[jira] [Updated] (HIVE-14454) Vectorization: Varchar() -> String should not copy underlying buffers

["Gopal V (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-14454?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gopal V updated HIVE-14454:
---------------------------
    Assignee: Gopal V
      Status: Patch Available  (was: Open)

> Vectorization: Varchar() -> String should not copy underlying buffers
> ---------------------------------------------------------------------
>
>                 Key: HIVE-14454
>                 URL: https://issues.apache.org/jira/browse/HIVE-14454
>             Project: Hive
>          Issue Type: Improvement
>          Components: Vectorization
>    Affects Versions: 2.2.0
>            Reporter: Gopal V
>            Assignee: Gopal V
>         Attachments: HIVE-14454.1.patch
>
>
> The base byte[] array for a ByteColumnVector is immutable - all changes are made to a scratch column.
> {code}
>   @Override
>   protected void func(BytesColumnVector outV, byte[][] vector, int[] start, int[] length, int i) {
>     outV.setVal(i, vector[i], start[i], length[i]);
>   }
> {code}
> the setVal copies the byte[] array, losing dictionary encoding in the process.



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