Backport dbt show enhancements into 1.5.latest

core/dbt/task/show.py

@@ -2,12 +2,14 @@
 import threading
 import time
 
+from dbt.contracts.graph.nodes import SeedNode
 from dbt.contracts.results import RunResult, RunStatus
 from dbt.events.base_types import EventLevel
 from dbt.events.functions import fire_event
 from dbt.events.types import ShowNode, Note
 from dbt.exceptions import DbtRuntimeError
 from dbt.task.compile import CompileTask, CompileRunner
+from dbt.task.seed import SeedRunner
 
 
 class ShowRunner(CompileRunner):
@@ -17,6 +19,12 @@ def __init__(self, config, adapter, node, node_index, num_nodes):
 
     def execute(self, compiled_node, manifest):
         start_time = time.time()
+
+        if "sql_header" in compiled_node.unrendered_config:
+            compiled_node.compiled_code = (
+                compiled_node.unrendered_config["sql_header"] + compiled_node.compiled_code
+            )
+
         adapter_response, execute_result = self.adapter.execute(
             compiled_node.compiled_code, fetch=True
         )
@@ -41,8 +49,11 @@ def _runtime_initialize(self):
             raise DbtRuntimeError("Either --select or --inline must be passed to show")
         super()._runtime_initialize()
 
-    def get_runner_type(self, _):
-        return ShowRunner
+    def get_runner_type(self, node):
+        if isinstance(node, SeedNode):
+            return SeedRunner
+        else:
+            return ShowRunner
 
     def task_end_messages(self, results):
         is_inline = bool(getattr(self.args, "inline", None))

tests/functional/show/fixtures.py

@@ -10,6 +10,14 @@
 from {{ ref('sample_model') }}
 """
 
+models__sql_header = """
+{% call set_sql_header(config) %}
+set session time zone 'Asia/Kolkata';
+{%- endcall %}
+select current_setting('timezone') as timezone
+"""
+
+
 schema_yml = """
 models:
   - name: sample_model

tests/functional/show/test_show.py

@@ -9,6 +9,7 @@
     models__second_model,
     models__ephemeral_model,
     schema_yml,
+    models__sql_header,
 )
 
 
@@ -19,6 +20,7 @@ def models(self):
             "sample_model.sql": models__sample_model,
             "second_model.sql": models__second_model,
             "ephemeral_model.sql": models__ephemeral_model,
+            "sql_header.sql": models__sql_header,
         }
 
     @pytest.fixture(scope="class")
@@ -87,6 +89,15 @@ def test_second_ephemeral_model(self, project):
         )
         assert "col_hundo" in log_output
 
+    def test_seed(self, project):
+        (results, log_output) = run_dbt_and_capture(["show", "--select", "sample_seed"])
+        assert "Previewing node 'sample_seed'" in log_output
+
+    def test_sql_header(self, project):
+        run_dbt(["build"])
+        (results, log_output) = run_dbt_and_capture(["show", "--select", "sql_header"])
+        assert "Asia/Kolkata" in log_output
+
 
 class TestShowModelVersions:
     @pytest.fixture(scope="class")