Question

我有一个名为pool_hashrate的表，其中包含以下列：id（PK），hashrate，network_id（FK），pool_id（FK）。我想用查询填充它们：

insert into pool_hashrate (
    hashrate, network_id, pool_id
)
select
    i+i::double precision, i, i
from generate_series(0, 15) AS i;

这些表是通过Hibernate自动生成的。来自pgAdmin的SQL代码片段：

CREATE TABLE public.pool_hashrate
(
    id bigint NOT NULL DEFAULT nextval('pool_hashrate_id_seq'::regclass),
    hashrate double precision NOT NULL,
    network_id bigint NOT NULL,
    pool_id bigint NOT NULL,

    CONSTRAINT pool_hashrate_pkey PRIMARY KEY (id),
    CONSTRAINT fk52n7131wvbi6196idmf1wfb0e FOREIGN KEY (pool_id)
        REFERENCES public.pool_hashrate (id) MATCH SIMPLE
        ON UPDATE NO ACTION
        ON DELETE NO ACTION,
    CONSTRAINT fkjph0cotxu5udghsbbgtpysv66 FOREIGN KEY (network_id)
        REFERENCES public.network_hashrate (id) MATCH SIMPLE
        ON UPDATE NO ACTION
        ON DELETE NO ACTION
)
WITH (
    OIDS = FALSE
)
TABLESPACE pg_default;

ALTER TABLE public.pool_hashrate
    OWNER to postgres;

约束可以成为问题吗？在pgAdmin中执行查询时，我收到rows affected -1消息。

修改

我一直收到错误Null value in column “network_id” violates not-null constraint when adding new item.为什么null被添加到那里，如果它应该是i？

编辑2

事实上，在上述查询之前，我正在运行其他2个查询来填充network_hashrate＆amp; pool_hashrate。这些查询是：

insert into network_hashrate (
    rep_date, hashrate
)
select
    current_timestamp - (s.a || ' hour')::interval,
    s.a::double precision
from generate_series(0, 15, 1) AS s(a);

insert into pool_def (
    name, date_from
)
select
    left(md5(random()::text), 10),
    current_timestamp - (s.a || ' hour')::interval
from generate_series(0, 15, 1) AS s(a);

所以回答你的问题，是的，我确实在network_hashrate中有记录。我猜应该没有问题？

Postgres查询不会填充数据库表。可能的约束干扰？

0 个答案: