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Posted to issues@orc.apache.org by "Prasanth Jayachandran (JIRA)" <ji...@apache.org> on 2018/06/29 21:16:00 UTC

[jira] [Closed] (ORC-380) Add isOnlyImplicitConversion boolean function to SchemaEvolution

     [ https://issues.apache.org/jira/browse/ORC-380?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Prasanth Jayachandran closed ORC-380.
-------------------------------------

> Add isOnlyImplicitConversion boolean function to SchemaEvolution
> ----------------------------------------------------------------
>
>                 Key: ORC-380
>                 URL: https://issues.apache.org/jira/browse/ORC-380
>             Project: ORC
>          Issue Type: Bug
>          Components: ORCv2
>            Reporter: Matt McCline
>            Assignee: Matt McCline
>            Priority: Critical
>             Fix For: 1.5.2, 1.6.0
>
>
> The current hasConversion boolean function returns true if there is *any* conversion between the reader and file schemas.  Prasanth pointed out this is too strict for the check I'm adding in HIVE-19951: "Vectorization: Need to disable encoded LLAP I/O for ORC when there is data type conversion  (Schema Evolution)".  He points out that integer type widening and float to double ought to be allowed.



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