The trick is to have a way to identify the first/current row and use that in the WHERE clause.
e.g. SELECT ... FROM customers WHERE customer_id >= last_displayed LIMIT window_size If your select statement is a complex join without any usable key, you will have to resort to storing the results CREATE TEMP TABLE select_results AS SELECT ... And displaying only those within the current window SELECT * FROM select_results WHERE rowid >= starting_line LIMIT window_size; As an optimization, you can populate the temporary table in the background while displaying the first page of results. -----Ursprüngliche Nachricht----- Von: sqlite-users [mailto:sqlite-users-boun...@mailinglists.sqlite.org] Im Auftrag von Thomas Flemming Gesendet: Mittwoch, 24. Mai 2017 10:09 An: sqlite-users@mailinglists.sqlite.org Betreff: [sqlite] SQLite3.Step fast forward / skipping rows Hi SQLite Users, I have a SELECT query, which returns some 100000 records and is displayed in a scrollable ListView. When the user scrolls down the list, each new row is loaded with SQLite3.Step(). The problem is, when the user scrolls fast with the scroll-slider, lots of rows are skipped, but SQLite still needs to load them all with SQLite3.Step until it reaches the row which is actually needed. This is very slow. Is there a way to skip all these unnecessary rows? For example going directly from row 1000 to row 100000 ? I tried SELECT ... OFFSET 100000 but this is also very slow the more down we go. Thanks Tom -- /**************************************** ** Flemming Software Development CC ** Thomas Flemming ** PO Box 81244 ** Windhoek, Namibia ** http://www.quovadis-gps.com ** mail t...@qvgps.com ** +264 (0)81 3329923 ** +49 (0)6182 8492599 ***************************************/ _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users ___________________________________________ Gunter Hick Software Engineer Scientific Games International GmbH FN 157284 a, HG Wien Klitschgasse 2-4, A-1130 Vienna, Austria Tel: +43 1 80100 0 E-Mail: h...@scigames.at This communication (including any attachments) is intended for the use of the intended recipient(s) only and may contain information that is confidential, privileged or legally protected. Any unauthorized use or dissemination of this communication is strictly prohibited. If you have received this communication in error, please immediately notify the sender by return e-mail message and delete all copies of the original communication. Thank you for your cooperation. _______________________________________________ sqlite-users mailing list sqlite-users@mailinglists.sqlite.org http://mailinglists.sqlite.org/cgi-bin/mailman/listinfo/sqlite-users