Change the name of the Result Cache node to Memoize

"Result Cache" was never a great name for this node, but nobody managed
to come up with another name that anyone liked enough.  That was until
David Johnston mentioned "Node Memoization", which Tom Lane revised to
just "Memoize".  People seem to like "Memoize", so let's do the rename.

Reviewed-by: Justin Pryzby
Discussion: https://postgr.es/m/20210708165145.GG1176@momjian.us
Backpatch-through: 14, where Result Cache was introduced

3 files changed, 20 insertions, 20 deletions

diff --git a/src/backend/nodes/copyfuncs.c b/src/backend/nodes/copyfuncs.c
index bd87f237846..156d85f91bf 100644
--- a/src/backend/nodes/copyfuncs.c
+++ b/src/backend/nodes/copyfuncs.c
@@ -950,12 +950,12 @@ _copyMaterial(const Material *from)
 
 
 /*
- * _copyResultCache
+ * _copyMemoize
  */
-static ResultCache *
-_copyResultCache(const ResultCache *from)
+static Memoize *
+_copyMemoize(const Memoize *from)
 {
-	ResultCache *newnode = makeNode(ResultCache);
+	Memoize    *newnode = makeNode(Memoize);
 
 	/*
 	 * copy node superclass fields
@@ -5078,8 +5078,8 @@ copyObjectImpl(const void *from)
 		case T_Material:
 			retval = _copyMaterial(from);
 			break;
-		case T_ResultCache:
-			retval = _copyResultCache(from);
+		case T_Memoize:
+			retval = _copyMemoize(from);
 			break;
 		case T_Sort:
 			retval = _copySort(from);
diff --git a/src/backend/nodes/outfuncs.c b/src/backend/nodes/outfuncs.c
index e32b92e2994..db127e6ff39 100644
--- a/src/backend/nodes/outfuncs.c
+++ b/src/backend/nodes/outfuncs.c
@@ -848,9 +848,9 @@ _outMaterial(StringInfo str, const Material *node)
 }
 
 static void
-_outResultCache(StringInfo str, const ResultCache *node)
+_outMemoize(StringInfo str, const Memoize *node)
 {
-	WRITE_NODE_TYPE("RESULTCACHE");
+	WRITE_NODE_TYPE("MEMOIZE");
 
 	_outPlanInfo(str, (const Plan *) node);
 
@@ -1948,9 +1948,9 @@ _outMaterialPath(StringInfo str, const MaterialPath *node)
 }
 
 static void
-_outResultCachePath(StringInfo str, const ResultCachePath *node)
+_outMemoizePath(StringInfo str, const MemoizePath *node)
 {
-	WRITE_NODE_TYPE("RESULTCACHEPATH");
+	WRITE_NODE_TYPE("MEMOIZEPATH");
 
 	_outPathInfo(str, (const Path *) node);
 
@@ -3960,8 +3960,8 @@ outNode(StringInfo str, const void *obj)
 			case T_Material:
 				_outMaterial(str, obj);
 				break;
-			case T_ResultCache:
-				_outResultCache(str, obj);
+			case T_Memoize:
+				_outMemoize(str, obj);
 				break;
 			case T_Sort:
 				_outSort(str, obj);
@@ -4200,8 +4200,8 @@ outNode(StringInfo str, const void *obj)
 			case T_MaterialPath:
 				_outMaterialPath(str, obj);
 				break;
-			case T_ResultCachePath:
-				_outResultCachePath(str, obj);
+			case T_MemoizePath:
+				_outMemoizePath(str, obj);
 				break;
 			case T_UniquePath:
 				_outUniquePath(str, obj);
diff --git a/src/backend/nodes/readfuncs.c b/src/backend/nodes/readfuncs.c
index f0b34ecface..3deda25f156 100644
--- a/src/backend/nodes/readfuncs.c
+++ b/src/backend/nodes/readfuncs.c
@@ -2215,12 +2215,12 @@ _readMaterial(void)
 }
 
 /*
- * _readResultCache
+ * _readMemoize
  */
-static ResultCache *
-_readResultCache(void)
+static Memoize *
+_readMemoize(void)
 {
-	READ_LOCALS(ResultCache);
+	READ_LOCALS(Memoize);
 
 	ReadCommonPlan(&local_node->plan);
 
@@ -2922,8 +2922,8 @@ parseNodeString(void)
 		return_value = _readHashJoin();
 	else if (MATCH("MATERIAL", 8))
 		return_value = _readMaterial();
-	else if (MATCH("RESULTCACHE", 11))
-		return_value = _readResultCache();
+	else if (MATCH("MEMOIZE", 7))
+		return_value = _readMemoize();
 	else if (MATCH("SORT", 4))
 		return_value = _readSort();
 	else if (MATCH("INCREMENTALSORT", 15))