Re: FailedAssertion("pd_idx == pinfo->nparts", File: "execPartition.c", Line: 1689)

On Fri, Aug 7, 2020 at 1:05 PM Justin Pryzby <pryzby(at)telsasoft(dot)com> wrote:
>
> On Fri, Aug 07, 2020 at 12:16:11PM +0900, Amit Langote wrote:
> > Curiously, Justin mentioned upthread that the crash occurred during
> > BIND of a prepared query, so it better had been that a custom plan was
> > being executed, because a generic one based on fewer partitions would
> > be thrown away due to A.I.M. invoked during AcquireExecutorLocks().
>
> Well this statement should only be executed once, and should be using
> PQexecParams and not PQexecPrepared (pygresql: pg.DB().query_prepared()).
>
> (gdb) p portal->name
> $30 = 0xf03238 ""
>
> (gdb) p portal->prepStmtName
> $31 = 0x0
>
> (gdb) p *portal->cplan
> $24 = {magic = 953717834, stmt_list = 0x682ec38, is_oneshot = false, is_saved = true, is_valid = true, planRoleId = 16554, dependsOnRole = false, saved_xmin = 0, generation = 1, refcount = 1, context = 0x682dfd0}
>
> I'm not sure why is_oneshot=false, though...

Perhaps printing *unnamed_stmt_psrc (CachedPlanSource for an unnamed
statement) would put out more information.

--
Amit Langote
EnterpriseDB: http://www.enterprisedb.com