Finish off upivot boolean logic

Author: clrcrl

integration_tests/data/cross_db/data_cast_bool_to_text

@@ -0,0 +1,4 @@
+id,my_bool
+1,true
+2,false
+3,

integration_tests/data/sql/data_unpivot_bool.csv

@@ -1,4 +1,4 @@
 customer_id,created_at,status,segment,is_updated
 123,2017-01-01,active,tier 1,TRUE
 234,2017-02-01,active,tier 3,FALSE
-567,2017-03-01,churned,tier 2,TRUE
+567,2017-03-01,churned,tier 2,

integration_tests/data/sql/data_unpivot_bool_expected.csv

@@ -1,10 +1,10 @@
 customer_id,created_at,prop,val
-123,"2017-01-01","segment","tier 1"
-123,"2017-01-01","status","active"
-123,"2017-01-01","is_updated","true"
-234,"2017-02-01","segment","tier 3"
-234,"2017-02-01","status","active"
-234,"2017-02-01","is_updated","false"
-567,"2017-03-01","status","churned"
-567,"2017-03-01","is_updated","true"
-567,"2017-03-01","segment","tier 2"
+123,2017-01-01,segment,tier 1
+123,2017-01-01,status,active
+123,2017-01-01,is_updated,true
+234,2017-02-01,segment,tier 3
+234,2017-02-01,status,active
+234,2017-02-01,is_updated,false
+567,2017-03-01,status,churned
+567,2017-03-01,is_updated,
+567,2017-03-01,segment,tier 2

macros/cross_db_utils/cast_bool_to_text.sql

@@ -0,0 +1,15 @@
+{% macro cast_bool_to_text(field) %}
+  {{ adapter.dispatch('cast_bool_to_text', packages = dbt_utils._get_utils_namespaces()) (field) }}
+{% endmacro %}
+
+
+{% macro default__cast_bool_to_text(field) %}
+    cast({{ col }} as {{ type }})
+{% endmacro %}
+
+{% macro redshift__cast_bool_to_text(field) %}
+    case
+        when {{ field }} is true then 'true'
+        when {{ field }} is false then 'false'
+    end::text
+{% endmacro %}

macros/sql/unpivot.sql

@@ -59,7 +59,7 @@ Arguments:
 
       cast('{{ col.column }}' as {{ dbt_utils.type_string() }}) as {{ field_name }},
       cast(  {% if col.data_type == 'boolean' %}
-           case when {{ col.column }} then 'true' else 'false' end
+           {{ dbt_utils.cast_bool_to_text(col.column) }}
              {% else %}
            {{ col.column }}
              {% endif %}