Beefy Boxes and Bandwidth Generously Provided by pair Networks
No such thing as a small change

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

Many, many good reasons to use DBI over that.

Firstly, think of all the escaping necessary in defining $cmd. You need to think about not just escaping string literals at the SQL level, but also shell escaping because the command will be passed to your shell, and lastly Perl literal escaping. Ouch.

With DBI you eliminate the need to think about shell escaping; and if you use prepared queries in DBI (which you should) you also eliminate the need to think about the escaping of SQL string literals.

Secondly, accessing a database via pipes means the data you get back needs to be parsed. This can be non-trivial, especially if some of the results will include multi-line strings.

Thirdly, using DBI, if you avoid using vendor-specific SQL extensions, it's pretty easy to write code that will run on many different databases - even databases you've never heard of. You'd never get that parsing the output of command-line SQL clients because each client has its own output formatting, its own command-line argument parsing, etc.


package Cow { use Moo; has name => (is => 'lazy', default => sub { 'Mooington' }) } say Cow->new->name

In reply to Re: What use DBI? by tobyink
in thread What use DBI? by monk2b

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and nobody stirs...

    How do I use this? | Other CB clients
    Other Users?
    Others imbibing at the Monastery: (4)
    As of 2018-05-26 16:10 GMT
    Find Nodes?
      Voting Booth?