使用功能
current_setting()
SELECT current_setting('abc.my_var');http://www.postgresql.org/docs/current/static/functions-admin.html#FUNCTIONS-
ADMIN-SET

使用功能
current_setting()
SELECT current_setting('abc.my_var');http://www.postgresql.org/docs/current/static/functions-admin.html#FUNCTIONS-
ADMIN-SET