feat: welcome presto to the suite of tested databases (#10498)

* Add presto to the CI

Sample test data

Datetime conversion

Sample test data

Fix tests

* TODO to switch to timestamps

* Address feedback

* Update requirements

* Add TODOs

Co-authored-by: bogdan kyryliuk <bogdankyryliuk@dropbox.com>

.github/workflows/superset-python.yml

@@ -92,6 +92,66 @@ jobs:
       - name: Test babel extraction
         run: flask fab babel-extract --target superset/translations --output superset/translations/messages.pot --config superset/translations/babel.cfg -k _,__,t,tn,tct
 
+  test-postgres-presto:
+      runs-on: ubuntu-18.04
+      strategy:
+        matrix:
+          # run unit tests in multiple version just for fun
+          python-version: [3.8]
+      env:
+        PYTHONPATH: ${{ github.workspace }}
+        SUPERSET_CONFIG: tests.superset_test_config
+        REDIS_PORT: 16379
+        SUPERSET__SQLALCHEMY_DATABASE_URI:
+          postgresql+psycopg2://superset:superset@127.0.0.1:15432/superset
+        SUPERSET__SQLALCHEMY_EXAMPLES_URI:
+          presto://localhost:15433/memory/default
+      services:
+        postgres:
+          image: postgres:10-alpine
+          env:
+            POSTGRES_USER: superset
+            POSTGRES_PASSWORD: superset
+          ports:
+            # Use custom ports for services to avoid accidentally connecting to
+            # GitHub action runner's default installations
+            - 15432:5432
+        presto:
+          image: prestosql/presto:339
+          env:
+            POSTGRES_USER: superset
+            POSTGRES_PASSWORD: superset
+          ports:
+            # Use custom ports for services to avoid accidentally connecting to
+            # GitHub action runner's default installations
+            - 15433:8080
+        redis:
+          image: redis:5-alpine
+          ports:
+            - 16379:6379
+      steps:
+      - uses: actions/checkout@v2
+      - name: Setup Python
+        uses: actions/setup-python@v2.1.1
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        uses: apache-superset/cached-dependencies@b90713b
+        with:
+          run: |
+            apt-get-install
+            pip-upgrade
+            pip install -r requirements/testing.txt
+            setup-postgres
+      - name: Run celery
+        run: celery worker --app=superset.tasks.celery_app:app -Ofair -c 2 &
+      - name: Python unit tests (PostgreSQL)
+        run: |
+          ./scripts/python_tests.sh
+      - name: Upload code coverage
+        run: |
+          bash <(curl -s https://codecov.io/bash) -cF python
+
   test-postgres:
     runs-on: ubuntu-18.04
     strategy: