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Rok Mihevc updated ARROW-4799: ------------------------------ External issue URL: https://github.com/apache/arrow/issues/21317 > [C++] Propose alternative strategy for handling Operation logical output types > ------------------------------------------------------------------------------ > > Key: ARROW-4799 > URL: https://issues.apache.org/jira/browse/ARROW-4799 > Project: Apache Arrow > Issue Type: Improvement > Components: C++ > Reporter: Wes McKinney > Priority: Major > > Currently in the prototype work in ARROW-4782, operations are being "boxed" > in a strongly typed Expr types. An alternative structure would be for an > operation to define a virtual > {code} > virtual std::shared_ptr<ArgType> out_type() const = 0; > {code} > Where {{ArgType}} is some class that encodes the arity (array vs. scalar > vs....) and value type (if any) that is emitted by the operation. > Operations emitting multiple pieces of data would need some kind of "tuple" > object output. We can iterate on this -- This message was sent by Atlassian Jira (v8.20.10#820010)