SimpleInsertTuple.patch

*** a/src/backend/executor/nodeModifyTable.c
--- b/src/backend/executor/nodeModifyTable.c
***************
*** 1451,1453 **** ExecReScanModifyTable(ModifyTableState *node)
--- 1451,1505 ----
  	 */
  	elog(ERROR, "ExecReScanModifyTable is not implemented");
  }
+ 
+ void SimpleInsertTuple(Relation relation, HeapTuple tuple)
+ 	ResultRelInfo	*resultRelInfo;
+ 	TupleTableSlot	*slot;
+ 	TupleTableSlot	*ret;
+ 	TupleDesc 		tupdesc;
+ 	EState 			*estate = CreateExecutorState();
+ 	Oid			relation_id;
+ 
+ 	tupdesc = RelationGetDescr(relation);
+ 
+ 	/*
+ 	 * We need a ResultRelInfo so we can use the regular executor's
+ 	 * index-entry-making machinery.
+ 	 */
+ 	resultRelInfo = makeNode(ResultRelInfo);
+ 	resultRelInfo->ri_RangeTableIndex = 1;		/* dummy */
+ 	resultRelInfo->ri_RelationDesc = relation;
+ 	resultRelInfo->ri_TrigDesc = CopyTriggerDesc(relation->trigdesc);
+ 	if (resultRelInfo->ri_TrigDesc)
+ 	{
+ 		resultRelInfo->ri_TrigFunctions = (FmgrInfo *)
+ 			palloc0(resultRelInfo->ri_TrigDesc->numtriggers * sizeof(FmgrInfo));
+ 		resultRelInfo->ri_TrigWhenExprs = (List **)
+ 			palloc0(resultRelInfo->ri_TrigDesc->numtriggers * sizeof(List *));
+ 	}
+ 	resultRelInfo->ri_TrigInstrument = NULL;
+ 
+ 	ExecOpenIndices(resultRelInfo);
+ 
+ 	estate->es_result_relations = resultRelInfo;
+ 	estate->es_num_result_relations = 1;
+ 	estate->es_result_relation_info = resultRelInfo;
+ 
+ 	/* Set up a tuple slot too */
+ 	slot = ExecInitExtraTupleSlot(estate);
+ 	ExecSetSlotDescriptor(slot, tupdesc);
+ 	/* Triggers might need a slot as well */
+ 	estate->es_trig_tuple_slot = ExecInitExtraTupleSlot(estate);
+ 
+ 	ExecStoreTuple(tuple, slot, InvalidBuffer, false);
+ 	ret = ExecInsert(slot, slot, estate, false);
+ 
+ 	/* Free resources */
+ 	ExecResetTupleTable(estate->es_tupleTable, false);
+ 	ExecCloseIndices(resultRelInfo);
+ 	FreeExecutorState(estate);
+ 	RelationClose(relation);
+ 
+ 	return ret;
+ }
*** a/src/include/executor/nodeModifyTable.h
--- b/src/include/executor/nodeModifyTable.h
***************
*** 19,23 **** extern ModifyTableState *ExecInitModifyTable(ModifyTable *node, EState *estate,
--- 19,24 ----
  extern TupleTableSlot *ExecModifyTable(ModifyTableState *node);
  extern void ExecEndModifyTable(ModifyTableState *node);
  extern void ExecReScanModifyTable(ModifyTableState *node);
+ extern void SimpleInsertTuple(Relation relation, HeapTuple tuple);
  
  #endif   /* NODEMODIFYTABLE_H */