---------------- PostgreSQL 13.13 on x86_64-pc-linux-gnu, compiled by gcc (GCC) 8.5.0 20210514 (Red Hat 8.5.0-18)... postgres=# select usename from pg_user; #查看系统用户 usename ---------- postgres

boot time, there is probably a start-up file that will accomplish the same thing. For example, on a Red Hat Linux system one might find that /etc/rc.d/init.d/postgresql stop works. Very old versions might 8.0.0 Build farm emu, snapshot 2004-12-06 11:35:03 3.6 Red Hat Linux AMD64 8.0.0 Tom Lane (), 2004-12-07 RHEL 3AS Red Hat Linux IA64 8.0.0 Tom Lane (), 2004-12-07 Reported Remarks Red Hat Linux PowerPC 8.0.0 Tom Lane (), 2004-12-07 RHEL 3AS Red Hat Linux PowerPC 64 8.0.0 Tom Lane (), 2004-12-07 RHEL 3AS Red Hat Linux S/390 8

boot time, there is probably a start-up file that will accomplish the same thing. For example, on a Red Hat Linux system one might find that /etc/rc.d/init.d/postgresql stop works. Very old versions might 2004-12-06 11:35:03 3.6 Red Hat Linux AMD64 8.0.0 Tom Lane (), 2004-12-07 RHEL 3AS Red Hat Linux IA64 8.0.0 Tom Lane (), 2004-12-07 RHEL 3AS Red Hat Linux PowerPC 8.0 2004-12-07 RHEL 3AS Red Hat Linux PowerPC 64 8.0.0 Tom Lane (), 2004-12-07 RHEL 3AS Red Hat Linux S/390 8.0.0 Tom Lane (), 2004-12-07 RHEL 3AS Red Hat Linux S/390x 8

boot time, there is probably a start-up file that will accomplish the same thing. For example, on a Red Hat Linux system one might find that /etc/rc.d/init.d/postgresql stop works. Very old versions might 2004-12-06 11:35:03 3.6 Red Hat Linux AMD64 8.1.0 Tom Lane (), 2005-10-23 RHEL 4 Red Hat Linux IA64 8.1.0 Tom Lane (), 2005-10-23 RHEL 4 Red Hat Linux PowerPC 8.1.0 2005-10-23 RHEL 4 Red Hat Linux PowerPC 64 8.1.0 Tom Lane (), 2005-10-23 RHEL 4 Red Hat Linux S/390 8.1.0 Tom Lane (), 2005-10-23 RHEL 4 Red Hat Linux S/390x 8.1

boot time, there is probably a start-up file that will accomplish the same thing. For example, on a Red Hat Linux system one might find that /etc/rc.d/init.d/postgresql stop works. Very old versions might 2004-12-06 11:35:03 3.6 Red Hat Linux AMD64 8.1.0 Tom Lane (), 2005-10-23 RHEL 4 Red Hat Linux IA64 8.1.0 Tom Lane (), 2005-10-23 RHEL 4 Red Hat Linux PowerPC 8.1.0 2005-10-23 RHEL 4 Red Hat Linux PowerPC 64 8.1.0 Tom Lane (), 2005-10-23 RHEL 4 Red Hat Linux S/390 8.1.0 Tom Lane (), 2005-10-23 RHEL 4 Red Hat Linux S/390x 8.1

boot time, there is probably a start-up file that will accomplish the same thing. For example, on a Red Hat Linux system one might find that /etc/rc.d/init.d/postgresql stop works. 4. If you are installing test failure on 3.8 Red Hat Linux AMD64 8.1.0 Tom Lane (), 2005-10-23 RHEL 4 Red Hat Linux IA64 8.1.0 Tom Lane (), 2005-10-23 RHEL 4 Red Hat Linux PowerPC 8.1.0 2005-10-23 RHEL 4 Red Hat Linux PowerPC 64 8.1.0 Tom Lane (), 2005-10-23 RHEL 4 274 Chapter 14. Installation Instructions OS Processor Version Reported Remarks Red Hat Linux S/390 8

boot time, there is probably a start-up file that will accomplish the same thing. For example, on a Red Hat Linux system one might find that /etc/rc.d/init.d/postgresql stop works. 4. If you are installing test failure on 3.8 Red Hat Linux AMD64 8.1.0 Tom Lane (), 2005-10-23 RHEL 4 Red Hat Linux IA64 8.1.0 Tom Lane (), 2005-10-23 RHEL 4 Red Hat Linux PowerPC 8.1.0 2005-10-23 RHEL 4 Red Hat Linux PowerPC 64 8.1.0 Tom Lane (), 2005-10-23 RHEL 4 274 Chapter 14. Installation Instructions OS Processor Version Reported Remarks Red Hat Linux S/390 8

examining the function body. As an example, consider this situation: CREATE TYPE rainbow AS ENUM ('red', 'orange', 'yellow', 'green', 'blue', 'purple'); CREATE TABLE my_colors listed in Table 9.32. The examples assume an enum type created as: CREATE TYPE rainbow AS ENUM ('red', 'orange', 'yellow', 'green', 'blue', 'purple'); Table 9.32. Enum Support Functions Function Description enum_first(anyenum) Returns the first value of the input enum type enum_first(nul- l::rainbow) red enum_last(anyenum) Returns the last value of the input enum type enum_last(nul- l::rainbow) purple

examining the function body. As an example, consider this situation: CREATE TYPE rainbow AS ENUM ('red', 'orange', 'yellow', 'green', 'blue', 'purple'); CREATE TABLE my_colors listed in Table 9.32. The examples assume an enum type created as: CREATE TYPE rainbow AS ENUM ('red', 'orange', 'yellow', 'green', 'blue', 'purple'); Table 9.32. Enum Support Functions Function Description enum_first(anyenum) Returns the first value of the input enum type enum_first(nul- l::rainbow) red enum_last(anyenum) Returns the last value of the input enum type enum_last(nul- l::rainbow) purple

examining the function body. As an example, consider this situation: CREATE TYPE rainbow AS ENUM ('red', 'orange', 'yellow', 'green', 'blue', 'purple'); CREATE TABLE my_colors listed in Table 9.32. The examples assume an enum type created as: CREATE TYPE rainbow AS ENUM ('red', 'orange', 'yellow', 'green', 'blue', 'purple'); Table 9.32. Enum Support Functions Function Description enum_first(anyenum) Returns the first value of the input enum type enum_first(nul- l::rainbow) red enum_last(anyenum) Returns the last value of the input enum type enum_last(nul- l::rainbow) purple