Initial work on contract constraints

Initial work on dbt constraints using contracts. Items to note:
* contracts do not appear to be enforced if model schema.yml is namespaced with dbt_business_intelligence
* main fix here is addition of fabric__table_columns_and_constraints macro, which is a redirect to get around this issue: dbt-msft/dbt-sqlserver#494

Author: ataft

dbt_project.yml

@@ -55,18 +55,13 @@ models:
     +schema: observability
     sources:
       +enabled: false
-  +grants:
-    select: ['business_analyst_role']
 
 seeds:
   dbt_business_intelligence:
     schema: staging # all seeds in this project will use the mapping schema by default
 
 dispatch:
   - macro_namespace: dbt_utils
-    search_order: ['tsql_utils', 'dbt_utils']
+    search_order: ['dbt_business_intelligence', 'tsql_utils', 'dbt_utils']
   - macro_namespace: dbt_date
-    search_order: ['tsql_utils', 'dbt_date']
-
-on-run-end:
-  - "{{ dbt_observability.upload_results(results) }}"
+    search_order: ['dbt_business_intelligence', 'tsql_utils', 'dbt_date']

macros/fabric__table_columns_and_constraints.sql

@@ -0,0 +1,4 @@
+{% macro fabric__table_columns_and_constraints(relation) -%}
+    {%- do log("REDIRECT!!!: " ~ relation, info=true) -%}
+    {{ fabric__build_columns_constraints(relation) }}
+{% endmacro %}

macros/generate_surrogate_key.sql

@@ -0,0 +1,29 @@
+{%- macro sqlserver__generate_surrogate_key(field_list) -%}
+
+{%- if var('surrogate_key_treat_nulls_as_empty_strings', False) -%}
+    {%- set default_null_value = "" -%}
+{%- else -%}
+    {%- set default_null_value = '_dbt_utils_surrogate_key_null_' -%}
+{%- endif -%}
+
+{%- set fields = [] -%}
+
+{%- for field in field_list -%}
+
+    {%- do fields.append(
+        "coalesce(cast(" ~ field ~ " as " ~ dbt.type_string() ~ "), '" ~ default_null_value  ~"')"
+    ) -%}
+
+    {%- if not loop.last %}
+        {%- do fields.append("'-'") -%}
+    {%- endif -%}
+
+{%- endfor -%}
+
+{%- if fields|length > 1 %}
+    {{ dbt.hash(dbt.concat(fields)) }}
+{%- else -%}
+    {{ dbt.hash(fields[0]) }}
+{%- endif -%}
+
+{%- endmacro -%}