Merged PR 2039: Simple rates

- Creates a simplified rates model that hides some of the complexities of the full blown exchange rates model.

Related work items: #17212

models/intermediate/cross/int_simple_exchange_rates.sql

@@ -0,0 +1,7 @@
+with
+    int_daily_currency_exchange_rates as (
+        select * from {{ ref("int_daily_currency_exchange_rates") }}
+    )
+select er.from_currency, er.to_currency, er.rate, er.rate_date_utc, er.updated_at_utc
+from int_daily_currency_exchange_rates er
+where er.source = 'xedotcom' or er.source = 'xe_inferred'

models/intermediate/cross/schema.yml

@@ -61,11 +61,13 @@ models:
           - not_null
       - name: source
         data_type: text
-        description: Where is the data coming from. Records that are composed from
+        description:
+          Where is the data coming from. Records that are composed from
           making assumptions on real data will contain `_inferred`.
       - name: rate_version
         data_type: text
-        description: The version of the rate. This can be one of `actual` (the rate is a
+        description:
+          The version of the rate. This can be one of `actual` (the rate is a
           reality fact), `forecast` (the rate sits in the future and is a guess
           in nature) or `guess` (the rate sits in the past and is a guess in
           nature). Note that one currency pair can have multiple rate versions
@@ -79,7 +81,52 @@ models:
           - not_null
       - name: updated_at_utc
         data_type: timestamp with time zone
-        description: For external sources, this will be the point in time when the
+        description:
+          For external sources, this will be the point in time when the
+          information was obtained from them. For stuff we make up here in the
+          DWH, this will be the point in time when we made the assumption.
+        tests:
+          - not_null
+  - name: int_simple_exchange_rates
+    description: >-
+      A simplified vision of exchange rates, derived from
+      `int_daily_currency_exchange_rates`. Come here if you don't want to
+      understand nuances and complexities and just want to convert rates.
+
+      The time granularity is daily. Each record holds a currency pair for a
+      specific day. You will only find one conversion rate per currency pair and
+      date.
+    tests:
+      - dbt_utils.unique_combination_of_columns:
+          combination_of_columns:
+            - from_currency
+            - to_currency
+            - rate_date_utc
+    columns:
+      - name: from_currency
+        data_type: character
+        description: The source currency, represented as an ISO 4217 code.
+        tests:
+          - not_null
+      - name: to_currency
+        data_type: character
+        description: The source currency, represented as an ISO 4217 code.
+        tests:
+          - not_null
+      - name: rate
+        data_type: numeric
+        description: The target currency, represented as an ISO 4217 code.
+        tests:
+          - not_null
+      - name: rate_date_utc
+        data_type: date
+        description: The date in which the rate record is relevant.
+        tests:
+          - not_null
+      - name: updated_at_utc
+        data_type: timestamp with time zone
+        description:
+          For external sources, this will be the point in time when the
           information was obtained from them. For stuff we make up here in the
           DWH, this will be the point in time when we made the assumption.
         tests:

packages.yml

@@ -3,3 +3,5 @@ packages:
     version: 0.12.1
   - package: calogica/dbt_expectations
     version: [">=0.9.0", "<0.10.0"]
+  - package: dbt-labs/dbt_utils
+    version: 1.2.0