added test and updated snapshots

metricflow/test/snapshots/test_engine_specific_rendering.py/SqlQueryPlan/BigQuerySqlClient/test_generate_uuid__plan0.sql

@@ -0,0 +1,4 @@
+-- Test Generate UUID Expression
+SELECT
+  GENERATE_UUID() AS uuid
+FROM foo.bar a

metricflow/test/snapshots/test_engine_specific_rendering.py/SqlQueryPlan/DatabricksSqlClient/test_generate_uuid__plan0.sql

@@ -0,0 +1,4 @@
+-- Test Generate UUID Expression
+SELECT
+  UUID() AS uuid
+FROM foo.bar a

metricflow/test/snapshots/test_engine_specific_rendering.py/SqlQueryPlan/DuckDbSqlClient/test_generate_uuid__plan0.sql

@@ -0,0 +1,4 @@
+-- Test Generate UUID Expression
+SELECT
+  GEN_RANDOM_UUID() AS uuid
+FROM foo.bar a

metricflow/test/snapshots/test_engine_specific_rendering.py/SqlQueryPlan/PostgresSqlClient/test_generate_uuid__plan0.sql

@@ -0,0 +1,4 @@
+-- Test Generate UUID Expression
+SELECT
+  GEN_RANDOM_UUID() AS uuid
+FROM foo.bar a

metricflow/test/snapshots/test_engine_specific_rendering.py/SqlQueryPlan/RedshiftSqlClient/test_generate_uuid__plan0.sql

@@ -0,0 +1,4 @@
+-- Test Generate UUID Expression
+SELECT
+  CONCAT(CAST(RANDOM()*100000000 AS INT)::VARCHAR,CAST(RANDOM()*100000000 AS INT)::VARCHAR) AS uuid
+FROM foo.bar a

metricflow/test/snapshots/test_engine_specific_rendering.py/SqlQueryPlan/SnowflakeSqlClient/test_generate_uuid__plan0.sql

@@ -0,0 +1,4 @@
+-- Test Generate UUID Expression
+SELECT
+  UUID_STRING() AS uuid
+FROM foo.bar a

metricflow/test/sql/test_engine_specific_rendering.py

@@ -4,6 +4,7 @@
 from metricflow.protocols.sql_client import SqlClient
 from metricflow.sql.sql_exprs import (
     SqlCastToTimestampExpression,
+    SqlGenerateUuidExpression,
     SqlStringLiteralExpression,
 )
 from metricflow.sql.sql_plan import (
@@ -36,8 +37,6 @@ def test_cast_to_timestamp(
     ]
 
     from_source = SqlTableFromClauseNode(sql_table=SqlTable(schema_name="foo", table_name="bar"))
-
-    from_source = from_source
     from_source_alias = "a"
     joins_descs: List[SqlJoinDescription] = []
     where = None
@@ -60,3 +59,37 @@ def test_cast_to_timestamp(
         plan_id="plan0",
         sql_client=sql_client,
     )
+
+
+def test_generate_uuid(
+    request: FixtureRequest,
+    mf_test_session_state: MetricFlowTestSessionState,
+    sql_client: SqlClient,
+) -> None:
+    """Tests rendering of the generate uuid expression in a query."""
+
+    select_columns = [
+        SqlSelectColumn(
+            expr=SqlGenerateUuidExpression(),
+            column_alias="uuid",
+        ),
+    ]
+    from_source = SqlTableFromClauseNode(sql_table=SqlTable(schema_name="foo", table_name="bar"))
+    from_source_alias = "a"
+
+    assert_rendered_sql_equal(
+        request=request,
+        mf_test_session_state=mf_test_session_state,
+        select_node=SqlSelectStatementNode(
+            description="Test Generate UUID Expression",
+            select_columns=tuple(select_columns),
+            from_source=from_source,
+            from_source_alias=from_source_alias,
+            joins_descs=(),
+            where=None,
+            group_bys=(),
+            order_bys=(),
+        ),
+        plan_id="plan0",
+        sql_client=sql_client,
+    )