PostgreSQL Source Code  git master
hio.h File Reference
#include "access/htup.h"
#include "storage/buf.h"
#include "utils/relcache.h"
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Data Structures

struct  BulkInsertStateData
 

Typedefs

typedef struct BulkInsertStateData BulkInsertStateData
 

Functions

void RelationPutHeapTuple (Relation relation, Buffer buffer, HeapTuple tuple, bool token)
 
Buffer RelationGetBufferForTuple (Relation relation, Size len, Buffer otherBuffer, int options, BulkInsertStateData *bistate, Buffer *vmbuffer, Buffer *vmbuffer_other, int num_pages)
 

Typedef Documentation

◆ BulkInsertStateData

Function Documentation

◆ RelationGetBufferForTuple()

Buffer RelationGetBufferForTuple ( Relation  relation,
Size  len,
Buffer  otherBuffer,
int  options,
BulkInsertStateData bistate,
Buffer vmbuffer,
Buffer vmbuffer_other,
int  num_pages 
)

◆ RelationPutHeapTuple()

void RelationPutHeapTuple ( Relation  relation,
Buffer  buffer,
HeapTuple  tuple,
bool  token 
)

Definition at line 35 of file hio.c.

39 {
40  Page pageHeader;
41  OffsetNumber offnum;
42 
43  /*
44  * A tuple that's being inserted speculatively should already have its
45  * token set.
46  */
48 
49  /*
50  * Do not allow tuples with invalid combinations of hint bits to be placed
51  * on a page. This combination is detected as corruption by the
52  * contrib/amcheck logic, so if you disable this assertion, make
53  * corresponding changes there.
54  */
56  (tuple->t_data->t_infomask & HEAP_XMAX_IS_MULTI)));
57 
58  /* Add the tuple to the page */
59  pageHeader = BufferGetPage(buffer);
60 
61  offnum = PageAddItem(pageHeader, (Item) tuple->t_data,
62  tuple->t_len, InvalidOffsetNumber, false, true);
63 
64  if (offnum == InvalidOffsetNumber)
65  elog(PANIC, "failed to add tuple to page");
66 
67  /* Update tuple->t_self to the actual position where it was stored */
68  ItemPointerSet(&(tuple->t_self), BufferGetBlockNumber(buffer), offnum);
69 
70  /*
71  * Insert the correct position into CTID of the stored tuple, too (unless
72  * this is a speculative insertion, in which case the token is held in
73  * CTID field instead)
74  */
75  if (!token)
76  {
77  ItemId itemId = PageGetItemId(pageHeader, offnum);
78  HeapTupleHeader item = (HeapTupleHeader) PageGetItem(pageHeader, itemId);
79 
80  item->t_ctid = tuple->t_self;
81  }
82 }
BlockNumber BufferGetBlockNumber(Buffer buffer)
Definition: bufmgr.c:3713
static Page BufferGetPage(Buffer buffer)
Definition: bufmgr.h:404
Pointer Page
Definition: bufpage.h:78
static Item PageGetItem(Page page, ItemId itemId)
Definition: bufpage.h:351
static ItemId PageGetItemId(Page page, OffsetNumber offsetNumber)
Definition: bufpage.h:240
#define PageAddItem(page, item, size, offsetNumber, overwrite, is_heap)
Definition: bufpage.h:468
#define Assert(condition)
Definition: c.h:858
#define PANIC
Definition: elog.h:42
#define elog(elevel,...)
Definition: elog.h:224
HeapTupleHeaderData * HeapTupleHeader
Definition: htup.h:23
#define HEAP_XMAX_IS_MULTI
Definition: htup_details.h:209
#define HEAP_XMAX_COMMITTED
Definition: htup_details.h:207
#define HeapTupleHeaderIsSpeculative(tup)
Definition: htup_details.h:428
#define token
Definition: indent_globs.h:126
Pointer Item
Definition: item.h:17
static void ItemPointerSet(ItemPointerData *pointer, BlockNumber blockNumber, OffsetNumber offNum)
Definition: itemptr.h:135
#define InvalidOffsetNumber
Definition: off.h:26
uint16 OffsetNumber
Definition: off.h:24
ItemPointerData t_self
Definition: htup.h:65
uint32 t_len
Definition: htup.h:64
HeapTupleHeader t_data
Definition: htup.h:68
ItemPointerData t_ctid
Definition: htup_details.h:161

References Assert, BufferGetBlockNumber(), BufferGetPage(), elog, HEAP_XMAX_COMMITTED, HEAP_XMAX_IS_MULTI, HeapTupleHeaderIsSpeculative, InvalidOffsetNumber, ItemPointerSet(), PageAddItem, PageGetItem(), PageGetItemId(), PANIC, HeapTupleHeaderData::t_ctid, HeapTupleData::t_data, HeapTupleHeaderData::t_infomask, HeapTupleData::t_len, HeapTupleData::t_self, and token.

Referenced by heap_insert(), heap_multi_insert(), and heap_update().