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Rok Mihevc updated ARROW-5327: ------------------------------ External issue URL: https://github.com/apache/arrow/issues/21788 > [C++] allow construction of ArrayBuilders from existing arrays > -------------------------------------------------------------- > > Key: ARROW-5327 > URL: https://issues.apache.org/jira/browse/ARROW-5327 > Project: Apache Arrow > Issue Type: New Feature > Components: C++ > Reporter: Ben Kietzman > Priority: Major > > After calling Finish it may become necessary to append further elements to an > array, which we don't currently support. One way to support this would be > consuming the array to produce a builder with the array's elements > pre-inserted. > {code} > std::shared_ptr<Array> array = get_array(); > std::unique_ptr<ArrayBuilder> builder; > RETURN_NOT_OK(MakeBuilder(std::move(*array), &builder)); > {code} > This will be efficient if we cannibalize the array's buffers and child data > when constructing the builder, which will require that the consumed array is > uniquely owned. -- This message was sent by Atlassian Jira (v8.20.10#820010)