htup.h File Reference

#include "storage/itemptr.h"

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Data Structures
struct	HeapTupleData

Macros
#define	FIELDNO_HEAPTUPLEDATA_DATA   3
#define	HEAPTUPLESIZE   MAXALIGN(sizeof(HeapTupleData))
#define	HeapTupleIsValid(tuple)   ((tuple) != NULL)

Typedefs
typedef struct HeapTupleHeaderData	HeapTupleHeaderData
typedef HeapTupleHeaderData *	HeapTupleHeader
typedef struct MinimalTupleData	MinimalTupleData
typedef MinimalTupleData *	MinimalTuple
typedef struct HeapTupleData	HeapTupleData
typedef HeapTupleData *	HeapTuple

Functions
CommandId	HeapTupleHeaderGetCmin (const HeapTupleHeaderData *tup)
CommandId	HeapTupleHeaderGetCmax (const HeapTupleHeaderData *tup)
void	HeapTupleHeaderAdjustCmax (const HeapTupleHeaderData *tup, CommandId *cmax, bool *iscombo)
TransactionId	HeapTupleGetUpdateXid (const HeapTupleHeaderData *tup)

Macro Definition Documentation

FIELDNO_HEAPTUPLEDATA_DATA

#define FIELDNO_HEAPTUPLEDATA_DATA   3

Definition at line 67 of file htup.h.

HeapTupleIsValid

#define HeapTupleIsValid

(

tuple

)

((tuple) != NULL)

Definition at line 78 of file htup.h.

HEAPTUPLESIZE

#define HEAPTUPLESIZE   MAXALIGN(sizeof(HeapTupleData))

Definition at line 73 of file htup.h.

Typedef Documentation

HeapTuple

typedef HeapTupleData* HeapTuple

Definition at line 71 of file htup.h.

HeapTupleData

typedef struct HeapTupleData HeapTupleData

HeapTupleHeader

typedef HeapTupleHeaderData* HeapTupleHeader

Definition at line 23 of file htup.h.

HeapTupleHeaderData

typedef struct HeapTupleHeaderData HeapTupleHeaderData

Definition at line 21 of file htup.h.

MinimalTuple

typedef MinimalTupleData* MinimalTuple

Definition at line 27 of file htup.h.

MinimalTupleData

typedef struct MinimalTupleData MinimalTupleData

Definition at line 25 of file htup.h.

Function Documentation

HeapTupleGetUpdateXid()

TransactionId HeapTupleGetUpdateXid ( const HeapTupleHeaderData *  tup )

extern

Definition at line 7668 of file heapam.c.

{
    return MultiXactIdGetUpdateXid(HeapTupleHeaderGetRawXmax(tup),
                                   tup->t_infomask);
}

References fb(), HeapTupleHeaderGetRawXmax(), and MultiXactIdGetUpdateXid().

Referenced by check_tuple_visibility(), heap_update(), HeapTupleHeaderGetUpdateXid(), HeapTupleHeaderIsOnlyLocked(), HeapTupleSatisfiesDirty(), HeapTupleSatisfiesHistoricMVCC(), HeapTupleSatisfiesMVCC(), HeapTupleSatisfiesSelf(), HeapTupleSatisfiesUpdate(), and HeapTupleSatisfiesVacuumHorizon().

HeapTupleHeaderAdjustCmax()

void HeapTupleHeaderAdjustCmax ( const HeapTupleHeaderData *  tup, CommandId *  cmax, bool *  iscombo  )

extern

Definition at line 153 of file combocid.c.

{
    /*
     * If we're marking a tuple deleted that was inserted by (any
     * subtransaction of) our transaction, we need to use a combo command id.
     * Test for HeapTupleHeaderXminCommitted() first, because it's cheaper
     * than a TransactionIdIsCurrentTransactionId call.
     */
    if (!HeapTupleHeaderXminCommitted(tup) &&
        TransactionIdIsCurrentTransactionId(HeapTupleHeaderGetRawXmin(tup)))
    {
        CommandId   cmin = HeapTupleHeaderGetCmin(tup);
 
        *cmax = GetComboCommandId(cmin, *cmax);
        *iscombo = true;
    }
    else
    {
        *iscombo = false;
    }
}

References fb(), GetComboCommandId(), HeapTupleHeaderGetCmin(), HeapTupleHeaderGetRawXmin(), HeapTupleHeaderXminCommitted(), and TransactionIdIsCurrentTransactionId().

Referenced by heap_delete(), and heap_update().

HeapTupleHeaderGetCmax()

CommandId HeapTupleHeaderGetCmax ( const HeapTupleHeaderData *  tup )

extern

Definition at line 118 of file combocid.c.

{
    CommandId   cid = HeapTupleHeaderGetRawCommandId(tup);
 
    Assert(!(tup->t_infomask & HEAP_MOVED));
 
    /*
     * Because GetUpdateXid() performs memory allocations if xmax is a
     * multixact we can't Assert() if we're inside a critical section. This
     * weakens the check, but not using GetCmax() inside one would complicate
     * things too much.
     */
    Assert(CritSectionCount > 0 ||
           TransactionIdIsCurrentTransactionId(HeapTupleHeaderGetUpdateXid(tup)));
 
    if (tup->t_infomask & HEAP_COMBOCID)
        return GetRealCmax(cid);
    else
        return cid;
}

References Assert, CritSectionCount, fb(), GetRealCmax(), HEAP_COMBOCID, HEAP_MOVED, HeapTupleHeaderGetRawCommandId(), HeapTupleHeaderGetUpdateXid(), and TransactionIdIsCurrentTransactionId().

Referenced by heap_delete(), heap_lock_tuple(), heap_update(), HeapTupleSatisfiesMVCC(), HeapTupleSatisfiesUpdate(), and log_heap_new_cid().

HeapTupleHeaderGetCmin()

CommandId HeapTupleHeaderGetCmin ( const HeapTupleHeaderData *  tup )

extern

Definition at line 104 of file combocid.c.

{
    CommandId   cid = HeapTupleHeaderGetRawCommandId(tup);
 
    Assert(!(tup->t_infomask & HEAP_MOVED));
    Assert(TransactionIdIsCurrentTransactionId(HeapTupleHeaderGetXmin(tup)));
 
    if (tup->t_infomask & HEAP_COMBOCID)
        return GetRealCmin(cid);
    else
        return cid;
}

References Assert, fb(), GetRealCmin(), HEAP_COMBOCID, HEAP_MOVED, HeapTupleHeaderGetRawCommandId(), HeapTupleHeaderGetXmin(), and TransactionIdIsCurrentTransactionId().

Referenced by heapam_tuple_lock(), HeapTupleHeaderAdjustCmax(), HeapTupleSatisfiesMVCC(), HeapTupleSatisfiesUpdate(), and log_heap_new_cid().