-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Jacob Lister wrote: > What provision is there for the inclusion of new data types in SQLite > and is such an inclusion possible or likely in future?
Updating or adding a data type would affect the file format and many of the API families (eg sqlite3_bind_*, sqlite3_column_*). The chance of such a change going into the SQLite core is practically zero since it would break compatibility at the file format and API level. If you are ok with your files and API usage being incompatible with "standard" SQLite ones then I'd recommend contracting the SQLite "company" to do the work. (They'd make it fit in best, include tests, maintain it for future SQLite versions and deal with niggly issues such as query optimisers.) http://www.hwaci.com/sw/sqlite/prosupport.html > My current > thinking is to store decimal32/64 bit values as 64 bit integers in an > SQLite database and use custom functions to convert these to/from > integers/strings/doubles etc and perform arithmetic, The problem with repurposing integers is that they can easily be accidentally used as integers without signalling an error. You would be better off using blobs. (Sadly they don't give errors but do give zero so you'd at least be able to detect wrong numbers coming back.) sqlite> select x'aa'+x'bb'; 0 sqlite> select x'aa'/x'bb'; sqlite> select x'aa'-x'bb'; 0 sqlite> select x'aa'*x'bb'; 0 > but obviously a native integrated type would be more convenient Not only do you need the type but every arithmetic operation would also need to be updated. It will be even more fun if you also want to support the - -1985 representations (eg normal SQLite database format) since you'll have both semantics in the same program at the same time. Are you going to be using a CPU that has native -2008 instructions? Roger -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAksuytMACgkQmOOfHg372QTQDACfTPmixLnSRXUzps85Z0daDG3y k5MAn1i8J8FwWwzXx4D1MLVlc0PoBXP3 =gBmz -----END PGP SIGNATURE----- _______________________________________________ sqlite-users mailing list sqlite-users@sqlite.org http://sqlite.org:8080/cgi-bin/mailman/listinfo/sqlite-users
