add dbt show tests

dev-requirements.txt

@@ -1,8 +1,8 @@
 # install latest changes in dbt-core + dbt-postgres
 # TODO: how to switch from HEAD to x.y.latest branches after minor releases?
-git+https://github.com/dbt-labs/dbt-core.git#egg=dbt-core&subdirectory=core
-git+https://github.com/dbt-labs/dbt-core.git#egg=dbt-tests-adapter&subdirectory=tests/adapter
-git+https://github.com/dbt-labs/dbt-core.git#egg=dbt-postgres&subdirectory=plugins/postgres
+git+https://github.com/dbt-labs/dbt-core.git@8496/limit-in-show-query#egg=dbt-core&subdirectory=core
+git+https://github.com/dbt-labs/dbt-core.git@8496/limit-in-show-query#egg=dbt-tests-adapter&subdirectory=tests/adapter
+git+https://github.com/dbt-labs/dbt-core.git@8496/limit-in-show-query#egg=dbt-postgres&subdirectory=plugins/postgres
 
 # if version 1.x or greater -> pin to major version
 # if version 0.x -> pin to minor

tests/functional/adapter/dbt_show/test_dbt_show.py

@@ -0,0 +1,29 @@
+import pytest
+from dbt.tests.adapter.dbt_show.test_dbt_show import BaseShowSqlHeader, BaseShowLimit
+
+
+my_model_sql_header_sql = """
+{{
+  config(
+    materialized = "table"
+  )
+}}
+{% call set_sql_header(config) %}
+CREATE TEMPORARY TABLE _variables AS (
+    SELECT '89' as my_variable
+);
+{% endcall %}
+SELECT my_variable from _variables
+"""
+
+
+class TestRedshiftShowLimit(BaseShowLimit):
+    pass
+
+
+class TestRedshiftShowSqlHeader(BaseShowSqlHeader):
+    @pytest.fixture(scope="class")
+    def models(self):
+        return {
+            "sql_header.sql": my_model_sql_header_sql,
+        }