On Mon, Feb 11, 2013 at 1:45 PM, jose isaias cabrera
<cabr...@wrc.xerox.com>wrote:
>
> Greetings.
>
> I have this table,
>
> CREATE TABLE Test (login primary key, password);
>
> and I would like to save zlib data using ubyte[] and also call it back in.
Are you trying to store zlib-compressed content in the database file, then
read back the original uncompressed content? If so, then I suggest adding
two application-defined functions compress() and decompress():
UPDATE test SET password=compress(password) WHERE login='test';
SELECT decompress(password) FROM test WHERE login='test';
Sample implementations for the compress() and decompress() functions can be
copied from here:
http://www.fossil-scm.org/fossil/artifact/a59638aa4c0?ln=53-105
The code for registering these application-defined functions with the
SQLite database connection is seen here:
http://www.fossil-scm.org/fossil/artifact/a59638aa4c0?ln=119-122
> I have things like this:
> 1. To save in SQLite,
> cmd =
> " UPDATE Test password = " ~
> cast(char[])cast(ubyte[])std.zlib.compress(cast(void[])"password") ~
> " WHERE login = 'test';";
>
> This works, or at least, it saves in SQlite, but when I call it back, it
> does not.
>
> 2. To call it in SQLite,
>
> char[] passWord =
> cast(char[])cast(ubyte[])std.zlib.uncompress(cast(void[])r[0]["password"]);
>
> where r[0]["password"] is what I just SELECTED from SQlite. I am getting
> an UTF8 error. This is a D program, so, the syntax may not be known to
> some or all of you. However, the more realistic SQLite question would be,
> how can I save ubyte data in SQLite and also call it back. Thoughts?
> Comments? Jokes? :-)
>
> thanks.
>
> josé
>
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>
--
D. Richard Hipp
d...@sqlite.org
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