fix whitespace issue with incremental sql

.changes/unreleased/Fixes-20230109-105325.yaml

@@ -0,0 +1,7 @@
+kind: Fixes
+body: stop eliminating trailing whitespace in incremental merge sql
+time: 2023-01-09T10:53:25.837837-08:00
+custom:
+  Author: colin-rogers-dbt
+  Issue: "457"
+  PR: "458"

.github/workflows/main.yml

@@ -182,11 +182,10 @@ jobs:
         uses: actions/[email protected]
         with:
           python-version: ${{ matrix.python-version }}
-
       - name: Install python dependencies
         run: |
           python -m pip install --user --upgrade pip
-          python -m pip install --upgrade wheel
+          python -m pip install --upgrade wheel setuptools twine check-wheel-contents
           python -m pip --version
       - uses: actions/download-artifact@v2
         with:

dbt/include/bigquery/macros/materializations/incremental_strategy/merge.sql

@@ -16,7 +16,7 @@
             {{ wrap_with_time_ingestion_partitioning_sql(build_partition_time_exp(partition_by), sql, True) }}
             {%- else -%}
             {{sql}}
-            {%- endif -%}
+            {%- endif %}
         )
         {%- endif -%}
     {%- endset -%}

setup.py

@@ -81,6 +81,7 @@ def _dbt_core_version(plugin_version: str) -> str:
         "googleapis-common-protos~=1.6",
         "google-cloud-storage~=2.4",
         "google-cloud-dataproc~=5.0",
+        "agate>=1.6.3,<1.7",
     ],
     zip_safe=False,
     classifiers=[

tests/functional/test_incremental_materialization.py

@@ -0,0 +1,44 @@
+import pytest
+import os
+from dbt.tests.util import (
+    run_dbt
+)
+
+# This is a short term hack, we need to go back 
+# and make adapter implementations of:
+# https://github.com/dbt-labs/dbt-core/pull/6330
+
+_INCREMENTAL_MODEL = """
+{{
+    config(
+        materialized="incremental",
+    )
+}}
+
+{% if not is_incremental() %}
+
+    select 10 as id, cast('2020-01-01 01:00:00' as datetime) as date_hour union all
+    select 30 as id, cast('2020-01-01 02:00:00' as datetime) as date_hour
+
+{% else %}
+
+    select 20 as id, cast('2020-01-01 01:00:00' as datetime) as date_hour union all
+    select 40 as id, cast('2020-01-01 02:00:00' as datetime) as date_hour
+
+{% endif %}
+-- Test Comment To Prevent Reccurence of https://github.com/dbt-labs/dbt-core/issues/6485
+"""
+
+class BaseIncrementalModelConfig:
+    @pytest.fixture(scope="class")
+    def models(self):
+        return {
+            "test_incremental.sql": _INCREMENTAL_MODEL
+        }
+
+class TestIncrementalModel(BaseIncrementalModelConfig):
+    def test_incremental_model_succeeds(self, project):
+        results = run_dbt(["run"])
+        assert len(results) == 1
+        results = run_dbt(["run"])
+        assert len(results) == 1