I learned something: If the number of rows affected is not known, then execute() returns -1. Usually with an SQL statement (UPDATE or whatever), the number of rows affected will be known. This is different because of the execution of a stored procedure.

In my experience, it is relatively easy to translate working command line SQL code into Perl code. I would like to see the command line SQL statements that are claimed to "work".

Update: As I wrote earlier, I've never seen -1 (unknown number of rows affected). A normal SQL UPDATE or INSERT knows that number. The DBI can return the string value of 0EO which evaluates to "true" in a scalar context but is numerically zero in a math context or a number representing the number of rows affected. As I learned, in this situation, a negative number could be returned.

I HIGHLY recommend that you work from the SQL command line to get a valid result. Once you have that, we can make Perl do the same thing. Once we are past that, other optimization can be done about error conditions. Start from known working SQL code. Make Perl do the same thing that you know works. Then go from there.

In reply to Re^5: Multiple records fetches issue using DBD::ODBC in Perl by Marshall
in thread Multiple records fetches issue using DBD::ODBC in Perl by maria80e

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.