| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Jim Nasby <Jim(at)Nasby(dot)net> |
| Cc: | Alvaro Herrera <alvherre(at)commandprompt(dot)com>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: crash in plancache with subtransactions |
| Date: | 2010-11-01 16:25:08 |
| Message-ID: | 21519.1288628708@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Jim Nasby <Jim(at)Nasby(dot)net> writes:
> (looking at original case)... the original bug wasn't actually
> recursive.
No, there are two different cases being dealt with here. If the first
call of an expression results in an error, and then we come back and try
to re-use the expression state tree, we can have trouble because the
state tree contains partially-updated internal state for the called
function. This doesn't require any recursion but it leads to pretty
much the same problems as the recursive case.
regards, tom lane
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