Add test case for ambiguous join path.

Author: plypaul

tests_metricflow/test_sg_error.py

@@ -0,0 +1,31 @@
+from __future__ import annotations
+
+import logging
+
+from metricflow_semantics.test_helpers.manifest_helpers import (
+    mf_load_manifest_from_yaml_directory,
+)
+from metricflow_semantics.test_helpers.semantic_manifest_yamls.sg_08_ambiguous_multi_hop_join import (
+    SG_08_AMBIGUOUS_MULTI_HOP_JOIN,
+)
+
+from metricflow.protocols.sql_client import SqlClient
+from tests_metricflow.performance.test_profiling_examples import mf_explain_saved_query
+
+logger = logging.getLogger(__name__)
+
+
+def test_compare_ambiguous_join_path(sql_client: SqlClient) -> None:
+    """Compare `explain` output between the legacy resolver and the SG resolver for an ambiguous join path."""
+    manifest = mf_load_manifest_from_yaml_directory(
+        SG_08_AMBIGUOUS_MULTI_HOP_JOIN.directory, template_mapping={"source_schema": "dummy_schema"}
+    )
+    explain_result = mf_explain_saved_query(
+        manifest, sql_client, saved_query_names=["bookings_saved_query"], use_semantic_graph=False
+    )
+    assert explain_result is not None
+
+    explain_result = mf_explain_saved_query(
+        manifest, sql_client, saved_query_names=["bookings_saved_query"], use_semantic_graph=True
+    )
+    assert explain_result is None