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https://issues.apache.org/jira/browse/CALCITE-3913?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17085361#comment-17085361
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Qi Zhou commented on CALCITE-3913:
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Z3 is not write in java, it is written in c++, but it has a java binding
library. The license is MIT license.
> Test correctness using formal verification techniques
> -----------------------------------------------------
>
> Key: CALCITE-3913
> URL: https://issues.apache.org/jira/browse/CALCITE-3913
> Project: Calcite
> Issue Type: Wish
> Reporter: Qi Zhou
> Priority: Major
>
> We have developed a technique that can formally be verified if two logical
> plans in calcite are indeed semantically equivalent. We published this paper
> in VLDB 2019. Here is the [link to the
> paper|https://www.vldb.org/pvldb/vol12/p1276-zhou.pdf].
> This technique converts two logical plan into their symbolic representations
> and using an SMT (Satisfiability modulo theories) solver to verify the
> relationship between two symbolic representations to verify the equivalence.
> We are wondering if it is possible that we can integrate this tool into
> calcite, as a way to help the correctness testing process in calcite.
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