Beefy Boxes and Bandwidth Generously Provided by pair Networks
The stupid question is the question not asked
 
PerlMonks  

Comment on

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

I have a module where I would like to take a given $dbh in DBI, and a given SQL statement, and programatically obtain the list of database objects (tables and views) that this query accesses. I could use SQL::Statement but I worry that I will need to support SQL syntax features that it doesn't (for example, subselects in the FROM clause). So I would like to somehow pass the statement to the database itself and get the information that way. For example, I would feed it

SELECT * FROM foo JOIN bar ON foo.a = bar.a JOIN (SELECT * FROM baz where something_or_other) as mysub1 ON foo.z = + mysub1.z WHERE foo.b in (SELECT y+1 FROM quux)
and it would give me back a list like ('foo','bar','baz','quux') My database is Oracle, so if no generic solution exists, I could happily live with an Oracle-specific one.

As an addendum, I should add that I also looked at using EXPLAIN PLAN and just querying the object names from the plan table, but I discovered that if my query uses views it would give me the underlying table names, whereas what I need are the view names.


In reply to DBI: Identify schema objects for a statement by Errto

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!
  • 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 perusing the Monastery: (14)
    As of 2015-07-31 18:07 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      The top three priorities of my open tasks are (in descending order of likelihood to be worked on) ...









      Results (280 votes), past polls