Re: debugging tools inside postgres

Shigeru Hanada <shigeru.hanada@gmail.com> writes:
> (2011/06/24 15:35), HuangQi wrote:
>> I'm trying to debug a modification for the query planner. But I found it
>> seems the data structure of my planned query is incorrect. I was trying to
>> print out the data structure by use the "p" command in gdb which is quite
>> inconvenient and takes time. May I know is there any embedded function in
>> postgres to print out the node data structures, or any other plan related
>> data structures? Thanks.

> I think nodeToString() would help.

For interactive use in gdb, I generally do
call pprint(..node pointer..)

which prints to the postmaster log.
        regards, tom lane