Fix including missing columns on columns with reserved names

integration-tests/tests/unit/reserved_column_names_mocking.sql

@@ -5,11 +5,22 @@
 }}
 
 {% call dbt_unit_testing.test('model_references_model_with_reserved_column_name', 'sample test') %}
-  {% call dbt_unit_testing.mock_ref ('model_with_reserved_column_name') %}
+  {% call dbt_unit_testing.mock_ref ('model_with_reserved_column_name', options={"include_missing_columns": true}) %}
     select 1 as a, 'b' as b, 1 as "END"
   {% endcall %}
   {% call dbt_unit_testing.expect() %}
     select 1 as a, 'b' as b, 1 as "END"
   {% endcall %}
 {% endcall %}
+
+ UNION ALL
+
+ {% call dbt_unit_testing.test('model_references_model_with_reserved_column_name', 'sample test') %}
+  {% call dbt_unit_testing.mock_ref ('model_with_reserved_column_name', options={"include_missing_columns": true}) %}
+    select 1 as a, 'b' as b
+  {% endcall %}
+  {% call dbt_unit_testing.expect() %}
+    select 1 as a, 'b' as b
+  {% endcall %}
+{% endcall %}
 

macros/mock_builders.sql

@@ -83,7 +83,7 @@
     {% set input_values_sql %}
       {% set node_sql = dbt_unit_testing.build_node_sql(model_node, options.use_database_models) %}
         select * from ({{ input_values_sql }}) as m1
-        left join (select {{ missing_columns | join (",")}}
+        left join (select {{ dbt_unit_testing.quote_and_join_columns(missing_columns)}}
                   from ({{ node_sql }}) as m2) as m3 on false
     {%- endset -%}
   {%- endif -%}

macros/utils.sql

@@ -19,7 +19,7 @@
 {% endmacro %}
 
 {% macro extract_columns_difference(cl1, cl2) %}
-  {% set columns = cl1 | map('lower') | list | reject('in', cl2 | map('lower') | list) | list %}
+  {% set columns = cl1 | reject('in', cl2) | list %}
   {{ return(columns) }}
 {% endmacro %}