Let's have a table: 
sqlite> create table foo (foo int, bar int);
sqlite> insert into foo (foo, bar) values (1,1);
sqlite> insert into foo (foo, bar) values (1,2);
sqlite> insert into foo (foo, bar) values (1,3);

[download]
Then SELECT some data: 
sqlite> select * from foo where foo = 1 and bar in (1,2,3);
1|1
1|2
1|3

[download]
Works all right. Now I'm trying to use DBD::SQLite 1.29: 
my $sth = 
$dbh->prepare('select * from foo where foo = $1 and bar in ($2)');
$sth->execute(1, [1,2,3]);

[download]

And this gives me null results. DBI trace shows that 2nd placeholder is bound to array all right, but no score. If I join array values in a string and pass it, no result. If I flatten the array, I get predictable error of "called with N placeholders instead of 2".

I'm kinda at loss. What else is there to try besides modifying the query?

Upd: It seems that I wasn't clear enough above: I'm not trying to stuff an array into a column, I'm trying to pass it somehow to the query so that it could be used as a set of values in standard-SQL "IN" and "NOT IN" operators.

I'm perfectly aware of query rewriting option, and this is exactly what my code does presently. I don't like this approach because it's very brittle, hence my question.

Regards,
Alex.

In reply to DBD::SQLite, how to pass array in query via placeholder? by dwalin

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.