On Mon, Feb 15, 2021 at 4:39 PM Greg Nancarrow <[email protected]> wrote: > On Sat, Feb 13, 2021 at 12:17 AM Amit Langote <[email protected]> wrote: > > On Thu, Feb 11, 2021 at 4:43 PM Greg Nancarrow <[email protected]> wrote: > > > Actually, I tried adding the following in the loop that checks the > > > parallel-safety of each partition and it seemed to work: > > > > > > glob->relationOids = > > > lappend_oid(glob->relationOids, pdesc->oids[i]); > > > > > > Can you confirm, is that what you were referring to? > > > > Right. I had mistakenly mentioned PlannerGlobal.invalItems, sorry. > > > > Although it gets the job done, I'm not sure if manipulating > > relationOids from max_parallel_hazard() or its subroutines is okay, > > but I will let the committer decide that. As I mentioned above, the > > person who designed this decided for some reason that it is > > extract_query_dependencies()'s job to populate > > PlannerGlobal.relationOids/invalItems. > > Yes, it doesn't really seem right doing it within max_parallel_hazard(). > I tried doing it in extract_query_dependencies() instead - see > attached patch - and it seems to work, but I'm not sure if there might > be any unintended side-effects.
One issue I see with the patch is that it fails to consider
multi-level partitioning, because it's looking up partitions only in
the target table's PartitionDesc and no other.
@@ -3060,8 +3066,36 @@ extract_query_dependencies_walker(Node *node,
PlannerInfo *context)
RangeTblEntry *rte = (RangeTblEntry *) lfirst(lc);
if (rte->rtekind == RTE_RELATION)
- context->glob->relationOids =
- lappend_oid(context->glob->relationOids, rte->relid);
+ {
+ PlannerGlobal *glob;
+
+ glob = context->glob;
+ glob->relationOids =
+ lappend_oid(glob->relationOids, rte->relid);
+ if (query->commandType == CMD_INSERT &&
+ rte->relkind == RELKIND_PARTITIONED_TABLE)
The RTE whose relkind is being checked here may not be the INSERT
target relation's RTE, even though that's perhaps always true today.
So, I suggest to pull the new block out of the loop over rtable and
perform its deeds on the result RTE explicitly fetched using
rt_fetch(), preferably using a separate recursive function. I'm
thinking something like the attached revised version.
--
Amit Langote
EDB: http://www.enterprisedb.com
setrefs-v2.patch
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