Hello !
I am trying to run this query in psql:
update clin.episode
set fk_patient = clin.health_issue.fk_patient
from clin.health_issue
where
clin.episode.fk_patient is NULL and
clin.episode.fk_health_issue = clin.health_issue.pk;
It returns "UPDATE 2" which is what I expect from the data.
However, the rows in question are not actually updated.
What I am trying to do:
- clin.episode has a nullable foreign key fk_health_issue to
clin.health_issue.pk
- clin.health_issue has a not-nullable fk_patient
- clin.episode also has an fk_patient which is nullable
I want to transfer the value of clin.health_issue.fk_patient
to clin.episode.fk_patient to those clin.episodes for which
fk_patient is NULL.
I'm sure I am doing something wrong in a fairly basic way.
I tried with a subselect, too, but get the same result:
update clin.episode
set fk_patient = (
select fk_patient from clin.health_issue chi where
chi.pk=clin.episode.fk_health_issue
)
where fk_patient is NULL;
This is on 7.4.14 on Debian/Etch.
Thanks,
Karsten
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