- You don't need anything extra special to read 1MB chunks of a file at a time, the read function can do that quite easily.
- If you use placeholders in your SQL (and you always always always should whenever possible), you never have to worry about special/dangerous characters in the data you're inserting into the DB.
Here's a little demo that reads 1MB at a time, and inserts it into the DB using placeholders.
open my $fh, 'big-binary-data.file'
or die "Couldn't open file: $!";
# prepares an SQL statement with data to be filled in later
my $sql = "insert into table set chunk_num=?, data=?";
my $sth = $dbh->prepare($sql) or die "Couldn't prepare sql statement:
+$!";
my $chunk_num = 0;
my $chunk_size = 1024 * 1024;
while ( read( $fh, my $buffer, $chunk_size ) ) {
$chunk_num++;
# executes the statement with the appropriate data filled in
$sth->execute( $chunk_num, $buffer )
or die "Couldn't insert data: $!";
}
$sth->finish;
This should give you a decent starting place. I highly recommend reading the database
tutorials here on PM (as well as the
DBI documentation) if you're a little unsure of what placeholders do. After understanding them, you will quickly realize their usefulness.
blokhead