Reporter: Cheng Lian
>            Assignee: Cheng Lian
>             Fix For: 1.4.0
>
>
> When building in-memory columnar representation, decimal values are currently serialized
via a generic serializer, which is unnecessarily slow. Since some decimals (precision <
19) can be represented as annotated long values, we should add a specialized fixed-precision
decimal column type to speed up in-memory decimal serialization.



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