Remove T_Join and T_Plan

These are abstract node types that don't need to have a node tag
defined.

Discussion: https://www.postgresql.org/message-id/2592455.1657140387%40sss.pgh.pa.us

src/backend/nodes/copyfuncs.c

@@ -138,23 +138,6 @@ CopyPlanFields(const Plan *from, Plan *newnode)
 	COPY_BITMAPSET_FIELD(allParam);
 }
 
-/*
- * _copyPlan
- */
-static Plan *
-_copyPlan(const Plan *from)
-{
-	Plan	   *newnode = makeNode(Plan);
-
-	/*
-	 * copy node superclass fields
-	 */
-	CopyPlanFields(from, newnode);
-
-	return newnode;
-}
-
-
 /*
  * _copyResult
  */
@@ -844,23 +827,6 @@ CopyJoinFields(const Join *from, Join *newnode)
 }
 
 
-/*
- * _copyJoin
- */
-static Join *
-_copyJoin(const Join *from)
-{
-	Join	   *newnode = makeNode(Join);
-
-	/*
-	 * copy node superclass fields
-	 */
-	CopyJoinFields(from, newnode);
-
-	return newnode;
-}
-
-
 /*
  * _copyNestLoop
  */
@@ -5571,9 +5537,6 @@ copyObjectImpl(const void *from)
 		case T_PlannedStmt:
 			retval = _copyPlannedStmt(from);
 			break;
-		case T_Plan:
-			retval = _copyPlan(from);
-			break;
 		case T_Result:
 			retval = _copyResult(from);
 			break;
@@ -5658,9 +5621,6 @@ copyObjectImpl(const void *from)
 		case T_CustomScan:
 			retval = _copyCustomScan(from);
 			break;
-		case T_Join:
-			retval = _copyJoin(from);
-			break;
 		case T_NestLoop:
 			retval = _copyNestLoop(from);
 			break;

src/backend/nodes/outfuncs.c

@@ -386,15 +386,6 @@ _outJoinPlanInfo(StringInfo str, const Join *node)
 	WRITE_NODE_FIELD(joinqual);
 }
 
-
-static void
-_outPlan(StringInfo str, const Plan *node)
-{
-	WRITE_NODE_TYPE("PLAN");
-
-	_outPlanInfo(str, (const Plan *) node);
-}
-
 static void
 _outResult(StringInfo str, const Result *node)
 {
@@ -750,14 +741,6 @@ _outCustomScan(StringInfo str, const CustomScan *node)
 	outToken(str, node->methods->CustomName);
 }
 
-static void
-_outJoin(StringInfo str, const Join *node)
-{
-	WRITE_NODE_TYPE("JOIN");
-
-	_outJoinPlanInfo(str, (const Join *) node);
-}
-
 static void
 _outNestLoop(StringInfo str, const NestLoop *node)
 {
@@ -4058,9 +4041,6 @@ outNode(StringInfo str, const void *obj)
 			case T_PlannedStmt:
 				_outPlannedStmt(str, obj);
 				break;
-			case T_Plan:
-				_outPlan(str, obj);
-				break;
 			case T_Result:
 				_outResult(str, obj);
 				break;
@@ -4145,9 +4125,6 @@ outNode(StringInfo str, const void *obj)
 			case T_CustomScan:
 				_outCustomScan(str, obj);
 				break;
-			case T_Join:
-				_outJoin(str, obj);
-				break;
 			case T_NestLoop:
 				_outNestLoop(str, obj);
 				break;

src/backend/nodes/readfuncs.c

@@ -1859,19 +1859,6 @@ ReadCommonPlan(Plan *local_node)
 	READ_BITMAPSET_FIELD(allParam);
 }
 
-/*
- * _readPlan
- */
-static Plan *
-_readPlan(void)
-{
-	READ_LOCALS_NO_FIELDS(Plan);
-
-	ReadCommonPlan(local_node);
-
-	READ_DONE();
-}
-
 /*
  * _readResult
  */
@@ -2362,19 +2349,6 @@ ReadCommonJoin(Join *local_node)
 	READ_NODE_FIELD(joinqual);
 }
 
-/*
- * _readJoin
- */
-static Join *
-_readJoin(void)
-{
-	READ_LOCALS_NO_FIELDS(Join);
-
-	ReadCommonJoin(local_node);
-
-	READ_DONE();
-}
-
 /*
  * _readNestLoop
  */
@@ -3099,8 +3073,6 @@ parseNodeString(void)
 		return_value = _readDeclareCursorStmt();
 	else if (MATCH("PLANNEDSTMT", 11))
 		return_value = _readPlannedStmt();
-	else if (MATCH("PLAN", 4))
-		return_value = _readPlan();
 	else if (MATCH("RESULT", 6))
 		return_value = _readResult();
 	else if (MATCH("PROJECTSET", 10))
@@ -3153,8 +3125,6 @@ parseNodeString(void)
 		return_value = _readForeignScan();
 	else if (MATCH("CUSTOMSCAN", 10))
 		return_value = _readCustomScan();
-	else if (MATCH("JOIN", 4))
-		return_value = _readJoin();
 	else if (MATCH("NESTLOOP", 8))
 		return_value = _readNestLoop();
 	else if (MATCH("MERGEJOIN", 9))

src/include/catalog/catversion.h

@@ -53,6 +53,6 @@
  */
 
 /*							yyyymmddN */
-#define CATALOG_VERSION_NO	202207052
+#define CATALOG_VERSION_NO	202207081
 
 #endif

src/include/nodes/nodes.h

@@ -43,7 +43,6 @@ typedef enum NodeTag
 	/*
 	 * TAGS FOR PLAN NODES (plannodes.h)
 	 */
-	T_Plan,
 	T_Result,
 	T_ProjectSet,
 	T_ModifyTable,
@@ -70,7 +69,6 @@ typedef enum NodeTag
 	T_WorkTableScan,
 	T_ForeignScan,
 	T_CustomScan,
-	T_Join,
 	T_NestLoop,
 	T_MergeJoin,
 	T_HashJoin,

src/test/modules/test_oat_hooks/test_oat_hooks.c

@@ -468,9 +468,6 @@ nodetag_to_string(NodeTag tag)
 		case T_TupleTableSlot:
 			return "TupleTableSlot";
 			break;
-		case T_Plan:
-			return "Plan";
-			break;
 		case T_Result:
 			return "Result";
 			break;
@@ -549,9 +546,6 @@ nodetag_to_string(NodeTag tag)
 		case T_CustomScan:
 			return "CustomScan";
 			break;
-		case T_Join:
-			return "Join";
-			break;
 		case T_NestLoop:
 			return "NestLoop";
 			break;