PostgreSQL PGSERVICE
Service name to use for additional parameters. It specifies a service name in pg_service.conf that holds additional connection parameters. This allows applications to specify only a service name so connection parameters can be centrally maintained
The connection service file allows libpq connection parameters to be associated with a single service name. That service name can then be specified by a libpq connection, and the associated settings will be used. This allows connection parameters to be modified without requiring a recompile of the libpq application. The service name can also be specified using the PGSERVICE environment variable.
The connection service file can be a per-user service file at ~/.pg_service.conf or the location specified by the environment variable PGSERVICEFILE, or it can be a system-wide file at`pg_config --sysconfdir`/pg_service.conf or in the directory specified by the environment variable PGSYSCONFDIR. If service definitions with the same name exist in the user and the system file, the user file takes precedence.
The file uses an "INI file" format where the section name is the service name and the parameters are connection parameters;
# comment
[mydb]
host=somehost
port=5433
user=admin
An example file is provided at share/pg_service.conf.sample.
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