const RelFileNode *newrnode);
 
        /* See table_relation_copy_for_cluster() */
-       void            (*relation_copy_for_cluster) (Relation NewHeap,
-                                                                                         Relation OldHeap,
+       void            (*relation_copy_for_cluster) (Relation NewTable,
+                                                                                         Relation OldTable,
                                                                                          Relation OldIndex,
                                                                                          bool use_sort,
                                                                                          TransactionId OldestXmin,
                                                                                        TupleTableSlot *slot);
 
        /* see table_index_build_range_scan for reference about parameters */
-       double          (*index_build_range_scan) (Relation heap_rel,
+       double          (*index_build_range_scan) (Relation table_rel,
                                                                                   Relation index_rel,
-                                                                                  struct IndexInfo *index_nfo,
+                                                                                  struct IndexInfo *index_info,
                                                                                   bool allow_sync,
                                                                                   bool anyvisible,
                                                                                   bool progress,
                                                                                   TableScanDesc scan);
 
        /* see table_index_validate_scan for reference about parameters */
-       void            (*index_validate_scan) (Relation heap_rel,
+       void            (*index_validate_scan) (Relation table_rel,
                                                                                Relation index_rel,
                                                                                struct IndexInfo *index_info,
                                                                                Snapshot snapshot,
 }
 
 /*
- * Copy data from `OldHeap` into `NewHeap`, as part of a CLUSTER or VACUUM
+ * Copy data from `OldTable` into `NewTable`, as part of a CLUSTER or VACUUM
  * FULL.
  *
  * Additional Input parameters:
  * - *tups_recently_dead - stats, for logging, if appropriate for AM
  */
 static inline void
-table_relation_copy_for_cluster(Relation OldHeap, Relation NewHeap,
+table_relation_copy_for_cluster(Relation OldTable, Relation NewTable,
                                                                Relation OldIndex,
                                                                bool use_sort,
                                                                TransactionId OldestXmin,
                                                                double *tups_vacuumed,
                                                                double *tups_recently_dead)
 {
-       OldHeap->rd_tableam->relation_copy_for_cluster(OldHeap, NewHeap, OldIndex,
-                                                                                                  use_sort, OldestXmin,
-                                                                                                  xid_cutoff, multi_cutoff,
-                                                                                                  num_tuples, tups_vacuumed,
-                                                                                                  tups_recently_dead);
+       OldTable->rd_tableam->relation_copy_for_cluster(OldTable, NewTable, OldIndex,
+                                                                                                       use_sort, OldestXmin,
+                                                                                                       xid_cutoff, multi_cutoff,
+                                                                                                       num_tuples, tups_vacuumed,
+                                                                                                       tups_recently_dead);
 }
 
 /*
  * table_index_build_scan - scan the table to find tuples to be indexed
  *
  * This is called back from an access-method-specific index build procedure
- * after the AM has done whatever setup it needs.  The parent heap relation
+ * after the AM has done whatever setup it needs.  The parent table relation
  * is scanned to find tuples that should be entered into the index.  Each
  * such tuple is passed to the AM's callback routine, which does the right
  * things to add it to the new index.  After we return, the AM's index
  * for other AMs later.
  */
 static inline double
-table_index_build_scan(Relation heap_rel,
+table_index_build_scan(Relation table_rel,
                                           Relation index_rel,
-                                          struct IndexInfo *index_nfo,
+                                          struct IndexInfo *index_info,
                                           bool allow_sync,
                                           bool progress,
                                           IndexBuildCallback callback,
                                           void *callback_state,
                                           TableScanDesc scan)
 {
-       return heap_rel->rd_tableam->index_build_range_scan(heap_rel,
-                                                                                                               index_rel,
-                                                                                                               index_nfo,
-                                                                                                               allow_sync,
-                                                                                                               false,
-                                                                                                               progress,
-                                                                                                               0,
-                                                                                                               InvalidBlockNumber,
-                                                                                                               callback,
-                                                                                                               callback_state,
-                                                                                                               scan);
+       return table_rel->rd_tableam->index_build_range_scan(table_rel,
+                                                                                                                index_rel,
+                                                                                                                index_info,
+                                                                                                                allow_sync,
+                                                                                                                false,
+                                                                                                                progress,
+                                                                                                                0,
+                                                                                                                InvalidBlockNumber,
+                                                                                                                callback,
+                                                                                                                callback_state,
+                                                                                                                scan);
 }
 
 /*
  * transactions that are still in progress.
  */
 static inline double
-table_index_build_range_scan(Relation heap_rel,
+table_index_build_range_scan(Relation table_rel,
                                                         Relation index_rel,
-                                                        struct IndexInfo *index_nfo,
+                                                        struct IndexInfo *index_info,
                                                         bool allow_sync,
                                                         bool anyvisible,
                                                         bool progress,
                                                         void *callback_state,
                                                         TableScanDesc scan)
 {
-       return heap_rel->rd_tableam->index_build_range_scan(heap_rel,
-                                                                                                               index_rel,
-                                                                                                               index_nfo,
-                                                                                                               allow_sync,
-                                                                                                               anyvisible,
-                                                                                                               progress,
-                                                                                                               start_blockno,
-                                                                                                               numblocks,
-                                                                                                               callback,
-                                                                                                               callback_state,
-                                                                                                               scan);
+       return table_rel->rd_tableam->index_build_range_scan(table_rel,
+                                                                                                                index_rel,
+                                                                                                                index_info,
+                                                                                                                allow_sync,
+                                                                                                                anyvisible,
+                                                                                                                progress,
+                                                                                                                start_blockno,
+                                                                                                                numblocks,
+                                                                                                                callback,
+                                                                                                                callback_state,
+                                                                                                                scan);
 }
 
 /*
  * See validate_index() for an explanation.
  */
 static inline void
-table_index_validate_scan(Relation heap_rel,
+table_index_validate_scan(Relation table_rel,
                                                  Relation index_rel,
                                                  struct IndexInfo *index_info,
                                                  Snapshot snapshot,
                                                  struct ValidateIndexState *state)
 {
-       heap_rel->rd_tableam->index_validate_scan(heap_rel,
-                                                                                         index_rel,
-                                                                                         index_info,
-                                                                                         snapshot,
-                                                                                         state);
+       table_rel->rd_tableam->index_validate_scan(table_rel,
+                                                                                          index_rel,
+                                                                                          index_info,
+                                                                                          snapshot,
+                                                                                          state);
 }