On Fri, 19 Apr 2024 at 05:48, Michael Corey <michael.corey.ap@xxxxxxxxxxx> wrote: > ALTER TABLE ONLY par_log_file > ADD CONSTRAINT plf_pk PRIMARY KEY (par_file_id); > ALTER TABLE par_log_definition > ADD CONSTRAINT pld_fk FOREIGN KEY (par_file_id) REFERENCES par_log_file(par_file_id); > I receive the following error when creating a foreign key between two partitioned tables. > ERROR: there is no unique constraint matching given keys for referenced table "par_log_file" > Version Postgres 13.13 No problems running that script here on 13.13. I imagine you've probably got a partition attached to par_log_file already and since your "plf_pk" constraint is on ONLY par_log_file, then the supporting index is likely invalid. I'd suggest checking if this is the case with: select indexrelid::regclass,indisvalid from pg_index where indrelid = 'par_log_file'::regclass; The correct way to create the PK constraint is with: ALTER TABLE par_log_file ADD CONSTRAINT plf_pk PRIMARY KEY (par_file_id); You might want to create supporting unique indexes on each partition CONCURRENTLY before doing that so that the ALTER TABLE becomes a meta-data-only operation. David
