1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
/*-------------------------------------------------------------------------
*
* executor.h
* support for the POSTGRES executor module
*
*
* Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: executor.h,v 1.58 2001/05/27 20:48:51 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#ifndef EXECUTOR_H
#define EXECUTOR_H
#include "executor/execdesc.h"
/* ----------------
* TupIsNull
*
* This is used mainly to detect when there are no more
* tuples to process.
* ----------------
*/
/* return: true if tuple in slot is NULL, slot is slot to test */
#define TupIsNull(slot) \
((slot) == NULL || (slot)->val == NULL)
/*
* prototypes from functions in execAmi.c
*/
extern void ExecOpenScanR(Oid relOid, int nkeys, ScanKey skeys, bool isindex,
ScanDirection dir, Snapshot snapshot,
Relation *returnRelation, Pointer *returnScanDesc);
extern void ExecCloseR(Plan *node);
extern void ExecReScan(Plan *node, ExprContext *exprCtxt, Plan *parent);
extern HeapScanDesc ExecReScanR(Relation relDesc, HeapScanDesc scanDesc,
ScanDirection direction, int nkeys, ScanKey skeys);
extern void ExecMarkPos(Plan *node);
extern void ExecRestrPos(Plan *node);
/*
* prototypes from functions in execJunk.c
*/
extern JunkFilter *ExecInitJunkFilter(List *targetList, TupleDesc tupType,
TupleTableSlot *slot);
extern void ExecFreeJunkFilter(JunkFilter *junkfilter);
extern bool ExecGetJunkAttribute(JunkFilter *junkfilter, TupleTableSlot *slot,
char *attrName, Datum *value, bool *isNull);
extern HeapTuple ExecRemoveJunk(JunkFilter *junkfilter, TupleTableSlot *slot);
/*
* prototypes from functions in execMain.c
*/
extern TupleDesc ExecutorStart(QueryDesc *queryDesc, EState *estate);
extern TupleTableSlot *ExecutorRun(QueryDesc *queryDesc, EState *estate,
int feature, long count);
extern void ExecutorEnd(QueryDesc *queryDesc, EState *estate);
extern void ExecConstraints(char *caller, ResultRelInfo *resultRelInfo,
TupleTableSlot *slot, EState *estate);
extern TupleTableSlot *EvalPlanQual(EState *estate, Index rti,
ItemPointer tid);
/*
* prototypes from functions in execProcnode.c
*/
extern bool ExecInitNode(Plan *node, EState *estate, Plan *parent);
extern TupleTableSlot *ExecProcNode(Plan *node, Plan *parent);
extern int ExecCountSlotsNode(Plan *node);
extern void ExecEndNode(Plan *node, Plan *parent);
extern TupleDesc ExecGetTupType(Plan *node);
/*
* prototypes from functions in execQual.c
*/
extern Datum ExecEvalParam(Param *expression, ExprContext *econtext,
bool *isNull);
extern Datum GetAttributeByNum(TupleTableSlot *slot, AttrNumber attrno,
bool *isNull);
extern Datum GetAttributeByName(TupleTableSlot *slot, char *attname,
bool *isNull);
extern Datum ExecMakeFunctionResult(FunctionCachePtr fcache,
List *arguments,
ExprContext *econtext,
bool *isNull,
ExprDoneCond *isDone);
extern Datum ExecEvalExpr(Node *expression, ExprContext *econtext,
bool *isNull, ExprDoneCond *isDone);
extern Datum ExecEvalExprSwitchContext(Node *expression, ExprContext *econtext,
bool *isNull, ExprDoneCond *isDone);
extern bool ExecQual(List *qual, ExprContext *econtext, bool resultForNull);
extern int ExecTargetListLength(List *targetlist);
extern int ExecCleanTargetListLength(List *targetlist);
extern TupleTableSlot *ExecProject(ProjectionInfo *projInfo,
ExprDoneCond *isDone);
/*
* prototypes from functions in execScan.c
*/
typedef TupleTableSlot *(*ExecScanAccessMtd) (Scan *node);
extern TupleTableSlot *ExecScan(Scan *node, ExecScanAccessMtd accessMtd);
/*
* prototypes from functions in execTuples.c
*/
extern TupleTable ExecCreateTupleTable(int initialSize);
extern void ExecDropTupleTable(TupleTable table, bool shouldFree);
extern TupleTableSlot *ExecAllocTableSlot(TupleTable table);
extern TupleTableSlot *MakeTupleTableSlot(void);
extern TupleTableSlot *ExecStoreTuple(HeapTuple tuple,
TupleTableSlot *slot,
Buffer buffer,
bool shouldFree);
extern TupleTableSlot *ExecClearTuple(TupleTableSlot *slot);
extern void ExecSetSlotDescriptor(TupleTableSlot *slot,
TupleDesc tupdesc, bool shouldFree);
extern void ExecSetSlotDescriptorIsNew(TupleTableSlot *slot, bool isNew);
extern void ExecInitResultTupleSlot(EState *estate, CommonState *commonstate);
extern void ExecInitScanTupleSlot(EState *estate,
CommonScanState *commonscanstate);
extern TupleTableSlot *ExecInitExtraTupleSlot(EState *estate);
extern TupleTableSlot *ExecInitNullTupleSlot(EState *estate,
TupleDesc tupType);
extern TupleDesc ExecTypeFromTL(List *targetList);
extern void SetChangedParamList(Plan *node, List *newchg);
/*
* prototypes from functions in execUtils.c
*/
extern void ResetTupleCount(void);
extern void ExecAssignExprContext(EState *estate, CommonState *commonstate);
extern void ExecAssignResultType(CommonState *commonstate,
TupleDesc tupDesc, bool shouldFree);
extern void ExecAssignResultTypeFromOuterPlan(Plan *node,
CommonState *commonstate);
extern void ExecAssignResultTypeFromTL(Plan *node, CommonState *commonstate);
extern TupleDesc ExecGetResultType(CommonState *commonstate);
extern void ExecAssignProjectionInfo(Plan *node, CommonState *commonstate);
extern void ExecFreeProjectionInfo(CommonState *commonstate);
extern void ExecFreeExprContext(CommonState *commonstate);
extern TupleDesc ExecGetScanType(CommonScanState *csstate);
extern void ExecAssignScanType(CommonScanState *csstate,
TupleDesc tupDesc, bool shouldFree);
extern void ExecAssignScanTypeFromOuterPlan(Plan *node,
CommonScanState *csstate);
extern Form_pg_attribute ExecGetTypeInfo(Relation relDesc);
extern ExprContext *MakeExprContext(TupleTableSlot *slot,
MemoryContext queryContext);
extern void FreeExprContext(ExprContext *econtext);
#define ResetExprContext(econtext) \
MemoryContextReset((econtext)->ecxt_per_tuple_memory)
extern ExprContext *MakePerTupleExprContext(EState *estate);
/* Get an EState's per-output-tuple exprcontext, making it if first use */
#define GetPerTupleExprContext(estate) \
((estate)->es_per_tuple_exprcontext ? \
(estate)->es_per_tuple_exprcontext : \
MakePerTupleExprContext(estate))
#define GetPerTupleMemoryContext(estate) \
(GetPerTupleExprContext(estate)->ecxt_per_tuple_memory)
/* Reset an EState's per-output-tuple exprcontext, if one's been created */
#define ResetPerTupleExprContext(estate) \
do { \
if ((estate)->es_per_tuple_exprcontext) \
ResetExprContext((estate)->es_per_tuple_exprcontext); \
} while (0)
extern void ExecOpenIndices(ResultRelInfo *resultRelInfo);
extern void ExecCloseIndices(ResultRelInfo *resultRelInfo);
extern void ExecInsertIndexTuples(TupleTableSlot *slot, ItemPointer tupleid,
EState *estate, bool is_update);
#endif /* EXECUTOR_H */
|
