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https://issues.apache.org/jira/browse/DRILL-707?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jacques Nadeau reassigned DRILL-707:
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Assignee: Jinfeng Ni
Jinfeng, can you work through this? I started to play with a fix on this
branch [1]. However, I think the correct fix is actually to make the remover
use allocateNewSafe everywhere and rely on the vectors to decide their sizes
rather than using the VectorAllocator functionality.
[1] https://github.com/jacques-n/incubator-drill/tree/complex_allocators
> Support value vectors with selection vector in Drill C++ Client
> ---------------------------------------------------------------
>
> 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.
> Some queries 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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