Adds test for column presence

README.md

@@ -73,6 +73,7 @@ To run the tests:
 - [expect_table_column_count_to_be_between](#expect_table_column_count_to_be_between)
 - [expect_table_column_count_to_equal_other_table](#expect_table_column_count_to_equal_other_table)
 - [expect_table_column_count_to_equal](#expect_table_column_count_to_equal)
+- [expect_table_columns_to_not_contain_set](#expect_table_columns_to_not_contain_set)
 - [expect_table_columns_to_contain_set](#expect_table_columns_to_contain_set)
 - [expect_table_columns_to_match_ordered_list](#expect_table_columns_to_match_ordered_list)
 - [expect_table_columns_to_match_set](#expect_table_columns_to_match_set)
@@ -225,6 +226,20 @@ models: # or seeds:
  compare_model: ref("other_model")
 ```
 
+### [expect_table_columns_to_not_contain_set](macros/schema_tests/table_shape/expect_table_columns_to_not_contain_set.sql)
+
+Expect the columns in a model not to contain a given list.
+
+*Applies to:* Model, Seed, Source
+
+```yaml
+models: # or seeds:
+ - name: my_model
+ tests:
+ - dbt_expectations.expect_table_columns_to_not_contain_set:
+ column_list: ["col_a", "col_b"]
+ transform: uppper # (Optional)
+```
 ### [expect_table_columns_to_contain_set](macros/schema_tests/table_shape/expect_table_columns_to_contain_set.sql)
 
 Expect the columns in a model to contain a given list.

integration_tests/models/schema_tests/schema.yml

@@ -166,6 +166,8 @@ models:
  column_list: ["idx", "date_col", "col_numeric_a", "col_numeric_b", "col_string_a", "col_string_b", "col_null"]
  - dbt_expectations.expect_table_column_count_to_equal_other_table:
  compare_model: ref("data_test")
+ - dbt_expectations.expect_table_columns_to_not_contain_set:
+ column_list: ["col_numeric_b", "col_string_a"]
  - dbt_expectations.expression_is_true:
  expression: (col_numeric_a + col_numeric_b = 1)
  - dbt_expectations.equal_expression:

macros/schema_tests/table_shape/expect_table_columns_to_not_contain_set.sql

@@ -0,0 +1,28 @@
+{%- test expect_table_columns_to_not_contain_set(model, column_list, transform="upper") -%}
+{%- if execute -%}
+ {%- set column_list = column_list | map(transform) | list -%}
+ {%- set relation_column_names = dbt_expectations._get_column_list(model, transform) -%}
+ {%- set matching_columns = dbt_expectations._list_intersect(column_list, relation_column_names) -%}
+ with relation_columns as (
+
+ {% for col_name in relation_column_names %}
+ select cast('{{ col_name }}' as {{ dbt_utils.type_string() }}) as relation_column
+ {% if not loop.last %}union all{% endif %}
+ {% endfor %}
+ ),
+ input_columns as (
+
+ {% for col_name in column_list %}
+ select cast('{{ col_name }}' as {{ dbt_utils.type_string() }}) as input_column
+ {% if not loop.last %}union all{% endif %}
+ {% endfor %}
+ )
+ -- catch any column in input list that is in the list of table columns
+ select *
+ from
+ input_columns i
+ inner join
+ relation_columns r on r.relation_column = i.input_column
+
+{%- endif -%}
+{%- endtest -%}