bug_fix(1477): type handling in _add_sql_comment

Author: aryabharat

Diff for: opentelemetry-instrumentation/src/opentelemetry/instrumentation/sqlcommenter_utils.py

@@ -22,6 +22,8 @@ def _add_sql_comment(sql, **meta) -> str:
     """
     meta.update(**_add_framework_tags())
     comment = _generate_sql_comment(**meta)
+    # converting to str to handle any type errors
+    sql = str(sql)
     sql = sql.rstrip()
     if sql[-1] == ";":
         sql = sql[:-1] + comment + ";"

Diff for: opentelemetry-instrumentation/tests/test_utils.py

@@ -208,6 +208,21 @@ def test_add_sql_comments_without_comments(self):
 
         self.assertEqual(commented_sql_without_semicolon, "Select 1")
 
+    def test_psycopg2_sql_composable(self):
+        """Test handling of psycopg2.sql.Composable input"""
+        # Mock psycopg2.sql.Composable object
+        class MockComposable:
+            def __str__(self):
+                return "SELECT * FROM table_name"
+
+        sql_query = MockComposable()
+        comments = {"trace_id": "abc123"}
+        
+        result = _add_sql_comment(sql_query, **comments)
+        expected = "SELECT * FROM table_name /*trace_id='abc123'*/"
+        
+        self.assertEqual(result, expected)
+
     def test_is_instrumentation_enabled_by_default(self):
         self.assertTrue(is_instrumentation_enabled())
         self.assertTrue(is_http_instrumentation_enabled())