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https://issues.apache.org/jira/browse/ARROW-5215?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Antoine Pitrou updated ARROW-5215:
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Description:
Currently, there's no way to choose the index type with DictionaryBuilder.
Consequently, it's difficult to implement e.g. casts to a specific dictionary
type (instead the DictionaryBuilder will select the smallest possible integer
size for the index type).
This will allow implementing "null to dict" casting.
was:
Currently, there's no way to choose the index type with DictionaryBuilder.
Consequently, it's difficult to implement e.g. casts to an specific dictionary
type (instead the DictionaryBuilder will select the smallest possible integer
size for the index type).
This will allow implementing "null to dict" casting.
> [C++] Need a way to change integer size in DictBuilder and AdaptiveIntBuilder
> -----------------------------------------------------------------------------
>
> Key: ARROW-5215
> URL: https://issues.apache.org/jira/browse/ARROW-5215
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Affects Versions: 0.13.0
> Reporter: Antoine Pitrou
> Priority: Major
>
> Currently, there's no way to choose the index type with DictionaryBuilder.
> Consequently, it's difficult to implement e.g. casts to a specific dictionary
> type (instead the DictionaryBuilder will select the smallest possible integer
> size for the index type).
> This will allow implementing "null to dict" casting.
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