PostgreSQL：“用户”处或附近的语法错误。 [英] Postgresql: syntax error at or near "user"

问题描述

这可能是一个简单的问题，但我花了很长时间才能找出问题所在。

This is probably a simple question, but I've spent an embarrassing amount of time trying to figure out what's wrong.

我正在尝试运行查询在包含两列用户名和ID的表用户上。

I'm trying to run a query on a table "user" containing two columns username and id.

INSERT INTO user
   (username, id) 
VALUES
   ("user", 2)

我最终遇到此错误。

ERROR:  syntax error at or near "user"
LINE 1: INSERT INTO user
                    ^
********** Error **********

ERROR: syntax error at or near "user"
SQL state: 42601
Character: 13

此处是供参考的表创建

-- Table: public."user"

-- DROP TABLE public."user";

CREATE TABLE public."user"
(
    id integer NOT NULL,
    username text COLLATE pg_catalog."default",
    CONSTRAINT user_pkey PRIMARY KEY (id)
)
WITH (
    OIDS = FALSE
)
TABLESPACE pg_default;

ALTER TABLE public."user"
    OWNER to postgres;

推荐答案

在Postgres 用户中是保留的SQL关键字。您应该避免使用保留关键字来命名表。作为一种解决方法，您可以在引用表名时将其放在双引号中：

In Postgres user is a reserved SQL keyword. You should avoid naming your tables using reserved keywords. As a workaround here, you can place your table name in double quotes when referring to it:

INSERT INTO "user"
   (username, id) 
VALUES
   ('user', 2)

我也切换为字符串文字使用单引号。这有助于区分双引号和单引号的使用。

I also switched to using single quotes for string literals. This helps to distinguish the use of double quotes from single ones.

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