On Fri, Sep 23, 2022 at 4:42 PM Steve Baldwin <steve.baldwin@xxxxxxxxx> wrote:
You need to prefix the rhs column(s) with 'excluded.'. For example:on conflict (company_name) do update set company_name = concat(excluded.company_name,'++',excluded.string_company_id);On Sat, Sep 24, 2022 at 7:28 AM Barry Kimelman <blkimelman@xxxxxxxxx> wrote:
I have not been able to get the "ON CONFLICT" clause to work
I am using psql 14.4 on ubuntu
Given the following table definition
CREATE TABLE my_companies (
company_id SERIAL NOT NULL PRIMARY KEY,
second_id INTEGER NOT NULL REFERENCES big_list(second_id),
string_company_id TEXT NOT NULL,
company_name TEXT NOT NULL,
person_name TEXT NOT NULL
)
INHERITS ( _audit_table, _delete_table );
and the following constraints
CREATE UNIQUE INDEX my_companies_id_unique ON my_companies(string_company_id) WHERE delete_timestamp IS NULL;
CREATE UNIQUE INDEX my_companies_company_name_unique ON my_companies(company_name) WHERE delete_timestamp IS NULL;
I issued the following sql insert in an attempt to use "on conflict" to update the
duplicate column name
insert into my_companies (second_id,string_company_id,company_name,person_name)
values (1,'66','widgets','seller-toto')
on conflict (company_name) do update set company_name = concat(company_name,'++',string_company_id);
In this example a record with a company name of 'widgets' already exists and will
result in an constraint violation
when I ran my sql statement I received the following error message
bkimelman=# \i insert-companies-1c.sql
psql:insert-companies-1c.sql:3: ERROR: column reference "company_name" is ambiguous
LINE 3: ...company_name) do update set company_name = concat(company_na...
I tried fully qualifying the column names in the concat() function call,
but all that did was get me a different error message
What would be the proper format for the "on conflict" clause ?
Thanks for the response. But when I "prefixed" the columns with "excluded" I got a different error message
ERROR: there is no unique or exclusion constraint matching the ON CONFLICT specification
