Add docstring for instrument_connection() and tests for database drivers

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

@@ -25,7 +25,7 @@
 
     import aiopg
     from opentelemetry.instrumentation.aiopg import AiopgInstrumentor
-
+    # Call instrument() to wrap all database connections
     AiopgInstrumentor().instrument()
 
     cnx = await aiopg.connect(database='Database')
@@ -35,12 +35,26 @@
     cnx.close()
 
     pool = await aiopg.create_pool(database='Database')
+
     cnx = await pool.acquire()
     cursor = await cnx.cursor()
     await cursor.execute("INSERT INTO test (testField) VALUES (123)")
     cursor.close()
     cnx.close()
 
+.. code-block:: python
+
+    import aiopg
+    from opentelemetry.instrumentation.aiopg import AiopgInstrumentor
+
+    # Alternatively, use instrument_connection for an individual connection
+    cnx = await aiopg.connect(database='Database')
+    instrumented_cnx = AiopgInstrumentor().instrument_connection(cnx)
+    cursor = await instrumented_cnx.cursor()
+    await cursor.execute("INSERT INTO test (testField) VALUES (123)")
+    cursor.close()
+    instrumented_cnx.close()
+
 API
 ---
 """

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

@@ -26,6 +26,7 @@
     import mysql.connector
     from opentelemetry.instrumentation.mysql import MySQLInstrumentor
 
+    # Call instrument() to wrap all database connections
     MySQLInstrumentor().instrument()
 
     cnx = mysql.connector.connect(database="MySQL_Database")
@@ -34,6 +35,19 @@
     cursor.close()
     cnx.close()
 
+.. code:: python
+
+    import mysql.connector
+    from opentelemetry.instrumentation.mysql import MySQLInstrumentor
+
+    # Alternatively, use instrument_connection for an individual connection
+    cnx = mysql.connector.connect(database="MySQL_Database")
+    instrumented_cnx = MySQLInstrumentor().instrument_connection(cnx)
+    cursor = instrumented_cnx.cursor()
+    cursor.execute("INSERT INTO test (testField) VALUES (123)")
+    cursor.close()
+    instrumented_cnx.close()
+
 API
 ---
 """
@@ -86,12 +100,16 @@ def instrument_connection(self, connection, tracer_provider=None):
         """Enable instrumentation in a MySQL connection.
 
         Args:
-            connection: The connection to instrument.
-            tracer_provider: The optional tracer provider to use. If omitted
-                the current globally configured one is used.
+            connection:
+                The existing MySQL connection instance to instrument. This connection is typically
+                obtained through `mysql.connector.connect()` and is instrumented to collect telemetry
+                data about database interactions.
+            tracer_provider:
+                An optional `TracerProvider` instance to use for tracing. If not provided, the globally
+                configured tracer provider will be automatically used.
 
         Returns:
-            An instrumented connection.
+            An instrumented MySQL connection with OpenTelemetry tracing enabled,
         """
         return dbapi.instrument_connection(
             __name__,

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

@@ -46,7 +46,7 @@
     import MySQLdb
     from opentelemetry.instrumentation.mysqlclient import MySQLClientInstrumentor
 
-
+    # Call instrument() to wrap all database connections
     MySQLClientInstrumentor().instrument(enable_commenter=True, commenter_options={})
 
     cnx = MySQLdb.connect(database="MySQL_Database")
@@ -56,6 +56,28 @@
     cursor.close()
     cnx.close()
 
+.. code:: python
+
+    import MySQLdb
+    from opentelemetry.instrumentation.mysqlclient import MySQLClientInstrumentor
+
+    # Alternatively, use instrument_connection for an individual connection
+    cnx = MySQLdb.connect(database="MySQL_Database")
+    instrumented_cnx = MySQLClientInstrumentor.instrument_connection(
+        cnx,
+        enable_commenter=True,
+        commenter_options={
+            "db_driver": True,
+            "mysql_client_version": True,
+            "driver_paramstyle": False
+        }
+    )
+    cursor = instrumented_cnx.cursor()
+    cursor.execute("INSERT INTO test (testField) VALUES (123)"
+    instrumented_cnx.commit()
+    cursor.close()
+    instrumented_cnx.close()
+
 For example,
 ::
 
@@ -162,12 +184,28 @@ def instrument_connection(
         """Enable instrumentation in a mysqlclient connection.
 
         Args:
-            connection: The connection to instrument.
-            tracer_provider: The optional tracer provider to use. If omitted
-                the current globally configured one is used.
-
+            connection:
+                The MySQL connection instance to instrument. This connection is typically
+                created using `MySQLdb.connect()` and needs to be wrapped to collect telemetry.
+            tracer_provider:
+                A custom `TracerProvider` instance to be used for tracing. If not specified,
+                the globally configured tracer provider will be used.
+            enable_commenter:
+                A flag to enable the OpenTelemetry SQLCommenter feature. If set to `True`,
+                SQL queries will be enriched with contextual information (e.g., database client details).
+                Default is `None`.
+            commenter_options:
+                A dictionary of configuration options for SQLCommenter. This allows you to customize
+                metadata appended to queries. Possible options include:
+
+                    - `db_driver`: Adds the database driver name and version.
+                    - `dbapi_threadsafety`: Adds threadsafety information.
+                    - `dbapi_level`: Adds the DB-API version.
+                    - `mysql_client_version`: Adds the MySQL client version.
+                    - `driver_paramstyle`: Adds the parameter style.
+                    - `opentelemetry_values`: Includes traceparent values.
         Returns:
-            An instrumented connection.
+            An instrumented MySQL connection with OpenTelemetry support enabled.
         """
 
         return dbapi.instrument_connection(

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

@@ -88,15 +88,29 @@
     import psycopg
     from opentelemetry.instrumentation.psycopg import PsycopgInstrumentor
 
-
+    # Call instrument() to wrap all database connections
     PsycopgInstrumentor().instrument()
 
     cnx = psycopg.connect(database='Database')
+
     cursor = cnx.cursor()
     cursor.execute("INSERT INTO test (testField) VALUES (123)")
     cursor.close()
     cnx.close()
 
+.. code-block:: python
+
+    import psycopg
+    from opentelemetry.instrumentation.psycopg import PsycopgInstrumentor
+
+    # Alternatively, use instrument_connection for an individual connection
+    cnx = psycopg.connect(database='Database')
+    instrumented_cnx = instrument_connection(cnx)
+    cursor = instrumented_cnx.cursor()
+    cursor.execute("INSERT INTO test (testField) VALUES (123)")
+    cursor.close()
+    instrumented_cnx.close()
+
 API
 ---
 """
@@ -196,6 +210,18 @@ def _uninstrument(self, **kwargs):
     # TODO(owais): check if core dbapi can do this for all dbapi implementations e.g, pymysql and mysql
     @staticmethod
     def instrument_connection(connection, tracer_provider=None):
+        """Enable instrumentation in a psycopg connection.
+
+        Args:
+            connection: psycopg.Connection
+                The psycopg connection object to be instrumented.
+            tracer_provider: opentelemetry.trace.TracerProvider, optional
+                The TracerProvider to use for instrumentation. If not provided,
+                the global TracerProvider will be used.
+
+        Returns:
+            An instrumented psycopg connection object.
+        """
         if not hasattr(connection, "_is_instrumented_by_opentelemetry"):
             connection._is_instrumented_by_opentelemetry = False
 

instrumentation/opentelemetry-instrumentation-psycopg2/src/opentelemetry/instrumentation/psycopg2/__init__.py

@@ -88,15 +88,29 @@
     import psycopg2
     from opentelemetry.instrumentation.psycopg2 import Psycopg2Instrumentor
 
-
+    # Call instrument() to wrap all database connections
     Psycopg2Instrumentor().instrument()
 
     cnx = psycopg2.connect(database='Database')
+
     cursor = cnx.cursor()
     cursor.execute("INSERT INTO test (testField) VALUES (123)")
     cursor.close()
     cnx.close()
 
+.. code-block:: python
+
+    import psycopg2
+    from opentelemetry.instrumentation.psycopg2 import Psycopg2Instrumentor
+
+    # Alternatively, use instrument_connection for an individual connection
+    cnx = psycopg2.connect(database='Database')
+    instrumented_cnx = Psycopg2Instrumentor.instrument_connection(cnx)
+    cursor = instrumented_cnx.cursor()
+    cursor.execute("INSERT INTO test (testField) VALUES (123)")
+    cursor.close()
+    instrumented_cnx.close()
+
 API
 ---
 """
@@ -160,6 +174,19 @@ def _uninstrument(self, **kwargs):
     # TODO(owais): check if core dbapi can do this for all dbapi implementations e.g, pymysql and mysql
     @staticmethod
     def instrument_connection(connection, tracer_provider=None):
+        """Enable instrumentation in a psycopg2 connection.
+
+        Args:
+            connection: psycopg2.extensions.connection
+                The psycopg2 connection object to be instrumented.
+            tracer_provider: opentelemetry.trace.TracerProvider, optional
+                The TracerProvider to use for instrumentation. If not specified,
+                the global TracerProvider will be used.
+
+        Returns:
+            An instrumented psycopg2 connection object.
+        """
+
         if not hasattr(connection, "_is_instrumented_by_opentelemetry"):
             connection._is_instrumented_by_opentelemetry = False
 

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

@@ -26,6 +26,7 @@
     import pymysql
     from opentelemetry.instrumentation.pymysql import PyMySQLInstrumentor
 
+    # Call instrument() to wrap all database connections
     PyMySQLInstrumentor().instrument()
 
     cnx = pymysql.connect(database="MySQL_Database")
@@ -35,6 +36,28 @@
     cursor.close()
     cnx.close()
 
+
+.. code:: python
+
+    import pymysql
+    from opentelemetry.instrumentation.pymysql import PyMySQLInstrumentor
+
+    # Alternatively, use instrument_connection for an individual connection
+    cnx = pymysql.connect(database="MySQL_Database")
+    instrumented_cnx = PyMySQLInstrumentor().instrument_connection(
+        cnx,
+        enable_commenter=True,
+        commenter_options={
+            "db_driver": True,
+            "mysql_client_version": True
+        }
+    )
+    cursor = instrumented_cnx.cursor()
+    cursor.execute("INSERT INTO test (testField) VALUES (123)"
+    instrumented_cnx.commit()
+    cursor.close()
+    instrumented_cnx.close()
+
 SQLCOMMENTER
 *****************************************
 You can optionally configure PyMySQL instrumentation to enable sqlcommenter which enriches
@@ -165,10 +188,20 @@ def instrument_connection(
         """Enable instrumentation in a PyMySQL connection.
 
         Args:
-            connection: The connection to instrument.
-            tracer_provider: The optional tracer provider to use. If omitted
-                the current globally configured one is used.
-
+            connection:
+                The existing PyMySQL connection instance that needs to be instrumented.
+                This connection was typically created using `pymysql.connect()` and is wrapped with OpenTelemetry tracing.
+            tracer_provider:
+                An optional `TracerProvider` instance that specifies which tracer provider should be used.
+                If not provided, the globally configured OpenTelemetry tracer provider is automatically applied.
+            enable_commenter:
+                A flag to enable the SQL Commenter feature. If `True`, query logs will be enriched with additional
+                contextual metadata (e.g., database version, traceparent IDs, driver information).
+            commenter_options:
+                A dictionary containing configuration options for the SQL Commenter feature.
+                You can specify various options, such as enabling driver information, database version logging,
+                traceparent propagation, and other customizable metadata enhancements.
+                See *SQLCommenter Configurations* above for more information.
         Returns:
             An instrumented connection.
         """

instrumentation/opentelemetry-instrumentation-sqlite3/src/opentelemetry/instrumentation/sqlite3/__init__.py

@@ -27,7 +27,7 @@
     import sqlite3
     from opentelemetry.instrumentation.sqlite3 import SQLite3Instrumentor
 
-
+    # Call instrument() to wrap all database connections
     SQLite3Instrumentor().instrument()
 
     cnx = sqlite3.connect(':memory:')
@@ -37,6 +37,21 @@
     cursor.close()
     cnx.close()
 
+.. code:: python
+
+    import sqlite3
+    from opentelemetry.instrumentation.sqlite3 import SQLite3Instrumentor
+
+    # Alternatively, use instrument_connection for an individual connection
+    conn = sqlite3.connect(":memory:")
+    instrumented_connection = SQLite3Instrumentor.instrument_connection(conn)
+    cursor = instrumented_connection.cursor()
+    cursor.execute("CREATE TABLE test (testField INTEGER)")
+    cursor.execute("INSERT INTO test (testField) VALUES (123)")
+    cursor.execute("SELECT * FROM test")
+    cursor.close()
+    instrumented_connection.close()
+
 API
 ---
 """
@@ -104,9 +119,14 @@ def instrument_connection(
                 the current globally configured one is used.
 
         Returns:
-            An instrumented connection.
-        """
+            An instrumented SQLite connection that supports
+            telemetry for tracing database operations.
 
+        Notes:
+            - Instrumentation must be explicitly applied to the connection object
+              for tracing to work. This is not done automatically by simply calling
+              `SQLite3Instrumentor().instrument()`.
+        """
         return dbapi.instrument_connection(
             __name__,
             connection,