I'm hacking a DBI abstraction, and I'm not sure about the side-effects of binding 42 vs "42" to a placeholder

Therefore, you need to determine whether the placeholder needs to be 42 or "42".

So I want to play safe and keep full control

Therefore, either:
1) having determined that the placeholder needs to be an integer, you provide $x + 0;
or
2) having determined that the placeholder needs to be a string, you provide "$x".

But I don't see that you would need to determine whether $x is an integer or a string.
Of course, things get a little more complex if there's a need to check the validity of the integer value, but that doesn't appear to be an issue (going by your description of the problem).

Cheers,
Rob

In reply to Re^3: Distiguishing arguments: number-strings vs real integer by syphilis
in thread Distiguishing arguments: number-strings vs real integer by LanX

Title:
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, details, 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, summary, 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.