经过大量搜索，我发现了此答案，它没有直接讨论阅读问题文件，但为我的古代 Postgres 提供了必要的成分。

After much searching, I discovered this answer, which does not directly discuss the problem of reading files, but gave me the necessary ingredient to make this work for my ancient Postgres.

\set contentFill `cat Foo.txt`
\set quoted_contentFill '\'' :contentFill '\''
UPDATE bodycontent SET body=:quoted_contentFill WHERE contentid=12943363; 

自然，如果 Foo中有未转义的引号，则此操作将失败。 txt ，但是我可以轻松地进行预处理以确保没有任何内容。

Naturally, this will fail if there are un-escaped quotes inside Foo.txt, but I can easily preprocess to ensure there are none.