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From:Hurrican19 Date:January 6 2005 7:18pm
Subject:RE: Trouble w/ mysqldump (images attached)
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Hi Tom,
    Thanks for the reply!  I show the following information for my DB,
and shows the same for both the 3.23 DB And the 4.18a DB

Field      ----   Type     ----     Collation 
avatardata ---- mediumtext ---- latin1_swedish_ci 

I pasted a data table from the bad avatar and the good avatar
to a file differential program, there was no differential at all
that the system found..

I'm not too sure where or what to do to change this information? Do you mean
that I recompile MySQL using different ./configure commands?

Thanks Tom!



Hurrican19@stripped <mailto:Hurrican19@stripped> wrote on Thursday, January
06, 2005 4:57 PM:

> Sorry, forgot the attachments.  These are the same exact two
> avatars from the same user, using my 3.23 backup, for the
> good avatar, then the 4.18 bad avatar

Looks like a character set issue - what's the column type, BLOB or TEXT or
something in between?

This could be due to the server converting UTF-8 into a different character
set. Characters such as 0x8F (143 decimal) and 0x8D are being converted into
0x3F, which is "?" and often indicates that the character does not exist in
the target collation. Basically, MySQL is treating the content as text, and
replacing characters which it doesn't understand with "?". Try using a
different collation or character set, and importing again?

Unfortunately, the conversion is not reversible - a set of characters have
been replaced with a single character, so although the image is the same
binary size, some of the data has been permanently lost unless you can
restore from the backup.

cheers,

Tom


In a message dated 1/6/2005 12:48:28 PM Eastern Standard Time, Tom Molesworth
<TomM@stripped> writes:

>Hurrican19@stripped <mailto:Hurrican19@stripped> wrote on Thursday, January
>06, 2005 4:57 PM:
>
>> Sorry, forgot the attachments.  These are the same exact two
>> avatars from the same user, using my 3.23 backup, for the
>> good avatar, then the 4.18 bad avatar
>
>Looks like a character set issue - what's the column type, BLOB or TEXT or
>something in between?
>
>This could be due to the server converting UTF-8 into a different character
>set. Characters such as 0x8F (143 decimal) and 0x8D are being converted into
>0x3F, which is "?" and often indicates that the character does not exist in
>the target collation. Basically, MySQL is treating the content as text, and
>replacing characters which it doesn't understand with "?". Try using a
>different collation or character set, and importing again?
>
>Unfortunately, the conversion is not reversible - a set of characters have
>been replaced with a single character, so although the image is the same
>binary size, some of the data has been permanently lost unless you can
>restore from the backup.
>
>cheers,
>
>Tom
>
>-- 
>MySQL General Mailing List
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>
>
Thread
Re: Trouble w/ mysqldump (images attached)Hurrican196 Jan
RE: Trouble w/ mysqldump (images attached)Tom Molesworth6 Jan
RE: Trouble w/ mysqldump (images attached)Hurrican196 Jan
  • Re: Trouble w/ mysqldump (images attached)Dr. Frank Ullrich7 Jan
RE: Trouble w/ mysqldump (images attached)Tom Molesworth7 Jan
RE: Trouble w/ mysqldump (images attached)Hurrican198 Jan
Re: Trouble w/ mysqldump (images attached)Hurrican198 Jan
  • Re: Trouble w/ mysqldump (images attached)Gleb Paharenko8 Jan
Re: Trouble w/ mysqldump (images attached)Hurrican1911 Jan
  • Re: Trouble w/ mysqldump (images attached)Gleb Paharenko11 Jan
Re: Trouble w/ mysqldump (images attached)Hurrican1911 Jan
  • Re: Trouble w/ mysqldump (images attached)Gleb Paharenko12 Jan
Re: Trouble w/ mysqldump (images attached)Hurrican1912 Jan