Adap 821/support for redshift 821 (#270)

Co-authored-by: Mila Page <[email protected]>

dbt/include/global_project/macros/unit_test_sql/get_fixture_sql.sql

@@ -22,6 +22,7 @@
     {%- do default_row.update({column_name: (safe_cast("null", column_type) | trim )}) -%}
 {%- endfor -%}
 
+{{ validate_fixture_rows(rows, row_number) }}
 
 {%- for row in rows -%}
 {%-   set formatted_row = format_row(row, column_name_to_data_types) -%}
@@ -93,3 +94,11 @@ union all
     {%- endfor -%}
     {{ return(formatted_row) }}
 {%- endmacro -%}
+
+{%- macro validate_fixture_rows(rows, row_number) -%}
+  {{ return(adapter.dispatch('validate_fixture_rows', 'dbt')(rows, row_number)) }}
+{%- endmacro -%}
+
+{%- macro default__validate_fixture_rows(rows, row_number) -%}
+  {# This is an abstract method for adapter overrides as needed #}
+{%- endmacro -%}