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Allow insert and update tuple routing and COPY for foreign tables.

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Also enable this for postgres_fdw.

Etsuro Fujita, based on an earlier patch by Amit Langote. The larger
patch series of which this is a part has been reviewed by Amit
Langote, David Fetter, Maksim Milyutin, Álvaro Herrera, Stephen Frost,
and me.  Minor documentation changes to the final version by me.

Discussion: http://postgr.es/m/29906a26-da12-8c86-4fb9-d8f88442f2b9@lab.ntt.co.jp
This commit is contained in:
Robert Haas
2018-04-06 19:16:11 -04:00
parent cb1ff1e5af
commit 3d956d9562
16 changed files with 924 additions and 91 deletions
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23
src/backend/executor/nodeModifyTable.c
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@ -1826,11 +1826,21 @@ ExecPrepareTupleRouting(ModifyTableState *mtstate,
proute, estate,
partidx);
/* We do not yet have a way to insert into a foreign partition */
if (partrel->ri_FdwRoutine)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("cannot route inserted tuples to a foreign table")));
/*
* Set up information needed for routing tuples to the partition if we
* didn't yet (ExecInitRoutingInfo would abort the operation if the
* partition isn't routable).
*
* Note: an UPDATE of a partition key invokes an INSERT that moves the
* tuple to a new partition. This setup would be needed for a subplan
* partition of such an UPDATE that is chosen as the partition to route
* the tuple to. The reason we do this setup here rather than in
* ExecSetupPartitionTupleRouting is to avoid aborting such an UPDATE
* unnecessarily due to non-routable subplan partitions that may not be
* chosen for update tuple movement after all.
*/
if (!partrel->ri_PartitionReadyForRouting)
ExecInitRoutingInfo(mtstate, estate, proute, partrel, partidx);
/*
* Make it look like we are inserting into the partition.
@ -2531,6 +2541,7 @@ ExecInitModifyTable(ModifyTable *node, EState *estate, int eflags)
{
List *rlist = (List *) lfirst(l);
resultRelInfo->ri_returningList = rlist;
resultRelInfo->ri_projectReturning =
ExecBuildProjectionInfo(rlist, econtext, slot, &mtstate->ps,
resultRelInfo->ri_RelationDesc->rd_att);
@ -2830,7 +2841,7 @@ ExecEndModifyTable(ModifyTableState *node)
/* Close all the partitioned tables, leaf partitions, and their indices */
if (node->mt_partition_tuple_routing)
ExecCleanupTupleRouting(node->mt_partition_tuple_routing);
ExecCleanupTupleRouting(node, node->mt_partition_tuple_routing);
/*
* Free the exprcontext