Add active_and_visible index on tasks

app/src/main/java/com/todoroo/astrid/dao/Database.java

@@ -58,7 +58,7 @@ import org.tasks.notifications.NotificationDao;
       CaldavAccount.class,
       GoogleTaskAccount.class
     },
-    version = 67)
+    version = 68)
 public abstract class Database extends RoomDatabase {
 
   public static final String NAME = "database";

app/src/main/java/com/todoroo/astrid/data/Task.java

@@ -36,12 +36,14 @@ import org.tasks.data.Tag;
 import org.tasks.time.DateTime;
 import timber.log.Timber;
 
-/**
- * Data Model which represents a task users need to accomplish.
- *
- * @author Tim Su <tim@todoroo.com>
- */
-@Entity(tableName = "tasks", indices = @Index(name = "t_rid", value = "remoteId", unique = true))
+@Entity(
+    tableName = "tasks",
+    indices = {
+      @Index(name = "t_rid", value = "remoteId", unique = true),
+      @Index(
+          name = "active_and_visible",
+          value = {"completed", "deleted", "hideUntil"})
+    })
 public class Task implements Parcelable {
 
   // --- table and uri

app/src/main/java/org/tasks/db/Migrations.java

@@ -338,6 +338,15 @@ public class Migrations {
         }
       };
 
+  private static final Migration MIGRATION_67_68 =
+      new Migration(67, 68) {
+        @Override
+        public void migrate(@NonNull SupportSQLiteDatabase database) {
+          database.execSQL(
+              "CREATE INDEX `active_and_visible` ON `tasks` (`completed`, `deleted`, `hideUntil`)");
+        }
+      };
+
   public static final Migration[] MIGRATIONS =
       new Migration[] {
         MIGRATION_35_36,
@@ -362,7 +371,8 @@ public class Migrations {
         MIGRATION_63_64,
         MIGRATION_64_65,
         MIGRATION_65_66,
-        MIGRATION_66_67
+        MIGRATION_66_67,
+        MIGRATION_67_68
       };
 
   private static Migration NOOP(int from, int to) {