What is the influence on database growing in comparrison to permanent
table frequently inserted/deleted rows ?
The tables are dropped automatically after the connection is closed. The
database doesn't grow because of temporary tables. As for comparison to a
frequently inserted/deleted table, that would depend on the time between
vacuums. The rows aren't "removed" from a table until a vacuum is
performed.
On Jul 22, 2005, at 1:55 PM, Zlatko Matic wrote:
Hello.
I have some tables that are updated by several users in the same time
and are used in queries for reports. Those tables have rows that are
actualy copied from original tables that are not to be altered. There
is a procedure that inserts rows for every user when connects, along
with his username, so different users can't interfere with each other
because every user has his own copy of rows that he can update, and
records are filtered by current_user.
Well, it's my heritage from MS Access, before I moved to Postgres,
because there is no such thing as temporary table in Access...
Now, I'm wondering is there any true advantage to implement temporary
tables for each user, insted of one table with inserted rows with
username for every user ?
Temporary tables are not per-user, but per-connection. A user can be
connected twice, but a temporary table created on one connection is not
visible from the other connection. Also, temporary tables are
temporary--they disappear after the connection is closed.
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