>From 9.4 psql has slightly changed it's behavior. Pre 9.4: psql --version psql (PostgreSQL) 9.3.4 psql -U '' test FATAL: no PostgreSQL user name specified in startup packet psql: FATAL: no PostgreSQL user name specified in startup packet
9.4: psql -U '' test psql (9.4beta1, server 9.3.4) Type "help" for help. test=# Please note that this behavior change was actually brought by libpq: Have libpq's PQconnectdbParams() and PQpingParams() functions process zero-length strings as defaults (Adrian Vondendriesch) Previously, these functions treated zero-length string values as defaults only in some cases. It's not very clear that username is affected by this change here. I just want to remind hackers before you get inquries on this from PostgreSQL users. Best regards, -- Tatsuo Ishii SRA OSS, Inc. Japan English: http://www.sraoss.co.jp/index_en.php Japanese:http://www.sraoss.co.jp -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers