Re: v12.0 ERROR: trying to store a heap tuple into wrong type of slot

Hi,

On 2019-10-13 07:51:06 -0700, Andres Freund wrote:
> On 2019-10-11 16:03:20 -0500, Justin Pryzby wrote:
> > I'm not sure why we have that index, and my script probably should have known
> > to choose a better one to cluster on, but still..
> >
> > ts=# CLUSTER huawei_m2000_config_enodebcell_enodeb USING huawei_m2000_config_enodebcell_enodeb_coalesce_idx ;
> > DEBUG: 00000: building index "pg_toast_1840151315_index" on table "pg_toast_1840151315" serially
> > LOCATION: index_build, index.c:2791
> > DEBUG: 00000: clustering "public.huawei_m2000_config_enodebcell_enodeb" using sequential scan and sort
> > LOCATION: copy_table_data, cluster.c:907
> > ERROR: XX000: trying to store a heap tuple into wrong type of slot
> > LOCATION: ExecStoreHeapTuple, execTuples.c:1328
>
> Well, that's annoying. There apparently is not a single test covering
> cluster on expression indexes, that' really ought to not be the
> case. Equally annoying that I just broke this without noticing at all
> :(.
>
> The cause of the error is that, while that sounds like it should be the
> case, a virtual slot isn't sufficient for tuplesort_begin_cluster(). So
> the fix is pretty trivial. Will fix.

I pushed the fix, including a few tests, a few hours ago. I hope that
fixes the issue for you?

Greetings,

Andres Freund