AFAICT It is not the new value of the integer but rather the new contents of the blob field that causes the record image to grow and exceed the previously allocated space, which means the row has to move. Rewriting the record and thus expiring the blob handle is triggered by the update of the other field.
You might like to read up on SQLite database and record format to gain insight into this. -----Ursprüngliche Nachricht----- Von: sqlite-users [mailto:sqlite-users-boun...@mailinglists.sqlite.org] Im Auftrag von Yuri Gesendet: Montag, 06. März 2017 11:39 An: SQLite mailing list <sqlite-users@mailinglists.sqlite.org> Betreff: Re: [sqlite] [BUG REPORT] Open blob is invalidated by the update to unrelated fields in the same row On 03/06/2017 01:00, Dominique Devienne wrote: > This is clearly documented > inhttps://www.sqlite.org/c3ref/blob_open.html > though, so I'm afraid this is "by design". --DD Even though this is documented, parts of this limitation don't appear to be reasonable. Updating an integer field in the same row shouldn't affect the blob field. Rows can be very large and shouldn't move when individual fields are updated. Yuri _______________________________________________ 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
