Beefy Boxes and Bandwidth Generously Provided by pair Networks
Don't ask to ask, just ask

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
I would prefer that DBI issued a warning or even refuse to work with inline values, but that would add a lot of overhead, as DBI would need to actually parse the SQL statement.

Worse than that, it would simply be impossible to do.

On receiving the query "SELECT * FROM foo WHERE bar = 'baz'", how would DBI know whether it had been called as $dbh->selectall_arrayref("SELECT * FROM foo WHERE bar = 'baz'"); (which is fine - the baz is a hard-coded literal) or as $dbh->selectall_arrayref("SELECT * FROM foo WHERE bar = '$myvar'"); (which is potentially dangerous)? Even if it could make that determination, in the latter case, how would it know whether $myvar's value came from user input (unsafe) or the statement my $myvar = 'baz'; (another hard-coded literal, so safe)?

We've already got taint mode and you can set DBI to reject tainted values (DBI->connect(..., { TaintIn => 1 })), but that's about as close as you're likely to be able to get.

In reply to Re^2: Counting rows Sqlite by dsheroh
in thread Counting rows Sqlite by fanticla

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 all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others studying the Monastery: (8)
    As of 2018-06-24 20:56 GMT
    Find Nodes?
      Voting Booth?
      Should cpanminus be part of the standard Perl release?

      Results (126 votes). Check out past polls.