I recently moved a mybb forum away from mysql to postgres. Along the way I encountered a couple of things that either didn't seem to be supported or I'm just not doing it right. First, the server this is on is running version 8.4.22
8.4 is end-of-life, so it's time to move.
FYI, this isn't really the right place for these questions; pgsql-general or Stack Overflow is more appropriate for topics not relating to PostgreSQL code and design.
#1 Are joins supported in deletes? The same join syntax works fine as a select.
Yes, but the syntax is a bit different and you can't use aliases on the target table. You can also (unfortunately) only do inner joins.
#2 is extract supported in a select statement dealing with a table? To explain this one, here is the error I get:
If 'dateline' is an integer, you'll have to turn it into a timestamp or date before you can extract the epoch.
# select extract(epoch from timestamp dateline::timestamp) from mybb_adminlog limit 1;
You can't use the typed-literal syntax
TIMESTAMP 'something'
for a column reference, bind-parameter, etc. You can only use it for literals. Use a CAST or the PostgreSQL :: shorthand. Just remove the "timestamp" from "FROM timestamp".
Doesn't matter if I use epoch or day or anything else, they all fail with the same error. And yes, dateline is a timestamp.
