Session persistence

sql/migrations/patches/20191008190200-sessions/up.sql

@@ -0,0 +1,10 @@
+CREATE TABLE "sessions" (
+    "sid" text NOT NULL COLLATE "default",
+	"session" json NOT NULL,
+    "expires_at" timestamptz NOT NULL,
+    "created_at" timestamptz NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" timestamptz NOT NULL DEFAULT CURRENT_TIMESTAMP
+);
+
+ALTER TABLE "sessions" ADD CONSTRAINT "session_pkey" PRIMARY KEY ("sid") NOT DEFERRABLE INITIALLY IMMEDIATE;
+CREATE TRIGGER "set_sessions_updated" BEFORE UPDATE ON "sessions" FOR EACH ROW EXECUTE PROCEDURE set_updated_timestamp();