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tuptable.h
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1/*-------------------------------------------------------------------------
2 *
3 * tuptable.h
4 * tuple table support stuff
5 *
6 *
7 * Portions Copyright (c) 1996-2024, PostgreSQL Global Development Group
8 * Portions Copyright (c) 1994, Regents of the University of California
9 *
10 * src/include/executor/tuptable.h
11 *
12 *-------------------------------------------------------------------------
13 */
14#ifndef TUPTABLE_H
15#define TUPTABLE_H
16
17#include "access/htup.h"
18#include "access/htup_details.h"
19#include "access/sysattr.h"
20#include "access/tupdesc.h"
21#include "storage/buf.h"
22
23/*----------
24 * The executor stores tuples in a "tuple table" which is a List of
25 * independent TupleTableSlots.
26 *
27 * There's various different types of tuple table slots, each being able to
28 * store different types of tuples. Additional types of slots can be added
29 * without modifying core code. The type of a slot is determined by the
30 * TupleTableSlotOps* passed to the slot creation routine. The builtin types
31 * of slots are
32 *
33 * 1. physical tuple in a disk buffer page (TTSOpsBufferHeapTuple)
34 * 2. physical tuple constructed in palloc'ed memory (TTSOpsHeapTuple)
35 * 3. "minimal" physical tuple constructed in palloc'ed memory
36 * (TTSOpsMinimalTuple)
37 * 4. "virtual" tuple consisting of Datum/isnull arrays (TTSOpsVirtual)
38 *
39 *
40 * The first two cases are similar in that they both deal with "materialized"
41 * tuples, but resource management is different. For a tuple in a disk page
42 * we need to hold a pin on the buffer until the TupleTableSlot's reference
43 * to the tuple is dropped; while for a palloc'd tuple we usually want the
44 * tuple pfree'd when the TupleTableSlot's reference is dropped.
45 *
46 * A "minimal" tuple is handled similarly to a palloc'd regular tuple.
47 * At present, minimal tuples never are stored in buffers, so there is no
48 * parallel to case 1. Note that a minimal tuple has no "system columns".
49 *
50 * A "virtual" tuple is an optimization used to minimize physical data copying
51 * in a nest of plan nodes. Until materialized pass-by-reference Datums in
52 * the slot point to storage that is not directly associated with the
53 * TupleTableSlot; generally they will point to part of a tuple stored in a
54 * lower plan node's output TupleTableSlot, or to a function result
55 * constructed in a plan node's per-tuple econtext. It is the responsibility
56 * of the generating plan node to be sure these resources are not released for
57 * as long as the virtual tuple needs to be valid or is materialized. Note
58 * also that a virtual tuple does not have any "system columns".
59 *
60 * The Datum/isnull arrays of a TupleTableSlot serve double duty. For virtual
61 * slots they are the authoritative data. For the other builtin slots,
62 * the arrays contain data extracted from the tuple. (In this state, any
63 * pass-by-reference Datums point into the physical tuple.) The extracted
64 * information is built "lazily", ie, only as needed. This serves to avoid
65 * repeated extraction of data from the physical tuple.
66 *
67 * A TupleTableSlot can also be "empty", indicated by flag TTS_FLAG_EMPTY set
68 * in tts_flags, holding no valid data. This is the only valid state for a
69 * freshly-created slot that has not yet had a tuple descriptor assigned to
70 * it. In this state, TTS_FLAG_SHOULDFREE should not be set in tts_flags and
71 * tts_nvalid should be set to zero.
72 *
73 * The tupleDescriptor is simply referenced, not copied, by the TupleTableSlot
74 * code. The caller of ExecSetSlotDescriptor() is responsible for providing
75 * a descriptor that will live as long as the slot does. (Typically, both
76 * slots and descriptors are in per-query memory and are freed by memory
77 * context deallocation at query end; so it's not worth providing any extra
78 * mechanism to do more. However, the slot will increment the tupdesc
79 * reference count if a reference-counted tupdesc is supplied.)
80 *
81 * When TTS_FLAG_SHOULDFREE is set in tts_flags, the physical tuple is "owned"
82 * by the slot and should be freed when the slot's reference to the tuple is
83 * dropped.
84 *
85 * tts_values/tts_isnull are allocated either when the slot is created (when
86 * the descriptor is provided), or when a descriptor is assigned to the slot;
87 * they are of length equal to the descriptor's natts.
88 *
89 * The TTS_FLAG_SLOW flag is saved state for
90 * slot_deform_heap_tuple, and should not be touched by any other code.
91 *----------
92 */
93
94/* true = slot is empty */
95#define TTS_FLAG_EMPTY (1 << 1)
96#define TTS_EMPTY(slot) (((slot)->tts_flags & TTS_FLAG_EMPTY) != 0)
97
98/* should pfree tuple "owned" by the slot? */
99#define TTS_FLAG_SHOULDFREE (1 << 2)
100#define TTS_SHOULDFREE(slot) (((slot)->tts_flags & TTS_FLAG_SHOULDFREE) != 0)
101
102/* saved state for slot_deform_heap_tuple */
103#define TTS_FLAG_SLOW (1 << 3)
104#define TTS_SLOW(slot) (((slot)->tts_flags & TTS_FLAG_SLOW) != 0)
105
106/* fixed tuple descriptor */
107#define TTS_FLAG_FIXED (1 << 4)
108#define TTS_FIXED(slot) (((slot)->tts_flags & TTS_FLAG_FIXED) != 0)
109
110struct TupleTableSlotOps;
112
113/* base tuple table slot type */
114typedef struct TupleTableSlot
115{
117#define FIELDNO_TUPLETABLESLOT_FLAGS 1
118 uint16 tts_flags; /* Boolean states */
119#define FIELDNO_TUPLETABLESLOT_NVALID 2
120 AttrNumber tts_nvalid; /* # of valid values in tts_values */
121 const TupleTableSlotOps *const tts_ops; /* implementation of slot */
122#define FIELDNO_TUPLETABLESLOT_TUPLEDESCRIPTOR 4
123 TupleDesc tts_tupleDescriptor; /* slot's tuple descriptor */
124#define FIELDNO_TUPLETABLESLOT_VALUES 5
125 Datum *tts_values; /* current per-attribute values */
126#define FIELDNO_TUPLETABLESLOT_ISNULL 6
127 bool *tts_isnull; /* current per-attribute isnull flags */
128 MemoryContext tts_mcxt; /* slot itself is in this context */
129 ItemPointerData tts_tid; /* stored tuple's tid */
130 Oid tts_tableOid; /* table oid of tuple */
132
133/* routines for a TupleTableSlot implementation */
135{
136 /* Minimum size of the slot */
138
139 /* Initialization. */
140 void (*init) (TupleTableSlot *slot);
141
142 /* Destruction. */
143 void (*release) (TupleTableSlot *slot);
144
145 /*
146 * Clear the contents of the slot. Only the contents are expected to be
147 * cleared and not the tuple descriptor. Typically an implementation of
148 * this callback should free the memory allocated for the tuple contained
149 * in the slot.
150 */
151 void (*clear) (TupleTableSlot *slot);
152
153 /*
154 * Fill up first natts entries of tts_values and tts_isnull arrays with
155 * values from the tuple contained in the slot. The function may be called
156 * with natts more than the number of attributes available in the tuple,
157 * in which case it should set tts_nvalid to the number of returned
158 * columns.
159 */
160 void (*getsomeattrs) (TupleTableSlot *slot, int natts);
161
162 /*
163 * Returns value of the given system attribute as a datum and sets isnull
164 * to false, if it's not NULL. Throws an error if the slot type does not
165 * support system attributes.
166 */
167 Datum (*getsysattr) (TupleTableSlot *slot, int attnum, bool *isnull);
168
169 /*
170 * Check if the tuple is created by the current transaction. Throws an
171 * error if the slot doesn't contain the storage tuple.
172 */
174
175 /*
176 * Make the contents of the slot solely depend on the slot, and not on
177 * underlying resources (like another memory context, buffers, etc).
178 */
180
181 /*
182 * Copy the contents of the source slot into the destination slot's own
183 * context. Invoked using callback of the destination slot. 'dstslot' and
184 * 'srcslot' can be assumed to have the same number of attributes.
185 */
186 void (*copyslot) (TupleTableSlot *dstslot, TupleTableSlot *srcslot);
187
188 /*
189 * Return a heap tuple "owned" by the slot. It is slot's responsibility to
190 * free the memory consumed by the heap tuple. If the slot can not "own" a
191 * heap tuple, it should not implement this callback and should set it as
192 * NULL.
193 */
195
196 /*
197 * Return a minimal tuple "owned" by the slot. It is slot's responsibility
198 * to free the memory consumed by the minimal tuple. If the slot can not
199 * "own" a minimal tuple, it should not implement this callback and should
200 * set it as NULL.
201 */
203
204 /*
205 * Return a copy of heap tuple representing the contents of the slot. The
206 * copy needs to be palloc'd in the current memory context. The slot
207 * itself is expected to remain unaffected. It is *not* expected to have
208 * meaningful "system columns" in the copy. The copy is not be "owned" by
209 * the slot i.e. the caller has to take responsibility to free memory
210 * consumed by the slot.
211 */
213
214 /*
215 * Return a copy of minimal tuple representing the contents of the slot.
216 * The copy needs to be palloc'd in the current memory context. The slot
217 * itself is expected to remain unaffected. It is *not* expected to have
218 * meaningful "system columns" in the copy. The copy is not be "owned" by
219 * the slot i.e. the caller has to take responsibility to free memory
220 * consumed by the slot.
221 */
223};
224
225/*
226 * Predefined TupleTableSlotOps for various types of TupleTableSlotOps. The
227 * same are used to identify the type of a given slot.
228 */
233
234#define TTS_IS_VIRTUAL(slot) ((slot)->tts_ops == &TTSOpsVirtual)
235#define TTS_IS_HEAPTUPLE(slot) ((slot)->tts_ops == &TTSOpsHeapTuple)
236#define TTS_IS_MINIMALTUPLE(slot) ((slot)->tts_ops == &TTSOpsMinimalTuple)
237#define TTS_IS_BUFFERTUPLE(slot) ((slot)->tts_ops == &TTSOpsBufferHeapTuple)
238
239
240/*
241 * Tuple table slot implementations.
242 */
243
245{
246 pg_node_attr(abstract)
247
248 TupleTableSlot base;
249
250 char *data; /* data for materialized slots */
252
253typedef struct HeapTupleTableSlot
254{
255 pg_node_attr(abstract)
256
257 TupleTableSlot base;
258
259#define FIELDNO_HEAPTUPLETABLESLOT_TUPLE 1
260 HeapTuple tuple; /* physical tuple */
261#define FIELDNO_HEAPTUPLETABLESLOT_OFF 2
262 uint32 off; /* saved state for slot_deform_heap_tuple */
263 HeapTupleData tupdata; /* optional workspace for storing tuple */
265
266/* heap tuple residing in a buffer */
268{
269 pg_node_attr(abstract)
270
272
273 /*
274 * If buffer is not InvalidBuffer, then the slot is holding a pin on the
275 * indicated buffer page; drop the pin when we release the slot's
276 * reference to that buffer. (TTS_FLAG_SHOULDFREE should not be set in
277 * such a case, since presumably base.tuple is pointing into the buffer.)
278 */
279 Buffer buffer; /* tuple's buffer, or InvalidBuffer */
281
283{
284 pg_node_attr(abstract)
285
286 TupleTableSlot base;
287
288 /*
289 * In a minimal slot tuple points at minhdr and the fields of that struct
290 * are set correctly for access to the minimal tuple; in particular,
291 * minhdr.t_data points MINIMAL_TUPLE_OFFSET bytes before mintuple. This
292 * allows column extraction to treat the case identically to regular
293 * physical tuples.
294 */
295#define FIELDNO_MINIMALTUPLETABLESLOT_TUPLE 1
296 HeapTuple tuple; /* tuple wrapper */
297 MinimalTuple mintuple; /* minimal tuple, or NULL if none */
298 HeapTupleData minhdr; /* workspace for minimal-tuple-only case */
299#define FIELDNO_MINIMALTUPLETABLESLOT_OFF 4
300 uint32 off; /* saved state for slot_deform_heap_tuple */
302
303/*
304 * TupIsNull -- is a TupleTableSlot empty?
305 */
306#define TupIsNull(slot) \
307 ((slot) == NULL || TTS_EMPTY(slot))
308
309/* in executor/execTuples.c */
311 const TupleTableSlotOps *tts_ops);
312extern TupleTableSlot *ExecAllocTableSlot(List **tupleTable, TupleDesc desc,
313 const TupleTableSlotOps *tts_ops);
314extern void ExecResetTupleTable(List *tupleTable, bool shouldFree);
316 const TupleTableSlotOps *tts_ops);
318extern void ExecSetSlotDescriptor(TupleTableSlot *slot, TupleDesc tupdesc);
320 TupleTableSlot *slot,
321 bool shouldFree);
322extern void ExecForceStoreHeapTuple(HeapTuple tuple,
323 TupleTableSlot *slot,
324 bool shouldFree);
326 TupleTableSlot *slot,
327 Buffer buffer);
329 TupleTableSlot *slot,
330 Buffer buffer);
332 TupleTableSlot *slot,
333 bool shouldFree);
335 bool shouldFree);
339extern HeapTuple ExecFetchSlotHeapTuple(TupleTableSlot *slot, bool materialize, bool *shouldFree);
341 bool *shouldFree);
343extern void slot_getmissingattrs(TupleTableSlot *slot, int startAttNum,
344 int lastAttNum);
345extern void slot_getsomeattrs_int(TupleTableSlot *slot, int attnum);
346
347
348#ifndef FRONTEND
349
350/*
351 * This function forces the entries of the slot's Datum/isnull arrays to be
352 * valid at least up through the attnum'th entry.
353 */
354static inline void
356{
357 if (slot->tts_nvalid < attnum)
359}
360
361/*
362 * slot_getallattrs
363 * This function forces all the entries of the slot's Datum/isnull
364 * arrays to be valid. The caller may then extract data directly
365 * from those arrays instead of using slot_getattr.
366 */
367static inline void
369{
371}
372
373
374/*
375 * slot_attisnull
376 *
377 * Detect whether an attribute of the slot is null, without actually fetching
378 * it.
379 */
380static inline bool
382{
383 Assert(attnum > 0);
384
385 if (attnum > slot->tts_nvalid)
387
388 return slot->tts_isnull[attnum - 1];
389}
390
391/*
392 * slot_getattr - fetch one attribute of the slot's contents.
393 */
394static inline Datum
396 bool *isnull)
397{
398 Assert(attnum > 0);
399
400 if (attnum > slot->tts_nvalid)
402
403 *isnull = slot->tts_isnull[attnum - 1];
404
405 return slot->tts_values[attnum - 1];
406}
407
408/*
409 * slot_getsysattr - fetch a system attribute of the slot's current tuple.
410 *
411 * If the slot type does not contain system attributes, this will throw an
412 * error. Hence before calling this function, callers should make sure that
413 * the slot type is the one that supports system attributes.
414 */
415static inline Datum
416slot_getsysattr(TupleTableSlot *slot, int attnum, bool *isnull)
417{
418 Assert(attnum < 0); /* caller error */
419
421 {
422 *isnull = false;
423 return ObjectIdGetDatum(slot->tts_tableOid);
424 }
426 {
427 *isnull = false;
428 return PointerGetDatum(&slot->tts_tid);
429 }
430
431 /* Fetch the system attribute from the underlying tuple. */
432 return slot->tts_ops->getsysattr(slot, attnum, isnull);
433}
434
435/*
436 * slot_is_current_xact_tuple - check if the slot's current tuple is created
437 * by the current transaction.
438 *
439 * If the slot does not contain a storage tuple, this will throw an error.
440 * Hence before calling this function, callers should make sure that the
441 * slot type supports storage tuples and that there is currently one inside
442 * the slot.
443 */
444static inline bool
446{
447 return slot->tts_ops->is_current_xact_tuple(slot);
448}
449
450/*
451 * ExecClearTuple - clear the slot's contents
452 */
453static inline TupleTableSlot *
455{
456 slot->tts_ops->clear(slot);
457
458 return slot;
459}
460
461/* ExecMaterializeSlot - force a slot into the "materialized" state.
462 *
463 * This causes the slot's tuple to be a local copy not dependent on any
464 * external storage (i.e. pointing into a Buffer, or having allocations in
465 * another memory context).
466 *
467 * A typical use for this operation is to prepare a computed tuple for being
468 * stored on disk. The original data may or may not be virtual, but in any
469 * case we need a private copy for heap_insert to scribble on.
470 */
471static inline void
473{
474 slot->tts_ops->materialize(slot);
475}
476
477/*
478 * ExecCopySlotHeapTuple - return HeapTuple allocated in caller's context
479 */
480static inline HeapTuple
482{
483 Assert(!TTS_EMPTY(slot));
484
485 return slot->tts_ops->copy_heap_tuple(slot);
486}
487
488/*
489 * ExecCopySlotMinimalTuple - return MinimalTuple allocated in caller's context
490 */
491static inline MinimalTuple
493{
494 return slot->tts_ops->copy_minimal_tuple(slot);
495}
496
497/*
498 * ExecCopySlot - copy one slot's contents into another.
499 *
500 * If a source's system attributes are supposed to be accessed in the target
501 * slot, the target slot and source slot types need to match.
502 *
503 * Currently, 'dstslot' and 'srcslot' must have the same number of attributes.
504 * Future work could see this relaxed to allow the source to contain
505 * additional attributes and have the code here only copy over the leading
506 * attributes.
507 */
508static inline TupleTableSlot *
510{
511 Assert(!TTS_EMPTY(srcslot));
512 Assert(srcslot != dstslot);
513 Assert(dstslot->tts_tupleDescriptor->natts ==
514 srcslot->tts_tupleDescriptor->natts);
515
516 dstslot->tts_ops->copyslot(dstslot, srcslot);
517
518 return dstslot;
519}
520
521#endif /* FRONTEND */
522
523#endif /* TUPTABLE_H */
int16 AttrNumber
Definition: attnum.h:21
int Buffer
Definition: buf.h:23
#define PGDLLIMPORT
Definition: c.h:1274
#define Assert(condition)
Definition: c.h:812
uint16_t uint16
Definition: c.h:484
uint32_t uint32
Definition: c.h:485
HeapTupleData * HeapTuple
Definition: htup.h:71
MinimalTupleData * MinimalTuple
Definition: htup.h:27
NodeTag
Definition: nodes.h:27
int16 attnum
Definition: pg_attribute.h:74
const void * data
static Datum PointerGetDatum(const void *X)
Definition: postgres.h:322
uintptr_t Datum
Definition: postgres.h:64
static Datum ObjectIdGetDatum(Oid X)
Definition: postgres.h:252
unsigned int Oid
Definition: postgres_ext.h:31
pg_node_attr(abstract) HeapTupleTableSlot base
pg_node_attr(abstract) TupleTableSlot base
HeapTupleData tupdata
Definition: tuptable.h:263
HeapTuple tuple
Definition: tuptable.h:260
Definition: pg_list.h:54
HeapTupleData minhdr
Definition: tuptable.h:298
pg_node_attr(abstract) TupleTableSlot base
MinimalTuple mintuple
Definition: tuptable.h:297
Datum(* getsysattr)(TupleTableSlot *slot, int attnum, bool *isnull)
Definition: tuptable.h:167
size_t base_slot_size
Definition: tuptable.h:137
bool(* is_current_xact_tuple)(TupleTableSlot *slot)
Definition: tuptable.h:173
HeapTuple(* get_heap_tuple)(TupleTableSlot *slot)
Definition: tuptable.h:194
void(* init)(TupleTableSlot *slot)
Definition: tuptable.h:140
void(* copyslot)(TupleTableSlot *dstslot, TupleTableSlot *srcslot)
Definition: tuptable.h:186
MinimalTuple(* copy_minimal_tuple)(TupleTableSlot *slot)
Definition: tuptable.h:222
void(* getsomeattrs)(TupleTableSlot *slot, int natts)
Definition: tuptable.h:160
HeapTuple(* copy_heap_tuple)(TupleTableSlot *slot)
Definition: tuptable.h:212
MinimalTuple(* get_minimal_tuple)(TupleTableSlot *slot)
Definition: tuptable.h:202
void(* clear)(TupleTableSlot *slot)
Definition: tuptable.h:151
void(* materialize)(TupleTableSlot *slot)
Definition: tuptable.h:179
void(* release)(TupleTableSlot *slot)
Definition: tuptable.h:143
Oid tts_tableOid
Definition: tuptable.h:130
TupleDesc tts_tupleDescriptor
Definition: tuptable.h:123
const TupleTableSlotOps *const tts_ops
Definition: tuptable.h:121
NodeTag type
Definition: tuptable.h:116
MemoryContext tts_mcxt
Definition: tuptable.h:128
AttrNumber tts_nvalid
Definition: tuptable.h:120
bool * tts_isnull
Definition: tuptable.h:127
ItemPointerData tts_tid
Definition: tuptable.h:129
Datum * tts_values
Definition: tuptable.h:125
uint16 tts_flags
Definition: tuptable.h:118
pg_node_attr(abstract) TupleTableSlot base
#define TableOidAttributeNumber
Definition: sysattr.h:26
#define SelfItemPointerAttributeNumber
Definition: sysattr.h:21
PGDLLIMPORT const TupleTableSlotOps TTSOpsMinimalTuple
Definition: execTuples.c:86
void ExecResetTupleTable(List *tupleTable, bool shouldFree)
Definition: execTuples.c:1378
struct TupleTableSlot TupleTableSlot
TupleTableSlot * ExecStorePinnedBufferHeapTuple(HeapTuple tuple, TupleTableSlot *slot, Buffer buffer)
Definition: execTuples.c:1605
TupleTableSlot * MakeSingleTupleTableSlot(TupleDesc tupdesc, const TupleTableSlotOps *tts_ops)
Definition: execTuples.c:1425
static MinimalTuple ExecCopySlotMinimalTuple(TupleTableSlot *slot)
Definition: tuptable.h:492
void ExecDropSingleTupleTableSlot(TupleTableSlot *slot)
Definition: execTuples.c:1441
#define TTS_EMPTY(slot)
Definition: tuptable.h:96
static void slot_getsomeattrs(TupleTableSlot *slot, int attnum)
Definition: tuptable.h:355
TupleTableSlot * ExecStoreVirtualTuple(TupleTableSlot *slot)
Definition: execTuples.c:1739
struct MinimalTupleTableSlot MinimalTupleTableSlot
TupleTableSlot * ExecAllocTableSlot(List **tupleTable, TupleDesc desc, const TupleTableSlotOps *tts_ops)
Definition: execTuples.c:1358
void ExecForceStoreMinimalTuple(MinimalTuple mtup, TupleTableSlot *slot, bool shouldFree)
Definition: execTuples.c:1699
static HeapTuple ExecCopySlotHeapTuple(TupleTableSlot *slot)
Definition: tuptable.h:481
MinimalTuple ExecFetchSlotMinimalTuple(TupleTableSlot *slot, bool *shouldFree)
Definition: execTuples.c:1879
static Datum slot_getsysattr(TupleTableSlot *slot, int attnum, bool *isnull)
Definition: tuptable.h:416
TupleTableSlot * ExecStoreMinimalTuple(MinimalTuple mtup, TupleTableSlot *slot, bool shouldFree)
Definition: execTuples.c:1633
PGDLLIMPORT const TupleTableSlotOps TTSOpsVirtual
Definition: execTuples.c:84
HeapTuple ExecFetchSlotHeapTuple(TupleTableSlot *slot, bool materialize, bool *shouldFree)
Definition: execTuples.c:1831
void slot_getmissingattrs(TupleTableSlot *slot, int startAttNum, int lastAttNum)
Definition: execTuples.c:2055
static Datum slot_getattr(TupleTableSlot *slot, int attnum, bool *isnull)
Definition: tuptable.h:395
TupleTableSlot * ExecStoreBufferHeapTuple(HeapTuple tuple, TupleTableSlot *slot, Buffer buffer)
Definition: execTuples.c:1579
static bool slot_is_current_xact_tuple(TupleTableSlot *slot)
Definition: tuptable.h:445
void ExecStoreHeapTupleDatum(Datum data, TupleTableSlot *slot)
Definition: execTuples.c:1793
void ExecSetSlotDescriptor(TupleTableSlot *slot, TupleDesc tupdesc)
Definition: execTuples.c:1476
static TupleTableSlot * ExecClearTuple(TupleTableSlot *slot)
Definition: tuptable.h:454
PGDLLIMPORT const TupleTableSlotOps TTSOpsHeapTuple
Definition: execTuples.c:85
Datum ExecFetchSlotHeapTupleDatum(TupleTableSlot *slot)
Definition: execTuples.c:1910
static void slot_getallattrs(TupleTableSlot *slot)
Definition: tuptable.h:368
void slot_getsomeattrs_int(TupleTableSlot *slot, int attnum)
Definition: execTuples.c:2089
struct HeapTupleTableSlot HeapTupleTableSlot
static TupleTableSlot * ExecCopySlot(TupleTableSlot *dstslot, TupleTableSlot *srcslot)
Definition: tuptable.h:509
struct BufferHeapTupleTableSlot BufferHeapTupleTableSlot
PGDLLIMPORT const TupleTableSlotOps TTSOpsBufferHeapTuple
Definition: execTuples.c:87
static void ExecMaterializeSlot(TupleTableSlot *slot)
Definition: tuptable.h:472
TupleTableSlot * ExecStoreAllNullTuple(TupleTableSlot *slot)
Definition: execTuples.c:1763
TupleTableSlot * MakeTupleTableSlot(TupleDesc tupleDesc, const TupleTableSlotOps *tts_ops)
Definition: execTuples.c:1299
TupleTableSlot * ExecStoreHeapTuple(HeapTuple tuple, TupleTableSlot *slot, bool shouldFree)
Definition: execTuples.c:1539
static bool slot_attisnull(TupleTableSlot *slot, int attnum)
Definition: tuptable.h:381
struct VirtualTupleTableSlot VirtualTupleTableSlot
void ExecForceStoreHeapTuple(HeapTuple tuple, TupleTableSlot *slot, bool shouldFree)
Definition: execTuples.c:1656