RoundcubeMail/SQL/postgres/2018122300.sql

ALTER TABLE "filestore" ADD COLUMN context varchar(32) NOT NULL;
UPDATE "filestore" SET context = 'enigma';
ALTER TABLE "filestore" DROP CONSTRAINT "filestore_user_id_filename";
ALTER TABLE "filestore" ADD CONSTRAINT "filestore_user_id_context_filename" UNIQUE (user_id, context, filename);