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Generalize ri_RootToPartitionMap to use for non-partition children

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ri_RootToPartitionMap is currently only initialized for tuple routing
target partitions, though a future commit will need the ability to use
it even for the non-partition child tables, so make adjustments to the
decouple it from the partitioning code.

Also, make it lazily initialized via ExecGetRootToChildMap(), making
that function its preferred access path.  Existing third-party code
accessing it directly should no longer do so; consequently, it's been
renamed to ri_RootToChildMap, which also makes it consistent with
ri_ChildToRootMap.

ExecGetRootToChildMap() houses the logic of setting the map appropriately
depending on whether a given child relation is partition or not.

To support this, also add a separate entry point for TupleConversionMap
creation that receives an AttrMap.  No new code here, just split an
existing function in two.

Author: Amit Langote <amitlangote09@gmail.com>
Discussion: https://postgr.es/m/CA+HiwqEYUhDXSK5BTvG_xk=eaAEJCD4GS3C6uH7ybBvv+Z_Tmg@mail.gmail.com
This commit is contained in:
Alvaro Herrera
2022-12-02 10:35:55 +01:00
parent 40b1491357
commit fb958b5da8
10 changed files with 107 additions and 52 deletions
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4
src/backend/replication/logical/worker.c
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@@ -2193,7 +2193,7 @@ apply_handle_tuple_routing(ApplyExecutionData *edata,
remoteslot_part = partrelinfo->ri_PartitionTupleSlot;
if (remoteslot_part == NULL)
remoteslot_part = table_slot_create(partrel, &estate->es_tupleTable);
map = partrelinfo->ri_RootToPartitionMap;
map = ExecGetRootToChildMap(partrelinfo, estate);
if (map != NULL)
{
attrmap = map->attrMap;
@@ -2353,7 +2353,7 @@ apply_handle_tuple_routing(ApplyExecutionData *edata,
if (remoteslot_part == NULL)
remoteslot_part = table_slot_create(partrel_new,
&estate->es_tupleTable);
map = partrelinfo_new->ri_RootToPartitionMap;
map = ExecGetRootToChildMap(partrelinfo_new, estate);
if (map != NULL)
{
remoteslot_part = execute_attr_map_slot(map->attrMap,