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https://issues.apache.org/jira/browse/ARROW-1559?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16255572#comment-16255572
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ASF GitHub Bot commented on ARROW-1559:
---------------------------------------
cpcloud commented on a change in pull request #1266: ARROW-1559: [C++] Add
Unique kernel and refactor DictionaryBuilder to be a stateful kernel
URL: https://github.com/apache/arrow/pull/1266#discussion_r151463749
##########
File path: cpp/src/arrow/type_traits.h
##########
@@ -430,6 +430,17 @@ static inline bool is_binary_like(Type::type type_id) {
return false;
}
+static inline bool is_dictionary(Type::type type_id) {
+ switch (type_id) {
Review comment:
Any reason not to simplify this to `return type_id == Type::DICTIONARY`?
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> [C++] Kernel implementations for "unique" (compute distinct elements of array)
> ------------------------------------------------------------------------------
>
> Key: ARROW-1559
> URL: https://issues.apache.org/jira/browse/ARROW-1559
> Project: Apache Arrow
> Issue Type: New Feature
> Components: C++
> Reporter: Wes McKinney
> Assignee: Uwe L. Korn
> Labels: Analytics, pull-request-available
> Fix For: 0.8.0
>
>
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