Ok, thanks.
I was looking for, but didn't find, something like... each_element_of(regexp_split_to_array(children_csv)) references projects(project);
Of course the "each_element_of" is my creation here :-)
On Tue, Jul 13, 2021 at 10:07 AM David G. Johnston <david.g.johnston@xxxxxxxxx> wrote:
On Tuesday, July 13, 2021, David Gauthier <davegauthierpg@xxxxxxxxx> wrote:I suppose I could write a stored procedure to do this and call it in a check constraint. But I was wondering if there is something more elegant.You cannot use a check constraint here as the behavior is not immutable. You can use a trigger function though. Or normalize the table and use the built-it foreign key triggers.David J.
