Re: Printing bitmap objects in the debugger

On Wed, Sep 14, 2016 at 3:43 PM, Ashutosh Bapat <
ashutosh(dot)bapat(at)enterprisedb(dot)com> wrote:

> Hi All,
> While working on partition-wise join, I had to examine Relids objects
> many times. Printing the Bitmapset::words[] in binary format and then
> inferring the relids takes time and is error prone. Instead I wrote a
> function bms_to_char() which allocates a StringInfo, calls
> outBitmapset() to decode Bitmapset as a set of integers and returns
> the string. In order to examine a Relids object all one has to do is
> execute 'p bms_to_char(bms_object) under gdb.
>
>
Can we not do this as gdb macros? My knowledge is rusty in this area and
lately I'm using LVM debugger (which probably does not have something
equivalent), but I believe gdb allows you to write useful macros. As a
bonus, you can then use them even for inspecting core files.

Thanks,
Pavan

--
Pavan Deolasee http://www.2ndQuadrant.com/
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