Hello Yusuke, Il giorno mar, 27/08/2019 alle 07.29 +0000, Egashira, Yusuke ha scritto: [...] > I referred the below documents. > - CONNECT of ecpg: > https://www.postgresql.org/docs/9.5/ecpg-sql-connect.html > - Connection string of libpq: > https://www.postgresql.org/docs/9.5/libpq-connect.html#LIBPQ-CONNSTRING [...] It seems to me that ECPG documentation does not allow specifying username and/or password in the connection string. The correct syntax should be: EXEC SQL CONNECT TO "unix:postgresql://localhost/connectdb" USER "myuser" IDENTIFIED BY "pass&word" Bye, Giuseppe