Re: How to redirect output from PostgreSQL pg_recvlogical to a file or a pipe? - Mailing list pgsql-general

From Francisco Olarte
Subject Re: How to redirect output from PostgreSQL pg_recvlogical to a file or a pipe?
Date
Msg-id CA+bJJbz_+dZ7cX363T3x+L3H80fNwxcoWCskbMbWY=1zFZyb5g@mail.gmail.com
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In response to How to redirect output from PostgreSQL pg_recvlogical to a file or a pipe?  (David Ventimiglia <davidaventimiglia@hasura.io>)
List pgsql-general
David:

On Fri, 12 Jan 2024 at 20:35, David Ventimiglia
<davidaventimiglia@hasura.io> wrote:
> pg_recvlogical -d postgres --slot test --start -f - >> sample.jsonl
>
> Lest there be any confusion, I already created the slot in an earlier step. Moreover, I can verify that if I omit the
outputredirection >> sample then it does work, insofar as it emits the expected change events when I perform DML in
anotherterminal window. When I include the redirection (or alternatively, set up a pipeline), then nothing happens. 

Have you tested the command as printed ( with -f - ) but without redirection?

Have you ruled out the usual suspect, stdout is line buffered when
going to a tty, full buffered when not ? ( by killing pg_revlogical
and/or insuring a long enough output is generated )

Francisco Olarte.



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