Re: Cygwin PostgreSQL Regression Test Problems

Tom,

On Thu, Jan 18, 2001 at 12:59:00PM -0500, Tom Lane wrote:
> In current sources I think that you'd get a "cannot unlink" NOTICE,
> but the table would get logically dropped anyway, and the sole
> side-effect would be failure to recover the disk space. But in this
> case we could be talking about large amounts of disk space.

Cygwin does attempt to overcome the Windows open file issue. If a sharing
violation is detected (i.e., the file is open) during an unlink operation
(really DeleteFile), Cygwin will queue it for deletion later. However,
reading the Cygwin code, I found the following:

/* FIXME: this delqueue module is very flawed and should be rewritten.
First, having an array of a fixed size for keeping track of the
unlinked but not yet deleted files is bad. Second, some programs
will unlink files and then create a new one in the same location
and this behavior is not supported in the current code. Probably
we should find a move/rename function that will work on open files,
and move delqueue files to some special location or some such
hack... */

With the above caveats, is the current functionality sufficient for
PostgreSQL's needs?

Thanks
Jason

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Jason Tishler
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