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Diffstat (limited to 'src/include/nodes/nodes.h')
| -rw-r--r-- | src/include/nodes/nodes.h | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/src/include/nodes/nodes.h b/src/include/nodes/nodes.h new file mode 100644 index 00000000000..d22b2ee0c95 --- /dev/null +++ b/src/include/nodes/nodes.h @@ -0,0 +1,299 @@ +/*------------------------------------------------------------------------- + * + * nodes.h-- + * Definitions for tagged nodes. + * + * + * Copyright (c) 1994, Regents of the University of California + * + * $Id: nodes.h,v 1.1 1996/08/28 01:57:37 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 */ |