编译前的准备工作

1. 把stdx的动态链接库路径指定为环境变量CANGJIE_STDX_DYNAMIC_PATH
2. 执行以下命令

export CANGJIE_STDX_PATH=$CANGJIE_STDX_DYNAMIC_PATH
export POSTGRES=url_of_postgres

CREATE TABLE public.user_info (
	id int8 GENERATED BY DEFAULT AS IDENTITY( INCREMENT BY 1 MINVALUE 1 MAXVALUE 9223372036854775807 START 1 CACHE 1 NO CYCLE) NOT NULL,
	username varchar(32) DEFAULT ''::character varying NOT NULL,
	"password" varchar(24) DEFAULT ''::character varying NOT NULL,
	save_time timestamptz DEFAULT now() NULL,
	CONSTRAINT user_info_pkey PRIMARY KEY (id),
	CONSTRAINT user_info_username_key UNIQUE (username)
);