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Date: Fri, 19 Nov 2021 15:27:34 +0300
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Subject: Re: BUG #17288: PSQL bug with COPY command (Windows)
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To: =?UTF-8?Q?Juan_Jos=c3=a9_Santamar=c3=ada_Flecha?=
 <juanjo.santamaria@gmail.com>
Cc: Michael Paquier <michael@paquier.xyz>,
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From: Dmitry Koval <d.koval@postgrespro.ru>
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 >GetFinalPathNameByHandleA() is slower when there is redirection, when
 >there is no redirection it's similar or faster than
 >GetFileInformationByHandle(), and that should be the most common case.

I tested 2 cases:

1) "stdout" is not redirected.
In this case GetFinalPathNameByHandleA() returns error and 
GetFileInformationByHandle() returns error.
Simple test in attachment.
---
Result:
GetFileInformationByHandle: 7, GetFinalPathNameByHandleA: 16

2) "stdout" redirected (need to uncomment 2 lines in test).
Both function works without error.
---
Result (see file "1.txt"):
GetFileInformationByHandle: 34, GetFinalPathNameByHandleA: 120

The difference is not very big, but it is.

With best regards,
Dmitry.
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