fix: quote catalog names in SHOW SCHEMAS commands (#1325) (#1332)

resolves #1325

### Description

when a unity catalog name contains hyphens or other special characters
(e.g., `data_engineering-uc-dev`), `SHOW SCHEMAS` commands fail with
`INVALID_IDENTIFIER` because the catalog name is not quoted.

**fix:** added backtick quoting around `{{ database }}` in the
`list_schemas_sql` and `check_schema_exists_sql` macros in
`metadata.sql`.

**before:**
```sql
SHOW SCHEMAS IN data_engineering-uc-dev
```

**after:**
```sql
SHOW SCHEMAS IN `data_engineering-uc-dev`
```

added 4 unit tests covering normal, hyphenated, and null database names
for both macros.

### Checklist

- [x] I have run this code in development and it appears to resolve the
stated issue
- [x] This PR includes tests, or tests are not required/relevant for
this PR
- [x] I have updated the `CHANGELOG.md` and added information about my
change to the "dbt-databricks next" section.

---------

Signed-off-by: aarushisingh04 <aarushi07.singh@gmail.com>
Co-authored-by: Shubham Dhal <shubham.dhal@databricks.com>

Author: aarushisingh04

CHANGELOG.md

@@ -6,6 +6,10 @@
   gated behind the `use_concurrent_microbatch` behavior flag (default: `false`).
   Opt in via `flags: {use_concurrent_microbatch: true}` in `dbt_project.yml`
   ([#914](https://github.com/databricks/dbt-databricks/issues/914))
+  
+### Fixes
+
+- Fix catalog names with special characters (e.g., hyphens) not being quoted in `SHOW SCHEMAS` commands, causing `INVALID_IDENTIFIER` errors ([#1325](https://github.com/databricks/dbt-databricks/issues/1325))
 
 ## dbt-databricks 1.11.5 (Feb 19, 2026)
 

dbt/include/databricks/macros/adapters/metadata.sql

@@ -33,7 +33,7 @@ SHOW TABLES IN {{ relation.render() }}
 
 {% macro list_schemas_sql(database) %}
 {% if database %}
-  SHOW SCHEMAS IN {{ database }}
+  SHOW SCHEMAS IN {{ adapter.quote(database) }}
 {% else %}
   SHOW SCHEMAS
 {% endif %}
@@ -44,7 +44,7 @@ SHOW TABLES IN {{ relation.render() }}
 {% endmacro %}
 
 {% macro check_schema_exists_sql(database, schema) %}
-  SHOW SCHEMAS IN {{ database }} LIKE '{{ schema }}'
+  SHOW SCHEMAS IN {{ adapter.quote(database) }} LIKE '{{ schema }}'
 {% endmacro %}
 
 {% macro show_views(relation) %}

tests/unit/macros/adapters/test_metadata_macros.py

@@ -166,6 +166,37 @@ def test_get_uc_tables_sql_without_identifier(self, template_bundle, mock_schema
         """  # noqa
         self.assert_sql_equal(result, expected_sql)
 
+    def test_list_schemas_sql_with_database(self, template_bundle):
+        result = self.run_macro(template_bundle.template, "list_schemas_sql", "my_catalog")
+
+        expected_sql = "SHOW SCHEMAS IN `my_catalog`"
+        self.assert_sql_equal(result, expected_sql)
+
+    def test_list_schemas_sql_with_hyphenated_database(self, template_bundle):
+        result = self.run_macro(
+            template_bundle.template, "list_schemas_sql", "data_engineering-uc-dev"
+        )
+
+        expected_sql = "SHOW SCHEMAS IN `data_engineering-uc-dev`"
+        self.assert_sql_equal(result, expected_sql)
+
+    def test_list_schemas_sql_without_database(self, template_bundle):
+        result = self.run_macro(template_bundle.template, "list_schemas_sql", None)
+
+        expected_sql = "SHOW SCHEMAS"
+        self.assert_sql_equal(result, expected_sql)
+
+    def test_check_schema_exists_sql_with_hyphenated_database(self, template_bundle):
+        result = self.run_macro(
+            template_bundle.template,
+            "check_schema_exists_sql",
+            "data_engineering-uc-dev",
+            "my_schema",
+        )
+
+        expected_sql = "SHOW SCHEMAS IN `data_engineering-uc-dev` LIKE 'my_schema'"
+        self.assert_sql_equal(result, expected_sql)
+
     def test_case_sensitivity(self, template_bundle):
         relation = Mock()
         relation.database = "TEST_DB"