如何使用perl dbi和mysql压缩数据

Question

I am using perl dbi connection to pull data remotely. I am looking to compress the data if possible. Is there a way to do a file compression over the net with perl dbi for mysql?

Here is my snippet for getting data:

     my $sth = $dbh->prepare("SELECT UUID(), '$node', 1, 2, 3, 4, vts FROM $tblist");
     $sth->execute();
     while (my($uid, $hostnm,$1,$2,$3,$upd,$vts) = $sth->fetchrow_array() ) { 
       print $gzip_fh "rec^A$uid^Ehost^A$hostnm^E1^A$1^E2^A$2^E3^A$3^E4^A$upd^Evts^A$vts^D";
     }
     $sth->finish;

Answer 1

Best option will be to use prepared statements ; with this, once you have compiled the statement once you just have to send the arguments over the wire each time you need to run the queries.

The example here shows how to perform a simple prepare, if you are going to utilize the same query over and over again you should keep your $sth which you can continue to call $sth->execute() on with new variables. The reason this cuts down on your network traversal is because you're not sending the query each time you run $sth->execute($var) , instead you're just passing an ID for the prepared statement and the variables that go into the ? placeholders.

$sth = $dbh->prepare("select * from table where column=?");
$sth->execute($var);