You can build `compure::Expression` instances [1] and use them in different contexts like scanning datasets [2] and producing Substrait plans [3] that you can execute.
But you have to write your own parser and define the scope and semantics of the operations you would support. [1] https://github.com/apache/arrow/blob/main/cpp/src/arrow/compute/expression.h#L45 [2] https://github.com/apache/arrow/blob/main/cpp/examples/arrow/dataset_documentation_example.cc#L266 [3] https://github.com/apache/arrow/blob/main/cpp/src/arrow/engine/substrait/relation.h#L55 -- Felipe On Wed, Aug 28, 2024 at 1:11 AM Surya Kiran Gullapalli < suryakiran.gullapa...@gmail.com> wrote: > Hello all, > Let's say I've a table containing 3 columns 'A', 'B', and 'C'. Is it > possible to create a 4th column 'D' using a formula (like (A+B)/C) ? > > I know I can manually create them using compute functions, but is it > possible to parse a formula like the above and compute the column on the > fly at runtime ? > > Any pointers are greatly appreciated. > > Thanks, > Surya >
