1 files changed, 31 insertions, 0 deletions
diff --git a/db/migrate/20200407182205_create_partitioned_foreign_keys.rb b/db/migrate/20200407182205_create_partitioned_foreign_keys.rb
new file mode 100644
index 00000000000..aca8116d2dd
--- /dev/null
+++ b/db/migrate/20200407182205_create_partitioned_foreign_keys.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+class CreatePartitionedForeignKeys < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  disable_ddl_transaction!
+
+  def up
+    create_table :partitioned_foreign_keys do |t|
+      t.boolean :cascade_delete, null: false, default: true
+      t.text :from_table, null: false
+      t.text :from_column, null: false
+      t.text :to_table, null: false
+      t.text :to_column, null: false
+    end
+
+    add_text_limit :partitioned_foreign_keys, :from_table, 63
+    add_text_limit :partitioned_foreign_keys, :from_column, 63
+    add_text_limit :partitioned_foreign_keys, :to_table, 63
+    add_text_limit :partitioned_foreign_keys, :to_column, 63
+
+    add_index :partitioned_foreign_keys, [:to_table, :from_table, :from_column], unique: true,
+      name: "index_partitioned_foreign_keys_unique_index"
+  end
+
+  def down
+    drop_table :partitioned_foreign_keys
+  end
+end