List:Internals« Previous MessageNext Message »
From:Eric Prud'hommeaux Date:April 10 2006 4:56pm
Subject:Re: getting table meta data (primary key, in this case)
View as plain text  
On Mon, Apr 10, 2006 at 04:54:38PM +0200, Sergei Golubchik wrote:
> Hi!
> 
> First: please don't forget to cc: your questions to the list,
> so that others could benefit from the knowlegde share too.
> Also you can get faster replies, because more developers will see your
> question and will have their chance to answer.

Yep. mistake there.

> > Also, while i'm strolling around MySQL in gdb, are there any
> > toString-like methods to give a string representation of an
> > expression complile tree ala :?
> >   p sel->where->as_string()
> 
>   Item::print()
> 
> Though it uses String class, so I'm not sure you can call it from gdb
> the way you want. You can try the following workaround:
> 
>   String gdb_print_buf;
>   char *Item::gdb_print()
>   {
>     print(&gdb_print_buf);
>     return gdb_print_buf.c_ptr();
>   }

Excellent! stuck this in a header:
  extern String Global_string; // call test->print(&Global_string); p
Global_string.c_ptr(); call Global_string.free()

this in a .cc file:
  String Global_string;

and can call it repeatedly from gdb like so:
  (gdb) call test->print(&Global_string)
  (gdb) p Global_string.c_ptr()
  $11 = 0x8df42a8 "(`Orders_0`.`id` = 2186)"
  (gdb) call Global_string.free()
where test is some Item.

> Regards,
> Sergei
> 

-- 
-eric

office: +81.466.49.1170 W3C, Keio Research Institute at SFC,
                        Shonan Fujisawa Campus, Keio University,
                        5322 Endo, Fujisawa, Kanagawa 252-8520
                        JAPAN
        +1.617.258.5741 NE43-344, MIT, Cambridge, MA 02144 USA
cell:   +81.90.6533.3882

(eric@stripped)
Feel free to forward this message to any list for any purpose other than
email address distribution.

Attachment: [application/pgp-signature] Digital signature signature.asc
Thread
getting table meta data (primary key, in this case)Eric Prud'hommeaux1 Apr
  • Re: getting table meta data (primary key, in this case)SGreen3 Apr
    • Re: getting table meta data (primary key, in this case)Eric Prud'hommeaux3 Apr
      • Re: getting table meta data (primary key, in this case)Eric Prud'hommeaux5 Apr
        • RE: getting table meta data (primary key, in this case)Rick James5 Apr
          • RE: getting table meta data (primary key, in this case)Stewart Smith6 Apr
          • RE: getting table meta data (primary key, in this case)Stewart Smith6 Apr
        • Re: getting table meta data (primary key, in this case)Sergei Golubchik6 Apr
          • Re: getting table meta data (primary key, in this case)Eric Prud'hommeaux6 Apr
            • Re: getting table meta data (primary key, in this case)Sergei Golubchik10 Apr
              • Re: getting table meta data (primary key, in this case)Eric Prud'hommeaux15 Apr
                • Re: getting table meta data (primary key, in this case)Sergei Golubchik18 Apr
                • Re: getting table meta data (primary key, in this case)Sanja Byelkin18 Apr
  • Re: getting table meta data (primary key, in this case)Sergei Golubchik3 Apr
Re: getting table meta data (primary key, in this case)Sergei Golubchik10 Apr
  • Re: getting table meta data (primary key, in this case)Eric Prud'hommeaux10 Apr
    • Re: getting table meta data (primary key, in this case)Eric Prud'hommeaux11 Apr