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I am running a number of PostgreSQL scripts that used to produce excessive log output. I managed to reduce most of the output to an acceptable amount by passing --quiet as parameter to the psql command line client and adding SET client_min_messages='warning'; to the beginning of my SQL scripts.

This works fine for most basic statements like SELECT, INSERT, UPDATE, etc.) However, when I call a stored function in a script using e.g. SELECT my_func(my_args);, there is still log output similar to


(omitted a long with many '-' here because SF thinks that's a headline)

(1 row)

The output is useless; it only makes me having to scroll back up a long way after the script has run and also makes it much harder than necessary to spot any relevant error output.

How can I get rid of it ?

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up vote 1 down vote accepted

Since you seem to be running the script from psql, you could do

copy ( select my_func(my_args) ) to stdout;

or even

\copy ( select my_func(my_args) ) to /dev/null

You could specify "-A -t" on the psql command line to globally quieten the output of all query statements to a single line.

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fantastic! thanks for the tip! :-) If -q is added to the -A -t parameters, the COPY log output is also suppressed. Now all I see is warnings and errors, just what I wanted. – ssc Jan 13 '11 at 4:23
PS: care to remove the \ in front of \copy so later readers don't get confused ? – ssc Jan 13 '11 at 4:24
The second \ is intentional... you can't do COPY ... TO file unless you're a superuser, whereas a client-side \copy will work for everyone. – araqnid Jan 13 '11 at 4:28


\o /dev/null
SELECT my_func(my_args);


SELECT my_func(my_args) \g /dev/null
share|improve this answer
That's much more elegant that copy/\copy hackage. – araqnid Jan 13 '11 at 20:13

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