Feat: add macro get_query_results_as_single_value

integration_tests/data/sql/data_get_single_column_row_value.csv

@@ -0,0 +1,2 @@
+date,float,int,string
+9/30/2022,3.3,19,coalesce

integration_tests/models/sql/schema.yml

@@ -1,6 +1,32 @@
 version: 2
 
 models:
+  - name: test_get_query_results_as_single_value
+    columns:
+      - name: date_value
+        tests:
+          - accepted_values:
+              values:
+                - '9/30/2022'
+
+      - name: float_value
+        tests:
+          - accepted_values:
+              values:
+                - '3.3'
+
+      - name: integer_value
+        tests:
+          - accepted_values:
+              values:
+                - '19'
+
+      - name: string_value
+        tests:
+          - accepted_values:
+              values:
+                - 'coalesce'
+
   - name: test_generate_series
     tests:
       - dbt_utils.equality:

integration_tests/models/sql/test_get_query_results_as_single_value.sql

@@ -0,0 +1,15 @@
+{%- set default_ref = ref('data_get_single_column_row_value')|string -%}
+
+with default_data as (
+
+    select 
+        {{ dbt_utils.get_query_results_as_single_value('select * from '+ default_ref,0,0) }} as date_value,
+        {{ dbt_utils.get_query_results_as_single_value('select * from '+ default_ref,0,1) }} as float_value,
+        {{ dbt_utils.get_query_results_as_single_value('select * from '+ default_ref,0,2) }} as integer_value,
+        {{ dbt_utils.get_query_results_as_single_value('select * from '+ default_ref,0,3) }} as string_value
+    from {{ ref('data_get_single_column_row_value') }}
+
+)
+
+select * 
+from default_data

macros/sql/get_query_results_as_single_value.sql

@@ -0,0 +1,29 @@
+{% macro get_query_results_as_single_value(query, row_position=0, column_position=0) %}
+    {{ return(adapter.dispatch('get_query_results_as_single_value', 'dbt_utils')(query, row_position, column_position)) }}
+{% endmacro %}
+
+{% macro default__get_query_results_as_single_value(query, row_position=0, column_position=0) %}
+
+{# This macro returns the (row_position, column_position) record in a query as a string #}
+    {%- set nth_row = row_position -%}
+    {%- set nth_column = column_position -%}
+
+    {%- call statement('get_query_result', fetch_result=True,auto_begin=false) -%}
+
+        {{ query }}
+
+    {%- endcall -%}
+
+    {%- if execute -%}
+
+        {% set sql_result = load_result('get_query_result').table.columns[nth_column].values()[nth_row]|string %}
+
+    {%- else -%}
+
+        {% set sql_result = "" %}
+
+    {%- endif -%}
+
+    {{ return("CAST('"+sql_result+"' AS "+dbt.type_string()+")") }}
+
+{% endmacro %}