Add an index on Host.host_name column (#1510)

* Add an index on Host.host_name column

This field is queried during host creation and needs an index to speed
up the query.

Since Hibernate does not explicitly refer to indexes, we can change the
code and schema in one PR.

core/src/main/java/google/registry/model/host/HostResource.java

@@ -34,6 +34,9 @@ import javax.persistence.AccessType;
 @ReportedOn
 @Entity
 @javax.persistence.Entity(name = "Host")
+@javax.persistence.Table(
+    name = "Host",
+    indexes = {@javax.persistence.Index(columnList = "hostName")})
 @ExternalMessagingName("host")
 @WithStringVKey
 @Access(AccessType.FIELD) // otherwise it'll use the default if the repoId (property)

db/src/main/resources/sql/er_diagram/full_er_diagram.html

@@ -261,19 +261,11 @@ td.section {
     </tr> 
     <tr> 
      <td class="property_name">generated on</td> 
-<<<<<<< HEAD
+     <td class="property_value">2022-02-03 18:23:54.985476</td> 
-     <td class="property_value">2021-11-23 20:43:39.672931</td> 
     </tr> 
     <tr>
      <td class="property_name">last flyway file</td>
-     <td id="lastFlywayFile" class="property_value">V104__add_transfer_response_host_id_to_poll_message.sql</td>
+     <td id="lastFlywayFile" class="property_value">V105__add_index_on_host_name_in_host_table.sql</td>
-=======
-     <td class="property_value">2021-11-17 21:23:10.198048</td> 
-    </tr> 
-    <tr>
-     <td class="property_name">last flyway file</td>
-     <td id="lastFlywayFile" class="property_value">V103__add_transfer_response_host_id_to_poll_message.sql</td>
->>>>>>> 19aa29939 (Fix missing hostPendingActionNotificationResponses in PollMessage.OneTime)
     </tr>
    </tbody>
   </table> 
@@ -292,11 +284,7 @@ td.section {
      generated on
     </text> 
     <text text-anchor="start" x="4755.52" y="-10.8" font-family="Helvetica,sans-Serif" font-size="14.00">
-<<<<<<< HEAD
+     2022-02-03 18:23:54.985476
-     2021-11-23 20:43:39.672931
-=======
-     2021-11-17 21:23:10.198048
->>>>>>> 19aa29939 (Fix missing hostPendingActionNotificationResponses in PollMessage.OneTime)
     </text> 
     <polygon fill="none" stroke="#888888" points="4668.02,-4 4668.02,-44 4933.02,-44 4933.02,-4 4668.02,-4" /> <!-- allocationtoken_a08ccbef --> 
     <g id="node1" class="node"> 
@@ -11179,6 +11167,18 @@ td.section {
     <tr> 
      <td colspan="3"></td> 
     </tr> 
+    <tr> 
+     <td colspan="2" class="name">idxkpkh68n6dy5v51047yr6b0e9l</td> 
+     <td class="description right">[non-unique index]</td> 
+    </tr> 
+    <tr> 
+     <td class="spacer"></td> 
+     <td class="minwidth">host_name</td> 
+     <td class="minwidth">ascending</td> 
+    </tr> 
+    <tr> 
+     <td colspan="3"></td> 
+    </tr> 
     <tr> 
      <td colspan="2" class="name">Host_pkey</td> 
      <td class="description right">[unique index]</td> 

db/src/main/resources/sql/flyway.txt

@@ -102,3 +102,4 @@ V101__domain_add_dns_refresh_request_time.sql
 V102__add_indexes_to_domain_history_sub_tables.sql
 V103__creation_time_not_null.sql
 V104__add_transfer_response_host_id_to_poll_message.sql
+V105__add_index_on_host_name_in_host_table.sql

db/src/main/resources/sql/flyway/V105__add_index_on_host_name_in_host_table.sql

@@ -0,0 +1,15 @@
+-- Copyright 2022 The Nomulus Authors. All Rights Reserved.
+--
+-- Licensed under the Apache License, Version 2.0 (the "License");
+-- you may not use this file except in compliance with the License.
+-- You may obtain a copy of the License at
+--
+--     http://www.apache.org/licenses/LICENSE-2.0
+--
+-- Unless required by applicable law or agreed to in writing, software
+-- distributed under the License is distributed on an "AS IS" BASIS,
+-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+-- See the License for the specific language governing permissions and
+-- limitations under the License.
+
+CREATE INDEX IDXkpkh68n6dy5v51047yr6b0e9l ON "Host" (host_name);

db/src/main/resources/sql/schema/db-schema.sql.generated

@@ -804,6 +804,7 @@ create index IDX6w3qbtgce93cal2orjg1tw7b7 on "DomainHistory" (history_modificati
        add constraint UKat9erbh52e4lg3jw6ai9wkjj9 unique (domain_repo_id, host_repo_id);
 create index IDXj1mtx98ndgbtb1bkekahms18w on "GracePeriod" (domain_repo_id);
 create index IDXd01j17vrpjxaerxdmn8bwxs7s on "GracePeriodHistory" (domain_repo_id);
+create index IDXkpkh68n6dy5v51047yr6b0e9l on "Host" (host_name);
 create index IDXfg2nnjlujxo6cb9fha971bq2n on "HostHistory" (creation_time);
 create index IDX1iy7njgb7wjmj9piml4l2g0qi on "HostHistory" (history_registrar_id);
 create index IDXkkwbwcwvrdkkqothkiye4jiff on "HostHistory" (host_name);

db/src/main/resources/sql/schema/nomulus.golden.sql

@@ -1728,6 +1728,13 @@ CREATE INDEX idxkjt9yaq92876dstimd93hwckh ON public."Domain" USING btree (curren
 CREATE INDEX idxknk8gmj7s47q56cwpa6rmpt5l ON public."HostHistory" USING btree (history_type);
 
 
+--
+-- Name: idxkpkh68n6dy5v51047yr6b0e9l; Type: INDEX; Schema: public; Owner: -
+--
+
+CREATE INDEX idxkpkh68n6dy5v51047yr6b0e9l ON public."Host" USING btree (host_name);
+
+
 --
 -- Name: idxlrq7v63pc21uoh3auq6eybyhl; Type: INDEX; Schema: public; Owner: -
 --