Phobic ----- Original Message ----- From: Simon Slavin [mailto:slav...@bigfraud.org] Sent: Friday, December 03, 2010 06:36 PM To: General Discussion of SQLite Database <sqlite-users@sqlite.org> Subject: Re: [sqlite] Degrees of separation
On 3 Dec 2010, at 11:14pm, Drake Wilson wrote: > Another would be to > rewrite the query to union the two directions together You could do this with a VIEW, of course. Have a VIEW that reflects the UNION of the 'know' table with its elements in the opposite order. Then query this VIEW instead of the original table. An alternative which would lead to faster code would be a TRIGGER which every time something was put in the 'know' table inserted another record with the elements reversed. It should, of course, be an INSERT OR IGNORE, and you'd need a UNIQUE key on the table to prevent duplication. Simon. _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users --------------------------------------------------------------------- This transmission (including any attachments) may contain confidential information, privileged material (including material protected by the solicitor-client or other applicable privileges), or constitute non-public information. Any use of this information by anyone other than the intended recipient is prohibited. If you have received this transmission in error, please immediately reply to the sender and delete this information from your system. Use, dissemination, distribution, or reproduction of this transmission by unintended recipients is not authorized and may be unlawful. _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
