Re: [sqlite] Collation & blobs
I can still keep my routes in text presentation notation like 1.1.0.0/16 or fe80::/16. Thanks, -Alex On Thu, Jun 12, 2008 at 7:32 PM, D. Richard Hipp <[EMAIL PROTECTED]> wrote: > > On Jun 12, 2008, at 6:35 PM, Alex Katebi wrote: > > > The custom sqlite3_create_collation( ) is a perfect solution for > > implementing an Internet Protocol Routing Table. > > But I am not sure if SQLite will call a custom collation function if > > column > > values are blobs. In other word, are blobs considered for collation? > > > > Blob always sort in memcmp() order. The sorting rules for SQLite are > (and always have been): > > 1. NULLs sort first > 2. Numbers sort next in numerical order (floating point values > and integers interleave as appropriate). > 3. Text sorts next in the order determined by the collating > sequence > 4. BLOBs sort last in memcmp() order. > > > > D. Richard Hipp > [EMAIL PROTECTED] > > > > ___ > sqlite-users mailing list > sqlite-users@sqlite.org > http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users > ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
Re: [sqlite] Collation & blobs
On Jun 12, 2008, at 6:35 PM, Alex Katebi wrote: > The custom sqlite3_create_collation( ) is a perfect solution for > implementing an Internet Protocol Routing Table. > But I am not sure if SQLite will call a custom collation function if > column > values are blobs. In other word, are blobs considered for collation? > Blob always sort in memcmp() order. The sorting rules for SQLite are (and always have been): 1. NULLs sort first 2. Numbers sort next in numerical order (floating point values and integers interleave as appropriate). 3. Text sorts next in the order determined by the collating sequence 4. BLOBs sort last in memcmp() order. D. Richard Hipp [EMAIL PROTECTED] ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
[sqlite] Collation & blobs
The custom sqlite3_create_collation( ) is a perfect solution for implementing an Internet Protocol Routing Table. But I am not sure if SQLite will call a custom collation function if column values are blobs. In other word, are blobs considered for collation? One can format a blob with route mask length in the first byte followed by the destination address bytes. Thanks, -Alex ___ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
