Constraint exclusion and overlapping range checks

If I have a partitioned table that has some range constraints that look kinda like they're intended for constraint
exclusion,but aren't quite non-overlapping, will that break anything? 

e.g.

  create table jan ( …, check(created >= '2013-01-01' and created < '2013-02-01'), check(id >=0 and id < 10000100) )
inherits(foo);
  create table feb ( …, check(created >= '2013-02-01' and created < '2013-03-01'), check(id >=1000000 and id <
20000100)) inherits(foo); 
  create table mar ( …, check(created >= '2013-03-01' and created < '2013-04-01'), check(id >=2000000 and id <
30000100)) inherits(foo); 

Querying by created should be fine, and take advantage of constraint exclusion, but will querying by id work? And if it
doeswork, will it take any advantage of those constraints at all, or just search all the child partitions? 

Cheers,
  Steve