"Magnus Hagander" <mha@sollentuna.net> writes:
> Looking at our code, we have the comment:
> /* These flags allow concurrent rename/unlink */
> (FILE_SHARE_READ |
> FILE_SHARE_WRITE | FILE_SHARE_DELETE),
> But I'm not sure that those flags actually guarantee that. They do allow
> concurrent unlink, but not necessarily rename. I read elsewhere that it
> should work, but can't find backing docs on MSDN. Seems it works in most
> cases, but perhaps there are some where it doesn't?
I think there are two different cases involved in rename:
1. Someone has a handle for the file-to-be-renamed;
2. Someone has a handle for the file that is to be deleted (ie currently
has the name being renamed to).
If #2 doesn't work then we've got serious problems. I think though that
#1 can only occur in the context of WAL segment recycling, so we can
probably work around it if that doesn't work.
regards, tom lane