Beefy Boxes and Bandwidth Generously Provided by pair Networks
"be consistent"

comment on

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

the syntax

select ? from ... where ..

isn't valid SQL.

Are you sure? Any links to documents that specify that?

At least SQLite accepts it:

#!/usr/bin/perl use strict; use warnings; use DBI; my $dbh=DBI->connect('dbi:SQLite:dbname=/tmp/foo.sqlite','','',{ Raise +Error => 1 }); my $sth=$dbh->prepare('select ? as answer'); $sth->execute(42); $sth->dump_results();
'42' 1 rows

PostgreSQL can't determinate the column type without a little help, but accepts it with type information. SQLite has a very relaxed relation to data types, so it is no surprise that SQLite does NOT need help.

#!/usr/bin/perl use strict; use warnings; use DBI qw( SQL_INTEGER ); my $dbh=DBI->connect('dbi:Pg:dbname=postgres','postgres','postgres',{ +RaiseError => 1 }); my $sth=$dbh->prepare('select ? as answer'); $sth->bind_param(1,42,SQL_INTEGER); $sth->execute(); $sth->dump_results();
42 1 rows


Today I will gladly share my knowledge and experience, for there are no sweeter words than "I told you so". ;-)

In reply to Re^2: fetchall_arrayref hangs with placeholders query with no results by afoken
in thread fetchall_arrayref hangs with placeholders query with no results by TieUpYourCamel

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 How to display code and escape characters are good places to start.
Log In?

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

How do I use this?Last hourOther CB clients
Other Users?
Others contemplating the Monastery: (3)
As of 2023-12-02 12:37 GMT
Find Nodes?
    Voting Booth?
    What's your preferred 'use VERSION' for new CPAN modules in 2023?

    Results (16 votes). Check out past polls.