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Re^4: Query takes 895ms in TOAD but 42s in DBI

by perrin (Chancellor)
on Dec 03, 2008 at 16:22 UTC ( #727712=note: print w/replies, xml ) Need Help??

in reply to Re^3: Query takes 895ms in TOAD but 42s in DBI
in thread Query takes 895ms in TOAD but 42s in DBI

The bind_columns approach is the fastest. You can see benchmarks on some of this here.
  • Comment on Re^4: Query takes 895ms in TOAD but 42s in DBI

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Re^5: Query takes 895ms in TOAD but 42s in DBI
by joec_ (Scribe) on Dec 04, 2008 at 10:17 UTC

    When i try to implement the above code (bind_columns), i get a "DBD::Oracle::st bind_columns failed: Statement has no result columns to bind (perhaps you need to successfully call execute first) [for Statement "DECLARE dipp PacProject.dipp_project_cur; BEGIN pacproject.get_dipp_projects(:dipp); END;" with ParamValues: :dipp=DBI::st=HASH(0x945129c)]".

    I am returning a cursor from my PLSQL. Is it possible to bind columns to a cursor?

    TIA - Joe.

      The only time I have seen this error was wheh calling bind_columns() before the execute() method. I don't quite understand your SQL because I am more of a Postgres man myself. Perhaps, someone with Oracle expetience can give a better advice. In Postgres you first declare your cursor which doesn't return any results - it's just a $dbh->do call which either succeedes or fails:
      DECLARE my_cursor AS SELECT * FROM foo ;
      Then you execute another query to begin fetching results from the cursor, for example:
      FETCH ALL FROM my_cursor;
      And it's here where I will use bind_coulumns() and fetch(). So, basically, the sql has to return rows for the bind_columns() call to work. What I don't understand is how does your original code work if the sql doesn't return any rows? Or perhaps it does but not immediately.

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