review comment

Author: surbhigarg92

.readme-partials.yaml

@@ -183,6 +183,7 @@ custom_content: |
   
   > Note: The attribute keys that are used for additional information about retry attempts and the number of requests might change in a future release.
 
+
   ### Instrument with OpenCensus
 
   > Note: OpenCensus project is deprecated. See [Sunsetting OpenCensus](https://opentelemetry.io/blog/2023/sunsetting-opencensus/).
@@ -315,6 +316,38 @@ custom_content: |
 
   Spanner spanner = options.getService();
   ```
+  
+  #### OpenTelemetry SQL Statement Tracing
+  The OpenTelemetry traces that are generated by the Java client include any request and transaction
+  tags that have been set. The traces can also include the SQL statements that are executed and the
+  name of the thread that executes the statement. Enable this with the `enableExtendedTracing`
+  option:
+
+  ```
+  SpannerOptions options = SpannerOptions.newBuilder()
+    .setOpenTelemetry(openTelemetry)
+    .setEnableExtendedTracing(true)
+    .build();
+  ```
+
+  This option can also be enabled by setting the environment variable
+  `SPANNER_ENABLE_EXTENDED_TRACING=true`.
+
+  #### OpenTelemetry API Tracing
+  You can enable tracing of each API call that the Spanner client executes with the `enableApiTracing`
+  option. These traces also include any retry attempts for an API call:
+    
+  ```
+  SpannerOptions options = SpannerOptions.newBuilder()
+  .setOpenTelemetry(openTelemetry)
+  .setEnableApiTracing(true)
+  .build();
+  ```
+    
+  This option can also be enabled by setting the environment variable
+  `SPANNER_ENABLE_API_TRACING=true`.
+
+  > Note: The attribute keys that are used for additional information about retry attempts and the number of requests might change in a future release.
 
   ## Migrate from OpenCensus to OpenTelemetry