""xiapw"" <xiapw@xxxxxxxxxxx> wrote in message news:000e01c60c57$52c5f170$4503a8c0@xxxxxxxx >I wanted to add a new column to system table(pg_database),but failed at >last. Who know how to do this and can you tell me ? A recent change to pg_database (adding a new column) happened on -- Sun Jul 31 17:19:21 2005 UTC (4 months, 4 weeks ago) by tgl Log Message: ----------- Add per-user and per-database connection limit options. This patch also includes preliminary update of pg_dumpall for roles. Petr Jelinek, with review by Bruce Momjian and Tom Lane. -- Try to find out related changes on pgsql.committers. Regards, Qingqing