Re: [BUGS] [Fwd: ERROR: cannot extract system attribute from minimal tuple]

Wed, 09 Feb 2011 19:37:59 -0800 

Alvaro Herrera <[email protected]> writes:
> Hmm, yeah, in an assert-enabled build of HEAD it dies with:

> TRAP: FailedAssertion(«!(attno > 0)», Archivo: 
> «/pgsql/source/HEAD/src/backend/executor/execJunk.c», Línea: 251)

> I don't have time to track this down right now ...

It's a shortcoming in the PlanRowMark+resjunk column data structure:
when we flatten subqueries, the rangetable indexes of the relations
to be row-locked can change, but the resjunk column names already
assigned to represent their ctid's aren't updated.  Working on a
fix now.

                        regards, tom lane

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