Document index use.

git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@4808 542714f4-19e9-0310-aa3c-eee0fc999fb1

src/java/com/threerings/admin/server/persist/ConfigRecord.java

@@ -67,7 +67,6 @@ public class ConfigRecord extends PersistentRecord
     @Column(name="NODE", length=64)
     public String node;
 
-    /** The code of the stat. */
     @Id
     @Column(name="OBJECT", length=128)
     public String object;

src/java/com/threerings/admin/server/persist/ConfigRepository.java

@@ -52,6 +52,7 @@ public class ConfigRepository extends DepotRepository
         throws PersistenceException
     {
         HashMap<String,String> data = new HashMap<String,String>();
+        // INDEX: Left-most primary key fields.
         Where where = new Where(ConfigRecord.OBJECT_C, object, ConfigRecord.NODE_C, node);
         for (ConfigRecord record : findAll(ConfigRecord.class, where)) {
             data.put(record.field, record.value.toString());

src/java/com/threerings/presents/peer/server/persist/NodeRepository.java

@@ -80,6 +80,7 @@ public class NodeRepository extends DepotRepository
     public void deleteNode (String nodeName)
         throws PersistenceException
     {
+        // INDEX: Full primary key.
         delete(NodeRecord.class, nodeName);
     }