In my recent experience, it's possible to get this error when the real problem has nothing to do with escape characters or newlines. In my case, I had created a dump from database A with pg_dump -a -t table_name > dump.sql and was trying to restore it to database B with psql < dump.sql (after updating the proper env vars, of course) What I finally figured out was that the dump, though it was data-only (the -a option, so that the table structure isn't explicitly part of the dump), was schema-specific. That meant that without manually modifying the dump, I couldn't use a dump generated from schema1.table_name to populate schema2.table_name. Manually modifying the dump was easy, the schema is specified in the first 15 lines or so.

我有同样的问题，我创建了一个新的数据库，并得到无效的命令\N恢复与psql。 我通过设置与旧数据库相同的表空间来解决这个问题。

例如，旧数据库备份有表空间“pg_default”，我给新数据库定义了相同的表空间，上面的错误已经消失了!

对于我在SUSE 12上使用postgreSQL 10，我通过增加磁盘空间解决了无效命令\N错误。磁盘空间不足导致了我的错误。如果查看df -h输出中数据将要进入的文件系统，就可以判断是否耗尽了磁盘空间。如果文件系统/mount的使用率为100%，在执行类似psql -f db. mount的操作后。对于postgres(请参阅https://www.postgresql.org/docs/current/static/app-pg-dumpall.html)，您可能需要增加可用的磁盘空间。

可以使用INSERTS语句和——INSERTS参数生成转储。

当我试图从二进制pg_dump恢复时，我收到了相同的错误消息。我简单地使用pg_restore来恢复我的转储，并完全避免\N错误，例如。

pg_restore -c -F t -F your.backup.tar

开关说明:

-f, --file=FILENAME      output file name
-F, --format=c|d|t       backup file format (should be automatic)
-c, --clean              clean (drop) database objects before recreating

我知道这是一个旧帖子，但我遇到了另一个解决方案:postgis没有安装在我的新版本上，这导致我在pg_dump上出现同样的错误