constraint definition on an array column?

["Gauthier, Dave" <dave.gauthier@xxxxxxxxx>]

Hi:

 

Is it possible to define a constraint that checks all elements of an array type column?

Example...

 

create table foo (asset text, owner_uids text[]);

 

I also have a  plperlu function that checks to see if a given uid is valid (returns a 0/1).  It’s called validate_uid(text),  This function could be modified to handle a list of uids if that was needed.

 

I want something like...

 

constraint validate_all_owner_uids check (select validate_uid(owner_uid) = 1)

 

...but owner_uid is an array, not any one distinct value. 

 

1)     Is there a way to pass in a list for the plperlu to evaluate (return 0 if any uid is invalid)?

2)     Is there some sort of syntactical support for defining constraints on array columns?

 

Thanks in Advance!