> There's another issue with Interbase that people considering a
> change should
> be aware of. Interbase's performance when using TTables through
> the BDE is
> absolutely abysmal.
Um, as far as I know, this is a problem with ANY SQL-based DB (oracle et
al). It comes from
doing
select * from table
then get all the records. Not good in a 5 million row table :)
where an ISAM db just reads records as needed.
Try and apples-to-apples comparison:
Paradox:
table.first
while not table.eof
inmemorylist.add(table1.currentRecord);
table.next;
IB:
select * from table
which ever way you look at it, getting a complete table down is ALWAYS going
to be somewhat quicker in an ISAM situation - you can seek directly to where
you want within the file. SQL has other advantages (joins, SP's, triggers,
RI, etc) that IASM/file-based just can't do well.
It also might depend where your cursors are - client side needs the data
local, server should use the server's internal cursor system, and should be
a LOT faster. You might also want to look at the BDE properties for the
connection - especially the MAXROWS and SQLQRYMODE parameters.
:)
N
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