Adding upstream version 14.5.upstream/14.5upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 852 insertions, 0 deletions

diff --git a/src/include/nodes/nodes.h b/src/include/nodes/nodes.h
new file mode 100644
index 0000000..f7b009e
--- /dev/null
+++ b/src/include/nodes/nodes.h
@@ -0,0 +1,852 @@
+/*-------------------------------------------------------------------------
+ *
+ * nodes.h
+ *	  Definitions for tagged nodes.
+ *
+ *
+ * Portions Copyright (c) 1996-2021, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/nodes/nodes.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef NODES_H
+#define NODES_H
+
+/*
+ * The first field of every node is NodeTag. Each node created (with makeNode)
+ * will have one of the following tags as the value of its first field.
+ *
+ * Note that inserting or deleting node types changes the numbers of other
+ * node types later in the list.  This is no problem during development, since
+ * the node numbers are never stored on disk.  But don't do it in a released
+ * branch, because that would represent an ABI break for extensions.
+ */
+typedef enum NodeTag
+{
+	T_Invalid = 0,
+
+	/*
+	 * TAGS FOR EXECUTOR NODES (execnodes.h)
+	 */
+	T_IndexInfo,
+	T_ExprContext,
+	T_ProjectionInfo,
+	T_JunkFilter,
+	T_OnConflictSetState,
+	T_ResultRelInfo,
+	T_EState,
+	T_TupleTableSlot,
+
+	/*
+	 * TAGS FOR PLAN NODES (plannodes.h)
+	 */
+	T_Plan,
+	T_Result,
+	T_ProjectSet,
+	T_ModifyTable,
+	T_Append,
+	T_MergeAppend,
+	T_RecursiveUnion,
+	T_BitmapAnd,
+	T_BitmapOr,
+	T_Scan,
+	T_SeqScan,
+	T_SampleScan,
+	T_IndexScan,
+	T_IndexOnlyScan,
+	T_BitmapIndexScan,
+	T_BitmapHeapScan,
+	T_TidScan,
+	T_TidRangeScan,
+	T_SubqueryScan,
+	T_FunctionScan,
+	T_ValuesScan,
+	T_TableFuncScan,
+	T_CteScan,
+	T_NamedTuplestoreScan,
+	T_WorkTableScan,
+	T_ForeignScan,
+	T_CustomScan,
+	T_Join,
+	T_NestLoop,
+	T_MergeJoin,
+	T_HashJoin,
+	T_Material,
+	T_Memoize,
+	T_Sort,
+	T_IncrementalSort,
+	T_Group,
+	T_Agg,
+	T_WindowAgg,
+	T_Unique,
+	T_Gather,
+	T_GatherMerge,
+	T_Hash,
+	T_SetOp,
+	T_LockRows,
+	T_Limit,
+	/* these aren't subclasses of Plan: */
+	T_NestLoopParam,
+	T_PlanRowMark,
+	T_PartitionPruneInfo,
+	T_PartitionedRelPruneInfo,
+	T_PartitionPruneStepOp,
+	T_PartitionPruneStepCombine,
+	T_PlanInvalItem,
+
+	/*
+	 * TAGS FOR PLAN STATE NODES (execnodes.h)
+	 *
+	 * These should correspond one-to-one with Plan node types.
+	 */
+	T_PlanState,
+	T_ResultState,
+	T_ProjectSetState,
+	T_ModifyTableState,
+	T_AppendState,
+	T_MergeAppendState,
+	T_RecursiveUnionState,
+	T_BitmapAndState,
+	T_BitmapOrState,
+	T_ScanState,
+	T_SeqScanState,
+	T_SampleScanState,
+	T_IndexScanState,
+	T_IndexOnlyScanState,
+	T_BitmapIndexScanState,
+	T_BitmapHeapScanState,
+	T_TidScanState,
+	T_TidRangeScanState,
+	T_SubqueryScanState,
+	T_FunctionScanState,
+	T_TableFuncScanState,
+	T_ValuesScanState,
+	T_CteScanState,
+	T_NamedTuplestoreScanState,
+	T_WorkTableScanState,
+	T_ForeignScanState,
+	T_CustomScanState,
+	T_JoinState,
+	T_NestLoopState,
+	T_MergeJoinState,
+	T_HashJoinState,
+	T_MaterialState,
+	T_MemoizeState,
+	T_SortState,
+	T_IncrementalSortState,
+	T_GroupState,
+	T_AggState,
+	T_WindowAggState,
+	T_UniqueState,
+	T_GatherState,
+	T_GatherMergeState,
+	T_HashState,
+	T_SetOpState,
+	T_LockRowsState,
+	T_LimitState,
+
+	/*
+	 * TAGS FOR PRIMITIVE NODES (primnodes.h)
+	 */
+	T_Alias,
+	T_RangeVar,
+	T_TableFunc,
+	T_Expr,
+	T_Var,
+	T_Const,
+	T_Param,
+	T_Aggref,
+	T_GroupingFunc,
+	T_WindowFunc,
+	T_SubscriptingRef,
+	T_FuncExpr,
+	T_NamedArgExpr,
+	T_OpExpr,
+	T_DistinctExpr,
+	T_NullIfExpr,
+	T_ScalarArrayOpExpr,
+	T_BoolExpr,
+	T_SubLink,
+	T_SubPlan,
+	T_AlternativeSubPlan,
+	T_FieldSelect,
+	T_FieldStore,
+	T_RelabelType,
+	T_CoerceViaIO,
+	T_ArrayCoerceExpr,
+	T_ConvertRowtypeExpr,
+	T_CollateExpr,
+	T_CaseExpr,
+	T_CaseWhen,
+	T_CaseTestExpr,
+	T_ArrayExpr,
+	T_RowExpr,
+	T_RowCompareExpr,
+	T_CoalesceExpr,
+	T_MinMaxExpr,
+	T_SQLValueFunction,
+	T_XmlExpr,
+	T_NullTest,
+	T_BooleanTest,
+	T_CoerceToDomain,
+	T_CoerceToDomainValue,
+	T_SetToDefault,
+	T_CurrentOfExpr,
+	T_NextValueExpr,
+	T_InferenceElem,
+	T_TargetEntry,
+	T_RangeTblRef,
+	T_JoinExpr,
+	T_FromExpr,
+	T_OnConflictExpr,
+	T_IntoClause,
+
+	/*
+	 * TAGS FOR EXPRESSION STATE NODES (execnodes.h)
+	 *
+	 * ExprState represents the evaluation state for a whole expression tree.
+	 * Most Expr-based plan nodes do not have a corresponding expression state
+	 * node, they're fully handled within execExpr* - but sometimes the state
+	 * needs to be shared with other parts of the executor, as for example
+	 * with SubPlanState, which nodeSubplan.c has to modify.
+	 */
+	T_ExprState,
+	T_WindowFuncExprState,
+	T_SetExprState,
+	T_SubPlanState,
+	T_DomainConstraintState,
+
+	/*
+	 * TAGS FOR PLANNER NODES (pathnodes.h)
+	 */
+	T_PlannerInfo,
+	T_PlannerGlobal,
+	T_RelOptInfo,
+	T_IndexOptInfo,
+	T_ForeignKeyOptInfo,
+	T_ParamPathInfo,
+	T_Path,
+	T_IndexPath,
+	T_BitmapHeapPath,
+	T_BitmapAndPath,
+	T_BitmapOrPath,
+	T_TidPath,
+	T_TidRangePath,
+	T_SubqueryScanPath,
+	T_ForeignPath,
+	T_CustomPath,
+	T_NestPath,
+	T_MergePath,
+	T_HashPath,
+	T_AppendPath,
+	T_MergeAppendPath,
+	T_GroupResultPath,
+	T_MaterialPath,
+	T_MemoizePath,
+	T_UniquePath,
+	T_GatherPath,
+	T_GatherMergePath,
+	T_ProjectionPath,
+	T_ProjectSetPath,
+	T_SortPath,
+	T_IncrementalSortPath,
+	T_GroupPath,
+	T_UpperUniquePath,
+	T_AggPath,
+	T_GroupingSetsPath,
+	T_MinMaxAggPath,
+	T_WindowAggPath,
+	T_SetOpPath,
+	T_RecursiveUnionPath,
+	T_LockRowsPath,
+	T_ModifyTablePath,
+	T_LimitPath,
+	/* these aren't subclasses of Path: */
+	T_EquivalenceClass,
+	T_EquivalenceMember,
+	T_PathKey,
+	T_PathTarget,
+	T_RestrictInfo,
+	T_IndexClause,
+	T_PlaceHolderVar,
+	T_SpecialJoinInfo,
+	T_AppendRelInfo,
+	T_RowIdentityVarInfo,
+	T_PlaceHolderInfo,
+	T_MinMaxAggInfo,
+	T_PlannerParamItem,
+	T_RollupData,
+	T_GroupingSetData,
+	T_StatisticExtInfo,
+
+	/*
+	 * TAGS FOR MEMORY NODES (memnodes.h)
+	 */
+	T_MemoryContext,
+	T_AllocSetContext,
+	T_SlabContext,
+	T_GenerationContext,
+
+	/*
+	 * TAGS FOR VALUE NODES (value.h)
+	 */
+	T_Value,
+	T_Integer,
+	T_Float,
+	T_String,
+	T_BitString,
+	T_Null,
+
+	/*
+	 * TAGS FOR LIST NODES (pg_list.h)
+	 */
+	T_List,
+	T_IntList,
+	T_OidList,
+
+	/*
+	 * TAGS FOR EXTENSIBLE NODES (extensible.h)
+	 */
+	T_ExtensibleNode,
+
+	/*
+	 * TAGS FOR STATEMENT NODES (mostly in parsenodes.h)
+	 */
+	T_RawStmt,
+	T_Query,
+	T_PlannedStmt,
+	T_InsertStmt,
+	T_DeleteStmt,
+	T_UpdateStmt,
+	T_SelectStmt,
+	T_ReturnStmt,
+	T_PLAssignStmt,
+	T_AlterTableStmt,
+	T_AlterTableCmd,
+	T_AlterDomainStmt,
+	T_SetOperationStmt,
+	T_GrantStmt,
+	T_GrantRoleStmt,
+	T_AlterDefaultPrivilegesStmt,
+	T_ClosePortalStmt,
+	T_ClusterStmt,
+	T_CopyStmt,
+	T_CreateStmt,
+	T_DefineStmt,
+	T_DropStmt,
+	T_TruncateStmt,
+	T_CommentStmt,
+	T_FetchStmt,
+	T_IndexStmt,
+	T_CreateFunctionStmt,
+	T_AlterFunctionStmt,
+	T_DoStmt,
+	T_RenameStmt,
+	T_RuleStmt,
+	T_NotifyStmt,
+	T_ListenStmt,
+	T_UnlistenStmt,
+	T_TransactionStmt,
+	T_ViewStmt,
+	T_LoadStmt,
+	T_CreateDomainStmt,
+	T_CreatedbStmt,
+	T_DropdbStmt,
+	T_VacuumStmt,
+	T_ExplainStmt,
+	T_CreateTableAsStmt,
+	T_CreateSeqStmt,
+	T_AlterSeqStmt,
+	T_VariableSetStmt,
+	T_VariableShowStmt,
+	T_DiscardStmt,
+	T_CreateTrigStmt,
+	T_CreatePLangStmt,
+	T_CreateRoleStmt,
+	T_AlterRoleStmt,
+	T_DropRoleStmt,
+	T_LockStmt,
+	T_ConstraintsSetStmt,
+	T_ReindexStmt,
+	T_CheckPointStmt,
+	T_CreateSchemaStmt,
+	T_AlterDatabaseStmt,
+	T_AlterDatabaseSetStmt,
+	T_AlterRoleSetStmt,
+	T_CreateConversionStmt,
+	T_CreateCastStmt,
+	T_CreateOpClassStmt,
+	T_CreateOpFamilyStmt,
+	T_AlterOpFamilyStmt,
+	T_PrepareStmt,
+	T_ExecuteStmt,
+	T_DeallocateStmt,
+	T_DeclareCursorStmt,
+	T_CreateTableSpaceStmt,
+	T_DropTableSpaceStmt,
+	T_AlterObjectDependsStmt,
+	T_AlterObjectSchemaStmt,
+	T_AlterOwnerStmt,
+	T_AlterOperatorStmt,
+	T_AlterTypeStmt,
+	T_DropOwnedStmt,
+	T_ReassignOwnedStmt,
+	T_CompositeTypeStmt,
+	T_CreateEnumStmt,
+	T_CreateRangeStmt,
+	T_AlterEnumStmt,
+	T_AlterTSDictionaryStmt,
+	T_AlterTSConfigurationStmt,
+	T_CreateFdwStmt,
+	T_AlterFdwStmt,
+	T_CreateForeignServerStmt,
+	T_AlterForeignServerStmt,
+	T_CreateUserMappingStmt,
+	T_AlterUserMappingStmt,
+	T_DropUserMappingStmt,
+	T_AlterTableSpaceOptionsStmt,
+	T_AlterTableMoveAllStmt,
+	T_SecLabelStmt,
+	T_CreateForeignTableStmt,
+	T_ImportForeignSchemaStmt,
+	T_CreateExtensionStmt,
+	T_AlterExtensionStmt,
+	T_AlterExtensionContentsStmt,
+	T_CreateEventTrigStmt,
+	T_AlterEventTrigStmt,
+	T_RefreshMatViewStmt,
+	T_ReplicaIdentityStmt,
+	T_AlterSystemStmt,
+	T_CreatePolicyStmt,
+	T_AlterPolicyStmt,
+	T_CreateTransformStmt,
+	T_CreateAmStmt,
+	T_CreatePublicationStmt,
+	T_AlterPublicationStmt,
+	T_CreateSubscriptionStmt,
+	T_AlterSubscriptionStmt,
+	T_DropSubscriptionStmt,
+	T_CreateStatsStmt,
+	T_AlterCollationStmt,
+	T_CallStmt,
+	T_AlterStatsStmt,
+
+	/*
+	 * TAGS FOR PARSE TREE NODES (parsenodes.h)
+	 */
+	T_A_Expr,
+	T_ColumnRef,
+	T_ParamRef,
+	T_A_Const,
+	T_FuncCall,
+	T_A_Star,
+	T_A_Indices,
+	T_A_Indirection,
+	T_A_ArrayExpr,
+	T_ResTarget,
+	T_MultiAssignRef,
+	T_TypeCast,
+	T_CollateClause,
+	T_SortBy,
+	T_WindowDef,
+	T_RangeSubselect,
+	T_RangeFunction,
+	T_RangeTableSample,
+	T_RangeTableFunc,
+	T_RangeTableFuncCol,
+	T_TypeName,
+	T_ColumnDef,
+	T_IndexElem,
+	T_StatsElem,
+	T_Constraint,
+	T_DefElem,
+	T_RangeTblEntry,
+	T_RangeTblFunction,
+	T_TableSampleClause,
+	T_WithCheckOption,
+	T_SortGroupClause,
+	T_GroupingSet,
+	T_WindowClause,
+	T_ObjectWithArgs,
+	T_AccessPriv,
+	T_CreateOpClassItem,
+	T_TableLikeClause,
+	T_FunctionParameter,
+	T_LockingClause,
+	T_RowMarkClause,
+	T_XmlSerialize,
+	T_WithClause,
+	T_InferClause,
+	T_OnConflictClause,
+	T_CTESearchClause,
+	T_CTECycleClause,
+	T_CommonTableExpr,
+	T_RoleSpec,
+	T_TriggerTransition,
+	T_PartitionElem,
+	T_PartitionSpec,
+	T_PartitionBoundSpec,
+	T_PartitionRangeDatum,
+	T_PartitionCmd,
+	T_VacuumRelation,
+
+	/*
+	 * TAGS FOR REPLICATION GRAMMAR PARSE NODES (replnodes.h)
+	 */
+	T_IdentifySystemCmd,
+	T_BaseBackupCmd,
+	T_CreateReplicationSlotCmd,
+	T_DropReplicationSlotCmd,
+	T_StartReplicationCmd,
+	T_TimeLineHistoryCmd,
+	T_SQLCmd,
+
+	/*
+	 * TAGS FOR RANDOM OTHER STUFF
+	 *
+	 * These are objects that aren't part of parse/plan/execute node tree
+	 * structures, but we give them NodeTags anyway for identification
+	 * purposes (usually because they are involved in APIs where we want to
+	 * pass multiple object types through the same pointer).
+	 */
+	T_TriggerData,				/* in commands/trigger.h */
+	T_EventTriggerData,			/* in commands/event_trigger.h */
+	T_ReturnSetInfo,			/* in nodes/execnodes.h */
+	T_WindowObjectData,			/* private in nodeWindowAgg.c */
+	T_TIDBitmap,				/* in nodes/tidbitmap.h */
+	T_InlineCodeBlock,			/* in nodes/parsenodes.h */
+	T_FdwRoutine,				/* in foreign/fdwapi.h */
+	T_IndexAmRoutine,			/* in access/amapi.h */
+	T_TableAmRoutine,			/* in access/tableam.h */
+	T_TsmRoutine,				/* in access/tsmapi.h */
+	T_ForeignKeyCacheInfo,		/* in utils/rel.h */
+	T_CallContext,				/* in nodes/parsenodes.h */
+	T_SupportRequestSimplify,	/* in nodes/supportnodes.h */
+	T_SupportRequestSelectivity,	/* in nodes/supportnodes.h */
+	T_SupportRequestCost,		/* in nodes/supportnodes.h */
+	T_SupportRequestRows,		/* in nodes/supportnodes.h */
+	T_SupportRequestIndexCondition	/* in nodes/supportnodes.h */
+} NodeTag;
+
+/*
+ * The first field of a node of any type is guaranteed to be the NodeTag.
+ * Hence the type of any node can be gotten by casting it to Node. Declaring
+ * a variable to be of Node * (instead of void *) can also facilitate
+ * debugging.
+ */
+typedef struct Node
+{
+	NodeTag		type;
+} Node;
+
+#define nodeTag(nodeptr)		(((const Node*)(nodeptr))->type)
+
+/*
+ * newNode -
+ *	  create a new node of the specified size and tag the node with the
+ *	  specified tag.
+ *
+ * !WARNING!: Avoid using newNode directly. You should be using the
+ *	  macro makeNode.  eg. to create a Query node, use makeNode(Query)
+ *
+ * Note: the size argument should always be a compile-time constant, so the
+ * apparent risk of multiple evaluation doesn't matter in practice.
+ */
+#ifdef __GNUC__
+
+/* With GCC, we can use a compound statement within an expression */
+#define newNode(size, tag) \
+({	Node   *_result; \
+	AssertMacro((size) >= sizeof(Node));		/* need the tag, at least */ \
+	_result = (Node *) palloc0fast(size); \
+	_result->type = (tag); \
+	_result; \
+})
+#else
+
+/*
+ *	There is no way to dereference the palloc'ed pointer to assign the
+ *	tag, and also return the pointer itself, so we need a holder variable.
+ *	Fortunately, this macro isn't recursive so we just define
+ *	a global variable for this purpose.
+ */
+extern PGDLLIMPORT Node *newNodeMacroHolder;
+
+#define newNode(size, tag) \
+( \
+	AssertMacro((size) >= sizeof(Node)),		/* need the tag, at least */ \
+	newNodeMacroHolder = (Node *) palloc0fast(size), \
+	newNodeMacroHolder->type = (tag), \
+	newNodeMacroHolder \
+)
+#endif							/* __GNUC__ */
+
+
+#define makeNode(_type_)		((_type_ *) newNode(sizeof(_type_),T_##_type_))
+#define NodeSetTag(nodeptr,t)	(((Node*)(nodeptr))->type = (t))
+
+#define IsA(nodeptr,_type_)		(nodeTag(nodeptr) == T_##_type_)
+
+/*
+ * castNode(type, ptr) casts ptr to "type *", and if assertions are enabled,
+ * verifies that the node has the appropriate type (using its nodeTag()).
+ *
+ * Use an inline function when assertions are enabled, to avoid multiple
+ * evaluations of the ptr argument (which could e.g. be a function call).
+ */
+#ifdef USE_ASSERT_CHECKING
+static inline Node *
+castNodeImpl(NodeTag type, void *ptr)
+{
+	Assert(ptr == NULL || nodeTag(ptr) == type);
+	return (Node *) ptr;
+}
+#define castNode(_type_, nodeptr) ((_type_ *) castNodeImpl(T_##_type_, nodeptr))
+#else
+#define castNode(_type_, nodeptr) ((_type_ *) (nodeptr))
+#endif							/* USE_ASSERT_CHECKING */
+
+
+/* ----------------------------------------------------------------
+ *					  extern declarations follow
+ * ----------------------------------------------------------------
+ */
+
+/*
+ * nodes/{outfuncs.c,print.c}
+ */
+struct Bitmapset;				/* not to include bitmapset.h here */
+struct StringInfoData;			/* not to include stringinfo.h here */
+
+extern void outNode(struct StringInfoData *str, const void *obj);
+extern void outToken(struct StringInfoData *str, const char *s);
+extern void outBitmapset(struct StringInfoData *str,
+						 const struct Bitmapset *bms);
+extern void outDatum(struct StringInfoData *str, uintptr_t value,
+					 int typlen, bool typbyval);
+extern char *nodeToString(const void *obj);
+extern char *bmsToString(const struct Bitmapset *bms);
+
+/*
+ * nodes/{readfuncs.c,read.c}
+ */
+extern void *stringToNode(const char *str);
+#ifdef WRITE_READ_PARSE_PLAN_TREES
+extern void *stringToNodeWithLocations(const char *str);
+#endif
+extern struct Bitmapset *readBitmapset(void);
+extern uintptr_t readDatum(bool typbyval);
+extern bool *readBoolCols(int numCols);
+extern int *readIntCols(int numCols);
+extern Oid *readOidCols(int numCols);
+extern int16 *readAttrNumberCols(int numCols);
+
+/*
+ * nodes/copyfuncs.c
+ */
+extern void *copyObjectImpl(const void *obj);
+
+/* cast result back to argument type, if supported by compiler */
+#ifdef HAVE_TYPEOF
+#define copyObject(obj) ((typeof(obj)) copyObjectImpl(obj))
+#else
+#define copyObject(obj) copyObjectImpl(obj)
+#endif
+
+/*
+ * nodes/equalfuncs.c
+ */
+extern bool equal(const void *a, const void *b);
+
+
+/*
+ * Typedefs for identifying qualifier selectivities and plan costs as such.
+ * These are just plain "double"s, but declaring a variable as Selectivity
+ * or Cost makes the intent more obvious.
+ *
+ * These could have gone into plannodes.h or some such, but many files
+ * depend on them...
+ */
+typedef double Selectivity;		/* fraction of tuples a qualifier will pass */
+typedef double Cost;			/* execution cost (in page-access units) */
+
+
+/*
+ * CmdType -
+ *	  enums for type of operation represented by a Query or PlannedStmt
+ *
+ * This is needed in both parsenodes.h and plannodes.h, so put it here...
+ */
+typedef enum CmdType
+{
+	CMD_UNKNOWN,
+	CMD_SELECT,					/* select stmt */
+	CMD_UPDATE,					/* update stmt */
+	CMD_INSERT,					/* insert stmt */
+	CMD_DELETE,
+	CMD_UTILITY,				/* cmds like create, destroy, copy, vacuum,
+								 * etc. */
+	CMD_NOTHING					/* dummy command for instead nothing rules
+								 * with qual */
+} CmdType;
+
+
+/*
+ * JoinType -
+ *	  enums for types of relation joins
+ *
+ * JoinType determines the exact semantics of joining two relations using
+ * a matching qualification.  For example, it tells what to do with a tuple
+ * that has no match in the other relation.
+ *
+ * This is needed in both parsenodes.h and plannodes.h, so put it here...
+ */
+typedef enum JoinType
+{
+	/*
+	 * The canonical kinds of joins according to the SQL JOIN syntax. Only
+	 * these codes can appear in parser output (e.g., JoinExpr nodes).
+	 */
+	JOIN_INNER,					/* matching tuple pairs only */
+	JOIN_LEFT,					/* pairs + unmatched LHS tuples */
+	JOIN_FULL,					/* pairs + unmatched LHS + unmatched RHS */
+	JOIN_RIGHT,					/* pairs + unmatched RHS tuples */
+
+	/*
+	 * Semijoins and anti-semijoins (as defined in relational theory) do not
+	 * appear in the SQL JOIN syntax, but there are standard idioms for
+	 * representing them (e.g., using EXISTS).  The planner recognizes these
+	 * cases and converts them to joins.  So the planner and executor must
+	 * support these codes.  NOTE: in JOIN_SEMI output, it is unspecified
+	 * which matching RHS row is joined to.  In JOIN_ANTI output, the row is
+	 * guaranteed to be null-extended.
+	 */
+	JOIN_SEMI,					/* 1 copy of each LHS row that has match(es) */
+	JOIN_ANTI,					/* 1 copy of each LHS row that has no match */
+
+	/*
+	 * These codes are used internally in the planner, but are not supported
+	 * by the executor (nor, indeed, by most of the planner).
+	 */
+	JOIN_UNIQUE_OUTER,			/* LHS path must be made unique */
+	JOIN_UNIQUE_INNER			/* RHS path must be made unique */
+
+	/*
+	 * We might need additional join types someday.
+	 */
+} JoinType;
+
+/*
+ * OUTER joins are those for which pushed-down quals must behave differently
+ * from the join's own quals.  This is in fact everything except INNER and
+ * SEMI joins.  However, this macro must also exclude the JOIN_UNIQUE symbols
+ * since those are temporary proxies for what will eventually be an INNER
+ * join.
+ *
+ * Note: semijoins are a hybrid case, but we choose to treat them as not
+ * being outer joins.  This is okay principally because the SQL syntax makes
+ * it impossible to have a pushed-down qual that refers to the inner relation
+ * of a semijoin; so there is no strong need to distinguish join quals from
+ * pushed-down quals.  This is convenient because for almost all purposes,
+ * quals attached to a semijoin can be treated the same as innerjoin quals.
+ */
+#define IS_OUTER_JOIN(jointype) \
+	(((1 << (jointype)) & \
+	  ((1 << JOIN_LEFT) | \
+	   (1 << JOIN_FULL) | \
+	   (1 << JOIN_RIGHT) | \
+	   (1 << JOIN_ANTI))) != 0)
+
+/*
+ * AggStrategy -
+ *	  overall execution strategies for Agg plan nodes
+ *
+ * This is needed in both pathnodes.h and plannodes.h, so put it here...
+ */
+typedef enum AggStrategy
+{
+	AGG_PLAIN,					/* simple agg across all input rows */
+	AGG_SORTED,					/* grouped agg, input must be sorted */
+	AGG_HASHED,					/* grouped agg, use internal hashtable */
+	AGG_MIXED					/* grouped agg, hash and sort both used */
+} AggStrategy;
+
+/*
+ * AggSplit -
+ *	  splitting (partial aggregation) modes for Agg plan nodes
+ *
+ * This is needed in both pathnodes.h and plannodes.h, so put it here...
+ */
+
+/* Primitive options supported by nodeAgg.c: */
+#define AGGSPLITOP_COMBINE		0x01	/* substitute combinefn for transfn */
+#define AGGSPLITOP_SKIPFINAL	0x02	/* skip finalfn, return state as-is */
+#define AGGSPLITOP_SERIALIZE	0x04	/* apply serialfn to output */
+#define AGGSPLITOP_DESERIALIZE	0x08	/* apply deserialfn to input */
+
+/* Supported operating modes (i.e., useful combinations of these options): */
+typedef enum AggSplit
+{
+	/* Basic, non-split aggregation: */
+	AGGSPLIT_SIMPLE = 0,
+	/* Initial phase of partial aggregation, with serialization: */
+	AGGSPLIT_INITIAL_SERIAL = AGGSPLITOP_SKIPFINAL | AGGSPLITOP_SERIALIZE,
+	/* Final phase of partial aggregation, with deserialization: */
+	AGGSPLIT_FINAL_DESERIAL = AGGSPLITOP_COMBINE | AGGSPLITOP_DESERIALIZE
+} AggSplit;
+
+/* Test whether an AggSplit value selects each primitive option: */
+#define DO_AGGSPLIT_COMBINE(as)		(((as) & AGGSPLITOP_COMBINE) != 0)
+#define DO_AGGSPLIT_SKIPFINAL(as)	(((as) & AGGSPLITOP_SKIPFINAL) != 0)
+#define DO_AGGSPLIT_SERIALIZE(as)	(((as) & AGGSPLITOP_SERIALIZE) != 0)
+#define DO_AGGSPLIT_DESERIALIZE(as) (((as) & AGGSPLITOP_DESERIALIZE) != 0)
+
+/*
+ * SetOpCmd and SetOpStrategy -
+ *	  overall semantics and execution strategies for SetOp plan nodes
+ *
+ * This is needed in both pathnodes.h and plannodes.h, so put it here...
+ */
+typedef enum SetOpCmd
+{
+	SETOPCMD_INTERSECT,
+	SETOPCMD_INTERSECT_ALL,
+	SETOPCMD_EXCEPT,
+	SETOPCMD_EXCEPT_ALL
+} SetOpCmd;
+
+typedef enum SetOpStrategy
+{
+	SETOP_SORTED,				/* input must be sorted */
+	SETOP_HASHED				/* use internal hashtable */
+} SetOpStrategy;
+
+/*
+ * OnConflictAction -
+ *	  "ON CONFLICT" clause type of query
+ *
+ * This is needed in both parsenodes.h and plannodes.h, so put it here...
+ */
+typedef enum OnConflictAction
+{
+	ONCONFLICT_NONE,			/* No "ON CONFLICT" clause */
+	ONCONFLICT_NOTHING,			/* ON CONFLICT ... DO NOTHING */
+	ONCONFLICT_UPDATE			/* ON CONFLICT ... DO UPDATE */
+} OnConflictAction;
+
+/*
+ * LimitOption -
+ *	LIMIT option of query
+ *
+ * This is needed in both parsenodes.h and plannodes.h, so put it here...
+ */
+typedef enum LimitOption
+{
+	LIMIT_OPTION_COUNT,			/* FETCH FIRST... ONLY */
+	LIMIT_OPTION_WITH_TIES,		/* FETCH FIRST... WITH TIES */
+	LIMIT_OPTION_DEFAULT,		/* No limit present */
+} LimitOption;
+
+#endif							/* NODES_H */