Postgresql Postgres忽略插入错误并继续
我有一个PostgeresDB,具有以下约束:Postgresql Postgres忽略插入错误并继续,postgresql,Postgresql,我有一个PostgeresDB,具有以下约束: CONSTRAINT "Car_Data_3PM_pkey" PRIMARY KEY ("F_ID", "Date"), CONSTRAINT "Car_Data_3PM_F_ID_fkey" FOREIGN KEY ("F_ID") REFERENCES "Bike_Data" ("F_ID") MATCH SIMPLE ON UPDATE NO ACTION ON DELETE NO ACTION 当我尝试使用
CONSTRAINT "Car_Data_3PM_pkey" PRIMARY KEY ("F_ID", "Date"),
CONSTRAINT "Car_Data_3PM_F_ID_fkey" FOREIGN KEY ("F_ID")
REFERENCES "Bike_Data" ("F_ID") MATCH SIMPLE
ON UPDATE NO ACTION ON DELETE NO ACTION
当我尝试使用以下命令插入多个值时:
INSERT INTO "Car_Data_3PM" ("F_ID","Date","Price_Type","O","H","L","LT","EQ","V","NAD") VALUES (38,'2016-10-02 08:19:40.056679','x',0,0,0,112.145,0,0,112.145),(14,'2016-10-02 08:19:40.056679','x',0,0,0,5476,0,0,5476),(13,'2016-10-02
我得到这个错误:
错误:表“Car_Data_3PM”的插入或更新违反外键
约束“Car_Data_3PM_F_ID_fkey”SQL状态:23503详细信息:键
(F_ID)=(38)不在表“自行车数据”中
不插入任何行
我如何才能使Postgres只遗漏约束存在问题的行?i、 e是否插入其中大部分?您不能让Postgres忽略这些值,但您可以重写语句以不插入这些行:
INSERT INTO "Car_Data_3PM" ("F_ID","Date","Price_Type","O","H","L","LT","EQ","V","NAD")
select *
from (
VALUES
(38,'2016-10-02 08:19:40.056679','x',0,0,0,112.145,0,0,112.145),
(14,'2016-10-02 08:19:40.056679','x',0,0,0,5476,0,0,5476),
... -- all other rows
) as x (id, date, price_type, o, h, l, lt, eq, v nad)
where exists (select 1
from "Bike_Data" bd
where bd."F_ID" = x .id)
您不能让Postgres忽略这些值,但可以重写语句以不插入这些行:
INSERT INTO "Car_Data_3PM" ("F_ID","Date","Price_Type","O","H","L","LT","EQ","V","NAD")
select *
from (
VALUES
(38,'2016-10-02 08:19:40.056679','x',0,0,0,112.145,0,0,112.145),
(14,'2016-10-02 08:19:40.056679','x',0,0,0,5476,0,0,5476),
... -- all other rows
) as x (id, date, price_type, o, h, l, lt, eq, v nad)
where exists (select 1
from "Bike_Data" bd
where bd."F_ID" = x .id)
一种方法是编写一个触发器来过滤坏值,如下所示:
CREATE FUNCTION car_insert_filter() RETURNS trigger
LANGUAGE plpgsql AS
$$BEGIN
IF EXISTS(SELECT 1 FROM "Bike_Data" WHERE "F_ID" = NEW."F_ID")
THEN
RETURN NEW;
ELSE
RAISE NOTICE 'Skipping row with "F_ID"=% and "Date"=%',
NEW."F_ID", NEW."Date";
RETURN NULL;
END IF;
END;$$;
CREATE TRIGGER car_insert_filter
BEFORE INSERT ON "Car_Data_3PM" FOR EACH ROW
EXECUTE PROCEDURE car_insert_filter();
一种方法是编写一个触发器来过滤坏值,如下所示:
CREATE FUNCTION car_insert_filter() RETURNS trigger
LANGUAGE plpgsql AS
$$BEGIN
IF EXISTS(SELECT 1 FROM "Bike_Data" WHERE "F_ID" = NEW."F_ID")
THEN
RETURN NEW;
ELSE
RAISE NOTICE 'Skipping row with "F_ID"=% and "Date"=%',
NEW."F_ID", NEW."Date";
RETURN NULL;
END IF;
END;$$;
CREATE TRIGGER car_insert_filter
BEFORE INSERT ON "Car_Data_3PM" FOR EACH ROW
EXECUTE PROCEDURE car_insert_filter();
不相关,但是:您应该真正避免引用标识符。它们比它们值得的麻烦多得多。不相关,但是:你真的应该避免引用标识符。他们比他们值得的麻烦多。