Add more hash indexes used during common flows (#2845)

I analyzed SQL statements run during the following flows and EXPLAIN
ANALYZEd each of them to figure out if there are any additional hash
indexes we could add that could be particularly helpful. Note: it's not
worth adding a hash index on the host_repo_id field in DomainHost
because so many rows (domains) use the same host.

- domain create
- domain delete
- domain info
- domain renew
- domain update
- host create
- host delete
- host update

I skipped the ones that use the read-only replica, as well as contact
flows (we're getting rid of them), and domain transfer/restore-related
flows as those are extremely infrequent.

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

@@ -261,11 +261,11 @@ td.section {
     </tr>
     <tr>
      <td class="property_name">generated on</td>
-     <td class="property_value">2025-09-29 21:19:42</td>
+     <td class="property_value">2025-10-10 17:24:50</td>
     </tr>
     <tr>
      <td class="property_name">last flyway file</td>
-     <td id="lastFlywayFile" class="property_value">V209__poll_message_hash.sql</td>
+     <td id="lastFlywayFile" class="property_value">V213__graceperiodhistory_history_revision_id_hash.sql</td>
     </tr>
    </tbody>
   </table>
@@ -273,7 +273,7 @@ td.section {
   <p>&nbsp;</p>
   <svg viewBox="0.00 0.00 4903.00 3732.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" id="erDiagram" style="overflow: hidden; width: 100%; height: 800px">
    <g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 3728)">
-    <title>SchemaCrawler_Diagram</title> <polygon fill="white" stroke="transparent" points="-4,4 -4,-3728 4899,-3728 4899,4 -4,4" /> <text text-anchor="start" x="4655" y="-29.8" font-family="Helvetica,sans-Serif" font-size="14.00">generated by</text> <text text-anchor="start" x="4738" y="-29.8" font-family="Helvetica,sans-Serif" font-size="14.00">SchemaCrawler 16.27.1</text> <text text-anchor="start" x="4654" y="-10.8" font-family="Helvetica,sans-Serif" font-size="14.00">generated on</text> <text text-anchor="start" x="4738" y="-10.8" font-family="Helvetica,sans-Serif" font-size="14.00">2025-09-29 21:19:42</text> <polygon fill="none" stroke="#888888" points="4651,-4 4651,-44 4887,-44 4887,-4 4651,-4" /> <!-- allocationtoken_a08ccbef -->
+    <title>SchemaCrawler_Diagram</title> <polygon fill="white" stroke="transparent" points="-4,4 -4,-3728 4899,-3728 4899,4 -4,4" /> <text text-anchor="start" x="4655" y="-29.8" font-family="Helvetica,sans-Serif" font-size="14.00">generated by</text> <text text-anchor="start" x="4738" y="-29.8" font-family="Helvetica,sans-Serif" font-size="14.00">SchemaCrawler 16.27.1</text> <text text-anchor="start" x="4654" y="-10.8" font-family="Helvetica,sans-Serif" font-size="14.00">generated on</text> <text text-anchor="start" x="4738" y="-10.8" font-family="Helvetica,sans-Serif" font-size="14.00">2025-10-10 17:24:50</text> <polygon fill="none" stroke="#888888" points="4651,-4 4651,-44 4887,-44 4887,-4 4651,-4" /> <!-- allocationtoken_a08ccbef -->
     <g id="node1" class="node">
      <title>allocationtoken_a08ccbef</title> <polygon fill="#e9c2f2" stroke="transparent" points="481.5,-978 481.5,-997 667.5,-997 667.5,-978 481.5,-978" /> <text text-anchor="start" x="483.5" y="-984.8" font-family="Helvetica,sans-Serif" font-weight="bold" font-style="italic" font-size="14.00">public."AllocationToken"</text> <polygon fill="#e9c2f2" stroke="transparent" points="667.5,-978 667.5,-997 741.5,-997 741.5,-978 667.5,-978" /> <text text-anchor="start" x="702.5" y="-983.8" font-family="Helvetica,sans-Serif" font-size="14.00">[table]</text> <text text-anchor="start" x="483.5" y="-965.8" font-family="Helvetica,sans-Serif" font-weight="bold" font-style="italic" font-size="14.00">token</text> <text text-anchor="start" x="661.5" y="-964.8" font-family="Helvetica,sans-Serif" font-size="14.00"> </text> <text text-anchor="start" x="669.5" y="-964.8" font-family="Helvetica,sans-Serif" font-size="14.00">text not null</text> <text text-anchor="start" x="483.5" y="-945.8" font-family="Helvetica,sans-Serif" font-size="14.00">domain_name</text> <text text-anchor="start" x="661.5" y="-945.8" font-family="Helvetica,sans-Serif" font-size="14.00"> </text> <text text-anchor="start" x="669.5" y="-945.8" font-family="Helvetica,sans-Serif" font-size="14.00">text</text> <text text-anchor="start" x="483.5" y="-926.8" font-family="Helvetica,sans-Serif" font-size="14.00">redemption_domain_repo_id</text> <text text-anchor="start" x="661.5" y="-926.8" font-family="Helvetica,sans-Serif" font-size="14.00"> </text> <text text-anchor="start" x="669.5" y="-926.8" font-family="Helvetica,sans-Serif" font-size="14.00">text</text> <text text-anchor="start" x="483.5" y="-907.8" font-family="Helvetica,sans-Serif" font-size="14.00">token_type</text> <text text-anchor="start" x="661.5" y="-907.8" font-family="Helvetica,sans-Serif" font-size="14.00"> </text> <text text-anchor="start" x="669.5" y="-907.8" font-family="Helvetica,sans-Serif" font-size="14.00">text</text> <polygon fill="none" stroke="#888888" points="480.5,-901.5 480.5,-998.5 742.5,-998.5 742.5,-901.5 480.5,-901.5" />
     </g>

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

@@ -207,3 +207,7 @@ V206__grace_period_hash.sql
 V207__grace_period_history_hash.sql
 V208__host_hash.sql
 V209__poll_message_hash.sql
+V210__allocationtoken_token_hash.sql
+V211__domainhistoryhost_history_revision_id_hash.sql
+V212__domaindsdatahistory_history_revision_id_hash.sql
+V213__graceperiodhistory_history_revision_id_hash.sql

db/src/main/resources/sql/flyway/V210__allocationtoken_token_hash.sql

@@ -0,0 +1,16 @@
+-- Copyright 2025 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.
+
+-- Add hash indexes on columns that are commonly queried with a direct equals
+CREATE INDEX CONCURRENTLY IF NOT EXISTS allocationtoken_token_hash ON "AllocationToken" USING hash (token);

db/src/main/resources/sql/flyway/V211__domainhistoryhost_history_revision_id_hash.sql

@@ -0,0 +1,17 @@
+-- Copyright 2025 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.
+
+-- Add hash indexes on columns that are commonly queried with a direct equals
+CREATE INDEX CONCURRENTLY IF NOT EXISTS domainhistoryhost_domain_history_history_revision_id_hash ON "DomainHistoryHost"
+  USING hash (domain_history_history_revision_id);

db/src/main/resources/sql/flyway/V212__domaindsdatahistory_history_revision_id_hash.sql

@@ -0,0 +1,17 @@
+-- Copyright 2025 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.
+
+-- Add hash indexes on columns that are commonly queried with a direct equals
+CREATE INDEX CONCURRENTLY IF NOT EXISTS domaindsdatahistory_domain_history_revision_id_hash ON "DomainDsDataHistory"
+  USING hash (domain_history_revision_id);

db/src/main/resources/sql/flyway/V213__graceperiodhistory_history_revision_id_hash.sql

@@ -0,0 +1,17 @@
+-- Copyright 2025 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.
+
+-- Add hash indexes on columns that are commonly queried with a direct equals
+CREATE INDEX CONCURRENTLY IF NOT EXISTS graceperiodhistory_domain_history_revision_id_hash ON "GracePeriodHistory" USING
+  hash (domain_history_revision_id);

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

@@ -1924,6 +1924,13 @@ ALTER TABLE ONLY public."User"
 CREATE INDEX allocation_token_domain_name_idx ON public."AllocationToken" USING btree (domain_name);
 
 
+--
+-- Name: allocationtoken_token_hash; Type: INDEX; Schema: public; Owner: -
+--
+
+CREATE INDEX allocationtoken_token_hash ON public."AllocationToken" USING hash (token);
+
+
 --
 -- Name: billingcancellation_billing_cancellation_id_hash; Type: INDEX; Schema: public; Owner: -
 --
@@ -1980,6 +1987,13 @@ CREATE INDEX domain_history_to_ds_data_history_idx ON public."DomainDsDataHistor
 CREATE INDEX domain_history_to_transaction_record_idx ON public."DomainTransactionRecord" USING btree (domain_repo_id, history_revision_id);
 
 
+--
+-- Name: domaindsdatahistory_domain_history_revision_id_hash; Type: INDEX; Schema: public; Owner: -
+--
+
+CREATE INDEX domaindsdatahistory_domain_history_revision_id_hash ON public."DomainDsDataHistory" USING hash (domain_history_revision_id);
+
+
 --
 -- Name: domainhistory_domain_repo_id_hash; Type: INDEX; Schema: public; Owner: -
 --
@@ -1994,6 +2008,13 @@ CREATE INDEX domainhistory_domain_repo_id_hash ON public."DomainHistory" USING h
 CREATE INDEX domainhistory_history_revision_id_hash ON public."DomainHistory" USING hash (history_revision_id);
 
 
+--
+-- Name: domainhistoryhost_domain_history_history_revision_id_hash; Type: INDEX; Schema: public; Owner: -
+--
+
+CREATE INDEX domainhistoryhost_domain_history_history_revision_id_hash ON public."DomainHistoryHost" USING hash (domain_history_history_revision_id);
+
+
 --
 -- Name: domainhost_domain_repo_id_hash; Type: INDEX; Schema: public; Owner: -
 --
@@ -2029,6 +2050,13 @@ CREATE INDEX graceperiod_domain_repo_id_hash ON public."GracePeriod" USING hash
 CREATE INDEX graceperiod_grace_period_id_hash ON public."GracePeriod" USING hash (grace_period_id);
 
 
+--
+-- Name: graceperiodhistory_domain_history_revision_id_hash; Type: INDEX; Schema: public; Owner: -
+--
+
+CREATE INDEX graceperiodhistory_domain_history_revision_id_hash ON public."GracePeriodHistory" USING hash (domain_history_revision_id);
+
+
 --
 -- Name: graceperiodhistory_grace_period_history_revision_id_hash; Type: INDEX; Schema: public; Owner: -
 --