After some quick searches in the usual locations, I haven't found a ready-made solution to what I think of as a general problem. I have a database table (or any abstraction thereof) that I would like to allow the user to query. If it has columns A, B, C, and D, for example, it would be nice to have the user type in:

A>6 AND B<3 OR (C>5 AND B=3)

to generate a SQL query like:

select * from table where A>6 AND B<3 OR (C>5 AND B=3);
One could simply use the input as shown in a SQL where, but that doesn't allow error checking or using placeholders, both important at the application level for safety. Any thoughts on how to go about this?

Thanks,
Sean

In reply to Parsing text-based queries to SQL queries by srdst13

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.