Added cache for low cardinality function result. #3200
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KochetovNicolai
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| @@ -109,8 +109,8 @@ namespace | |||
| } | |||
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| ColumnWithDictionary::ColumnWithDictionary(MutableColumnPtr && column_unique_, MutableColumnPtr && indexes_) | |||
| : dictionary(std::move(column_unique_)), idx(std::move(indexes_)) | |||
| ColumnWithDictionary::ColumnWithDictionary(MutableColumnPtr && column_unique_, MutableColumnPtr && indexes_, bool is_shared) | |||
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Missing comment about is_shared.
We should try to utilize COWPtr for this purpose (to unshare ColumnUnique on mutating operations).
| @@ -41,6 +42,64 @@ namespace ErrorCodes | |||
| } | |||
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| class PreparedFunctionLowCardinalityResultCache | |||
| @@ -87,7 +90,8 @@ struct ExpressionAction | |||
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| /// For APPLY_FUNCTION and LEFT ARRAY JOIN. | |||
| FunctionBuilderPtr function_builder; | |||
| FunctionBasePtr function; | |||
| FunctionBasePtr function_base; | |||
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