dbt-labs · peterallenwebb · Nov 22, 2024
@@ -0,0 +1,85 @@
+create table {database}.{schema}.seed (
+	id INTEGER,
+	first_name VARCHAR(50),
+	last_name VARCHAR(50),
+	email VARCHAR(50),
+	gender VARCHAR(50),
+	ip_address VARCHAR(20),
+	updated_at TIMESTAMP WITHOUT TIME ZONE
+);
+
+create table {database}.{schema}.snapshot_expected (
+	id INTEGER,
+	first_name VARCHAR(50),
+	last_name VARCHAR(50),
+	email VARCHAR(50),
+	gender VARCHAR(50),
+	ip_address VARCHAR(20),
+
+	-- snapshotting fields
+	updated_at TIMESTAMP WITHOUT TIME ZONE,
+	dbt_valid_from TIMESTAMP WITHOUT TIME ZONE,
+	dbt_valid_to   TIMESTAMP WITHOUT TIME ZONE,
+	dbt_scd_id     TEXT,
+	dbt_updated_at TIMESTAMP WITHOUT TIME ZONE,
+    dbt_is_deleted TEXT
+);
+
+
+-- seed inserts
+--  use the same email for two users to verify that duplicated check_cols values
+--  are handled appropriately
+insert into {database}.{schema}.seed (id, first_name, last_name, email, gender, ip_address, updated_at) values
+(1, 'Judith', 'Kennedy', '(not provided)', 'Female', '54.60.24.128', '2015-12-24 12:19:28'),
+(2, 'Arthur', 'Kelly', '(not provided)', 'Male', '62.56.24.215', '2015-10-28 16:22:15'),
+(3, 'Rachel', 'Moreno', 'rmoreno2@msu.edu', 'Female', '31.222.249.23', '2016-04-05 02:05:30'),
+(4, 'Ralph', 'Turner', 'rturner3@hp.com', 'Male', '157.83.76.114', '2016-08-08 00:06:51'),
+(5, 'Laura', 'Gonzales', 'lgonzales4@howstuffworks.com', 'Female', '30.54.105.168', '2016-09-01 08:25:38'),
+(6, 'Katherine', 'Lopez', 'klopez5@yahoo.co.jp', 'Female', '169.138.46.89', '2016-08-30 18:52:11'),
+(7, 'Jeremy', 'Hamilton', 'jhamilton6@mozilla.org', 'Male', '231.189.13.133', '2016-07-17 02:09:46'),
+(8, 'Heather', 'Rose', 'hrose7@goodreads.com', 'Female', '87.165.201.65', '2015-12-29 22:03:56'),
+(9, 'Gregory', 'Kelly', 'gkelly8@trellian.com', 'Male', '154.209.99.7', '2016-03-24 21:18:16'),
+(10, 'Rachel', 'Lopez', 'rlopez9@themeforest.net', 'Female', '237.165.82.71', '2016-08-20 15:44:49'),
+(11, 'Donna', 'Welch', 'dwelcha@shutterfly.com', 'Female', '103.33.110.138', '2016-02-27 01:41:48'),
+(12, 'Russell', 'Lawrence', 'rlawrenceb@qq.com', 'Male', '189.115.73.4', '2016-06-11 03:07:09'),
+(13, 'Michelle', 'Montgomery', 'mmontgomeryc@scientificamerican.com', 'Female', '243.220.95.82', '2016-06-18 16:27:19'),
+(14, 'Walter', 'Castillo', 'wcastillod@pagesperso-orange.fr', 'Male', '71.159.238.196', '2016-10-06 01:55:44'),
+(15, 'Robin', 'Mills', 'rmillse@vkontakte.ru', 'Female', '172.190.5.50', '2016-10-31 11:41:21'),
+(16, 'Raymond', 'Holmes', 'rholmesf@usgs.gov', 'Male', '148.153.166.95', '2016-10-03 08:16:38'),
+(17, 'Gary', 'Bishop', 'gbishopg@plala.or.jp', 'Male', '161.108.182.13', '2016-08-29 19:35:20'),
+(18, 'Anna', 'Riley', 'arileyh@nasa.gov', 'Female', '253.31.108.22', '2015-12-11 04:34:27'),
+(19, 'Sarah', 'Knight', 'sknighti@foxnews.com', 'Female', '222.220.3.177', '2016-09-26 00:49:06'),
+(20, 'Phyllis', 'Fox', null, 'Female', '163.191.232.95', '2016-08-21 10:35:19');
+
+
+-- populate snapshot table
+insert into {database}.{schema}.snapshot_expected (
+    id,
+    first_name,
+    last_name,
+    email,
+    gender,
+    ip_address,
+    updated_at,
+    dbt_valid_from,
+    dbt_valid_to,
+    dbt_updated_at,
+    dbt_scd_id,
+    dbt_is_deleted
+)
+
+select
+    id,
+    first_name,
+    last_name,
+    email,
+    gender,
+    ip_address,
+    updated_at,
+    -- fields added by snapshotting
+    updated_at as dbt_valid_from,
+    null::timestamp as dbt_valid_to,
+    updated_at as dbt_updated_at,
+    md5(id || '-' || first_name || '|' || updated_at::text) as dbt_scd_id,
+    'False' as dbt_is_deleted
+from {database}.{schema}.seed;
@@ -0,0 +1,122 @@
+import os
+
+import pytest
+
+from dbt.tests.util import check_relations_equal, run_dbt
+
+snapshot_actual_sql = """
+{% snapshot snapshot_actual %}
+
+    {{
+        config(
+            unique_key='id || ' ~ "'-'" ~ ' || first_name',
+        )
+    }}
+
+    select * from {{target.database}}.{{target.schema}}.seed
+
+{% endsnapshot %}
+"""
+
+snapshots_yml = """
+snapshots:
+  - name: snapshot_actual
+    config:
+      strategy: timestamp
+      updated_at: updated_at
+      hard_deletes: new_record
+"""
+
+ref_snapshot_sql = """
+select * from {{ ref('snapshot_actual') }}
+"""
+
+
+invalidate_sql = """
+-- update records 11 - 21. Change email and updated_at field
+update {schema}.seed set
+    updated_at = updated_at + interval '1 hour',
+    email      =  case when id = 20 then 'pfoxj@creativecommons.org' else 'new_' || email end
+where id >= 10 and id <= 20;
+
+
+-- invalidate records 11 - 21
+update {schema}.snapshot_expected set
+    dbt_valid_to   = updated_at + interval '1 hour'
+where id >= 10 and id <= 20;
+
+"""
+
+update_sql = """
+-- insert v2 of the 11 - 21 records
+
+insert into {database}.{schema}.snapshot_expected (
+    id,
+    first_name,
+    last_name,
+    email,
+    gender,
+    ip_address,
+    updated_at,
+    dbt_valid_from,
+    dbt_valid_to,
+    dbt_updated_at,
+    dbt_scd_id,
+    dbt_is_deleted
+)
+
+select
+    id,
+    first_name,
+    last_name,
+    email,
+    gender,
+    ip_address,
+    updated_at,
+    -- fields added by snapshotting
+    updated_at as dbt_valid_from,
+    null::timestamp as dbt_valid_to,
+    updated_at as dbt_updated_at,
+    md5(id || '-' || first_name || '|' || updated_at::text) as dbt_scd_id,
+    'False' as dbt_is_deleted
+from {database}.{schema}.seed
+where id >= 10 and id <= 20;
+"""
+
+delete_sql = """
+delete from {schema}.seed where id = 1
+"""
+
+
+class TestSnapshotNewRecordMode:
+    @pytest.fixture(scope="class")
+    def snapshots(self):
+        return {"snapshot.sql": snapshot_actual_sql}
+
+    @pytest.fixture(scope="class")
+    def models(self):
+        return {
+            "snapshots.yml": snapshots_yml,
+            "ref_snapshot.sql": ref_snapshot_sql,
+        }
+
+    def test_snapshot_new_record_mode(self, project):
+        path = os.path.join(project.test_data_dir, "seed_new_record_mode.sql")
+        project.run_sql_file(path)
+        results = run_dbt(["snapshot"])
+        assert len(results) == 1
+
+        project.run_sql(invalidate_sql)
+        project.run_sql(update_sql)
+
+        results = run_dbt(["snapshot"])
+        assert len(results) == 1
+
+        check_relations_equal(project.adapter, ["snapshot_actual", "snapshot_expected"])
+
+        project.run_sql(delete_sql)
+
+        results = run_dbt(["snapshot"])
+        assert len(results) == 1
+
+        # TODO: Further validate results.