On 9/24/25 16:03, Adrian Klaver wrote:
On 9/24/25 10:02, Samuel Marks wrote:
On Wed, Sep 24, 2025 at 10:13 AM Adrian Klaver
I don't have enough experience with below to come up with an off the top
of my head examples, but they look like they may offer alternatives.
MERGE:
https://www.postgresql.org/docs/current/sql-merge.html
First time working with MERGE, so approach the below with caution:
CREATE TABLE org
(
"name" VARCHAR(50) PRIMARY KEY,
owner VARCHAR(50) NOT NULL
);
CREATE TABLE repo
(
"id" INTEGER PRIMARY KEY,
full_name VARCHAR(255) UNIQUE NOT NULL,
org VARCHAR(50) NOT NULL REFERENCES org ("name")
);
INSERT INTO org(name, owner) VALUES ('org0', 'user0');
WITH t AS (SELECT
*
FROM
org
RIGHT JOIN
(values(0 , 'org0/name0 by wrong user', 'org0', 'wrong_user'))
AS v(id, full_name, org, user_name)
ON
org.name = v.org
AND
org.owner = v.user_name
)
MERGE INTO repo as r
USING t
ON
r.org = t.name
WHEN MATCHED AND t.id = r.id THEN
UPDATE SET (id, full_name, org) = (t.id, t.full_name, t.org)
WHEN NOT MATCHED AND t.user_name = COALESCE(t.owner, '') THEN
INSERT VALUES(t.id, t.full_name, t.org)
RETURNING r.*;
id | full_name | org
----+-----------+-----
(0 rows)
MERGE 0
select * from repo ;
id | full_name | org
----+-----------+-----
WITH t AS (SELECT
*
FROM
org
RIGHT JOIN
(values(0 , 'org0/name0 by right user', 'org0', 'user0'))
AS v(id, full_name, org, user_name)
ON
org.name = v.org
AND
org.owner = v.user_name
)
MERGE INTO repo as r
USING t
ON
r.org = t.name
WHEN MATCHED AND t.id = r.id THEN
UPDATE SET (id, full_name, org) = (t.id, t.full_name, t.org)
WHEN NOT MATCHED AND t.user_name = COALESCE(t.owner, '') THEN
INSERT VALUES(t.id, t.full_name, t.org)
RETURNING r.*;
id | full_name | org
----+--------------------------+------
0 | org0/name0 by right user | org0
(1 row)
MERGE 1
select * from repo ;
id | full_name | org
----+--------------------------+------
0 | org0/name0 by right user | org0
WITH t AS (SELECT
*
FROM
org
RIGHT JOIN
(values(0 , 'org0/name0 by right user update', 'org0', 'user0'))
AS v(id, full_name, org, user_name)
ON
org.name = v.org
AND
org.owner = v.user_name
)
MERGE INTO repo as r
USING t
ON
r.org = t.name
WHEN MATCHED AND t.id = r.id THEN
UPDATE SET (id, full_name, org) = (t.id, t.full_name, t.org)
WHEN NOT MATCHED AND t.user_name = COALESCE(t.owner, '') THEN
INSERT VALUES(t.id, t.full_name, t.org)
RETURNING r.*;
id | full_name | org
----+---------------------------------+------
0 | org0/name0 by right user update | org0
(1 row)
select * from repo ;
id | full_name | org
----+---------------------------------+------
0 | org0/name0 by right user update | org0
(1 row)
--
Adrian Klaver
[email protected]
