Merge pull request duckdb#201 from jwills/jwills_disable_those_tests

Disable these tests on MD and add a note to the README

README.md

@@ -55,8 +55,7 @@ there are a [few differences to be aware of](https://motherduck.com/docs/archite
 1. MotherDuck databases do not suppport transactions, so there is a new `disable_transactions` profile
 option that will be automatically enabled if you are connecting to a MotherDuck database in your `path`.
 1. MotherDuck preloads a set of the most common DuckDB extensions for you, but does not support loading custom extensions or user-defined functions.
-1. A small subset of advanced SQL features are currently unsupported; the only impact of this on the dbt adapter is that the [dbt.listagg](https://docs.getdbt.com/reference/dbt-jinja-functions/cross-database-macros#listagg) macro will work against a local DuckDB database, but will
-not work against MotherDuck.
+1. A small subset of advanced SQL features are currently unsupported; the only impact of this on the dbt adapter is that the [dbt.listagg](https://docs.getdbt.com/reference/dbt-jinja-functions/cross-database-macros#listagg) macro and foreign-key constraints will work against a local DuckDB database, but will not work against a MotherDuck database.
 
 #### DuckDB Extensions, Settings, and Filesystems
 

tests/functional/adapter/test_constraints.py

@@ -59,18 +59,21 @@ class TestIncrementalConstraintsColumnsEqual(
     pass
 
 
+@pytest.mark.skip_profile("md")
 class TestTableConstraintsRuntimeDdlEnforcement(
     DuckDBColumnEqualSetup, BaseConstraintsRuntimeDdlEnforcement
 ):
     pass
 
 
+@pytest.mark.skip_profile("md")
 class TestTableConstraintsRollback(DuckDBColumnEqualSetup, BaseConstraintsRollback):
     @pytest.fixture(scope="class")
     def expected_error_messages(self):
         return ["NOT NULL constraint failed"]
 
 
+@pytest.mark.skip_profile("md")
 class TestIncrementalConstraintsRuntimeDdlEnforcement(
     DuckDBColumnEqualSetup, BaseIncrementalConstraintsRuntimeDdlEnforcement
 ):
@@ -79,6 +82,7 @@ def expected_error_messages(self):
         return ["NOT NULL constraint failed"]
 
 
+@pytest.mark.skip_profile("md")
 class TestIncrementalConstraintsRollback(
     DuckDBColumnEqualSetup, BaseIncrementalConstraintsRollback
 ):
@@ -87,6 +91,7 @@ def expected_error_messages(self):
         return ["NOT NULL constraint failed"]
 
 
+@pytest.mark.skip_profile("md")
 class TestModelConstraintsRuntimeEnforcement(
     DuckDBColumnEqualSetup, BaseModelConstraintsRuntimeEnforcement
 ):