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Virtual generated columns in constraint expressions need to be expanded because the optimizer matches these expressions to qual clauses. Failing to do so can cause us to miss opportunities for constraint exclusion. Author: Richard Guo <guofenglinux@gmail.com> Discussion: https://www.postgresql.org/message-id/flat/204804c0-798f-4c72-bd1f-36116024fda3%40eisentraut.org