示例:
select proname, provolatile from pg_proc where proname in ('now', 'clock_timestamp');
s 代表 stable
v 代表 volatile
i(还是m,忘记了)代表 immutable
示例:
select proname, provolatile from pg_proc where proname in ('now', 'clock_timestamp');
s 代表 stable
v 代表 volatile
i(还是m,忘记了)代表 immutable