Christophe Pettus: All Your GUCs in a Row: array_nulls (Special Update)
Tom Lane deleted `array_nulls` in PostgreSQL 20, but `pg_dump` never set it, so restores into databases with it disabled silently corrupt text arrays. (I consult on PostgreSQL through PGX Inc..)
Sources
- T2Christophe Pettus: All Your GUCs in a Row: array_nulls (Special Update)Planet PostgreSQL