Comments on: PostgreSQL 9.5: Insert IF not Exists, Update IF Exists (Insert ON CONFLICT option)

By: Bea

Bea — Thu, 10 Jan 2019 06:35:49 +0000

Thanks!

By: Muhammad Waqas

Muhammad Waqas — Wed, 09 Jan 2019 15:55:22 +0000

@OmarBenSalem
In my case it’s working all fine. I ‘m using 2 tables, “customer_stage” as source and “customer” as target. “customer_stage” table has 6 rows and “customer” table is empty initially. After executing following statement all the 6 records from “customer_stage” are inserted to “customer” table:

INSERT INTO customer (cust_id, name, address)
SELECT cust_id, name, address
FROM customer_stage
ON CONFLICT (cust_id) DO UPDATE
SET address = excluded.address;

As your comment is too much old and I’ve tried it today, there are chances that ON CONFLICT clause might have got some improvements.

By: Muhammad Waqas

Muhammad Waqas — Wed, 09 Jan 2019 15:53:23 +0000

In reply to OmarBenSalem. In my case it's working all fine. I 'm using 2 tables, "customer_stage" as source and "customer" as target. "customer_stage" table has 6 rows and "customer" table is empty initially. After executing following statement all the 6 records from "customer_stage" are inserted to "customer" table: INSERT INTO customer (cust_id, name, address) SELECT cust_id, name, address FROM customer_stage ON CONFLICT (cust_id) DO UPDATE SET address = excluded.address; As your comment is too much old and I've tried it today, there are chances that ON CONFLICT clause might have got some improvements.

By: Martín Calvo

Martín Calvo — Wed, 31 Oct 2018 17:25:57 +0000

Great tip… Thanks a lot!
Worked smoothly for me!

By: Anvesh Patel

Anvesh Patel — Mon, 23 Oct 2017 19:18:16 +0000

In reply to OmarBenSalem. This trick is for existing data check, for the empty table you can execute simple INSERT and next time you can use this trick. I will also check one more time and will try to find other solution.

By: OmarBenSalem

OmarBenSalem — Mon, 23 Oct 2017 08:48:20 +0000

What I don’t understand is when I use this:
BEGIN

INSERT INTO alerts VALUES (alertname,desk,creationdate)

ON CONFLICT (alertname)
DO UPDATE SET desk = alerts.desk;

END;

and that my table is empty, nothing happens, but when there are some values within the table, this does the trick.
The question is, how to do insert if there is no value in the table and update if there is a conflit
Thanks!