This is why my favorite DBI method is selectall_arrayref with the attribute Slice set

  my $rows= $dbh->selectall_arrayref( "SELECT * FROM table", { Slice =
+> {} } );

[download]

Sure it looks wonky and pretentious but this approach gives my an array reference of hash references where the hash key is the column name and the values are well, the data values. Now you can just use perl to get the size:

  printf "Executed Statement - returned (%d) rows\n", scalar( @$rows )
+;

[download]

As a developer the concept of prepare, execute, and fetch is alluring and I can see its' value in certain situations but pragmatically, wrapping those steps into one is the common case with re-use of statement handle being the uncommon case (and for the future comments, I said uncommon - not rare). I am aware of the downsides to this approach such as the result set being too large and needing to be fetched in smaller batch sizes but I find a lot of the downsides to be outlier cases that are rarely hit (at least for my domain).

-derby

In reply to Re: SQLite: how to get a number of rows from SELECT query by derby
in thread SQLite: how to get a number of rows from SELECT query by igoryonya

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.