TF SDKv2 does not support complex types under Map

[t0yv0]

Hello!

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Issue details

Per hashicorp/terraform-plugin-sdk#62 the complex types under TypeMap are not supported. If we tighten the schema validators to enforce it can help with bridge hardening. It will also help avoid issues with providers that accidentally use this feature - much more appropriate to reject this a build-time (or at least warn).

Affected area/feature

[VenelinMartinov]

Should we warn the author of the provider and match the TF behaviour?

[t0yv0]

That's the best probably.. I could be good to run a test to see how many instances of this are across our ecosystem. Rejecting it out of hand is least effort but the more "correct" thing to do would be what TF does and treat these as map of strings.