Matt Magoffin <postgresql.org@xxxxxxx> writes: > Any ideas what I’m doing wrong here? The source is available here: > https://github.com/SolarNetwork/aggs_for_vecs/blob/9e742cdc32a113268fd3c1f928c8ac724acec9f5/vec_agg_mean.c Hmm, I think you're abusing the ArrayBuildState API. In particular, what guarantees that the astate->dvalues and astate->dnulls arrays are long enough for what you're stuffing into them? You should probably palloc temp arrays right here and then use construct_md_array directly instead of dealing with an ArrayBuildState. Also, I wonder what happens when state->vec_counts[i] is zero. That's seemingly not your problem right now, since the ereport(NOTICE) is being reached; but it sure looks like trouble waiting to happen. regards, tom lane
