问题
My problem: I'm trying to run a database generation script at the command line via a batch file as part of a TFS build process to enable nightly testing on a known dataset.
The scripts we run are outputting Notices, Warnings and some Errors on the command line. I would like to suppress at least the Notices and Warnings, and if possible the Errors as they don't seem to have an impact on the overall success of the scripts. This output seems to be affecting the success or failure of the process as far as the TFS build process is concerned. It's highlighting every line of output from the scripts as errors and failing the build.
As our systems are running on Windows, most of the potential solutions I've found online don't work as they seem to target Linux.
I've changed the client_min_messages to error in the postgresql.conf file, but when looking at the same configuration from pgAdmin (tools > server configuration) it shows the value as Error but the current value as Notice.
All of the lines in the batch file that call psql use the -q flag as well but that only seems to prevent the basics such as CREATE TABLE and ALTER TABLE etc.
An example line from the batch file is:
psql -d database -q < C:\Database\scripts\script.sql
Example output line from this command:
WARNING: column "identity" has type "unknown" DETAIL: Proceeding with relation creation anyway.
Specifying the file with the -f flag makes no difference.
I can manually run the batch file on my development machine and it produces the expected database regardless of what errors or messages show on the command prompt.
So ultimately I need all psql commands in my batch files to run silently.
回答1:
psql COMMAND &> output.txt
Or, using your example command:
psql -d database -q < C:\Database\scripts\script.sql &> output.txt
回答2:
use psql -o flag to send the command output to the filename you wish or /dev/null if you don't care about it.
来源：https://stackoverflow.com/questions/35482382/psql-how-can-i-prevent-any-output-on-the-command-line