changeset

.changeset/short-tips-poke.md

@@ -0,0 +1,17 @@
+---
+"apollo-federation-integration-testsuite": patch
+"@apollo/query-planner": patch
+"@apollo/query-graphs": patch
+"@apollo/composition": patch
+"@apollo/federation-internals": patch
+"@apollo/subgraph": patch
+"@apollo/gateway": patch
+---
+
+Bugfix: Use minimum `join` spec version in supergraphs for subgraphs using `federation` spec versions 2.0 -> 2.2.
+
+> Note: if you have at least one subgraph running `federation/v2.3` or above, this correctness fix does not affect you.
+
+Previously, `federation/v(2.0-2.2)` subgraphs would yield a supergraph with `join/v0.3`. This is incorrect and unnecessary, as only `join/v0.2` is needed (and it's what should be used).
+
+If you use Federation with subgraphs all using `federation/v2.0` -> `federation/v2.2` spec versions inclusive and you take this upgrade, you might notice your supergraph `join` spec version (correctly) drop from `v0.3` to `v0.2`.