This code snippet solved a problem I had where I needed to update a series of rows in a purchase order database with numbers being stored in cgi variables based on oid (object identification) numbers.

The cgi variables were named via oid's which was convenient at the time. I don't know if databases other than PostgreSQL have oids, but I wouldn't be surprised if they did. Some of the variable and placeholders may be unecessary, but that's why I am posting this, to see other right ways to do this.

  $sth = $dbh->prepare(q{SELECT oid from items where orderid = ?}) || 
+die $dbh->errstr;
  $sth->execute($orderid) || die $dbh->errstr;
  my @oids;
  my $oid;
  $sth->bind_columns(\$oid);  # Binds each column to $oid, through ref
+erence
  my $i;
  my $max;
  for ($i = 0; $sth->fetch; $i++) { # The fetch updates $oid to the ne
+xt one.
    $oids[$i] = $oid;               
    $max = $i;
  }
  for ($i = 0; $i <= $max; $i++) {
    my $price = $q->param("item_" . $oids[$i] . "_price"); # Gets pric
+e from cgi
    my $curoid = $oids[$i]; # unecessary...?
    $sth = $dbh->prepare(q{UPDATE items set price = (?) WHERE oid = (?
+)}) || die $dbh->errstr;
    $sth->execute($price, $curoid) || die $dbh->errstr;
  }

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In reply to DBI Select and Update by nutate

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