>> According to the manualof RowDescription message >> https://www.postgresql.org/docs/12/protocol-message-formats.html >> >> Specifies the number of fields in a row (can be zero). >> >> Does 0 fields could actually happen? > > Yes, e.g.: > > SELECT; Thanks. Is it a valid SQL statement according to the standard? Best regards, -- Tatsuo Ishii SRA OSS, Inc. Japan English: http://www.sraoss.co.jp/index_en.php Japanese:http://www.sraoss.co.jp