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From "Jacques Nadeau (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-707) Limit Operator incorrectly reports sv2 mode
Date Fri, 16 May 2014 10:58:57 GMT

    [ https://issues.apache.org/jira/browse/DRILL-707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13999199#comment-13999199
] 

Jacques Nadeau commented on DRILL-707:
--------------------------------------

resolved in c7746ed

> Limit Operator incorrectly reports sv2 mode
> -------------------------------------------
>
>                 Key: DRILL-707
>                 URL: https://issues.apache.org/jira/browse/DRILL-707
>             Project: Apache Drill
>          Issue Type: New Feature
>          Components: Client - C++
>            Reporter: Xiao Meng
>            Assignee: Jinfeng Ni
>         Attachments: Q1vsQ2.png
>
>
> -Drill C++ client needs to support selection vector.-
> The drillbit should never be sending sv2 to client.
> Queries with limit operator will return record batch with selection vector as true.
> For example, given the following hive table,
> {code}
> +------------+------------+
> | keycolumn  |  column1   |
> +------------+------------+
> | Zero       | 0          |
> | One        | 1          |
> | MinusOne   | -1         |
> | Two        | 2          |
> | MaxTInt    | 127        |
> | MinTInt    | -128       |
> | MaxUTInt   | 255        |
> | MaxTIntP1  | 128        |
> | MinTIntM1  | -129       |
> | MaxUTIntP1 | 256        |
> | MaxSInt    | 32767      |
> | MinSInt    | -32768     |
> | MaxUSInt   | 65535      |
> | MinSIntM1  | -32769     |
> | MaxSIntP1  | 32768      |
> | MaxUSIntP1 | 65536      |
> | MaxInt     | 2147483647 |
> | MinInt     | -2147483648 |
> | MaxUInt    | 4294967295 |
> | MaxIntP1   | 2147483648 |
> | MinIntM1   | -2147483649 |
> | MaxUIntP1  | 4294967296 |
> | MaxBInt    | 9223372036854775807 |
> | MinBInt    | -9223372036854775808 |
> +------------+------------+
> {code}
> We issue the following two queries:
> Query 1:
> {code}
> select column1 from hivestg.`bigint_table` where keycolumn='Zero'
> {code}
> Query 2:
> {code}
> select column1 from hivestg.`bigint_table` limit 1
> {code}
> Query 2 will return record batch with is_section_vector_2 as true



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