Actually, the LIMIT clause is applied before the data are retrieved, as it can influence the execution plan. Something with a LIMIT above the number of records in the table shouldn't use indexes, whereas something with a LIMIT of 1 should. See 7.2.12. How MySQL Optimizes LIMIT.

My normal rule of thumb is that placeholders work on values (field values, or values derived from them in the case of some where clauses), not parameters (limit clause, 'DESC' in the case of ordering), names (field names, table names, schema names, etc). Unfortunately, the mysql documentation doesn't seem to cover what it's allowed to replace. (There's a section in the documentation 13.7. SQL Syntax for Prepared Statements, and the closest I can find is the explaination of the various data types for placeholders in 24.2.5. C API Prepared Statement Data types)

In reply to Re^2: SQL::Statement limit clause with placeholders by jhourcle
in thread SQL::Statement limit clause with placeholders by springm

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.