1 files changed, 44 insertions, 0 deletions
diff --git a/db/migrate/20210422195929_create_elastic_reindexing_slices.rb b/db/migrate/20210422195929_create_elastic_reindexing_slices.rb
new file mode 100644
index 00000000000..a535402186c
--- /dev/null
+++ b/db/migrate/20210422195929_create_elastic_reindexing_slices.rb
@@ -0,0 +1,44 @@
+# frozen_string_literal: true
+
+class CreateElasticReindexingSlices < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  disable_ddl_transaction!
+
+  class ReindexingSubtask < ActiveRecord::Base
+    self.table_name = 'elastic_reindexing_subtasks'
+  end
+
+  class ReindexingSlice < ActiveRecord::Base
+    self.table_name = 'elastic_reindexing_slices'
+  end
+
+  def up
+    unless table_exists?(:elastic_reindexing_slices)
+      create_table_with_constraints :elastic_reindexing_slices do |t|
+        t.timestamps_with_timezone null: false
+        t.references :elastic_reindexing_subtask, foreign_key: { on_delete: :cascade }, null: false, index: { name: 'idx_elastic_reindexing_slices_on_elastic_reindexing_subtask_id' }
+        t.integer :elastic_slice, null: false, limit: 2, default: 0
+        t.integer :elastic_max_slice, null: false, limit: 2, default: 0
+        t.integer :retry_attempt, null: false, limit: 2, default: 0
+        t.text :elastic_task
+
+        t.text_limit :elastic_task, 255
+      end
+    end
+
+    ReindexingSubtask.find_each do |subtask|
+      next if ReindexingSlice.where(elastic_reindexing_subtask_id: subtask.id).exists?
+
+      ReindexingSlice.create(
+        elastic_reindexing_subtask_id: subtask.id,
+        elastic_task: subtask.elastic_task,
+        retry_attempt: 0
+      )
+    end
+  end
+
+  def down
+    drop_table :elastic_reindexing_slices
+  end
+end