This nails down the cause, thanks a lot for the link! Apparently I missed it from PostgreSQL 10 release notes, where it is present in the “Queries” section, although AFAIK it deserved an entry in the "migration to version 10”, as it may potentially make dump/restore from previous versions to version 10 error out if there are table constraints that use regex classes over the Unicode text fields with code points above U+7FF.
Agreed. Cheers, Alex |