Can I access 32 bit postgres database with 64 bit postgres application?

Question

如果不执行转储和还原操作，我可以使用具有64位postgres可执行文件的现有32位postgres数据库吗？

Answer 1

Yes. The client and server communicate via tcp/ip.

If you use the libpq binary protocol you have to be aware of type sizes, but otherwise it makes no difference.

You must make sure the client has the correct architecture libpq / psqlODBC / whatever client driver you are using. It must be the architecture of the client app, not the server.