Christopher Jones c.jones at ucl.ac.uk
Thu Jan 8 23:02:58 GMT 2009

I'm having issues inserting files into a BLOB field in MySQL, using  
something similar to this;

my $file_str;
   local( $/, undef ) ;
   $file_str = <$filehandle>;
my $statement = "
   INSERT INTO 'files' (file_name, file)
   VALUES (?,?,?)
my $sth = $dbh->prepare($statement);

The problem is that files bigger than 64K are being truncated on their  
insert into the database (i.e. the maximum BLOB length in the database  
is 64K). The global max_allowed_packet variable is set to 16776192, so  
that doesn't seem to be the culprit, and I don't know of any other  
limitations in MySQL that would limit the size of the insert.

I'm tearing my hair out with this, and after wading through countless  
dead-ends I've pretty much given up!

Is it possible this is a DBI problem, or is it bound to be a MySQL  
issue? Any clues, from any direction, would be very gratefully received.



PS Perl 5.8.8, DBI v1.607, MySQL 5.1, if that makes any difference

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