Something like this might work... Select to_way from relation_members_way where to_way not in (select to_way from ways); Romulo Stefan de Konink wrote:
Hi,
I cannot find it back in the trackers but I think it have asked this question before.
Would it be possible to output the actual failing constraint details instead of 'just an error'.
sql>alter table relation_members_way add constraint relation_to_way_fkey foreign key(to_way) references ways; !SQLException:assert:INSERT INTO: FOREIGN KEY constraint 'relation_members_way.relation_to_way_fkey' violated
Inserting with INSERTS will give a nice error, because the query it self contains the problem. This is not true for a copy into, or in this respect just an alter table.
Stefan
ps. indeed I have to think too long about a query that will show me the non existing primary keys.
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