On Mon, Sep 26, 2011 at 11:40 AM, Robert Haas <robertmh...@gmail.com> wrote:
> To check my work, I did this:
>
> --- a/src/backend/executor/execQual.c
> +++ b/src/backend/executor/execQual.c
> @@ -5003,6 +5003,7 @@ ExecQual(List *qual, ExprContext *econtext, bool
> resultForNull)
> Datum expr_value;
> bool isNull;
>
> + Assert(!IsA(clause, List));
> expr_value = ExecEvalExpr(clause, econtext, &isNull, NULL);
>
> if (isNull)
>
> And in fact the test case (when run against the unlogged tables) fails
> that assertion:
>
> TRAP: FailedAssertion("!(!((((Node*)(clause))->type) == T_List))",
> File: "execQual.c", Line: 5006)
>
> Now I'm not too sure why that is happening yet, but I'm leaning toward
> the idea that the bug here is timing-related and that unlogged tables
> aren't the cause, but rather just make it easier to hit whatever the
> race condition is by removing some overhead.
I cannot reproduce this on commit
e6faf910d75027bdce7cd0f2033db4e912592bcc. But on the very next commit
I can:
commit e6faf910d75027bdce7cd0f2033db4e912592bcc
Author: Tom Lane <t...@sss.pgh.pa.us>
Date: Fri Sep 16 00:42:53 2011 -0400
Redesign the plancache mechanism for more flexibility and efficiency.
Tom, any thoughts?
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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