From 70985c747d80a9ebfb48bceea7ad8369dae34e80 Mon Sep 17 00:00:00 2001
From: TangoEnSkai <21152231+TangoEnSkai@users.noreply.github.com>
Date: Sun, 23 Aug 2026 17:07:12 +0900
Subject: [PATCH 1/2] fix: handle grant column names case-insensitively

Signed-off-by: TangoEnSkai <21152231+TangoEnSkai@users.noreply.github.com>
---
 dbt/adapters/databricks/impl.py | 14 ++++++++++++++
 tests/unit/test_adapter.py      | 24 ++++++++++++++++++++++++
 2 files changed, 38 insertions(+)

diff --git a/dbt/adapters/databricks/impl.py b/dbt/adapters/databricks/impl.py
index 6640f0d76..8b6f9e4ba 100644
--- a/dbt/adapters/databricks/impl.py
+++ b/dbt/adapters/databricks/impl.py
@@ -317,6 +317,20 @@ def _has_dbr_capability_parse(self, capability_name: str) -> bool:
     def _v2_to_v1_type(self, catalog_type: str) -> str:
         return self._V2_TO_V1_TYPE.get(catalog_type, catalog_type)
 
+    def standardize_grants_dict(self, grants_table: "Table") -> dict[str, list[str]]:
+        column_names = {name.lower(): name for name in grants_table.column_names}
+        grants_dict: dict[str, list[str]] = {}
+
+        for row in grants_table:
+            grantee = row[column_names["principal"]]
+            privilege = row[column_names["actiontype"]]
+            object_type = row[column_names["objecttype"]]
+
+            if object_type == "TABLE" and privilege != "OWN":
+                grants_dict.setdefault(privilege, []).append(grantee)
+
+        return grants_dict
+
     @property
     def _behavior_flags(self) -> list[BehaviorFlag]:
         return [
diff --git a/tests/unit/test_adapter.py b/tests/unit/test_adapter.py
index 92520bca8..2f55b996d 100644
--- a/tests/unit/test_adapter.py
+++ b/tests/unit/test_adapter.py
@@ -135,6 +135,30 @@ def _stub_spog_probe(self):
         ):
             yield
 
+    @pytest.mark.parametrize(
+        "column_names",
+        [
+            ["Principal", "ActionType", "ObjectType", "ObjectKey"],
+            ["principal", "actiontype", "objecttype", "objectkey"],
+            ["principal", "actionType", "objectType", "objectKey"],
+        ],
+    )
+    def test_standardize_grants_dict_ignores_column_name_case(self, column_names):
+        grants_table = agate.Table(
+            [
+                ["analysts", "SELECT", "TABLE", "catalog.schema.model"],
+                ["engineers", "SELECT", "TABLE", "catalog.schema.model"],
+                ["owner", "OWN", "TABLE", "catalog.schema.model"],
+                ["catalog_user", "USE CATALOG", "CATALOG", "catalog"],
+            ],
+            column_names=column_names,
+        )
+        adapter = DatabricksAdapter(self._get_config(), get_context("spawn"))
+
+        assert adapter.standardize_grants_dict(grants_table) == {
+            "SELECT": ["analysts", "engineers"]
+        }
+
     def test_two_catalog_settings(self):
         with pytest.raises(DbtConfigError) as excinfo:
             self._get_config(

From ecd3747b4c5603dbc9cdc7481f9610cf8e9c5b51 Mon Sep 17 00:00:00 2001
From: TangoEnSkai <21152231+TangoEnSkai@users.noreply.github.com>
Date: Sun, 23 Aug 2026 17:09:07 +0900
Subject: [PATCH 2/2] chore: update changelog for #1650

Signed-off-by: TangoEnSkai <21152231+TangoEnSkai@users.noreply.github.com>
---
 CHANGELOG.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4a0380734..40d0d6330 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,7 @@
 
 ### Fixes
 
+- Handle `SHOW GRANTS` result columns case-insensitively so grant reconciliation does not crash when connectors return lowercase names (thanks @TangoEnSkai!) ([#1650](https://github.com/databricks/dbt-databricks/pull/1650) resolves [#782](https://github.com/databricks/dbt-databricks/issues/782))
 - Replace an existing table or view with a metric view using backup-and-create instead of `CREATE OR REPLACE VIEW ... WITH METRICS` ([#1640](https://github.com/databricks/dbt-databricks/pull/1640) resolves [#1639](https://github.com/databricks/dbt-databricks/issues/1639))
 - Interpolate lazily-formatted `databricks.sql` log records when mirroring them into dbt logs ([#1642](https://github.com/databricks/dbt-databricks/pull/1642) resolves [#1637](https://github.com/databricks/dbt-databricks/issues/1637))