Database migrations for AuditEvent#target_details

This is the database-side of
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/36567.

changelogs/unreleased/220325-target_details_refactor.yml

+---
+title: Add target_details column to AuditEvent table
+merge_request: 37430
+author:
+type: changed

db/migrate/20200715124210_add_target_details_to_audit_event.rb

+# frozen_string_literal: true
+
+class AddTargetDetailsToAuditEvent < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  def up
+    with_lock_retries do
+      # rubocop:disable Migration/AddLimitToTextColumns
+      add_column(:audit_events, :target_details, :text)
+      # rubocop:enable Migration/AddLimitToTextColumns
+    end
+  end
+
+  def down
+    with_lock_retries do
+      remove_column(:audit_events, :target_details)
+    end
+  end
+end

db/migrate/20200716145156_add_text_limit_to_audit_event_target_details.rb

+# frozen_string_literal: true
+
+class AddTextLimitToAuditEventTargetDetails < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    add_text_limit :audit_events, :target_details, 5_500
+  end
+
+  def down
+    remove_text_limit :audit_events, :target_details
+  end
+end

db/structure.sql

@@ -9400,8 +9400,10 @@ CREATE TABLE public.audit_events (
     ip_address inet,
     author_name text,
     entity_path text,
+    target_details text,
     CONSTRAINT check_492aaa021d CHECK ((char_length(entity_path) <= 5500)),
-    CONSTRAINT check_83ff8406e2 CHECK ((char_length(author_name) <= 255))
+    CONSTRAINT check_83ff8406e2 CHECK ((char_length(author_name) <= 255)),
+    CONSTRAINT check_d493ec90b5 CHECK ((char_length(target_details) <= 5500))
 );
 
 CREATE SEQUENCE public.audit_events_id_seq
@@ -23987,10 +23989,12 @@ COPY "schema_migrations" (version) FROM STDIN;
 20200713071042
 20200713141854
 20200713152443
+20200715124210
 20200715135130
 20200715202659
 20200716044023
 20200716120419
+20200716145156
 20200718040100
 20200718040200
 20200718040300