Beefy Boxes and Bandwidth Generously Provided by pair Networks
XP is just a number
 
PerlMonks  

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

If execute is taking a long time, that's an indication that your query is problematic. Remember, the database has to identify the result set before it will start to return any rows. Try running your query interactively (using command line or MySQL/CC or phpMyAdmin or something similar). If it's slow, you'll need to fix that first.

It's impossible to tell without knowing the data model and schema, but just from your variable names, I'm guessing you're building a cartesian product from a many-to-many relationship. That can produce a huge number of rows, so make sure you've restricted the set that you're selecting from (in other words, add more conditions to your where clause). If you can't restrict it, you may be SOL: you're asking for a ton of data, but you don't want to take any time to retrieve it, which is an impossible combination.


In reply to Re: DBI/mysql gathering all rows on execute by VSarkiss
in thread DBI/mysql gathering all rows on execute by sgifford

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, 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?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others surveying the Monastery: (5)
    As of 2020-01-29 11:09 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      Notices?