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/*-------------------------------------------------------------------------
*
* nodes.h--
* Definitions for tagged nodes.
*
*
* Copyright (c) 1994, Regents of the University of California
*
* $Id: nodes.h,v 1.1.1.1 1996/07/09 06:21:33 scrappy Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef NODES_H
#define NODES_H
#include "c.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 the number of the node tags are not contiguous. We left holes
* here so that we can add more tags without changing the existing enum's.
*/
typedef enum NodeTag {
T_Invalid = 0,
/*---------------------
* TAGS FOR PLAN NODES (plannodes.h)
*---------------------
*/
T_Plan = 10,
T_Existential,
T_Result,
T_Append,
T_Scan,
T_SeqScan,
T_IndexScan,
T_Join,
T_NestLoop,
T_MergeJoin,
T_HashJoin,
T_Temp,
T_Material,
T_Sort,
T_Agg,
T_Unique,
T_Hash,
T_Choose,
T_Tee,
T_Group,
/*---------------------
* TAGS FOR PRIMITIVE NODES (primnodes.h)
*---------------------
*/
T_Resdom = 100,
T_Fjoin,
T_Expr,
T_Var,
T_Oper,
T_Const,
T_Param,
T_Aggreg,
T_Func,
T_Array,
T_ArrayRef,
/*---------------------
* TAGS FOR INNER PLAN NODES (relation.h)
*---------------------
*/
T_Rel = 200,
T_Path,
T_IndexPath,
T_JoinPath,
T_MergePath,
T_HashPath,
T_OrderKey,
T_JoinKey,
T_MergeOrder,
T_CInfo,
T_JoinMethod,
T_HInfo,
T_MInfo,
T_JInfo,
T_Iter,
T_Stream,
/*---------------------
* TAGS FOR EXECUTOR NODES (execnodes.h)
*---------------------
*/
T_IndexInfo = 300,
T_RelationInfo,
T_TupleCount,
T_TupleTableSlot,
T_ExprContext,
T_ProjectionInfo,
T_JunkFilter,
T_EState,
T_BaseNode,
T_CommonState,
T_ResultState,
T_AppendState,
T_CommonScanState,
T_ScanState,
T_IndexScanState,
T_JoinState,
T_NestLoopState,
T_MergeJoinState,
T_HashJoinState,
T_MaterialState,
T_AggState,
T_GroupState,
T_SortState,
T_UniqueState,
T_HashState,
T_TeeState,
/*---------------------
* TAGS FOR MEMORY NODES (memnodes.h)
*---------------------
*/
T_MemoryContext = 400,
T_GlobalMemory,
T_PortalMemoryContext,
T_PortalVariableMemory,
T_PortalHeapMemory,
/*---------------------
* TAGS FOR VALUE NODES (pg_list.h)
*---------------------
*/
T_Value = 500,
T_List,
T_Integer,
T_Float,
T_String,
T_Null,
/*---------------------
* TAGS FOR PARSE TREE NODES (parsenode.h)
*---------------------
*/
T_Query = 600,
T_AppendStmt,
T_DeleteStmt,
T_ReplaceStmt,
T_CursorStmt,
T_RetrieveStmt,
T_AddAttrStmt,
T_AggregateStmt,
T_ChangeACLStmt,
T_ClosePortalStmt,
T_ClusterStmt,
T_CopyStmt,
T_CreateStmt,
T_VersionStmt,
T_DefineStmt,
T_DestroyStmt,
T_ExtendStmt,
T_FetchStmt,
T_IndexStmt,
T_MoveStmt,
T_ProcedureStmt,
T_PurgeStmt,
T_RecipeStmt,
T_RemoveFuncStmt,
T_RemoveOperStmt,
T_RemoveStmt,
T_RenameStmt,
T_RuleStmt,
T_NotifyStmt,
T_ListenStmt,
T_TransactionStmt,
T_ViewStmt,
T_LoadStmt,
T_CreatedbStmt,
T_DestroydbStmt,
T_VacuumStmt,
T_ExplainStmt,
T_A_Expr = 700,
T_Attr,
T_A_Const,
T_ParamNo,
T_Ident,
T_FuncCall,
T_A_Indices,
T_ResTarget,
T_ParamString,
T_TimeRange,
T_RelExpr,
T_SortBy,
T_RangeVar,
T_TypeName,
T_IndexElem,
T_ColumnDef,
T_DefElem,
T_TargetEntry,
T_RangeTblEntry,
T_SortClause,
T_GroupClause
} NodeTag;
/*
* The first field of a node of any type is gauranteed 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(_node_) ((Node*)_node_)->type
#define makeNode(_node_) (_node_*)newNode(sizeof(_node_),T_##_node_)
#define NodeSetTag(n, t) ((Node *)n)->type = t
#define IsA(_node_,_tag_) (nodeTag(_node_) == T_##_tag_)
/* ----------------------------------------------------------------
* IsA functions (no inheritence any more)
* ----------------------------------------------------------------
*/
#define IsA_JoinPath(jp) \
(nodeTag(jp)==T_JoinPath || nodeTag(jp)==T_MergePath || \
nodeTag(jp)==T_HashPath)
#define IsA_Join(j) \
(nodeTag(j)==T_Join || nodeTag(j)==T_NestLoop || \
nodeTag(j)==T_MergeJoin || nodeTag(j)==T_HashJoin)
#define IsA_Temp(t) \
(nodeTag(t)==T_Temp || nodeTag(t)==T_Material || nodeTag(t)==T_Sort || \
nodeTag(t)==T_Unique)
/* ----------------------------------------------------------------
* extern declarations follow
* ----------------------------------------------------------------
*/
/*
* nodes/nodes.c
*/
extern Node *newNode(Size size, NodeTag tag);
/*
* nodes/{outfuncs.c,print.c}
*/
#define nodeDisplay print
extern char *nodeToString(void *obj);
extern void print(void *obj);
/*
* nodes/{readfuncs.c,read.c}
*/
extern void *stringToNode(char *str);
/*
* nodes/copyfuncs.c
*/
extern void *copyObject(void *obj);
/*
* nodes/equalfuncs.c
*/
extern bool equal(void *a, void *b);
/* ----------------
* I don't know why this is here. Most likely a hack..
* -cim 6/3/90
* ----------------
*/
typedef float Cost;
/*
* CmdType -
* enums for type of operation to aid debugging
*
* ??? could have put this in parsenodes.h but many files not in the
* optimizer also need this...
*/
typedef enum CmdType {
CMD_UNKNOWN,
CMD_SELECT, /* select stmt (formerly retrieve) */
CMD_UPDATE, /* update stmt (formerly replace) */
CMD_INSERT, /* insert stmt (formerly append) */
CMD_DELETE,
CMD_NOTIFY,
CMD_UTILITY /* cmds like create, destroy, copy, vacuum, etc. */
} CmdType;
#endif /* NODES_H */