Add link about datastore indexing in docs

Ajay Kannan · Ajay Kannan · commit 8808c54c09a1 · 2015-11-23T19:38:37.000-08:00
diff --git a/gcloud-java-datastore/README.md b/gcloud-java-datastore/README.md
@@ -128,6 +128,8 @@ while (results.hasNext()) {
 }
 ```
 
+Cloud Datastore relies on indexing to run queries. Indexing is turned on by default for most types of properties. To read more about indexing, see the [Cloud Datastore Index Configuration documentation](https://cloud.google.com/datastore/docs/tools/indexconfig).
+
 #### Complete source code
 
 Here we put together all the code shown above into one program.  This program assumes that you are running on Compute Engine or from your own desktop. To run this example on App Engine, simply move the code from the main method to your application's servlet class.
diff --git a/gcloud-java-datastore/src/main/java/com/google/gcloud/datastore/Query.java b/gcloud-java-datastore/src/main/java/com/google/gcloud/datastore/Query.java
@@ -35,6 +35,10 @@
  * A Google Cloud Datastore query.
  * For usage examples see {@link GqlQuery} and {@link StructuredQuery}.
  *
+ * Note that queries require proper indexing. See
+ * <a href="https://cloud.google.com/datastore/docs/tools/indexconfig">
+ * Cloud Datastore Index Configuration</a> for help configuring indexes.
+ *
  * @param <V> the type of the values returned by this query.
  * @see <a href="https://cloud.google.com/datastore/docs/concepts/queries">Datastore Queries</a>
  */

Original file line number	Diff line number	Diff line change
`@@ -128,6 +128,8 @@ while (results.hasNext()) {`
`128`	`128`	`}`
`129`	`129`	```
`130`	`130`
	`131`	`+Cloud Datastore relies on indexing to run queries. Indexing is turned on by default for most types of properties. To read more about indexing, see the [Cloud Datastore Index Configuration documentation](https://cloud.google.com/datastore/docs/tools/indexconfig).`
	`132`	`+`
`131`	`133`	`#### Complete source code`
`132`	`134`
`133`	`135`	`Here we put together all the code shown above into one program. This program assumes that you are running on Compute Engine or from your own desktop. To run this example on App Engine, simply move the code from the main method to your application's servlet class.`