kszucs commented on a change in pull request #10093:
URL: https://github.com/apache/arrow/pull/10093#discussion_r615430752
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File path: cpp/src/arrow/array/array_dict.cc
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@@ -80,7 +80,6 @@ int64_t DictionaryArray::GetValueIndex(int64_t i) const {
DictionaryArray::DictionaryArray(const std::shared_ptr<ArrayData>& data)
: dict_type_(checked_cast<const DictionaryType*>(data->type.get())) {
ARROW_CHECK_EQ(data->type->id(), Type::DICTIONARY);
- ARROW_CHECK_NE(data->dictionary, nullptr);
Review comment:
`array->dictionary()` lazily initializes the dictionary if it is not set
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