Beefy Boxes and Bandwidth Generously Provided by pair Networks
Clear questions and runnable code
get the best and fastest answer
 
PerlMonks  

comment on

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

Placeholders in prepared statements can only be replaced with values, not just any string.

The fact is, the database driver parses (should parse) the query at prepare time, leaving markers for the missing values. When you substitute something, it is interpreted as a value. So, in your example, you were executing this: SELECT name FROM categories WHERE categories.workrelated = "('Y' || 'N')"; which I'm not surprised to notice didn't return any row.

The whole perparing business is intended to:

  • ease quoting
  • avoid parsing multiple similar queries
In your case, the first reason doesn't apply, and I don't think there is a way to accomplish the second.

-- 
        dakkar - Mobilis in mobile

In reply to Re: Prepared query not accepting || instruction at execution by dakkar
in thread Prepared query not accepting || instruction at execution by jpfarmer

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

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

How do I use this? | Other CB clients
Other Users?
Others about the Monastery: (5)
As of 2022-06-30 01:45 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?
    My most frequent journeys are powered by:









    Results (97 votes). Check out past polls.

    Notices?