It's not a public facing product, but there was a talk from a team at Alibaba a couple of months ago during CMU's "ML⇄DB Seminar Series" [0] on how they augment

It's not a public facing product, but there was a talk from a team at Alibaba a couple of months ago during CMU's "ML⇄DB Seminar Series" [0] on how they augmented their NL2SQL transformer model with "Semantics Correction [...] a post-processing routine, which checks the initially generated SQL queries by applying rules to identify and correct semantic errors" [1]. It will be interesting to see whether VC-backed teams can keep up with the state of the art coming out of BigCorps. [0] "Alibaba: Domain Knowledge Augmented AI for Databases (Jian Tan)" - https://www.youtube.com/watch?v=dsgHthzROj4&list=PLSE8ODhjZXjYVdJKka5g3xTKfPBITrxOu&index=11 https://www.youtube.com/watch?v=dsgHthzROj4&list=PLSE8ODhjZX... [1] "CatSQL: Towards Real World Natural Language to SQL Applications" - https://www.vldb.org/pvldb/vol16/p1534-fu.pdf https://www.vldb.org/pvldb/vol16/p1534-fu.pdf