Replicate integrations indices for type_new

This recreates all the indices we use for type on type_new, so that
when we start using `type_new` we get identical performance and
consistency guarantees.

Changelog: changed

db/post_migrate/20220213104531_create_indexes_on_integration_type_new.rb

+# frozen_string_literal: true
+
+# Reproduce the indices on integrations.type on integrations.type_new
+class CreateIndexesOnIntegrationTypeNew < Gitlab::Database::Migration[1.0]
+  disable_ddl_transaction!
+
+  TABLE_NAME = :integrations
+  COLUMN = :type_new
+
+  def indices
+    [
+      {
+        name: "index_integrations_on_project_and_#{COLUMN}_where_inherit_null",
+        columns: [:project_id, COLUMN],
+        where: 'inherit_from_id IS NULL'
+      },
+      {
+        name: "index_integrations_on_project_id_and_#{COLUMN}_unique",
+        columns: [:project_id, COLUMN],
+        unique: true
+      },
+      {
+        name: "index_integrations_on_#{COLUMN}",
+        columns: [COLUMN]
+      },
+      {
+        name: "index_integrations_on_#{COLUMN}_and_instance_partial",
+        columns: [COLUMN, :instance],
+        where: 'instance = true'
+      },
+      {
+        name: "index_integrations_on_#{COLUMN}_and_template_partial",
+        columns: [COLUMN, :template],
+        where: 'template = true'
+      },
+      {
+        # column names are limited to 63 characters, so this one is re-worded for clarity
+        name: "index_integrations_on_#{COLUMN}_id_when_active_and_has_project",
+        columns: [COLUMN, :id],
+        where: '((active = true) AND (project_id IS NOT NULL))'
+      },
+      {
+        name: "index_integrations_on_unique_group_id_and_#{COLUMN}",
+        columns: [:group_id, COLUMN]
+      }
+    ]
+  end
+
+  def up
+    indices.each do |index|
+      add_concurrent_index TABLE_NAME, index[:columns], index.except(:columns)
+    end
+  end
+
+  def down
+    indices.each do |index|
+      remove_concurrent_index_by_name TABLE_NAME, index[:name]
+    end
+  end
+end

db/schema_migrations/20220213104531

+9ce8aa469b9469d25fbba52147e24c95f6242c2ab1e114df8baaf5a45268d2fd
\ No newline at end of file

db/structure.sql

@@ -26639,8 +26639,12 @@ CREATE INDEX index_insights_on_project_id ON insights USING btree (project_id);
 
 CREATE INDEX index_integrations_on_inherit_from_id ON integrations USING btree (inherit_from_id);
 
+CREATE INDEX index_integrations_on_project_and_type_new_where_inherit_null ON integrations USING btree (project_id, type_new) WHERE (inherit_from_id IS NULL);
+
 CREATE INDEX index_integrations_on_project_and_type_where_inherit_null ON integrations USING btree (project_id, type) WHERE (inherit_from_id IS NULL);
 
+CREATE UNIQUE INDEX index_integrations_on_project_id_and_type_new_unique ON integrations USING btree (project_id, type_new);
+
 CREATE UNIQUE INDEX index_integrations_on_project_id_and_type_unique ON integrations USING btree (project_id, type);
 
 CREATE INDEX index_integrations_on_template ON integrations USING btree (template);
@@ -26653,8 +26657,18 @@ CREATE UNIQUE INDEX index_integrations_on_type_and_template_partial ON integrati
 
 CREATE INDEX index_integrations_on_type_id_when_active_and_project_id_not_nu ON integrations USING btree (type, id) WHERE ((active = true) AND (project_id IS NOT NULL));
 
+CREATE INDEX index_integrations_on_type_new ON integrations USING btree (type_new);
+
+CREATE INDEX index_integrations_on_type_new_and_instance_partial ON integrations USING btree (type_new, instance) WHERE (instance = true);
+
+CREATE INDEX index_integrations_on_type_new_and_template_partial ON integrations USING btree (type_new, template) WHERE (template = true);
+
+CREATE INDEX index_integrations_on_type_new_id_when_active_and_has_project ON integrations USING btree (type_new, id) WHERE ((active = true) AND (project_id IS NOT NULL));
+
 CREATE UNIQUE INDEX index_integrations_on_unique_group_id_and_type ON integrations USING btree (group_id, type);
 
+CREATE INDEX index_integrations_on_unique_group_id_and_type_new ON integrations USING btree (group_id, type_new);
+
 CREATE INDEX index_internal_ids_on_namespace_id ON internal_ids USING btree (namespace_id);
 
 CREATE INDEX index_internal_ids_on_project_id ON internal_ids USING btree (project_id);