fix enable_commenter functionality (#1440)

CHANGELOG.md

@@ -47,6 +47,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#1461](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/1461))
 - Add grpc.aio instrumentation to package entry points
   ([#1442](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/1442))
+- Fix a bug in SQLAlchemy instrumentation - support disabling enable_commenter variable
+  ([#1440](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/1440))
 
 ## Version 1.14.0/0.35b0 (2022-11-03)
 

instrumentation/opentelemetry-instrumentation-sqlalchemy/src/opentelemetry/instrumentation/sqlalchemy/__init__.py

@@ -136,11 +136,16 @@ class SQLAlchemyInstrumentor(BaseInstrumentor):
             An instrumented engine if passed in as an argument or list of instrumented engines, None otherwise.
         """
         tracer_provider = kwargs.get("tracer_provider")
-        _w("sqlalchemy", "create_engine", _wrap_create_engine(tracer_provider))
+        enable_commenter = kwargs.get("enable_commenter", False)
+        _w(
+            "sqlalchemy",
+            "create_engine",
+            _wrap_create_engine(tracer_provider, enable_commenter),
+        )
         _w(
             "sqlalchemy.engine",
             "create_engine",
-            _wrap_create_engine(tracer_provider),
+            _wrap_create_engine(tracer_provider, enable_commenter),
         )
         _w(
             "sqlalchemy.engine.base",
@@ -151,7 +156,7 @@ class SQLAlchemyInstrumentor(BaseInstrumentor):
             _w(
                 "sqlalchemy.ext.asyncio",
                 "create_async_engine",
-                _wrap_create_async_engine(tracer_provider),
+                _wrap_create_async_engine(tracer_provider, enable_commenter),
             )
         if kwargs.get("engine") is not None:
             return EngineTracer(

instrumentation/opentelemetry-instrumentation-sqlalchemy/src/opentelemetry/instrumentation/sqlalchemy/engine.py

@@ -49,27 +49,29 @@ def _get_tracer(tracer_provider=None):
     )
 
 
-def _wrap_create_async_engine(tracer_provider=None):
+def _wrap_create_async_engine(tracer_provider=None, enable_commenter=False):
     # pylint: disable=unused-argument
     def _wrap_create_async_engine_internal(func, module, args, kwargs):
         """Trace the SQLAlchemy engine, creating an `EngineTracer`
         object that will listen to SQLAlchemy events.
         """
         engine = func(*args, **kwargs)
-        EngineTracer(_get_tracer(tracer_provider), engine.sync_engine)
+        EngineTracer(
+            _get_tracer(tracer_provider), engine.sync_engine, enable_commenter
+        )
         return engine
 
     return _wrap_create_async_engine_internal
 
 
-def _wrap_create_engine(tracer_provider=None):
+def _wrap_create_engine(tracer_provider=None, enable_commenter=False):
     # pylint: disable=unused-argument
     def _wrap_create_engine_internal(func, module, args, kwargs):
         """Trace the SQLAlchemy engine, creating an `EngineTracer`
         object that will listen to SQLAlchemy events.
         """
         engine = func(*args, **kwargs)
-        EngineTracer(_get_tracer(tracer_provider), engine)
+        EngineTracer(_get_tracer(tracer_provider), engine, enable_commenter)
         return engine
 
     return _wrap_create_engine_internal
@@ -94,7 +96,7 @@ def _wrap_connect(tracer_provider=None):
 
 class EngineTracer:
     def __init__(
-        self, tracer, engine, enable_commenter=True, commenter_options=None
+        self, tracer, engine, enable_commenter=False, commenter_options=None
     ):
         self.tracer = tracer
         self.engine = engine

instrumentation/opentelemetry-instrumentation-sqlalchemy/tests/test_sqlcommenter.py

@@ -77,3 +77,30 @@ class TestSqlalchemyInstrumentationWithSQLCommenter(TestBase):
             self.caplog.records[-2].getMessage(),
             r"SELECT  1 /\*db_driver='(.*)',flask=1,traceparent='\d{1,2}-[a-zA-Z0-9_]{32}-[a-zA-Z0-9_]{16}-\d{1,2}'\*/;",
         )
+
+    def test_sqlcommenter_enabled_create_engine_after_instrumentation(self):
+        SQLAlchemyInstrumentor().instrument(
+            tracer_provider=self.tracer_provider,
+            enable_commenter=True,
+        )
+        from sqlalchemy import create_engine  # pylint: disable-all
+
+        engine = create_engine("sqlite:///:memory:")
+        cnx = engine.connect()
+        cnx.execute("SELECT 1;").fetchall()
+        self.assertRegex(
+            self.caplog.records[-2].getMessage(),
+            r"SELECT 1 /\*db_driver='(.*)',traceparent='\d{1,2}-[a-zA-Z0-9_]{32}-[a-zA-Z0-9_]{16}-\d{1,2}'\*/;",
+        )
+
+    def test_sqlcommenter_disabled_create_engine_after_instrumentation(self):
+        SQLAlchemyInstrumentor().instrument(
+            tracer_provider=self.tracer_provider,
+            enable_commenter=False,
+        )
+        from sqlalchemy import create_engine  # pylint: disable-all
+
+        engine = create_engine("sqlite:///:memory:")
+        cnx = engine.connect()
+        cnx.execute("SELECT 1;").fetchall()
+        self.assertEqual(self.caplog.records[-2].getMessage(), "SELECT 1;")