Fix #8031: Call materialization macro from adapter dispatch

.changes/unreleased/Fixes-20230810-183216.yaml

@@ -0,0 +1,6 @@
+kind: Fixes
+body: Call materialization macro from adapter dispatch
+time: 2023-08-10T18:32:16.226142+01:00
+custom:
+  Author: aranke
+  Issue: "8031"

core/dbt/context/providers.py

@@ -179,7 +179,11 @@ def dispatch(
 
         for package_name in search_packages:
             for prefix in self._get_adapter_macro_prefixes():
-                search_name = f"{prefix}__{macro_name}"
+                search_name = (
+                    macro_name
+                    if macro_name.startswith("materialization_")
+                    else f"{prefix}__{macro_name}"
+                )
                 try:
                     # this uses the namespace from the context
                     macro = self._namespace.get_from_package(package_name, search_name)

core/dbt/task/clone.py

@@ -2,7 +2,6 @@
 from typing import AbstractSet, Any, List, Iterable, Set
 
 from dbt.adapters.base import BaseRelation
-from dbt.clients.jinja import MacroGenerator
 from dbt.context.providers import generate_runtime_model_context
 from dbt.contracts.results import RunStatus, RunResult
 from dbt.dataclass_schema import dbtClassMixin
@@ -80,7 +79,7 @@ def execute(self, model, manifest):
 
         hook_ctx = self.adapter.pre_model_hook(context_config)
         try:
-            result = MacroGenerator(materialization_macro, context)()
+            result = context["adapter"].dispatch(materialization_macro.name)()
         finally:
             self.adapter.post_model_hook(context_config, hook_ctx)