At 0:14 -0500 12/30/02, Philip Mak wrote:
On Sun, Dec 29, 2002 at 11:09:47PM -0600, Paul DuBois wrote:
At 5:28 -0500 12/29/02, Philip Mak wrote:
>sql, table
>
>I'm storing a SHA1 checksum as "varchar(20) binary" in my application.
Other people have addressed other aspects of your message, but I'm
curious why you're using a VARCHAR(20), when SHA1() returns a 40-byte
string.
>
>After running a test, it seems MySQL will strip trailing spaces from a
>varchar column, even if it is binary! That means if the last character
>of my SHA1 checksum happens to be a space, MySQL will corrupt it.
SHA1() returns a string of 40 hexadecimal digits. There won't be trailing
spaces.
Are you converting the hex string to some other representation before
storing it?
Yes, I'm converting it to a binary representation first, so that it
only takes 20 bytes instead of 40 bytes.
Okay. I see then why you might end up with trailing 'spaces'.
I ended up using a TINYBLOB to store my checksum, since performance
shouldn't be overly critical in my application.
Sounds like a good choice.
---------------------------------------------------------------------
Before posting, please check:
http://www.mysql.com/manual.php (the manual)
http://lists.mysql.com/ (the list archive)
To request this thread, e-mail <[EMAIL PROTECTED]>
To unsubscribe, e-mail <[EMAIL PROTECTED]>
Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
