> On Sep 24, 2022, at 08:29, Barry Kimelman <blkimelman@xxxxxxxxx> wrote: > Thanks for the response. When I ran the INSERT with your suggested change I got an error message telling me > "column reference 'company_name' is ambiguous" As previously noted, you'll need to do both: add "excluded." to qualify the column names in the UPDATE. Here's a contrived example: xof=# create table t(i integer, j integer, k integer); CREATE TABLE xof=# create unique index on t(i) where j != 0; CREATE INDEX xof=# insert into t(i, j, k) values(1, 2, 3) on conflict (i) do update set k=k+1; ERROR: column reference "k" is ambiguous LINE 1: ..., j, k) values(1, 2, 3) on conflict (i) do update set k=k+1; xof=# insert into t(i, j, k) values(1, 2, 3) on conflict (i) do update set k=excluded.k+1; ERROR: there is no unique or exclusion constraint matching the ON CONFLICT specification xof=# insert into t(i, j, k) values(1, 2, 3) on conflict (i) where j != 0 do update set k=excluded.k+1; INSERT 0 1
