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From Neal Richardson <>
Subject Re: Does gandiva support the unary minus operator?
Date Fri, 24 Jul 2020 20:23:28 GMT
I can't answer the first question authoritatively, though off the top of my
head, could you translate that to `0 - x` and use the binary operator? You
may also consider posting this question to the mailing

As for contributing tutorials and user guides, yes, please do. I believe
the right location to add what you're talking about would be in


On Fri, Jul 24, 2020 at 12:42 PM Troy Zimmerman <> wrote:

> Hi,
> I’ve written a small library that uses the ast module to parse a Python
> expression into a Gandiva expression tree. I’d like to able to do numeric
> negation (i.e. -x) in an expression, but I’ve I looked through the source
> code and haven’t found a way to achieve this. (I could also be missing an
> obvious workaround.)
> Separately, are there any tutorials on using the Python bindings for
> Gandiva? If not, would the project be open to such a contribution? At the
> moment I’ve got scattershot notes of what I’ve learned from digging through
> the source, but could organize them into a brief tutorial or cookbook.
> Best,
> Troy

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