1 files changed, 21 insertions, 0 deletions
diff --git a/db/post_migrate/20230712055956_drop_index_deployments_on_environment_id_and_iid_and_project_id.rb b/db/post_migrate/20230712055956_drop_index_deployments_on_environment_id_and_iid_and_project_id.rb
new file mode 100644
index 00000000000..52a02e68d14
--- /dev/null
+++ b/db/post_migrate/20230712055956_drop_index_deployments_on_environment_id_and_iid_and_project_id.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+# See https://docs.gitlab.com/ee/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class DropIndexDeploymentsOnEnvironmentIdAndIidAndProjectId < Gitlab::Database::Migration[2.1]
+  INDEX_NAME = 'index_deployments_on_environment_id_and_iid_and_project_id'
+
+  disable_ddl_transaction!
+
+  def up
+    remove_concurrent_index_by_name :deployments, name: INDEX_NAME
+  end
+
+  def down
+    # This is based on the following `CREATE INDEX` command in db/init_structure.sql:
+    # CREATE INDEX index_deployments_on_environment_id_and_iid_and_project_id ON deployments
+    #   USING btree (environment_id, iid, project_id);
+    add_concurrent_index :deployments, %i[environment_id iid project_id], name: INDEX_NAME
+  end
+end