Vladimir Sitnikov created CALCITE-4612:
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Summary: Fuzzer for RelBuilder
Key: CALCITE-4612
URL: https://issues.apache.org/jira/browse/CALCITE-4612
Project: Calcite
Issue Type: Test
Components: core
Reporter: Vladimir Sitnikov
A generator of random rels would be useful for testing:
a) Generate rel, write it down as SQL (ensures "Rel to SQL" does not fail),
parse it back (ensures parser works OK), plans the tree (ensures the rules do
not throw exceptions)
b) Generate rel, serialize with one of the adapters (e.g. serialize to
ElasticSearch).
c) Generate rel, and execute it with https://github.com/sqlancer/sqlancer (or
alike) approach to verify the results of the query. It might surface
**correctness** bugs in optimizer, not just NPEs
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