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constrains of array

From: Alexander Klimov <ask(at)wisdom(dot)weizmann(dot)ac(dot)il>
To: pgsql-bugs(at)postgresql(dot)org
Subject: constrains of array
Date: 2000-12-07 10:42:16
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-bugs

I use version from cvs.

I want to have array of referencies to another table, so I do:
cms=# create table a (a int primary key); create table b (b int[]
references a);
NOTICE:  CREATE TABLE/PRIMARY KEY will create implicit index 'a_pkey' for
table 'a'
NOTICE:  CREATE TABLE will create implicit trigger(s) for FOREIGN KEY

But now I can't add anything to table b:
cms=# insert into a values (1);              
INSERT 52069 1
cms=# insert into b values ('{1}');
ERROR:  Unable to identify an operator '=' for types 'int4' and '_int4'
        You will have to retype this query using an explicit cast

I expect either of following:
1) REFERENCIES from array to scalar should create correct trigger (check
every entity of array)
2) It should be error in *creation* of table if there is no comparasion
operator for constrain check
3) Error in insert should say something about trigger, otherwise user have
to guess what is wrong with his query. 



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