Add mysql-connector sqlcomment support

Author: tammy-baylis-swi

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

@@ -50,6 +50,75 @@
     cursor.close()
     instrumented_cnx.close()
 
+SQLCOMMENTER
+*****************************************
+You can optionally configure mysql-connector instrumentation to enable sqlcommenter which enriches the query with contextual information.
+
+Usage
+-----
+
+.. code:: python
+
+    import mysql.connector
+    from opentelemetry.instrumentation.mysql import MySQLInstrumentor
+
+    MySQLInstrumentor().instrument(enable_commenter=True, commenter_options={})
+
+    cnx = mysql.connector.connect(database="MySQL_Database")
+    cursor = cnx.cursor()
+    cursor.execute("INSERT INTO test (testField) VALUES (123)")
+    cursor.close()
+    cnx.close()
+
+
+For example,
+::
+
+   Invoking cursor.execute("INSERT INTO test (testField) VALUES (123)") will lead to sql query "INSERT INTO test (testField) VALUES (123)" but when SQLCommenter is enabled
+   the query will get appended with some configurable tags like "INSERT INTO test (testField) VALUES (123) /*tag=value*/;"
+
+**WARNING:** sqlcommenter for mysql-connector instrumentation should NOT be used if your application initializes cursors with ``prepared=True``, which will natively prepare and execute MySQL statements. Adding sqlcommenting will introduce a severe performance penalty by repeating ``Prepare`` of statements by mysql-connector that are made unique by traceparent in sqlcomment. The penalty does not happen if cursor ``prepared=False`` (default) and instrumentor ``enable_commenter=True``.
+
+SQLCommenter Configurations
+***************************
+We can configure the tags to be appended to the sqlquery log by adding configuration inside commenter_options(default:{}) keyword
+
+db_driver = True(Default) or False
+
+For example,
+::
+Enabling this flag will add mysql.connector and its version, e.g. /*mysql.connector%%3A1.2.3*/
+
+dbapi_threadsafety = True(Default) or False
+
+For example,
+::
+Enabling this flag will add threadsafety /*dbapi_threadsafety=2*/
+
+dbapi_level = True(Default) or False
+
+For example,
+::
+Enabling this flag will add dbapi_level /*dbapi_level='2.0'*/
+
+mysql_client_version = True(Default) or False
+
+For example,
+::
+Enabling this flag will add mysql_client_version /*mysql_client_version='123'*/
+
+driver_paramstyle = True(Default) or False
+
+For example,
+::
+Enabling this flag will add driver_paramstyle /*driver_paramstyle='pyformat'*/
+
+opentelemetry_values = True(Default) or False
+
+For example,
+::
+Enabling this flag will add traceparent values /*traceparent='00-03afa25236b8cd948fa853d67038ac79-405ff022e8247c46-01'*/
+
 API
 ---
 """
@@ -82,6 +151,8 @@ def _instrument(self, **kwargs):
         https://dev.mysql.com/doc/connector-python/en/
         """
         tracer_provider = kwargs.get("tracer_provider")
+        enable_sqlcommenter = kwargs.get("enable_commenter", False)
+        commenter_options = kwargs.get("commenter_options", {})
 
         dbapi.wrap_connect(
             __name__,
@@ -91,14 +162,22 @@ def _instrument(self, **kwargs):
             self._CONNECTION_ATTRIBUTES,
             version=__version__,
             tracer_provider=tracer_provider,
+            enable_commenter=enable_sqlcommenter,
+            commenter_options=commenter_options,
         )
 
     def _uninstrument(self, **kwargs):
         """ "Disable MySQL instrumentation"""
         dbapi.unwrap_connect(mysql.connector, "connect")
 
     # pylint:disable=no-self-use
-    def instrument_connection(self, connection, tracer_provider=None):
+    def instrument_connection(
+        self,
+        connection,
+        tracer_provider=None,
+        enable_commenter=None,
+        commenter_options=None,
+    ):
         """Enable instrumentation in a MySQL connection.
 
         Args:
@@ -109,6 +188,10 @@ def instrument_connection(self, connection, tracer_provider=None):
             tracer_provider:
                 An optional `TracerProvider` instance to use for tracing. If not provided, the globally
                 configured tracer provider will be automatically used.
+            enable_commenter:
+                Optional flag to enable/disable sqlcommenter (default False).
+            commenter_options:
+                Optional configurations for tags to be appended at the sql query.
 
         Returns:
             An instrumented MySQL connection with OpenTelemetry tracing enabled.
@@ -120,6 +203,8 @@ def instrument_connection(self, connection, tracer_provider=None):
             self._CONNECTION_ATTRIBUTES,
             version=__version__,
             tracer_provider=tracer_provider,
+            enable_commenter=enable_commenter,
+            commenter_options=commenter_options,
         )
 
     def uninstrument_connection(self, connection):

instrumentation/opentelemetry-instrumentation-mysql/tests/test_mysql_integration.py

@@ -102,6 +102,42 @@ def test_instrument_connection_no_op_tracer_provider(self, mock_connect):
         spans_list = self.memory_exporter.get_finished_spans()
         self.assertEqual(len(spans_list), 0)
 
+    @mock.patch("opentelemetry.instrumentation.dbapi.instrument_connection")
+    @mock.patch("mysql.connector.connect")
+    # pylint: disable=unused-argument
+    def test_instrument_connection_enable_commenter(
+        self,
+        mock_connect,
+        mock_instrument_connection,
+    ):
+        cnx, query = connect_and_execute_query()
+        cnx = MySQLInstrumentor().instrument_connection(
+            cnx,
+            enable_commenter=True,
+            commenter_options={"foo": True},
+        )
+        cursor = cnx.cursor()
+        cursor.execute(query)
+        kwargs = mock_instrument_connection.call_args[1]
+        self.assertEqual(kwargs["enable_commenter"], True)
+        self.assertEqual(kwargs["commenter_options"], {"foo": True})
+
+    @mock.patch("opentelemetry.instrumentation.dbapi.wrap_connect")
+    @mock.patch("mysql.connector.connect")
+    # pylint: disable=unused-argument
+    def test__instrument_enable_commenter(
+        self,
+        mock_connect,
+        mock_wrap_connect,
+    ):
+        MySQLInstrumentor()._instrument(
+            enable_commenter=True,
+            commenter_options={"foo": True},
+        )
+        kwargs = mock_wrap_connect.call_args[1]
+        self.assertEqual(kwargs["enable_commenter"], True)
+        self.assertEqual(kwargs["commenter_options"], {"foo": True})
+
     @mock.patch("mysql.connector.connect")
     # pylint: disable=unused-argument
     def test_uninstrument_connection(self, mock_connect):