Re: LATERAL

On Sat, Dec 19, 2009 at 4:46 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Robert Haas <robertmhaas@gmail.com> writes:
>> On Sat, Dec 19, 2009 at 3:01 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>>> I believe the correct approach is probably to treat values that need to
>>> be propagated into the inner side as executor parameters.  This could
>>> replace the existing, rather crocky, management of values passed into a
>>> nestloop inner indexscan.
>
>> What is the best place to look for the existing, rather crocky code?
>
> Follow the second argument of ExecReScan from nodeNestloop to
> nodeIndexscan.

Yeah, this is grotty.  It appears that the comment introducing
ExecReScan() is somewhat incorrect.  It asserts that exprCtxt is used
only