On 2020/06/21 20:33, Josef Šimánek wrote:


po 15. 6. 2020 v 6:39 odesílatel Fujii Masao <masao.fu...@oss.nttdata.com 
<mailto:masao.fu...@oss.nttdata.com>> napsal:



    On 2020/06/14 21:32, Josef Šimánek wrote:
     > Hello, as proposed by Pavel Stěhule and discussed on local czech PostgreSQL 
maillist 
(https://groups.google.com/d/msgid/postgresql-cz/CAFj8pRCZ42CBCa1bPHr7htffSV%2BNAcgcHHG0dVqOog4bsu2LFw%40mail.gmail.com?utm_medium=email&utm_source=footer),
 I have prepared an initial patch for COPY command progress reporting.

    Sounds nice!


     > file - bool - is file is used?
     > program - bool - is program used?

    Are these fields really necessary in a progress view?
    What values are reported when STDOUT/STDIN is specified in COPY command?


For STDOUT and STDIN file is true and program is false.

Could you tell me why these columns are necessary in *progress* view?
If we want to see what copy command is actually running, we can see
pg_stat_activity, instead. For example,

    SELECT pc.*, a.query FROM pg_stat_progress_copy pc, pg_stat_activity a 
WHERE pc.pid = a.pid;


     > file_bytes_processed - amount of bytes processed when file is used 
(otherwise 0), works for both direction (
     > FROM/TO) when file is used (file = t)

    What value is reported when STDOUT/STDIN is specified in COPY command?


For my first patch nothing was reported on STDOUT/STDIN usage. I'll attach new 
patch soon supporting those as well.

Thanks for the patch!

With the patch, pg_stat_progress_copy seems to report the progress of
the processing on file_fdw. Is this intentional?

Regards,

--
Fujii Masao
Advanced Computing Technology Center
Research and Development Headquarters
NTT DATA CORPORATION


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