postgresql中的字符串文字和转义字符

问题描述：

尝试将转义字符插入到表中会导致警告。

Attempting to insert an escape character into a table results in a warning.

例如：

create table EscapeTest (text varchar(50));

insert into EscapeTest (text) values ('This is the first part \n And this is the second');

产生警告：

WARNING:  nonstandard use of escape in a string literal

（使用PSQL 8.2 ）

任何人都知道如何解决这个问题？

Anyone know how to get around this?

答

部分。文本被插入，但是警告仍然被生成。

Partially. The text is inserted, but the warning is still generated.

我发现一个讨论，表明文本需要在'E'之前，因此：

I found a discussion that indicated the text needed to be preceded with 'E', as such:

insert into EscapeTest (text) values (E'This is the first part \n And this is the second');

这样可以抑制警告，但文本仍未正确返回。当我按照迈克尔的建议添加额外的斜线时，它的工作正常。

This suppressed the warning, but the text was still not being returned correctly. When I added the additional slash as Michael suggested, it worked.

因此：

insert into EscapeTest (text) values (E'This is the first part \\n And this is the second');