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| author | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2020-10-19 14:11:54 +0300 |
|---|---|---|
| committer | Heikki Linnakangas <heikki.linnakangas@iki.fi> | 2020-10-19 14:42:55 +0300 |
| commit | 6973533650c04653d9018f61c1ac99ecb11094bd (patch) | |
| tree | 9209fb7d616c51a3dde448a212d7443fd5d44edd /src/include/nodes/execnodes.h | |
| parent | f49b85d783f6781138f33bbe5f6e98da86907d84 (diff) | |
Revise child-to-root tuple conversion map management.
Store the tuple conversion map to convert a tuple from a child table's
format to the root format in a new ri_ChildToRootMap field in
ResultRelInfo. It is initialized if transition tuple capture for FOR
STATEMENT triggers or INSERT tuple routing on a partitioned table is
needed. Previously, ModifyTable kept the maps in the per-subplan
ModifyTableState->mt_per_subplan_tupconv_maps array, or when tuple
routing was used, in
ResultRelInfo->ri_Partitioninfo->pi_PartitionToRootMap. The new field
replaces both of those.
Now that the child-to-root tuple conversion map is always available in
ResultRelInfo (when needed), remove the TransitionCaptureState.tcs_map
field. The callers of Exec*Trigger() functions no longer need to set or
save it, which is much less confusing and bug-prone. Also, as a future
optimization, this will allow us to delay creating the map for a given
result relation until the relation is actually processed during
execution.
Author: Amit Langote
Discussion: https://www.postgresql.org/message-id/CA%2BHiwqHtCWLdK-LO%3DNEsvOdHx%2B7yv4mE_zYK0i3BH7dXb-wxog%40mail.gmail.com
Diffstat (limited to 'src/include/nodes/execnodes.h')
| -rw-r--r-- | src/include/nodes/execnodes.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/src/include/nodes/execnodes.h b/src/include/nodes/execnodes.h index dff34fbc14e..46789cb0070 100644 --- a/src/include/nodes/execnodes.h +++ b/src/include/nodes/execnodes.h @@ -486,6 +486,13 @@ typedef struct ResultRelInfo /* info for partition tuple routing (NULL if not set up yet) */ struct PartitionRoutingInfo *ri_PartitionInfo; + /* + * Map to convert child result relation tuples to the format of the table + * actually mentioned in the query (called "root"). Set only if + * transition tuple capture or update partition row movement is active. + */ + TupleConversionMap *ri_ChildToRootMap; + /* for use by copy.c when performing multi-inserts */ struct CopyMultiInsertBuffer *ri_CopyMultiInsertBuffer; } ResultRelInfo; @@ -1179,9 +1186,6 @@ typedef struct ModifyTableState /* controls transition table population for INSERT...ON CONFLICT UPDATE */ struct TransitionCaptureState *mt_oc_transition_capture; - - /* Per plan map for tuple conversion from child to root */ - TupleConversionMap **mt_per_subplan_tupconv_maps; } ModifyTableState; /* ---------------- |