oqgraph-dev team mailing list archive

[Andrew McDonnell <bugs@xxxxxxxxxxxxxxxxxxx>]

perhaps cursor is invalid...?

no,

line 945... of graphcore.cc
  void oqgraph::row_ref(void *ref_ptr) throw()
  {
    reference &ref= *(reference*) ref_ptr;   <-- ref ends up having junk (0xa5a5a5a5) in it
    if (cursor)
      cursor->current(ref);
    else
      ref= reference();
  }

So, looking at what I can find on mysql:  position() gets called after each rnd_next()
So maybe our bug is in there...

So using the debugger, it appears rnd_next() is NOT called in this case?

-- 
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developers, which is a bug assignee.
https://bugs.launchpad.net/bugs/1133093

Title:
  Crash on ORDER BY in OQGRAPH v3

Status in OQGraph Engine for MariaDB:
  Triaged

Bug description:
  SELECT * FROM graph WHERE latch=1 AND origid=1 AND destid=6;
  works

  SELECT * FROM graph WHERE latch=1 AND origid=1 AND destid=6 ORDER BY seq;
  segfaults.

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