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------- Additional comments from lu...@openoffice.org Mon Dec 6 10:22:08 +0000 2010 ------- OK, I see where you are coming from. You need to refetch backward cursor positions since some drivers don't implement this correctly or lie about it. So your fix removed "unnecessary" refetching. As long as you scroll down, there should be no refetching. You looked at reducing the "select * from y where key = ?" I look at it from different perspective. I have a problem with the initial "select * from y". Why fetch the full table if you look at the table through a window (limited number of rows at a time)? Why load blobs or binary data when they are not displayed and when you can't do anything with them? No insert, no save. Opening large tables can be really slow (long time to first display) or simply impossible due to an out of memory condition (too many rows, blobs, ...). OOO internally is memorywise OK storing only the data for the window displayed but it forces the driver to fetch the whole lot... An overall minimum memory and bandwidth solution would consist of a "select key(s) from y" followed by a series of "select displayable fields from y where key(s) = ?". To further reduce bandwidth, replace the "where key(s) = ?" by "where key(s) = ? or key(s) = ? ... or key(s) = ?" to retrieve multiple rows in one go. MSAccess uses a fixed number of rows (10), but obviously a variable number (the rows needed to fill the window and not already displayed and not cached in OOO) would be optimal. I'm not going to reopen the issue again as it will be closed by the next reply but you will understand that for me the solution proposed only addresses a small and minor part of the problem (if there is no out of memory before displaying the first line...). --------------------------------------------------------------------- Please do not reply to this automatically generated notification from Issue Tracker. Please log onto the website and enter your comments. http://qa.openoffice.org/issue_handling/project_issues.html#notification --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@dba.openoffice.org For additional commands, e-mail: issues-h...@dba.openoffice.org --------------------------------------------------------------------- To unsubscribe, e-mail: allbugs-unsubscr...@openoffice.org For additional commands, e-mail: allbugs-h...@openoffice.org
