Update ShowTaskDirect to correctly handle --limit -1 (#11284)

* Update  to support  properly

* changelog

.changes/unreleased/Fixes-20250207-131424.yaml

@@ -0,0 +1,6 @@
+kind: Fixes
+body: Handle `--limit -1` properly in `ShowTaskDirect` so that it propagates None instead of a negative int
+time: 2025-02-07T13:14:24.725503-05:00
+custom:
+    Author: WilliamDee
+    Issue: None

core/dbt/task/show.py

@@ -128,9 +128,8 @@ class ShowTaskDirect(ConfiguredTask):
     def run(self):
         adapter = get_adapter(self.config)
         with adapter.connection_named("show", should_release_connection=False):
-            response, table = adapter.execute(
-                self.args.inline_direct, fetch=True, limit=self.args.limit
-            )
+            limit = None if self.args.limit < 0 else self.args.limit
+            response, table = adapter.execute(self.args.inline_direct, fetch=True, limit=limit)
 
             output = io.StringIO()
             if self.args.output == "json":

tests/functional/show/test_show.py

@@ -181,6 +181,16 @@ def test_inline_direct_pass_quiet(self, project):
         # See prior test for explanation of why this is here
         run_dbt(["seed"])
 
+    def test_inline_direct_pass_no_limit(self, project):
+        query = f"select * from {project.test_schema}.sample_seed"
+        (_, log_output) = run_dbt_and_capture(["show", "--inline-direct", query, "--limit", -1])
+        assert "Previewing inline node" in log_output
+        assert "sample_num" in log_output
+        assert "sample_bool" in log_output
+
+        # See prior test for explanation of why this is here
+        run_dbt(["seed"])
+
 
 class TestShowInlineDirectFail(ShowBase):