#include "access/transam.h"
#include "access/xlogreader.h"
#include "datatype/timestamp.h"
#include "lib/stringinfo.h"
#include "nodes/pg_list.h"
#include "storage/relfilelocator.h"
#include "storage/sinval.h"

Include dependency graph for xact.h:

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Data Structures
struct	SavedTransactionCharacteristics

struct	xl_xact_assignment

struct	xl_xact_xinfo

struct	xl_xact_dbinfo

struct	xl_xact_subxacts

struct	xl_xact_relfilelocators

struct	xl_xact_stats_item

struct	xl_xact_stats_items

struct	xl_xact_invals

struct	xl_xact_twophase

struct	xl_xact_origin

struct	xl_xact_commit

struct	xl_xact_abort

struct	xl_xact_prepare

struct	xl_xact_parsed_commit

struct	xl_xact_parsed_abort

Macros
#define	GIDSIZE 200

#define	XACT_READ_UNCOMMITTED 0

#define	XACT_READ_COMMITTED 1

#define	XACT_REPEATABLE_READ 2

#define	XACT_SERIALIZABLE 3

#define	IsolationUsesXactSnapshot() (XactIsoLevel >= XACT_REPEATABLE_READ)

#define	IsolationIsSerializable() (XactIsoLevel == XACT_SERIALIZABLE)

#define	SYNCHRONOUS_COMMIT_ON SYNCHRONOUS_COMMIT_REMOTE_FLUSH

#define	XACT_FLAGS_ACCESSEDTEMPNAMESPACE (1U << 0)

#define	XACT_FLAGS_ACQUIREDACCESSEXCLUSIVELOCK (1U << 1)

#define	XACT_FLAGS_NEEDIMMEDIATECOMMIT (1U << 2)

#define	XACT_FLAGS_PIPELINING (1U << 3)

#define	XLOG_XACT_COMMIT 0x00

#define	XLOG_XACT_PREPARE 0x10

#define	XLOG_XACT_ABORT 0x20

#define	XLOG_XACT_COMMIT_PREPARED 0x30

#define	XLOG_XACT_ABORT_PREPARED 0x40

#define	XLOG_XACT_ASSIGNMENT 0x50

#define	XLOG_XACT_INVALIDATIONS 0x60

#define	XLOG_XACT_OPMASK 0x70

#define	XLOG_XACT_HAS_INFO 0x80

#define	XACT_XINFO_HAS_DBINFO (1U << 0)

#define	XACT_XINFO_HAS_SUBXACTS (1U << 1)

#define	XACT_XINFO_HAS_RELFILELOCATORS (1U << 2)

#define	XACT_XINFO_HAS_INVALS (1U << 3)

#define	XACT_XINFO_HAS_TWOPHASE (1U << 4)

#define	XACT_XINFO_HAS_ORIGIN (1U << 5)

#define	XACT_XINFO_HAS_AE_LOCKS (1U << 6)

#define	XACT_XINFO_HAS_GID (1U << 7)

#define	XACT_XINFO_HAS_DROPPED_STATS (1U << 8)

#define	XACT_COMPLETION_APPLY_FEEDBACK (1U << 29)

#define	XACT_COMPLETION_UPDATE_RELCACHE_FILE (1U << 30)

#define	XACT_COMPLETION_FORCE_SYNC_COMMIT (1U << 31)

#define	XactCompletionApplyFeedback(xinfo) ((xinfo & XACT_COMPLETION_APPLY_FEEDBACK) != 0)

#define	XactCompletionRelcacheInitFileInval(xinfo) ((xinfo & XACT_COMPLETION_UPDATE_RELCACHE_FILE) != 0)

#define	XactCompletionForceSyncCommit(xinfo) ((xinfo & XACT_COMPLETION_FORCE_SYNC_COMMIT) != 0)

#define	MinSizeOfXactAssignment offsetof(xl_xact_assignment, xsub)

#define	MinSizeOfXactSubxacts offsetof(xl_xact_subxacts, subxacts)

#define	MinSizeOfXactRelfileLocators offsetof(xl_xact_relfilelocators, xlocators)

#define	MinSizeOfXactStatsItems offsetof(xl_xact_stats_items, items)

#define	MinSizeOfXactInvals offsetof(xl_xact_invals, msgs)

#define	MinSizeOfXactCommit (offsetof(xl_xact_commit, xact_time) + sizeof(TimestampTz))

#define	MinSizeOfXactAbort sizeof(xl_xact_abort)

Typedefs
typedef void(*	XactCallback) (XactEvent event, void *arg)

typedef void(*	SubXactCallback) (SubXactEvent event, SubTransactionId mySubid, SubTransactionId parentSubid, void *arg)

typedef struct SavedTransactionCharacteristics	SavedTransactionCharacteristics

typedef struct xl_xact_assignment	xl_xact_assignment

typedef struct xl_xact_xinfo	xl_xact_xinfo

typedef struct xl_xact_dbinfo	xl_xact_dbinfo

typedef struct xl_xact_subxacts	xl_xact_subxacts

typedef struct xl_xact_relfilelocators	xl_xact_relfilelocators

typedef struct xl_xact_stats_item	xl_xact_stats_item

typedef struct xl_xact_stats_items	xl_xact_stats_items

typedef struct xl_xact_invals	xl_xact_invals

typedef struct xl_xact_twophase	xl_xact_twophase

typedef struct xl_xact_origin	xl_xact_origin

typedef struct xl_xact_commit	xl_xact_commit

typedef struct xl_xact_abort	xl_xact_abort

typedef struct xl_xact_prepare	xl_xact_prepare

typedef struct xl_xact_parsed_commit	xl_xact_parsed_commit

typedef xl_xact_parsed_commit	xl_xact_parsed_prepare

typedef struct xl_xact_parsed_abort	xl_xact_parsed_abort

Functions
bool	IsTransactionState (void)

bool	IsAbortedTransactionBlockState (void)

TransactionId	GetTopTransactionId (void)

TransactionId	GetTopTransactionIdIfAny (void)

TransactionId	GetCurrentTransactionId (void)

TransactionId	GetCurrentTransactionIdIfAny (void)

TransactionId	GetStableLatestTransactionId (void)

SubTransactionId	GetCurrentSubTransactionId (void)

FullTransactionId	GetTopFullTransactionId (void)

FullTransactionId	GetTopFullTransactionIdIfAny (void)

FullTransactionId	GetCurrentFullTransactionId (void)

FullTransactionId	GetCurrentFullTransactionIdIfAny (void)

void	MarkCurrentTransactionIdLoggedIfAny (void)

bool	SubTransactionIsActive (SubTransactionId subxid)

CommandId	GetCurrentCommandId (bool used)

void	SetParallelStartTimestamps (TimestampTz xact_ts, TimestampTz stmt_ts)

TimestampTz	GetCurrentTransactionStartTimestamp (void)

TimestampTz	GetCurrentStatementStartTimestamp (void)

TimestampTz	GetCurrentTransactionStopTimestamp (void)

void	SetCurrentStatementStartTimestamp (void)

int	GetCurrentTransactionNestLevel (void)

bool	TransactionIdIsCurrentTransactionId (TransactionId xid)

void	CommandCounterIncrement (void)

void	ForceSyncCommit (void)

void	StartTransactionCommand (void)

void	SaveTransactionCharacteristics (SavedTransactionCharacteristics *s)

void	RestoreTransactionCharacteristics (const SavedTransactionCharacteristics *s)

void	CommitTransactionCommand (void)

void	AbortCurrentTransaction (void)

void	BeginTransactionBlock (void)

bool	EndTransactionBlock (bool chain)

bool	PrepareTransactionBlock (const char *gid)

void	UserAbortTransactionBlock (bool chain)

void	BeginImplicitTransactionBlock (void)

void	EndImplicitTransactionBlock (void)

void	ReleaseSavepoint (const char *name)

void	DefineSavepoint (const char *name)

void	RollbackToSavepoint (const char *name)

void	BeginInternalSubTransaction (const char *name)

void	ReleaseCurrentSubTransaction (void)

void	RollbackAndReleaseCurrentSubTransaction (void)

bool	IsSubTransaction (void)

Size	EstimateTransactionStateSpace (void)

void	SerializeTransactionState (Size maxsize, char *start_address)

void	StartParallelWorkerTransaction (char *tstatespace)

void	EndParallelWorkerTransaction (void)

bool	IsTransactionBlock (void)

bool	IsTransactionOrTransactionBlock (void)

char	TransactionBlockStatusCode (void)

void	AbortOutOfAnyTransaction (void)

void	PreventInTransactionBlock (bool isTopLevel, const char *stmtType)

void	RequireTransactionBlock (bool isTopLevel, const char *stmtType)

void	WarnNoTransactionBlock (bool isTopLevel, const char *stmtType)

bool	IsInTransactionBlock (bool isTopLevel)

void	RegisterXactCallback (XactCallback callback, void *arg)

void	UnregisterXactCallback (XactCallback callback, void *arg)

void	RegisterSubXactCallback (SubXactCallback callback, void *arg)

void	UnregisterSubXactCallback (SubXactCallback callback, void *arg)

bool	IsSubxactTopXidLogPending (void)

void	MarkSubxactTopXidLogged (void)

int	xactGetCommittedChildren (TransactionId **ptr)

XLogRecPtr	XactLogCommitRecord (TimestampTz commit_time, int nsubxacts, TransactionId subxacts, int nrels, RelFileLocator rels, int ndroppedstats, xl_xact_stats_item droppedstats, int nmsgs, SharedInvalidationMessage msgs, bool relcacheInval, int xactflags, TransactionId twophase_xid, const char *twophase_gid)

XLogRecPtr	XactLogAbortRecord (TimestampTz abort_time, int nsubxacts, TransactionId subxacts, int nrels, RelFileLocator rels, int ndroppedstats, xl_xact_stats_item droppedstats, int xactflags, TransactionId twophase_xid, const char twophase_gid)

void	xact_redo (XLogReaderState *record)

void	xact_desc (StringInfo buf, XLogReaderState *record)

const char *	xact_identify (uint8 info)

void	ParseCommitRecord (uint8 info, xl_xact_commit xlrec, xl_xact_parsed_commit parsed)

void	ParseAbortRecord (uint8 info, xl_xact_abort xlrec, xl_xact_parsed_abort parsed)

void	ParsePrepareRecord (uint8 info, xl_xact_prepare xlrec, xl_xact_parsed_prepare parsed)

void	EnterParallelMode (void)

void	ExitParallelMode (void)

bool	IsInParallelMode (void)

Variables
PGDLLIMPORT int	DefaultXactIsoLevel

PGDLLIMPORT int	XactIsoLevel

PGDLLIMPORT bool	DefaultXactReadOnly

PGDLLIMPORT bool	XactReadOnly

PGDLLIMPORT bool	xact_is_sampled

PGDLLIMPORT bool	DefaultXactDeferrable

PGDLLIMPORT bool	XactDeferrable

PGDLLIMPORT int	synchronous_commit

PGDLLIMPORT TransactionId	CheckXidAlive

PGDLLIMPORT bool	bsysscan

PGDLLIMPORT int	MyXactFlags

Macro Definition Documentation

◆ GIDSIZE

#define GIDSIZE 200

Definition at line 31 of file xact.h.

◆ IsolationIsSerializable

#define IsolationIsSerializable ( ) (XactIsoLevel == XACT_SERIALIZABLE)

Definition at line 52 of file xact.h.

◆ IsolationUsesXactSnapshot

#define IsolationUsesXactSnapshot ( ) (XactIsoLevel >= XACT_REPEATABLE_READ)

Definition at line 51 of file xact.h.

◆ MinSizeOfXactAbort

#define MinSizeOfXactAbort sizeof(xl_xact_abort)

Definition at line 350 of file xact.h.

◆ MinSizeOfXactAssignment

#define MinSizeOfXactAssignment offsetof(xl_xact_assignment, xsub)

Definition at line 225 of file xact.h.

◆ MinSizeOfXactCommit

#define MinSizeOfXactCommit (offsetof(xl_xact_commit, xact_time) + sizeof(TimestampTz))

Definition at line 334 of file xact.h.

◆ MinSizeOfXactInvals

#define MinSizeOfXactInvals offsetof(xl_xact_invals, msgs)

Definition at line 307 of file xact.h.

◆ MinSizeOfXactRelfileLocators

#define MinSizeOfXactRelfileLocators offsetof(xl_xact_relfilelocators, xlocators)

Definition at line 273 of file xact.h.

◆ MinSizeOfXactStatsItems

#define MinSizeOfXactStatsItems offsetof(xl_xact_stats_items, items)

Definition at line 300 of file xact.h.

◆ MinSizeOfXactSubxacts

#define MinSizeOfXactSubxacts offsetof(xl_xact_subxacts, subxacts)

Definition at line 266 of file xact.h.

◆ SYNCHRONOUS_COMMIT_ON

#define SYNCHRONOUS_COMMIT_ON SYNCHRONOUS_COMMIT_REMOTE_FLUSH

Definition at line 80 of file xact.h.

◆ XACT_COMPLETION_APPLY_FEEDBACK

#define XACT_COMPLETION_APPLY_FEEDBACK (1U << 29)

Definition at line 206 of file xact.h.

◆ XACT_COMPLETION_FORCE_SYNC_COMMIT

#define XACT_COMPLETION_FORCE_SYNC_COMMIT (1U << 31)

Definition at line 208 of file xact.h.

◆ XACT_COMPLETION_UPDATE_RELCACHE_FILE

#define XACT_COMPLETION_UPDATE_RELCACHE_FILE (1U << 30)

Definition at line 207 of file xact.h.

◆ XACT_FLAGS_ACCESSEDTEMPNAMESPACE

#define XACT_FLAGS_ACCESSEDTEMPNAMESPACE (1U << 0)

Definition at line 102 of file xact.h.

◆ XACT_FLAGS_ACQUIREDACCESSEXCLUSIVELOCK

#define XACT_FLAGS_ACQUIREDACCESSEXCLUSIVELOCK (1U << 1)

Definition at line 108 of file xact.h.

◆ XACT_FLAGS_NEEDIMMEDIATECOMMIT

#define XACT_FLAGS_NEEDIMMEDIATECOMMIT (1U << 2)

Definition at line 114 of file xact.h.

◆ XACT_FLAGS_PIPELINING

#define XACT_FLAGS_PIPELINING (1U << 3)

Definition at line 121 of file xact.h.

◆ XACT_READ_COMMITTED

#define XACT_READ_COMMITTED 1

Definition at line 37 of file xact.h.

◆ XACT_READ_UNCOMMITTED

#define XACT_READ_UNCOMMITTED 0

Definition at line 36 of file xact.h.

◆ XACT_REPEATABLE_READ

#define XACT_REPEATABLE_READ 2

Definition at line 38 of file xact.h.

◆ XACT_SERIALIZABLE

#define XACT_SERIALIZABLE 3

Definition at line 39 of file xact.h.

◆ XACT_XINFO_HAS_AE_LOCKS

#define XACT_XINFO_HAS_AE_LOCKS (1U << 6)

Definition at line 194 of file xact.h.

◆ XACT_XINFO_HAS_DBINFO

#define XACT_XINFO_HAS_DBINFO (1U << 0)

Definition at line 188 of file xact.h.

◆ XACT_XINFO_HAS_DROPPED_STATS

#define XACT_XINFO_HAS_DROPPED_STATS (1U << 8)

Definition at line 196 of file xact.h.

◆ XACT_XINFO_HAS_GID

#define XACT_XINFO_HAS_GID (1U << 7)

Definition at line 195 of file xact.h.

◆ XACT_XINFO_HAS_INVALS

#define XACT_XINFO_HAS_INVALS (1U << 3)

Definition at line 191 of file xact.h.

◆ XACT_XINFO_HAS_ORIGIN

#define XACT_XINFO_HAS_ORIGIN (1U << 5)

Definition at line 193 of file xact.h.

◆ XACT_XINFO_HAS_RELFILELOCATORS

#define XACT_XINFO_HAS_RELFILELOCATORS (1U << 2)

Definition at line 190 of file xact.h.

◆ XACT_XINFO_HAS_SUBXACTS

#define XACT_XINFO_HAS_SUBXACTS (1U << 1)

Definition at line 189 of file xact.h.

◆ XACT_XINFO_HAS_TWOPHASE

#define XACT_XINFO_HAS_TWOPHASE (1U << 4)

Definition at line 192 of file xact.h.

◆ XactCompletionApplyFeedback

#define XactCompletionApplyFeedback ( xinfo ) ((xinfo & XACT_COMPLETION_APPLY_FEEDBACK) != 0)

Definition at line 211 of file xact.h.

◆ XactCompletionForceSyncCommit

#define XactCompletionForceSyncCommit ( xinfo ) ((xinfo & XACT_COMPLETION_FORCE_SYNC_COMMIT) != 0)

Definition at line 215 of file xact.h.

◆ XactCompletionRelcacheInitFileInval

#define XactCompletionRelcacheInitFileInval ( xinfo ) ((xinfo & XACT_COMPLETION_UPDATE_RELCACHE_FILE) != 0)

Definition at line 213 of file xact.h.

◆ XLOG_XACT_ABORT

#define XLOG_XACT_ABORT 0x20

Definition at line 171 of file xact.h.

◆ XLOG_XACT_ABORT_PREPARED

#define XLOG_XACT_ABORT_PREPARED 0x40

Definition at line 173 of file xact.h.

◆ XLOG_XACT_ASSIGNMENT

#define XLOG_XACT_ASSIGNMENT 0x50

Definition at line 174 of file xact.h.

◆ XLOG_XACT_COMMIT

#define XLOG_XACT_COMMIT 0x00

Definition at line 169 of file xact.h.

◆ XLOG_XACT_COMMIT_PREPARED

#define XLOG_XACT_COMMIT_PREPARED 0x30

Definition at line 172 of file xact.h.

◆ XLOG_XACT_HAS_INFO

#define XLOG_XACT_HAS_INFO 0x80

Definition at line 182 of file xact.h.

◆ XLOG_XACT_INVALIDATIONS

#define XLOG_XACT_INVALIDATIONS 0x60

Definition at line 175 of file xact.h.

◆ XLOG_XACT_OPMASK

#define XLOG_XACT_OPMASK 0x70

Definition at line 179 of file xact.h.

◆ XLOG_XACT_PREPARE

#define XLOG_XACT_PREPARE 0x10

Definition at line 170 of file xact.h.

Typedef Documentation

◆ SavedTransactionCharacteristics

typedef struct SavedTransactionCharacteristics SavedTransactionCharacteristics

◆ SubXactCallback

typedef void(* SubXactCallback) (SubXactEvent event, SubTransactionId mySubid, SubTransactionId parentSubid, void *arg)

Definition at line 148 of file xact.h.

◆ XactCallback

typedef void(* XactCallback) (XactEvent event, void *arg)

Definition at line 138 of file xact.h.

◆ xl_xact_abort

typedef struct xl_xact_abort xl_xact_abort

◆ xl_xact_assignment

typedef struct xl_xact_assignment xl_xact_assignment

◆ xl_xact_commit

typedef struct xl_xact_commit xl_xact_commit

◆ xl_xact_dbinfo

typedef struct xl_xact_dbinfo xl_xact_dbinfo

◆ xl_xact_invals

typedef struct xl_xact_invals xl_xact_invals

◆ xl_xact_origin

typedef struct xl_xact_origin xl_xact_origin

◆ xl_xact_parsed_abort

typedef struct xl_xact_parsed_abort xl_xact_parsed_abort

◆ xl_xact_parsed_commit

typedef struct xl_xact_parsed_commit xl_xact_parsed_commit

◆ xl_xact_parsed_prepare

typedef xl_xact_parsed_commit xl_xact_parsed_prepare

Definition at line 408 of file xact.h.

◆ xl_xact_prepare

typedef struct xl_xact_prepare xl_xact_prepare

◆ xl_xact_relfilelocators

typedef struct xl_xact_relfilelocators xl_xact_relfilelocators

◆ xl_xact_stats_item

typedef struct xl_xact_stats_item xl_xact_stats_item

◆ xl_xact_stats_items

typedef struct xl_xact_stats_items xl_xact_stats_items

◆ xl_xact_subxacts

typedef struct xl_xact_subxacts xl_xact_subxacts

◆ xl_xact_twophase

typedef struct xl_xact_twophase xl_xact_twophase

◆ xl_xact_xinfo

typedef struct xl_xact_xinfo xl_xact_xinfo

Enumeration Type Documentation

◆ SubXactEvent

enum SubXactEvent

Enumerator
SUBXACT_EVENT_START_SUB
SUBXACT_EVENT_COMMIT_SUB
SUBXACT_EVENT_ABORT_SUB
SUBXACT_EVENT_PRE_COMMIT_SUB

Definition at line 140 of file xact.h.

{
    SUBXACT_EVENT_START_SUB,
    SUBXACT_EVENT_COMMIT_SUB,
    SUBXACT_EVENT_ABORT_SUB,
    SUBXACT_EVENT_PRE_COMMIT_SUB,
} SubXactEvent;

◆ SyncCommitLevel

enum SyncCommitLevel

Enumerator
SYNCHRONOUS_COMMIT_OFF
SYNCHRONOUS_COMMIT_LOCAL_FLUSH
SYNCHRONOUS_COMMIT_REMOTE_WRITE
SYNCHRONOUS_COMMIT_REMOTE_FLUSH
SYNCHRONOUS_COMMIT_REMOTE_APPLY

Definition at line 68 of file xact.h.

{
    SYNCHRONOUS_COMMIT_OFF,     /* asynchronous commit */
    SYNCHRONOUS_COMMIT_LOCAL_FLUSH, /* wait for local flush only */
    SYNCHRONOUS_COMMIT_REMOTE_WRITE,    /* wait for local flush and remote
                                         * write */
    SYNCHRONOUS_COMMIT_REMOTE_FLUSH,    /* wait for local and remote flush */
    SYNCHRONOUS_COMMIT_REMOTE_APPLY,    /* wait for local and remote flush and
                                         * remote apply */
}           SyncCommitLevel;

◆ XactEvent

enum XactEvent

Enumerator
XACT_EVENT_COMMIT
XACT_EVENT_PARALLEL_COMMIT
XACT_EVENT_ABORT
XACT_EVENT_PARALLEL_ABORT
XACT_EVENT_PREPARE
XACT_EVENT_PRE_COMMIT
XACT_EVENT_PARALLEL_PRE_COMMIT
XACT_EVENT_PRE_PREPARE

Definition at line 126 of file xact.h.

{
    XACT_EVENT_COMMIT,
    XACT_EVENT_PARALLEL_COMMIT,
    XACT_EVENT_ABORT,
    XACT_EVENT_PARALLEL_ABORT,
    XACT_EVENT_PREPARE,
    XACT_EVENT_PRE_COMMIT,
    XACT_EVENT_PARALLEL_PRE_COMMIT,
    XACT_EVENT_PRE_PREPARE,
} XactEvent;

Function Documentation

◆ AbortCurrentTransaction()

void AbortCurrentTransaction ( void )

Definition at line 3451 of file xact.c.

{
    /*
     * Repeatedly call AbortCurrentTransactionInternal() until all the work is
     * done.
     */
    while (!AbortCurrentTransactionInternal())
    {
    }
}

References AbortCurrentTransactionInternal().

Referenced by _SPI_commit(), _SPI_rollback(), AutoVacLauncherMain(), pa_stream_abort(), PostgresMain(), ReorderBufferImmediateInvalidation(), ReorderBufferProcessTXN(), and SnapBuildClearExportedSnapshot().

◆ AbortOutOfAnyTransaction()

void AbortOutOfAnyTransaction ( void )

Definition at line 4862 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    /* Ensure we're not running in a doomed memory context */
    AtAbort_Memory();
 
    /*
     * Get out of any transaction or nested transaction
     */
    do
    {
        switch (s->blockState)
        {
            case TBLOCK_DEFAULT:
                if (s->state == TRANS_DEFAULT)
                {
                    /* Not in a transaction, do nothing */
                }
                else
                {
                    /*
                     * We can get here after an error during transaction start
                     * (state will be TRANS_START).  Need to clean up the
                     * incompletely started transaction.  First, adjust the
                     * low-level state to suppress warning message from
                     * AbortTransaction.
                     */
                    if (s->state == TRANS_START)
                        s->state = TRANS_INPROGRESS;
                    AbortTransaction();
                    CleanupTransaction();
                }
                break;
            case TBLOCK_STARTED:
            case TBLOCK_BEGIN:
            case TBLOCK_INPROGRESS:
            case TBLOCK_IMPLICIT_INPROGRESS:
            case TBLOCK_PARALLEL_INPROGRESS:
            case TBLOCK_END:
            case TBLOCK_ABORT_PENDING:
            case TBLOCK_PREPARE:
                /* In a transaction, so clean up */
                AbortTransaction();
                CleanupTransaction();
                s->blockState = TBLOCK_DEFAULT;
                break;
            case TBLOCK_ABORT:
            case TBLOCK_ABORT_END:
 
                /*
                 * AbortTransaction is already done, still need Cleanup.
                 * However, if we failed partway through running ROLLBACK,
                 * there will be an active portal running that command, which
                 * we need to shut down before doing CleanupTransaction.
                 */
                AtAbort_Portals();
                CleanupTransaction();
                s->blockState = TBLOCK_DEFAULT;
                break;
 
                /*
                 * In a subtransaction, so clean it up and abort parent too
                 */
            case TBLOCK_SUBBEGIN:
            case TBLOCK_SUBINPROGRESS:
            case TBLOCK_SUBRELEASE:
            case TBLOCK_SUBCOMMIT:
            case TBLOCK_SUBABORT_PENDING:
            case TBLOCK_SUBRESTART:
                AbortSubTransaction();
                CleanupSubTransaction();
                s = CurrentTransactionState;    /* changed by pop */
                break;
 
            case TBLOCK_SUBABORT:
            case TBLOCK_SUBABORT_END:
            case TBLOCK_SUBABORT_RESTART:
                /* As above, but AbortSubTransaction already done */
                if (s->curTransactionOwner)
                {
                    /* As in TBLOCK_ABORT, might have a live portal to zap */
                    AtSubAbort_Portals(s->subTransactionId,
                                       s->parent->subTransactionId,
                                       s->curTransactionOwner,
                                       s->parent->curTransactionOwner);
                }
                CleanupSubTransaction();
                s = CurrentTransactionState;    /* changed by pop */
                break;
        }
    } while (s->blockState != TBLOCK_DEFAULT);
 
    /* Should be out of all subxacts now */
    Assert(s->parent == NULL);
 
    /*
     * Revert to TopMemoryContext, to ensure we exit in a well-defined state
     * whether there were any transactions to close or not.  (Callers that
     * don't intend to exit soon should switch to some other context to avoid
     * long-term memory leaks.)
     */
    MemoryContextSwitchTo(TopMemoryContext);
}

References AbortSubTransaction(), AbortTransaction(), Assert(), AtAbort_Memory(), AtAbort_Portals(), AtSubAbort_Portals(), TransactionStateData::blockState, CleanupSubTransaction(), CleanupTransaction(), CurrentTransactionState, TransactionStateData::curTransactionOwner, MemoryContextSwitchTo(), TransactionStateData::parent, TransactionStateData::state, TransactionStateData::subTransactionId, TBLOCK_ABORT, TBLOCK_ABORT_END, TBLOCK_ABORT_PENDING, TBLOCK_BEGIN, TBLOCK_DEFAULT, TBLOCK_END, TBLOCK_IMPLICIT_INPROGRESS, TBLOCK_INPROGRESS, TBLOCK_PARALLEL_INPROGRESS, TBLOCK_PREPARE, TBLOCK_STARTED, TBLOCK_SUBABORT, TBLOCK_SUBABORT_END, TBLOCK_SUBABORT_PENDING, TBLOCK_SUBABORT_RESTART, TBLOCK_SUBBEGIN, TBLOCK_SUBCOMMIT, TBLOCK_SUBINPROGRESS, TBLOCK_SUBRELEASE, TBLOCK_SUBRESTART, TopMemoryContext, TRANS_DEFAULT, TRANS_INPROGRESS, and TRANS_START.

Referenced by DisableSubscriptionAndExit(), do_autovacuum(), perform_work_item(), RemoveTempRelationsCallback(), ShutdownPostgres(), start_apply(), and start_table_sync().

◆ BeginImplicitTransactionBlock()

void BeginImplicitTransactionBlock ( void )

Definition at line 4326 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    /*
     * If we are in STARTED state (that is, no transaction block is open),
     * switch to IMPLICIT_INPROGRESS state, creating an implicit transaction
     * block.
     *
     * For caller convenience, we consider all other transaction states as
     * legal here; otherwise the caller would need its own state check, which
     * seems rather pointless.
     */
    if (s->blockState == TBLOCK_STARTED)
        s->blockState = TBLOCK_IMPLICIT_INPROGRESS;
}

References TransactionStateData::blockState, CurrentTransactionState, TBLOCK_IMPLICIT_INPROGRESS, and TBLOCK_STARTED.

Referenced by exec_simple_query(), and start_xact_command().

◆ BeginInternalSubTransaction()

void BeginInternalSubTransaction ( const char * name )

Definition at line 4694 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
    bool        save_ExitOnAnyError = ExitOnAnyError;
 
    /*
     * Errors within this function are improbable, but if one does happen we
     * force a FATAL exit.  Callers generally aren't prepared to handle losing
     * control, and moreover our transaction state is probably corrupted if we
     * fail partway through; so an ordinary ERROR longjmp isn't okay.
     */
    ExitOnAnyError = true;
 
    /*
     * We do not check for parallel mode here.  It's permissible to start and
     * end "internal" subtransactions while in parallel mode, so long as no
     * new XIDs or command IDs are assigned.  Enforcement of that occurs in
     * AssignTransactionId() and CommandCounterIncrement().
     */
 
    switch (s->blockState)
    {
        case TBLOCK_STARTED:
        case TBLOCK_INPROGRESS:
        case TBLOCK_IMPLICIT_INPROGRESS:
        case TBLOCK_PARALLEL_INPROGRESS:
        case TBLOCK_END:
        case TBLOCK_PREPARE:
        case TBLOCK_SUBINPROGRESS:
            /* Normal subtransaction start */
            PushTransaction();
            s = CurrentTransactionState;    /* changed by push */
 
            /*
             * Savepoint names, like the TransactionState block itself, live
             * in TopTransactionContext.
             */
            if (name)
                s->name = MemoryContextStrdup(TopTransactionContext, name);
            break;
 
            /* These cases are invalid. */
        case TBLOCK_DEFAULT:
        case TBLOCK_BEGIN:
        case TBLOCK_SUBBEGIN:
        case TBLOCK_SUBRELEASE:
        case TBLOCK_SUBCOMMIT:
        case TBLOCK_ABORT:
        case TBLOCK_SUBABORT:
        case TBLOCK_ABORT_END:
        case TBLOCK_SUBABORT_END:
        case TBLOCK_ABORT_PENDING:
        case TBLOCK_SUBABORT_PENDING:
        case TBLOCK_SUBRESTART:
        case TBLOCK_SUBABORT_RESTART:
            elog(FATAL, "BeginInternalSubTransaction: unexpected state %s",
                 BlockStateAsString(s->blockState));
            break;
    }
 
    CommitTransactionCommand();
    StartTransactionCommand();
 
    ExitOnAnyError = save_ExitOnAnyError;
}

References TransactionStateData::blockState, BlockStateAsString(), CommitTransactionCommand(), CurrentTransactionState, elog, ExitOnAnyError, FATAL, MemoryContextStrdup(), TransactionStateData::name, name, PushTransaction(), StartTransactionCommand(), TBLOCK_ABORT, TBLOCK_ABORT_END, TBLOCK_ABORT_PENDING, TBLOCK_BEGIN, TBLOCK_DEFAULT, TBLOCK_END, TBLOCK_IMPLICIT_INPROGRESS, TBLOCK_INPROGRESS, TBLOCK_PARALLEL_INPROGRESS, TBLOCK_PREPARE, TBLOCK_STARTED, TBLOCK_SUBABORT, TBLOCK_SUBABORT_END, TBLOCK_SUBABORT_PENDING, TBLOCK_SUBABORT_RESTART, TBLOCK_SUBBEGIN, TBLOCK_SUBCOMMIT, TBLOCK_SUBINPROGRESS, TBLOCK_SUBRELEASE, TBLOCK_SUBRESTART, and TopTransactionContext.

Referenced by exec_stmt_block(), plperl_spi_exec(), plperl_spi_exec_prepared(), plperl_spi_fetchrow(), plperl_spi_prepare(), plperl_spi_query(), plperl_spi_query_prepared(), pltcl_returnnext(), pltcl_subtrans_begin(), pltcl_subtransaction(), PLy_spi_subtransaction_begin(), PLy_subtransaction_enter(), ReorderBufferImmediateInvalidation(), and ReorderBufferProcessTXN().

◆ BeginTransactionBlock()

void BeginTransactionBlock ( void )

Definition at line 3924 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    switch (s->blockState)
    {
            /*
             * We are not inside a transaction block, so allow one to begin.
             */
        case TBLOCK_STARTED:
            s->blockState = TBLOCK_BEGIN;
            break;
 
            /*
             * BEGIN converts an implicit transaction block to a regular one.
             * (Note that we allow this even if we've already done some
             * commands, which is a bit odd but matches historical practice.)
             */
        case TBLOCK_IMPLICIT_INPROGRESS:
            s->blockState = TBLOCK_BEGIN;
            break;
 
            /*
             * Already a transaction block in progress.
             */
        case TBLOCK_INPROGRESS:
        case TBLOCK_PARALLEL_INPROGRESS:
        case TBLOCK_SUBINPROGRESS:
        case TBLOCK_ABORT:
        case TBLOCK_SUBABORT:
            ereport(WARNING,
                    (errcode(ERRCODE_ACTIVE_SQL_TRANSACTION),
                     errmsg("there is already a transaction in progress")));
            break;
 
            /* These cases are invalid. */
        case TBLOCK_DEFAULT:
        case TBLOCK_BEGIN:
        case TBLOCK_SUBBEGIN:
        case TBLOCK_END:
        case TBLOCK_SUBRELEASE:
        case TBLOCK_SUBCOMMIT:
        case TBLOCK_ABORT_END:
        case TBLOCK_SUBABORT_END:
        case TBLOCK_ABORT_PENDING:
        case TBLOCK_SUBABORT_PENDING:
        case TBLOCK_SUBRESTART:
        case TBLOCK_SUBABORT_RESTART:
        case TBLOCK_PREPARE:
            elog(FATAL, "BeginTransactionBlock: unexpected state %s",
                 BlockStateAsString(s->blockState));
            break;
    }
}

References TransactionStateData::blockState, BlockStateAsString(), CurrentTransactionState, elog, ereport, errcode(), errmsg(), FATAL, TBLOCK_ABORT, TBLOCK_ABORT_END, TBLOCK_ABORT_PENDING, TBLOCK_BEGIN, TBLOCK_DEFAULT, TBLOCK_END, TBLOCK_IMPLICIT_INPROGRESS, TBLOCK_INPROGRESS, TBLOCK_PARALLEL_INPROGRESS, TBLOCK_PREPARE, TBLOCK_STARTED, TBLOCK_SUBABORT, TBLOCK_SUBABORT_END, TBLOCK_SUBABORT_PENDING, TBLOCK_SUBABORT_RESTART, TBLOCK_SUBBEGIN, TBLOCK_SUBCOMMIT, TBLOCK_SUBINPROGRESS, TBLOCK_SUBRELEASE, TBLOCK_SUBRESTART, and WARNING.

Referenced by apply_handle_prepare_internal(), pa_start_subtrans(), and standard_ProcessUtility().

◆ CommandCounterIncrement()

void CommandCounterIncrement ( void )

Definition at line 1100 of file xact.c.

{
    /*
     * If the current value of the command counter hasn't been "used" to mark
     * tuples, we need not increment it, since there's no need to distinguish
     * a read-only command from others.  This helps postpone command counter
     * overflow, and keeps no-op CommandCounterIncrement operations cheap.
     */
    if (currentCommandIdUsed)
    {
        /*
         * Workers synchronize transaction state at the beginning of each
         * parallel operation, so we can't account for new commands after that
         * point.
         */
        if (IsInParallelMode() || IsParallelWorker())
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_TRANSACTION_STATE),
                     errmsg("cannot start commands during a parallel operation")));
 
        currentCommandId += 1;
        if (currentCommandId == InvalidCommandId)
        {
            currentCommandId -= 1;
            ereport(ERROR,
                    (errcode(ERRCODE_PROGRAM_LIMIT_EXCEEDED),
                     errmsg("cannot have more than 2^32-2 commands in a transaction")));
        }
        currentCommandIdUsed = false;
 
        /* Propagate new command ID into static snapshots */
        SnapshotSetCommandId(currentCommandId);
 
        /*
         * Make any catalog changes done by the just-completed command visible
         * in the local syscache.  We obviously don't need to do this after a
         * read-only command.  (But see hacks in inval.c to make real sure we
         * don't think a command that queued inval messages was read-only.)
         */
        AtCCI_LocalCache();
    }
}

References AtCCI_LocalCache(), currentCommandId, currentCommandIdUsed, ereport, errcode(), errmsg(), ERROR, InvalidCommandId, IsInParallelMode(), IsParallelWorker, and SnapshotSetCommandId().

Referenced by _SPI_execute_plan(), acquire_inherited_sample_rows(), addFkConstraint(), AddRoleMems(), AlterPublicationOptions(), AlterRole(), ATAddCheckNNConstraint(), ATExecAddColumn(), ATExecAlterColumnType(), ATExecAlterConstrInheritability(), ATExecCmd(), ATExecDropColumn(), ATExecDropExpression(), ATExecDropIdentity(), ATExecSetAccessMethodNoStorage(), ATExecSetCompression(), ATExecSetExpression(), ATExecSetNotNull(), ATExecSetTableSpace(), ATExecSetTableSpaceNoStorage(), ATParseTransformCmd(), ATRewriteTables(), AttachPartitionEnsureIndexes(), AttachPartitionForeignKey(), btadjustmembers(), CommitSubTransaction(), CommitTransactionCommandInternal(), copy_table_data(), create_ctas_internal(), create_toast_table(), CreateFKCheckTrigger(), createForeignKeyActionTriggers(), CreateForeignTable(), CreatePublication(), CreateRole(), CreateSchemaCommand(), CreateTriggerFiringOn(), DefineCollation(), DefineDomain(), DefineIndex(), DefineRelation(), DefineVirtualRelation(), delete_pg_statistic(), deleteOneObject(), DetachPartitionFinalize(), do_analyze_rel(), DropClonedTriggersFromPartition(), dropconstraint_internal(), DropForeignKeyConstraintTriggers(), DropRole(), end_replication_step(), EventTriggerDDLCommandEnd(), EventTriggerDDLCommandStart(), EventTriggerInvoke(), EventTriggerSQLDrop(), EventTriggerTableRewrite(), exec_eval_simple_expr(), exec_execute_message(), exec_parse_message(), exec_simple_query(), ExecGrant_common(), ExecGrant_Largeobject(), ExecGrant_Parameter(), ExecGrant_Relation(), execute_sql_string(), ExplainOnePlan(), finish_heap_swap(), fmgr_sql(), hashadjustmembers(), ImportForeignSchema(), index_build(), index_create(), IndexSetParentIndex(), InitTempTableNamespace(), inv_create(), inv_drop(), inv_truncate(), inv_write(), LogicalRepSyncTableStart(), make_new_heap(), makeConfigurationDependencies(), moveArrayTypeName(), objectNamesToOids(), OperatorShellMake(), OperatorUpd(), pg_import_system_collations(), PortalRunMulti(), ProcedureCreate(), process_syncing_tables_for_apply(), ProcessUtilitySlow(), recordExtensionInitPrivWorker(), reindex_index(), reindex_relation(), ReindexRelationConcurrently(), relation_statistics_update(), RelationSetNewRelfilenumber(), RemoveInheritedConstraint(), RemoveRoleFromInitPriv(), RemoveRoleFromObjectPolicy(), RenumberEnumType(), ReplaceRoleInInitPriv(), replorigin_create(), replorigin_drop_by_name(), ri_PerformCheck(), set_attnotnull(), SetDatabaseHasLoginEventTriggers(), SetDefaultACL(), SetMatViewPopulatedState(), shdepReassignOwned(), SPI_cursor_open_internal(), standard_ProcessUtility(), StoreConstraints(), StorePartitionBound(), upsert_pg_statistic(), vacuum(), and validatePartitionedIndex().

◆ CommitTransactionCommand()

void CommitTransactionCommand ( void )

Definition at line 3157 of file xact.c.

{
    /*
     * Repeatedly call CommitTransactionCommandInternal() until all the work
     * is done.
     */
    while (!CommitTransactionCommandInternal())
    {
    }
}

References CommitTransactionCommandInternal().

Referenced by _SPI_commit(), AllTablesyncsReady(), apply_handle_commit_internal(), apply_handle_commit_prepared(), apply_handle_prepare(), apply_handle_prepare_internal(), apply_handle_rollback_prepared(), apply_handle_stream_prepare(), ATExecDetachPartition(), autoprewarm_database_main(), bbsink_server_new(), BeginInternalSubTransaction(), BootstrapModeMain(), clear_subscription_skip_lsn(), cluster_multiple_rels(), DefineIndex(), DisableSubscriptionAndExit(), do_autovacuum(), EventTriggerOnLogin(), exec_replication_command(), finish_sync_worker(), finish_xact_command(), get_database_list(), get_subscription_list(), IdentifySystem(), index_drop(), initialize_worker_spi(), InitializeLogRepWorker(), InitPostgres(), LogicalRepSyncTableStart(), maybe_reread_subscription(), movedb(), pa_start_subtrans(), pa_stream_abort(), ParallelApplyWorkerMain(), ParallelWorkerMain(), process_syncing_tables_for_apply(), process_syncing_tables_for_sync(), ProcessCatchupInterrupt(), ProcessIncomingNotify(), ReindexMultipleInternal(), ReindexRelationConcurrently(), RemoveTempRelationsCallback(), run_apply_worker(), shell_check_detail(), stream_abort_internal(), stream_stop_internal(), synchronize_slots(), vacuum(), vacuum_rel(), validate_remote_info(), and worker_spi_main().

◆ DefineSavepoint()

void DefineSavepoint ( const char * name )

Definition at line 4373 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    /*
     * Workers synchronize transaction state at the beginning of each parallel
     * operation, so we can't account for new subtransactions after that
     * point.  (Note that this check will certainly error out if s->blockState
     * is TBLOCK_PARALLEL_INPROGRESS, so we can treat that as an invalid case
     * below.)
     */
    if (IsInParallelMode() || IsParallelWorker())
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_TRANSACTION_STATE),
                 errmsg("cannot define savepoints during a parallel operation")));
 
    switch (s->blockState)
    {
        case TBLOCK_INPROGRESS:
        case TBLOCK_SUBINPROGRESS:
            /* Normal subtransaction start */
            PushTransaction();
            s = CurrentTransactionState;    /* changed by push */
 
            /*
             * Savepoint names, like the TransactionState block itself, live
             * in TopTransactionContext.
             */
            if (name)
                s->name = MemoryContextStrdup(TopTransactionContext, name);
            break;
 
            /*
             * We disallow savepoint commands in implicit transaction blocks.
             * There would be no great difficulty in allowing them so far as
             * this module is concerned, but a savepoint seems inconsistent
             * with exec_simple_query's behavior of abandoning the whole query
             * string upon error.  Also, the point of an implicit transaction
             * block (as opposed to a regular one) is to automatically close
             * after an error, so it's hard to see how a savepoint would fit
             * into that.
             *
             * The error messages for this are phrased as if there were no
             * active transaction block at all, which is historical but
             * perhaps could be improved.
             */
        case TBLOCK_IMPLICIT_INPROGRESS:
            ereport(ERROR,
                    (errcode(ERRCODE_NO_ACTIVE_SQL_TRANSACTION),
            /* translator: %s represents an SQL statement name */
                     errmsg("%s can only be used in transaction blocks",
                            "SAVEPOINT")));
            break;
 
            /* These cases are invalid. */
        case TBLOCK_DEFAULT:
        case TBLOCK_STARTED:
        case TBLOCK_BEGIN:
        case TBLOCK_PARALLEL_INPROGRESS:
        case TBLOCK_SUBBEGIN:
        case TBLOCK_END:
        case TBLOCK_SUBRELEASE:
        case TBLOCK_SUBCOMMIT:
        case TBLOCK_ABORT:
        case TBLOCK_SUBABORT:
        case TBLOCK_ABORT_END:
        case TBLOCK_SUBABORT_END:
        case TBLOCK_ABORT_PENDING:
        case TBLOCK_SUBABORT_PENDING:
        case TBLOCK_SUBRESTART:
        case TBLOCK_SUBABORT_RESTART:
        case TBLOCK_PREPARE:
            elog(FATAL, "DefineSavepoint: unexpected state %s",
                 BlockStateAsString(s->blockState));
            break;
    }
}

References TransactionStateData::blockState, BlockStateAsString(), CurrentTransactionState, elog, ereport, errcode(), errmsg(), ERROR, FATAL, IsInParallelMode(), IsParallelWorker, MemoryContextStrdup(), TransactionStateData::name, name, PushTransaction(), TBLOCK_ABORT, TBLOCK_ABORT_END, TBLOCK_ABORT_PENDING, TBLOCK_BEGIN, TBLOCK_DEFAULT, TBLOCK_END, TBLOCK_IMPLICIT_INPROGRESS, TBLOCK_INPROGRESS, TBLOCK_PARALLEL_INPROGRESS, TBLOCK_PREPARE, TBLOCK_STARTED, TBLOCK_SUBABORT, TBLOCK_SUBABORT_END, TBLOCK_SUBABORT_PENDING, TBLOCK_SUBABORT_RESTART, TBLOCK_SUBBEGIN, TBLOCK_SUBCOMMIT, TBLOCK_SUBINPROGRESS, TBLOCK_SUBRELEASE, TBLOCK_SUBRESTART, and TopTransactionContext.

Referenced by CommitTransactionCommandInternal(), pa_start_subtrans(), and standard_ProcessUtility().

◆ EndImplicitTransactionBlock()

void EndImplicitTransactionBlock ( void )

Definition at line 4351 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    /*
     * If we are in IMPLICIT_INPROGRESS state, switch back to STARTED state,
     * allowing CommitTransactionCommand to commit whatever happened during
     * the implicit transaction block as though it were a single statement.
     *
     * For caller convenience, we consider all other transaction states as
     * legal here; otherwise the caller would need its own state check, which
     * seems rather pointless.
     */
    if (s->blockState == TBLOCK_IMPLICIT_INPROGRESS)
        s->blockState = TBLOCK_STARTED;
}

References TransactionStateData::blockState, CurrentTransactionState, TBLOCK_IMPLICIT_INPROGRESS, and TBLOCK_STARTED.

Referenced by exec_simple_query(), and PostgresMain().

◆ EndParallelWorkerTransaction()

void EndParallelWorkerTransaction ( void )

Definition at line 5636 of file xact.c.

{
    Assert(CurrentTransactionState->blockState == TBLOCK_PARALLEL_INPROGRESS);
    CommitTransaction();
    CurrentTransactionState->blockState = TBLOCK_DEFAULT;
}

References Assert(), TransactionStateData::blockState, CommitTransaction(), CurrentTransactionState, TBLOCK_DEFAULT, and TBLOCK_PARALLEL_INPROGRESS.

Referenced by ParallelWorkerMain().

◆ EndTransactionBlock()

bool EndTransactionBlock ( bool chain )

Definition at line 4044 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
    bool        result = false;
 
    switch (s->blockState)
    {
            /*
             * We are in a transaction block, so tell CommitTransactionCommand
             * to COMMIT.
             */
        case TBLOCK_INPROGRESS:
            s->blockState = TBLOCK_END;
            result = true;
            break;
 
            /*
             * We are in an implicit transaction block.  If AND CHAIN was
             * specified, error.  Otherwise commit, but issue a warning
             * because there was no explicit BEGIN before this.
             */
        case TBLOCK_IMPLICIT_INPROGRESS:
            if (chain)
                ereport(ERROR,
                        (errcode(ERRCODE_NO_ACTIVE_SQL_TRANSACTION),
                /* translator: %s represents an SQL statement name */
                         errmsg("%s can only be used in transaction blocks",
                                "COMMIT AND CHAIN")));
            else
                ereport(WARNING,
                        (errcode(ERRCODE_NO_ACTIVE_SQL_TRANSACTION),
                         errmsg("there is no transaction in progress")));
            s->blockState = TBLOCK_END;
            result = true;
            break;
 
            /*
             * We are in a failed transaction block.  Tell
             * CommitTransactionCommand it's time to exit the block.
             */
        case TBLOCK_ABORT:
            s->blockState = TBLOCK_ABORT_END;
            break;
 
            /*
             * We are in a live subtransaction block.  Set up to subcommit all
             * open subtransactions and then commit the main transaction.
             */
        case TBLOCK_SUBINPROGRESS:
            while (s->parent != NULL)
            {
                if (s->blockState == TBLOCK_SUBINPROGRESS)
                    s->blockState = TBLOCK_SUBCOMMIT;
                else
                    elog(FATAL, "EndTransactionBlock: unexpected state %s",
                         BlockStateAsString(s->blockState));
                s = s->parent;
            }
            if (s->blockState == TBLOCK_INPROGRESS)
                s->blockState = TBLOCK_END;
            else
                elog(FATAL, "EndTransactionBlock: unexpected state %s",
                     BlockStateAsString(s->blockState));
            result = true;
            break;
 
            /*
             * Here we are inside an aborted subtransaction.  Treat the COMMIT
             * as ROLLBACK: set up to abort everything and exit the main
             * transaction.
             */
        case TBLOCK_SUBABORT:
            while (s->parent != NULL)
            {
                if (s->blockState == TBLOCK_SUBINPROGRESS)
                    s->blockState = TBLOCK_SUBABORT_PENDING;
                else if (s->blockState == TBLOCK_SUBABORT)
                    s->blockState = TBLOCK_SUBABORT_END;
                else
                    elog(FATAL, "EndTransactionBlock: unexpected state %s",
                         BlockStateAsString(s->blockState));
                s = s->parent;
            }
            if (s->blockState == TBLOCK_INPROGRESS)
                s->blockState = TBLOCK_ABORT_PENDING;
            else if (s->blockState == TBLOCK_ABORT)
                s->blockState = TBLOCK_ABORT_END;
            else
                elog(FATAL, "EndTransactionBlock: unexpected state %s",
                     BlockStateAsString(s->blockState));
            break;
 
            /*
             * The user issued COMMIT when not inside a transaction.  For
             * COMMIT without CHAIN, issue a WARNING, staying in
             * TBLOCK_STARTED state.  The upcoming call to
             * CommitTransactionCommand() will then close the transaction and
             * put us back into the default state.  For COMMIT AND CHAIN,
             * error.
             */
        case TBLOCK_STARTED:
            if (chain)
                ereport(ERROR,
                        (errcode(ERRCODE_NO_ACTIVE_SQL_TRANSACTION),
                /* translator: %s represents an SQL statement name */
                         errmsg("%s can only be used in transaction blocks",
                                "COMMIT AND CHAIN")));
            else
                ereport(WARNING,
                        (errcode(ERRCODE_NO_ACTIVE_SQL_TRANSACTION),
                         errmsg("there is no transaction in progress")));
            result = true;
            break;
 
            /*
             * The user issued a COMMIT that somehow ran inside a parallel
             * worker.  We can't cope with that.
             */
        case TBLOCK_PARALLEL_INPROGRESS:
            ereport(FATAL,
                    (errcode(ERRCODE_INVALID_TRANSACTION_STATE),
                     errmsg("cannot commit during a parallel operation")));
            break;
 
            /* These cases are invalid. */
        case TBLOCK_DEFAULT:
        case TBLOCK_BEGIN:
        case TBLOCK_SUBBEGIN:
        case TBLOCK_END:
        case TBLOCK_SUBRELEASE:
        case TBLOCK_SUBCOMMIT:
        case TBLOCK_ABORT_END:
        case TBLOCK_SUBABORT_END:
        case TBLOCK_ABORT_PENDING:
        case TBLOCK_SUBABORT_PENDING:
        case TBLOCK_SUBRESTART:
        case TBLOCK_SUBABORT_RESTART:
        case TBLOCK_PREPARE:
            elog(FATAL, "EndTransactionBlock: unexpected state %s",
                 BlockStateAsString(s->blockState));
            break;
    }
 
    Assert(s->blockState == TBLOCK_STARTED ||
           s->blockState == TBLOCK_END ||
           s->blockState == TBLOCK_ABORT_END ||
           s->blockState == TBLOCK_ABORT_PENDING);
 
    s->chain = chain;
 
    return result;
}

References Assert(), TransactionStateData::blockState, BlockStateAsString(), TransactionStateData::chain, CurrentTransactionState, elog, ereport, errcode(), errmsg(), ERROR, FATAL, TransactionStateData::parent, TBLOCK_ABORT, TBLOCK_ABORT_END, TBLOCK_ABORT_PENDING, TBLOCK_BEGIN, TBLOCK_DEFAULT, TBLOCK_END, TBLOCK_IMPLICIT_INPROGRESS, TBLOCK_INPROGRESS, TBLOCK_PARALLEL_INPROGRESS, TBLOCK_PREPARE, TBLOCK_STARTED, TBLOCK_SUBABORT, TBLOCK_SUBABORT_END, TBLOCK_SUBABORT_PENDING, TBLOCK_SUBABORT_RESTART, TBLOCK_SUBBEGIN, TBLOCK_SUBCOMMIT, TBLOCK_SUBINPROGRESS, TBLOCK_SUBRELEASE, TBLOCK_SUBRESTART, and WARNING.

Referenced by apply_handle_commit_internal(), pa_stream_abort(), PrepareTransactionBlock(), and standard_ProcessUtility().

◆ EnterParallelMode()

void EnterParallelMode ( void )

Definition at line 1051 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    Assert(s->parallelModeLevel >= 0);
 
    ++s->parallelModeLevel;
}

References Assert(), CurrentTransactionState, and TransactionStateData::parallelModeLevel.

Referenced by _brin_begin_parallel(), _bt_begin_parallel(), _gin_begin_parallel(), CommitTransaction(), ExecutePlan(), parallel_vacuum_init(), and ParallelWorkerMain().

◆ EstimateTransactionStateSpace()

Size EstimateTransactionStateSpace ( void )

Definition at line 5512 of file xact.c.

{
    TransactionState s;
    Size        nxids = 0;
    Size        size = SerializedTransactionStateHeaderSize;
 
    for (s = CurrentTransactionState; s != NULL; s = s->parent)
    {
        if (FullTransactionIdIsValid(s->fullTransactionId))
            nxids = add_size(nxids, 1);
        nxids = add_size(nxids, s->nChildXids);
    }
 
    return add_size(size, mul_size(sizeof(TransactionId), nxids));
}

References add_size(), CurrentTransactionState, TransactionStateData::fullTransactionId, FullTransactionIdIsValid, mul_size(), TransactionStateData::nChildXids, TransactionStateData::parent, and SerializedTransactionStateHeaderSize.

Referenced by InitializeParallelDSM().

◆ ExitParallelMode()

void ExitParallelMode ( void )

Definition at line 1064 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    Assert(s->parallelModeLevel > 0);
    Assert(s->parallelModeLevel > 1 || s->parallelChildXact ||
           !ParallelContextActive());
 
    --s->parallelModeLevel;
}

References Assert(), CurrentTransactionState, TransactionStateData::parallelChildXact, ParallelContextActive(), and TransactionStateData::parallelModeLevel.

Referenced by _brin_begin_parallel(), _brin_end_parallel(), _bt_begin_parallel(), _bt_end_parallel(), _gin_begin_parallel(), _gin_end_parallel(), ExecutePlan(), parallel_vacuum_end(), and ParallelWorkerMain().

◆ ForceSyncCommit()

void ForceSyncCommit ( void )

Definition at line 1152 of file xact.c.

{
    forceSyncCommit = true;
}

References forceSyncCommit.

Referenced by createdb(), CreateTableSpace(), dropdb(), DropTableSpace(), and movedb().

◆ GetCurrentCommandId()

CommandId GetCurrentCommandId ( bool used )

Definition at line 829 of file xact.c.

{
    /* this is global to a transaction, not subtransaction-local */
    if (used)
    {
        /*
         * Forbid setting currentCommandIdUsed in a parallel worker, because
         * we have no provision for communicating this back to the leader.  We
         * could relax this restriction when currentCommandIdUsed was already
         * true at the start of the parallel operation.
         */
        if (IsParallelWorker())
            ereport(ERROR,
                    (errcode(ERRCODE_INVALID_TRANSACTION_STATE),
                     errmsg("cannot modify data in a parallel worker")));
 
        currentCommandIdUsed = true;
    }
    return currentCommandId;
}

References currentCommandId, currentCommandIdUsed, ereport, errcode(), errmsg(), ERROR, and IsParallelWorker.

Referenced by ATRewriteTable(), CatalogTuplesMultiInsertWithInfo(), CopyFrom(), create_edata_for_relation(), create_estate_for_relation(), FindConflictTuple(), GetSnapshotData(), GetSnapshotDataReuse(), heap_inplace_lock(), intorel_startup(), pgrowlocks(), RegisterRelcacheInvalidation(), RelationFindReplTupleByIndex(), RelationFindReplTupleSeq(), simple_heap_delete(), simple_heap_insert(), simple_heap_update(), simple_table_tuple_delete(), simple_table_tuple_insert(), simple_table_tuple_update(), standard_ExecutorStart(), toast_save_datum(), transientrel_startup(), and UpdateActiveSnapshotCommandId().

◆ GetCurrentFullTransactionId()

FullTransactionId GetCurrentFullTransactionId ( void )

Definition at line 512 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    if (!FullTransactionIdIsValid(s->fullTransactionId))
        AssignTransactionId(s);
    return s->fullTransactionId;
}

References AssignTransactionId(), CurrentTransactionState, TransactionStateData::fullTransactionId, and FullTransactionIdIsValid.

◆ GetCurrentFullTransactionIdIfAny()

FullTransactionId GetCurrentFullTransactionIdIfAny ( void )

Definition at line 530 of file xact.c.

{
    return CurrentTransactionState->fullTransactionId;
}

References CurrentTransactionState, and TransactionStateData::fullTransactionId.

◆ GetCurrentStatementStartTimestamp()

TimestampTz GetCurrentStatementStartTimestamp ( void )

Definition at line 879 of file xact.c.

{
    return stmtStartTimestamp;
}

References stmtStartTimestamp.

Referenced by check_log_duration(), CreatePortal(), InitializeParallelDSM(), pgstat_report_activity(), statement_timestamp(), and StorePreparedStatement().

◆ GetCurrentSubTransactionId()

SubTransactionId GetCurrentSubTransactionId ( void )

Definition at line 791 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    return s->subTransactionId;
}

References CurrentTransactionState, and TransactionStateData::subTransactionId.

Referenced by _SPI_begin_call(), AllocateDir(), AllocateFile(), be_lo_open(), CopyFrom(), CreateParallelContext(), CreatePortal(), ExecuteTruncateGuts(), InitTempTableNamespace(), MarkPortalActive(), OpenPipeStream(), OpenTransientFilePerm(), plpgsql_create_econtext(), plpgsql_inline_handler(), register_on_commit_action(), RelationAssumeNewRelfilelocator(), RelationBuildLocalRelation(), RelationForgetRelation(), remove_on_commit_action(), sepgsql_set_client_label(), SPI_connect_ext(), and spi_dest_startup().

◆ GetCurrentTransactionId()

TransactionId GetCurrentTransactionId ( void )

Definition at line 454 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    if (!FullTransactionIdIsValid(s->fullTransactionId))
        AssignTransactionId(s);
    return XidFromFullTransactionId(s->fullTransactionId);
}

References AssignTransactionId(), CurrentTransactionState, TransactionStateData::fullTransactionId, FullTransactionIdIsValid, and XidFromFullTransactionId.

Referenced by asyncQueueNotificationToEntry(), check_exclusion_or_unique_constraint(), ExecInsert(), heap_abort_speculative(), heap_delete(), heap_insert(), heap_lock_tuple(), heap_multi_insert(), heap_update(), LogAccessExclusiveLock(), LogAccessExclusiveLockPrepare(), logical_rewrite_log_mapping(), LogLogicalMessage(), PreCommit_Notify(), PrepareTransaction(), RelationSetNewRelfilenumber(), ReorderBufferProcessTXN(), and test_create_multixact().

◆ GetCurrentTransactionIdIfAny()

TransactionId GetCurrentTransactionIdIfAny ( void )

Definition at line 471 of file xact.c.

{
    return XidFromFullTransactionId(CurrentTransactionState->fullTransactionId);
}

References CurrentTransactionState, TransactionStateData::fullTransactionId, and XidFromFullTransactionId.

Referenced by IsSubxactTopXidLogPending(), RecordTransactionAbort(), ReorderBufferProcessTXN(), and XLogRecordAssemble().

◆ GetCurrentTransactionNestLevel()

int GetCurrentTransactionNestLevel ( void )

Definition at line 929 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    return s->nestingLevel;
}

References CurrentTransactionState, and TransactionStateData::nestingLevel.

Referenced by AddEnumLabel(), AfterTriggerBeginSubXact(), AfterTriggerEndSubXact(), AfterTriggerSetState(), Async_Notify(), AtEOSubXact_Inval(), AtSubAbort_Notify(), AtSubCommit_Notify(), AtSubCommit_smgr(), begin_remote_xact(), create_drop_transactional_internal(), CreatePortal(), ensure_tabstat_xact_level(), EnumValuesCreate(), pgfdw_subxact_callback(), pgstat_drop_relation(), PrepareInvalidationState(), PushActiveSnapshot(), queue_listen(), register_seq_scan(), RelationCreateStorage(), RelationDropStorage(), RelationMapUpdateMap(), RestoreReindexState(), SetReindexPending(), SetReindexProcessing(), smgrDoPendingDeletes(), smgrDoPendingSyncs(), and smgrGetPendingDeletes().

◆ GetCurrentTransactionStartTimestamp()

TimestampTz GetCurrentTransactionStartTimestamp ( void )

Definition at line 870 of file xact.c.

{
    return xactStartTimestamp;
}

References xactStartTimestamp.

Referenced by GetCurrentTimeUsec(), GetSQLCurrentTimestamp(), GetSQLLocalTimestamp(), InitializeParallelDSM(), now(), pg_timezone_abbrevs_abbrevs(), pg_timezone_abbrevs_zone(), and timetz_zone().

◆ GetCurrentTransactionStopTimestamp()

TimestampTz GetCurrentTransactionStopTimestamp ( void )

Definition at line 891 of file xact.c.

{
    TransactionState s PG_USED_FOR_ASSERTS_ONLY = CurrentTransactionState;
 
    /* should only be called after commit / abort processing */
    Assert(s->state == TRANS_DEFAULT ||
           s->state == TRANS_COMMIT ||
           s->state == TRANS_ABORT ||
           s->state == TRANS_PREPARE);
 
    if (xactStopTimestamp == 0)
        xactStopTimestamp = GetCurrentTimestamp();
 
    return xactStopTimestamp;
}

References Assert(), CurrentTransactionState, GetCurrentTimestamp(), PG_USED_FOR_ASSERTS_ONLY, TRANS_ABORT, TRANS_COMMIT, TRANS_DEFAULT, TRANS_PREPARE, and xactStopTimestamp.

Referenced by pgstat_relation_flush_cb(), pgstat_report_stat(), RecordTransactionAbort(), and RecordTransactionCommit().

◆ GetStableLatestTransactionId()

TransactionId GetStableLatestTransactionId ( void )

Definition at line 607 of file xact.c.

{
    static LocalTransactionId lxid = InvalidLocalTransactionId;
    static TransactionId stablexid = InvalidTransactionId;
 
    if (lxid != MyProc->vxid.lxid)
    {
        lxid = MyProc->vxid.lxid;
        stablexid = GetTopTransactionIdIfAny();
        if (!TransactionIdIsValid(stablexid))
            stablexid = ReadNextTransactionId();
    }
 
    Assert(TransactionIdIsValid(stablexid));
 
    return stablexid;
}

References Assert(), GetTopTransactionIdIfAny(), InvalidLocalTransactionId, InvalidTransactionId, PGPROC::lxid, MyProc, ReadNextTransactionId(), TransactionIdIsValid, and PGPROC::vxid.

Referenced by xid_age().

◆ GetTopFullTransactionId()

FullTransactionId GetTopFullTransactionId ( void )

Definition at line 483 of file xact.c.

{
    if (!FullTransactionIdIsValid(XactTopFullTransactionId))
        AssignTransactionId(&TopTransactionStateData);
    return XactTopFullTransactionId;
}

References AssignTransactionId(), FullTransactionIdIsValid, TopTransactionStateData, and XactTopFullTransactionId.

Referenced by pg_current_xact_id().

◆ GetTopFullTransactionIdIfAny()

FullTransactionId GetTopFullTransactionIdIfAny ( void )

Definition at line 499 of file xact.c.

{
    return XactTopFullTransactionId;
}

References XactTopFullTransactionId.

Referenced by pg_current_xact_id_if_assigned().

◆ GetTopTransactionId()

TransactionId GetTopTransactionId ( void )

Definition at line 426 of file xact.c.

{
    if (!FullTransactionIdIsValid(XactTopFullTransactionId))
        AssignTransactionId(&TopTransactionStateData);
    return XidFromFullTransactionId(XactTopFullTransactionId);
}

References AssignTransactionId(), FullTransactionIdIsValid, TopTransactionStateData, XactTopFullTransactionId, and XidFromFullTransactionId.

Referenced by AlterSequence(), AssignTransactionId(), consume_xids_common(), do_setval(), fill_seq_fork_with_data(), log_heap_new_cid(), nextval_internal(), and SequenceChangePersistence().

◆ GetTopTransactionIdIfAny()

TransactionId GetTopTransactionIdIfAny ( void )

Definition at line 441 of file xact.c.

{
    return XidFromFullTransactionId(XactTopFullTransactionId);
}

References XactTopFullTransactionId, and XidFromFullTransactionId.

Referenced by CheckForSerializableConflictOut(), ConditionalXactLockTableWait(), CreateInitDecodingContext(), ExportSnapshot(), GetSerializableTransactionSnapshotInt(), GetStableLatestTransactionId(), HeapCheckForSerializableConflictOut(), ImportSnapshot(), index_drop(), initSpGistState(), log_status_format(), RecordTransactionCommit(), TransactionIdIsCurrentTransactionId(), write_csvlog(), write_jsonlog(), XactLockTableWait(), XidIsConcurrent(), and XLogRecordAssemble().

◆ IsAbortedTransactionBlockState()

bool IsAbortedTransactionBlockState ( void )

Definition at line 407 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    if (s->blockState == TBLOCK_ABORT ||
        s->blockState == TBLOCK_SUBABORT)
        return true;
 
    return false;
}

References TransactionStateData::blockState, CurrentTransactionState, TBLOCK_ABORT, and TBLOCK_SUBABORT.

Referenced by BuildParamLogString(), exec_bind_message(), exec_describe_portal_message(), exec_describe_statement_message(), exec_execute_message(), exec_parse_message(), exec_replication_command(), exec_simple_query(), HandleFunctionRequest(), PostgresMain(), and ProcessRecoveryConflictInterrupt().

◆ IsInParallelMode()

bool IsInParallelMode ( void )

Definition at line 1089 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    return s->parallelModeLevel != 0 || s->parallelChildXact;
}

References CurrentTransactionState, TransactionStateData::parallelChildXact, and TransactionStateData::parallelModeLevel.

Referenced by AssignTransactionId(), CheckTargetForConflictsIn(), CommandCounterIncrement(), CreateParallelContext(), CreatePredicateLock(), DefineSavepoint(), DeleteChildTargetLocks(), ExecSetVariableStmt(), GetLatestSnapshot(), GetNewTransactionId(), GetSerializableTransactionSnapshotInt(), GetTransactionSnapshot(), heap_delete(), heap_update(), heap_vacuum_rel(), PrepareTransaction(), PreventCommandIfParallelMode(), RelationCreateStorage(), RelationMapUpdateMap(), ReleaseOneSerializableXact(), ReleasePredicateLocks(), ReleaseSavepoint(), RemoveReindexPending(), RollbackToSavepoint(), set_config_with_handle(), SetReindexPending(), standard_ExecutorStart(), standard_ProcessUtility(), systable_inplace_update_begin(), and UpdateActiveSnapshotCommandId().

◆ IsInTransactionBlock()

bool IsInTransactionBlock ( bool isTopLevel )

Definition at line 3769 of file xact.c.

{
    /*
     * Return true on same conditions that would make
     * PreventInTransactionBlock error out
     */
    if (IsTransactionBlock())
        return true;
 
    if (IsSubTransaction())
        return true;
 
    if (!isTopLevel)
        return true;
 
    if (CurrentTransactionState->blockState != TBLOCK_DEFAULT &&
        CurrentTransactionState->blockState != TBLOCK_STARTED)
        return true;
 
    return false;
}

References TransactionStateData::blockState, CurrentTransactionState, IsSubTransaction(), IsTransactionBlock(), TBLOCK_DEFAULT, and TBLOCK_STARTED.

Referenced by vacuum().

◆ IsSubTransaction()

bool IsSubTransaction ( void )

Definition at line 5044 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    if (s->nestingLevel >= 2)
        return true;
 
    return false;
}

References CurrentTransactionState, and TransactionStateData::nestingLevel.

Referenced by _SPI_commit(), _SPI_execute_plan(), _SPI_rollback(), AfterTriggerSetState(), check_transaction_deferrable(), check_transaction_isolation(), check_transaction_read_only(), CheckTargetForConflictsIn(), CheckTransactionBlock(), CreateReplicationSlot(), ExportSnapshot(), ImportSnapshot(), IsInTransactionBlock(), IsSubxactTopXidLogPending(), PreventInTransactionBlock(), ProcessRecoveryConflictInterrupt(), and SPI_inside_nonatomic_context().

◆ IsSubxactTopXidLogPending()

bool IsSubxactTopXidLogPending ( void )

Definition at line 559 of file xact.c.

{
    /* check whether it is already logged */
    if (CurrentTransactionState->topXidLogged)
        return false;
 
    /* wal_level has to be logical */
    if (!XLogLogicalInfoActive())
        return false;
 
    /* we need to be in a transaction state */
    if (!IsTransactionState())
        return false;
 
    /* it has to be a subtransaction */
    if (!IsSubTransaction())
        return false;
 
    /* the subtransaction has to have a XID assigned */
    if (!TransactionIdIsValid(GetCurrentTransactionIdIfAny()))
        return false;
 
    return true;
}

References CurrentTransactionState, GetCurrentTransactionIdIfAny(), IsSubTransaction(), IsTransactionState(), TransactionStateData::topXidLogged, TransactionIdIsValid, and XLogLogicalInfoActive.

Referenced by MarkSubxactTopXidLogged(), and XLogRecordAssemble().

◆ IsTransactionBlock()

bool IsTransactionBlock ( void )

Definition at line 4971 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    if (s->blockState == TBLOCK_DEFAULT || s->blockState == TBLOCK_STARTED)
        return false;
 
    return true;
}

References TransactionStateData::blockState, CurrentTransactionState, TBLOCK_DEFAULT, and TBLOCK_STARTED.

Referenced by apply_handle_commit_internal(), apply_handle_prepare_internal(), CheckTransactionBlock(), CreateReplicationSlot(), IsInTransactionBlock(), pa_start_subtrans(), pa_stream_abort(), PreventInTransactionBlock(), and standard_ProcessUtility().

◆ IsTransactionOrTransactionBlock()

bool IsTransactionOrTransactionBlock ( void )

Definition at line 4989 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    if (s->blockState == TBLOCK_DEFAULT)
        return false;
 
    return true;
}

References TransactionStateData::blockState, CurrentTransactionState, and TBLOCK_DEFAULT.

Referenced by apply_handle_stream_stop(), pgstat_report_stat(), PostgresMain(), ProcessCatchupInterrupt(), ProcessInterrupts(), ProcessNotifyInterrupt(), ProcessRecoveryConflictInterrupt(), ReorderBufferImmediateInvalidation(), ReorderBufferProcessTXN(), SnapBuildExportSnapshot(), StartupDecodingContext(), and WalSndErrorCleanup().

◆ IsTransactionState()

bool IsTransactionState ( void )

Definition at line 387 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    /*
     * TRANS_DEFAULT and TRANS_ABORT are obviously unsafe states.  However, we
     * also reject the startup/shutdown states TRANS_START, TRANS_COMMIT,
     * TRANS_PREPARE since it might be too soon or too late within those
     * transition states to do anything interesting.  Hence, the only "valid"
     * state is TRANS_INPROGRESS.
     */
    return (s->state == TRANS_INPROGRESS);
}

References CurrentTransactionState, TransactionStateData::state, and TRANS_INPROGRESS.

Referenced by AcceptInvalidationMessages(), apply_handle_commit_internal(), apply_handle_origin(), assign_transaction_timeout(), begin_replication_step(), check_client_encoding(), check_default_table_access_method(), check_default_tablespace(), check_default_text_search_config(), check_role(), check_session_authorization(), check_temp_tablespaces(), check_transaction_isolation(), check_transaction_read_only(), clear_subscription_skip_lsn(), ConditionalCatalogCacheInitializeCache(), CreateInitDecodingContext(), ensure_last_message(), FetchTableStates(), finish_sync_worker(), IsSubxactTopXidLogPending(), LogicalRepApplyLoop(), LogLogicalMessage(), maybe_reread_subscription(), pa_send_data(), pa_start_subtrans(), pg_do_encoding_conversion(), PrepareClientEncoding(), PrepareTempTablespaces(), process_syncing_tables_for_apply(), process_syncing_tables_for_sync(), RelationCacheInvalidate(), RelationFlushRelation(), RelationInitPhysicalAddr(), replorigin_create(), replorigin_drop_by_name(), SetMultiXactIdLimit(), SetTransactionIdLimit(), SnapBuildClearExportedSnapshot(), SocketBackend(), stream_stop_internal(), synchronize_slots(), and validate_remote_info().

◆ MarkCurrentTransactionIdLoggedIfAny()

void MarkCurrentTransactionIdLoggedIfAny ( void )

Definition at line 541 of file xact.c.

{
    if (FullTransactionIdIsValid(CurrentTransactionState->fullTransactionId))
        CurrentTransactionState->didLogXid = true;
}

References CurrentTransactionState, TransactionStateData::didLogXid, TransactionStateData::fullTransactionId, and FullTransactionIdIsValid.

Referenced by XLogInsertRecord().

◆ MarkSubxactTopXidLogged()

void MarkSubxactTopXidLogged ( void )

Definition at line 591 of file xact.c.

{
    Assert(IsSubxactTopXidLogPending());
 
    CurrentTransactionState->topXidLogged = true;
}

References Assert(), CurrentTransactionState, IsSubxactTopXidLogPending(), and TransactionStateData::topXidLogged.

Referenced by XLogInsertRecord().

◆ ParseAbortRecord()

void ParseAbortRecord	(	uint8	info,
		xl_xact_abort *	xlrec,
		xl_xact_parsed_abort *	parsed
	)

Definition at line 141 of file xactdesc.c.

{
    char       *data = ((char *) xlrec) + MinSizeOfXactAbort;
 
    memset(parsed, 0, sizeof(*parsed));
 
    parsed->xinfo = 0;          /* default, if no XLOG_XACT_HAS_INFO is
                                 * present */
 
    parsed->xact_time = xlrec->xact_time;
 
    if (info & XLOG_XACT_HAS_INFO)
    {
        xl_xact_xinfo *xl_xinfo = (xl_xact_xinfo *) data;
 
        parsed->xinfo = xl_xinfo->xinfo;
 
        data += sizeof(xl_xact_xinfo);
    }
 
    if (parsed->xinfo & XACT_XINFO_HAS_DBINFO)
    {
        xl_xact_dbinfo *xl_dbinfo = (xl_xact_dbinfo *) data;
 
        parsed->dbId = xl_dbinfo->dbId;
        parsed->tsId = xl_dbinfo->tsId;
 
        data += sizeof(xl_xact_dbinfo);
    }
 
    if (parsed->xinfo & XACT_XINFO_HAS_SUBXACTS)
    {
        xl_xact_subxacts *xl_subxacts = (xl_xact_subxacts *) data;
 
        parsed->nsubxacts = xl_subxacts->nsubxacts;
        parsed->subxacts = xl_subxacts->subxacts;
 
        data += MinSizeOfXactSubxacts;
        data += parsed->nsubxacts * sizeof(TransactionId);
    }
 
    if (parsed->xinfo & XACT_XINFO_HAS_RELFILELOCATORS)
    {
        xl_xact_relfilelocators *xl_rellocator = (xl_xact_relfilelocators *) data;
 
        parsed->nrels = xl_rellocator->nrels;
        parsed->xlocators = xl_rellocator->xlocators;
 
        data += MinSizeOfXactRelfileLocators;
        data += xl_rellocator->nrels * sizeof(RelFileLocator);
    }
 
    if (parsed->xinfo & XACT_XINFO_HAS_DROPPED_STATS)
    {
        xl_xact_stats_items *xl_drops = (xl_xact_stats_items *) data;
 
        parsed->nstats = xl_drops->nitems;
        parsed->stats = xl_drops->items;
 
        data += MinSizeOfXactStatsItems;
        data += xl_drops->nitems * sizeof(xl_xact_stats_item);
    }
 
    if (parsed->xinfo & XACT_XINFO_HAS_TWOPHASE)
    {
        xl_xact_twophase *xl_twophase = (xl_xact_twophase *) data;
 
        parsed->twophase_xid = xl_twophase->xid;
 
        data += sizeof(xl_xact_twophase);
 
        if (parsed->xinfo & XACT_XINFO_HAS_GID)
        {
            strlcpy(parsed->twophase_gid, data, sizeof(parsed->twophase_gid));
            data += strlen(data) + 1;
        }
    }
 
    /* Note: no alignment is guaranteed after this point */
 
    if (parsed->xinfo & XACT_XINFO_HAS_ORIGIN)
    {
        xl_xact_origin xl_origin;
 
        /* no alignment is guaranteed, so copy onto stack */
        memcpy(&xl_origin, data, sizeof(xl_origin));
 
        parsed->origin_lsn = xl_origin.origin_lsn;
        parsed->origin_timestamp = xl_origin.origin_timestamp;
 
        data += sizeof(xl_xact_origin);
    }
}

Referenced by recoveryStopsAfter(), recoveryStopsBefore(), SummarizeXactRecord(), xact_decode(), xact_desc_abort(), and xact_redo().

◆ ParseCommitRecord()

void ParseCommitRecord	(	uint8	info,
		xl_xact_commit *	xlrec,
		xl_xact_parsed_commit *	parsed
	)

Definition at line 35 of file xactdesc.c.

{
    char       *data = ((char *) xlrec) + MinSizeOfXactCommit;
 
    memset(parsed, 0, sizeof(*parsed));
 
    parsed->xinfo = 0;          /* default, if no XLOG_XACT_HAS_INFO is
                                 * present */
 
    parsed->xact_time = xlrec->xact_time;
 
    if (info & XLOG_XACT_HAS_INFO)
    {
        xl_xact_xinfo *xl_xinfo = (xl_xact_xinfo *) data;
 
        parsed->xinfo = xl_xinfo->xinfo;
 
        data += sizeof(xl_xact_xinfo);
    }
 
    if (parsed->xinfo & XACT_XINFO_HAS_DBINFO)
    {
        xl_xact_dbinfo *xl_dbinfo = (xl_xact_dbinfo *) data;
 
        parsed->dbId = xl_dbinfo->dbId;
        parsed->tsId = xl_dbinfo->tsId;
 
        data += sizeof(xl_xact_dbinfo);
    }
 
    if (parsed->xinfo & XACT_XINFO_HAS_SUBXACTS)
    {
        xl_xact_subxacts *xl_subxacts = (xl_xact_subxacts *) data;
 
        parsed->nsubxacts = xl_subxacts->nsubxacts;
        parsed->subxacts = xl_subxacts->subxacts;
 
        data += MinSizeOfXactSubxacts;
        data += parsed->nsubxacts * sizeof(TransactionId);
    }
 
    if (parsed->xinfo & XACT_XINFO_HAS_RELFILELOCATORS)
    {
        xl_xact_relfilelocators *xl_rellocators = (xl_xact_relfilelocators *) data;
 
        parsed->nrels = xl_rellocators->nrels;
        parsed->xlocators = xl_rellocators->xlocators;
 
        data += MinSizeOfXactRelfileLocators;
        data += xl_rellocators->nrels * sizeof(RelFileLocator);
    }
 
    if (parsed->xinfo & XACT_XINFO_HAS_DROPPED_STATS)
    {
        xl_xact_stats_items *xl_drops = (xl_xact_stats_items *) data;
 
        parsed->nstats = xl_drops->nitems;
        parsed->stats = xl_drops->items;
 
        data += MinSizeOfXactStatsItems;
        data += xl_drops->nitems * sizeof(xl_xact_stats_item);
    }
 
    if (parsed->xinfo & XACT_XINFO_HAS_INVALS)
    {
        xl_xact_invals *xl_invals = (xl_xact_invals *) data;
 
        parsed->nmsgs = xl_invals->nmsgs;
        parsed->msgs = xl_invals->msgs;
 
        data += MinSizeOfXactInvals;
        data += xl_invals->nmsgs * sizeof(SharedInvalidationMessage);
    }
 
    if (parsed->xinfo & XACT_XINFO_HAS_TWOPHASE)
    {
        xl_xact_twophase *xl_twophase = (xl_xact_twophase *) data;
 
        parsed->twophase_xid = xl_twophase->xid;
 
        data += sizeof(xl_xact_twophase);
 
        if (parsed->xinfo & XACT_XINFO_HAS_GID)
        {
            strlcpy(parsed->twophase_gid, data, sizeof(parsed->twophase_gid));
            data += strlen(data) + 1;
        }
    }
 
    /* Note: no alignment is guaranteed after this point */
 
    if (parsed->xinfo & XACT_XINFO_HAS_ORIGIN)
    {
        xl_xact_origin xl_origin;
 
        /* no alignment is guaranteed, so copy onto stack */
        memcpy(&xl_origin, data, sizeof(xl_origin));
 
        parsed->origin_lsn = xl_origin.origin_lsn;
        parsed->origin_timestamp = xl_origin.origin_timestamp;
 
        data += sizeof(xl_xact_origin);
    }
}

Referenced by recoveryStopsAfter(), recoveryStopsBefore(), SummarizeXactRecord(), xact_decode(), xact_desc_commit(), and xact_redo().

◆ ParsePrepareRecord()

void ParsePrepareRecord	(	uint8	info,
		xl_xact_prepare *	xlrec,
		xl_xact_parsed_prepare *	parsed
	)

Definition at line 239 of file xactdesc.c.

{
    char       *bufptr;
 
    bufptr = ((char *) xlrec) + MAXALIGN(sizeof(xl_xact_prepare));
 
    memset(parsed, 0, sizeof(*parsed));
 
    parsed->xact_time = xlrec->prepared_at;
    parsed->origin_lsn = xlrec->origin_lsn;
    parsed->origin_timestamp = xlrec->origin_timestamp;
    parsed->twophase_xid = xlrec->xid;
    parsed->dbId = xlrec->database;
    parsed->nsubxacts = xlrec->nsubxacts;
    parsed->nrels = xlrec->ncommitrels;
    parsed->nabortrels = xlrec->nabortrels;
    parsed->nstats = xlrec->ncommitstats;
    parsed->nabortstats = xlrec->nabortstats;
    parsed->nmsgs = xlrec->ninvalmsgs;
 
    strncpy(parsed->twophase_gid, bufptr, xlrec->gidlen);
    bufptr += MAXALIGN(xlrec->gidlen);
 
    parsed->subxacts = (TransactionId *) bufptr;
    bufptr += MAXALIGN(xlrec->nsubxacts * sizeof(TransactionId));
 
    parsed->xlocators = (RelFileLocator *) bufptr;
    bufptr += MAXALIGN(xlrec->ncommitrels * sizeof(RelFileLocator));
 
    parsed->abortlocators = (RelFileLocator *) bufptr;
    bufptr += MAXALIGN(xlrec->nabortrels * sizeof(RelFileLocator));
 
    parsed->stats = (xl_xact_stats_item *) bufptr;
    bufptr += MAXALIGN(xlrec->ncommitstats * sizeof(xl_xact_stats_item));
 
    parsed->abortstats = (xl_xact_stats_item *) bufptr;
    bufptr += MAXALIGN(xlrec->nabortstats * sizeof(xl_xact_stats_item));
 
    parsed->msgs = (SharedInvalidationMessage *) bufptr;
    bufptr += MAXALIGN(xlrec->ninvalmsgs * sizeof(SharedInvalidationMessage));
}

Referenced by xact_decode(), and xact_desc_prepare().

◆ PrepareTransactionBlock()

bool PrepareTransactionBlock ( const char * gid )

Definition at line 3992 of file xact.c.

{
    TransactionState s;
    bool        result;
 
    /* Set up to commit the current transaction */
    result = EndTransactionBlock(false);
 
    /* If successful, change outer tblock state to PREPARE */
    if (result)
    {
        s = CurrentTransactionState;
 
        while (s->parent != NULL)
            s = s->parent;
 
        if (s->blockState == TBLOCK_END)
        {
            /* Save GID where PrepareTransaction can find it again */
            prepareGID = MemoryContextStrdup(TopTransactionContext, gid);
 
            s->blockState = TBLOCK_PREPARE;
        }
        else
        {
            /*
             * ignore case where we are not in a transaction;
             * EndTransactionBlock already issued a warning.
             */
            Assert(s->blockState == TBLOCK_STARTED ||
                   s->blockState == TBLOCK_IMPLICIT_INPROGRESS);
            /* Don't send back a PREPARE result tag... */
            result = false;
        }
    }
 
    return result;
}

References Assert(), TransactionStateData::blockState, CurrentTransactionState, EndTransactionBlock(), MemoryContextStrdup(), TransactionStateData::parent, prepareGID, TBLOCK_END, TBLOCK_IMPLICIT_INPROGRESS, TBLOCK_PREPARE, TBLOCK_STARTED, and TopTransactionContext.

Referenced by apply_handle_prepare_internal(), and standard_ProcessUtility().

◆ PreventInTransactionBlock()

void PreventInTransactionBlock	(	bool	isTopLevel,
		const char *	stmtType
	)

Definition at line 3648 of file xact.c.

{
    /*
     * xact block already started?
     */
    if (IsTransactionBlock())
        ereport(ERROR,
                (errcode(ERRCODE_ACTIVE_SQL_TRANSACTION),
        /* translator: %s represents an SQL statement name */
                 errmsg("%s cannot run inside a transaction block",
                        stmtType)));
 
    /*
     * subtransaction?
     */
    if (IsSubTransaction())
        ereport(ERROR,
                (errcode(ERRCODE_ACTIVE_SQL_TRANSACTION),
        /* translator: %s represents an SQL statement name */
                 errmsg("%s cannot run inside a subtransaction",
                        stmtType)));
 
    /*
     * inside a function call?
     */
    if (!isTopLevel)
        ereport(ERROR,
                (errcode(ERRCODE_ACTIVE_SQL_TRANSACTION),
        /* translator: %s represents an SQL statement name */
                 errmsg("%s cannot be executed from a function", stmtType)));
 
    /* If we got past IsTransactionBlock test, should be in default state */
    if (CurrentTransactionState->blockState != TBLOCK_DEFAULT &&
        CurrentTransactionState->blockState != TBLOCK_STARTED)
        elog(FATAL, "cannot prevent transaction chain");
 
    /* All okay.  Set the flag to make sure the right thing happens later. */
    MyXactFlags |= XACT_FLAGS_NEEDIMMEDIATECOMMIT;
}

References TransactionStateData::blockState, CurrentTransactionState, elog, ereport, errcode(), errmsg(), ERROR, FATAL, IsSubTransaction(), IsTransactionBlock(), MyXactFlags, TBLOCK_DEFAULT, TBLOCK_STARTED, and XACT_FLAGS_NEEDIMMEDIATECOMMIT.

Referenced by AlterDatabase(), AlterSubscription(), CheckAlterSubOption(), cluster(), CreateSubscription(), DiscardAll(), DropSubscription(), exec_replication_command(), ExecDropStmt(), ExecReindex(), ProcessUtilitySlow(), ReindexPartitions(), standard_ProcessUtility(), and vacuum().

◆ RegisterSubXactCallback()

void RegisterSubXactCallback	(	SubXactCallback	callback,
		void *	arg
	)

Definition at line 3864 of file xact.c.

{
    SubXactCallbackItem *item;
 
    item = (SubXactCallbackItem *)
        MemoryContextAlloc(TopMemoryContext, sizeof(SubXactCallbackItem));
    item->callback = callback;
    item->arg = arg;
    item->next = SubXact_callbacks;
    SubXact_callbacks = item;
}

References SubXactCallbackItem::arg, arg, SubXactCallbackItem::callback, callback(), MemoryContextAlloc(), SubXactCallbackItem::next, SubXact_callbacks, and TopMemoryContext.

Referenced by _PG_init(), GetConnection(), and sepgsql_init_client_label().

◆ RegisterXactCallback()

void RegisterXactCallback	(	XactCallback	callback,
		void *	arg
	)

Definition at line 3804 of file xact.c.

{
    XactCallbackItem *item;
 
    item = (XactCallbackItem *)
        MemoryContextAlloc(TopMemoryContext, sizeof(XactCallbackItem));
    item->callback = callback;
    item->arg = arg;
    item->next = Xact_callbacks;
    Xact_callbacks = item;
}

References XactCallbackItem::arg, arg, XactCallbackItem::callback, callback(), MemoryContextAlloc(), XactCallbackItem::next, TopMemoryContext, and Xact_callbacks.

Referenced by _PG_init(), GetConnection(), and sepgsql_init_client_label().

◆ ReleaseCurrentSubTransaction()

void ReleaseCurrentSubTransaction ( void )

Definition at line 4768 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    /*
     * We do not check for parallel mode here.  It's permissible to start and
     * end "internal" subtransactions while in parallel mode, so long as no
     * new XIDs or command IDs are assigned.
     */
 
    if (s->blockState != TBLOCK_SUBINPROGRESS)
        elog(ERROR, "ReleaseCurrentSubTransaction: unexpected state %s",
             BlockStateAsString(s->blockState));
    Assert(s->state == TRANS_INPROGRESS);
    MemoryContextSwitchTo(CurTransactionContext);
    CommitSubTransaction();
    s = CurrentTransactionState;    /* changed by pop */
    Assert(s->state == TRANS_INPROGRESS);
}

References Assert(), TransactionStateData::blockState, BlockStateAsString(), CommitSubTransaction(), CurrentTransactionState, CurTransactionContext, elog, ERROR, MemoryContextSwitchTo(), TransactionStateData::state, TBLOCK_SUBINPROGRESS, and TRANS_INPROGRESS.

Referenced by exec_stmt_block(), plperl_spi_exec(), plperl_spi_exec_prepared(), plperl_spi_fetchrow(), plperl_spi_prepare(), plperl_spi_query(), plperl_spi_query_prepared(), pltcl_subtrans_commit(), pltcl_subtransaction(), PLy_spi_subtransaction_commit(), and PLy_subtransaction_exit().

◆ ReleaseSavepoint()

void ReleaseSavepoint ( const char * name )

Definition at line 4458 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
    TransactionState target,
                xact;
 
    /*
     * Workers synchronize transaction state at the beginning of each parallel
     * operation, so we can't account for transaction state change after that
     * point.  (Note that this check will certainly error out if s->blockState
     * is TBLOCK_PARALLEL_INPROGRESS, so we can treat that as an invalid case
     * below.)
     */
    if (IsInParallelMode() || IsParallelWorker())
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_TRANSACTION_STATE),
                 errmsg("cannot release savepoints during a parallel operation")));
 
    switch (s->blockState)
    {
            /*
             * We can't release a savepoint if there is no savepoint defined.
             */
        case TBLOCK_INPROGRESS:
            ereport(ERROR,
                    (errcode(ERRCODE_S_E_INVALID_SPECIFICATION),
                     errmsg("savepoint \"%s\" does not exist", name)));
            break;
 
        case TBLOCK_IMPLICIT_INPROGRESS:
            /* See comment about implicit transactions in DefineSavepoint */
            ereport(ERROR,
                    (errcode(ERRCODE_NO_ACTIVE_SQL_TRANSACTION),
            /* translator: %s represents an SQL statement name */
                     errmsg("%s can only be used in transaction blocks",
                            "RELEASE SAVEPOINT")));
            break;
 
            /*
             * We are in a non-aborted subtransaction.  This is the only valid
             * case.
             */
        case TBLOCK_SUBINPROGRESS:
            break;
 
            /* These cases are invalid. */
        case TBLOCK_DEFAULT:
        case TBLOCK_STARTED:
        case TBLOCK_BEGIN:
        case TBLOCK_PARALLEL_INPROGRESS:
        case TBLOCK_SUBBEGIN:
        case TBLOCK_END:
        case TBLOCK_SUBRELEASE:
        case TBLOCK_SUBCOMMIT:
        case TBLOCK_ABORT:
        case TBLOCK_SUBABORT:
        case TBLOCK_ABORT_END:
        case TBLOCK_SUBABORT_END:
        case TBLOCK_ABORT_PENDING:
        case TBLOCK_SUBABORT_PENDING:
        case TBLOCK_SUBRESTART:
        case TBLOCK_SUBABORT_RESTART:
        case TBLOCK_PREPARE:
            elog(FATAL, "ReleaseSavepoint: unexpected state %s",
                 BlockStateAsString(s->blockState));
            break;
    }
 
    for (target = s; PointerIsValid(target); target = target->parent)
    {
        if (PointerIsValid(target->name) && strcmp(target->name, name) == 0)
            break;
    }
 
    if (!PointerIsValid(target))
        ereport(ERROR,
                (errcode(ERRCODE_S_E_INVALID_SPECIFICATION),
                 errmsg("savepoint \"%s\" does not exist", name)));
 
    /* disallow crossing savepoint level boundaries */
    if (target->savepointLevel != s->savepointLevel)
        ereport(ERROR,
                (errcode(ERRCODE_S_E_INVALID_SPECIFICATION),
                 errmsg("savepoint \"%s\" does not exist within current savepoint level", name)));
 
    /*
     * Mark "commit pending" all subtransactions up to the target
     * subtransaction.  The actual commits will happen when control gets to
     * CommitTransactionCommand.
     */
    xact = CurrentTransactionState;
    for (;;)
    {
        Assert(xact->blockState == TBLOCK_SUBINPROGRESS);
        xact->blockState = TBLOCK_SUBRELEASE;
        if (xact == target)
            break;
        xact = xact->parent;
        Assert(PointerIsValid(xact));
    }
}

References Assert(), TransactionStateData::blockState, BlockStateAsString(), CurrentTransactionState, elog, ereport, errcode(), errmsg(), ERROR, FATAL, IsInParallelMode(), IsParallelWorker, TransactionStateData::name, name, TransactionStateData::parent, PointerIsValid, TransactionStateData::savepointLevel, TBLOCK_ABORT, TBLOCK_ABORT_END, TBLOCK_ABORT_PENDING, TBLOCK_BEGIN, TBLOCK_DEFAULT, TBLOCK_END, TBLOCK_IMPLICIT_INPROGRESS, TBLOCK_INPROGRESS, TBLOCK_PARALLEL_INPROGRESS, TBLOCK_PREPARE, TBLOCK_STARTED, TBLOCK_SUBABORT, TBLOCK_SUBABORT_END, TBLOCK_SUBABORT_PENDING, TBLOCK_SUBABORT_RESTART, TBLOCK_SUBBEGIN, TBLOCK_SUBCOMMIT, TBLOCK_SUBINPROGRESS, TBLOCK_SUBRELEASE, and TBLOCK_SUBRESTART.

Referenced by standard_ProcessUtility().

◆ RequireTransactionBlock()

void RequireTransactionBlock	(	bool	isTopLevel,
		const char *	stmtType
	)

Definition at line 3716 of file xact.c.

{
    CheckTransactionBlock(isTopLevel, true, stmtType);
}

References CheckTransactionBlock().

Referenced by PerformCursorOpen(), and standard_ProcessUtility().

◆ RestoreTransactionCharacteristics()

void RestoreTransactionCharacteristics ( const SavedTransactionCharacteristics * s )

Definition at line 3144 of file xact.c.

{
    XactIsoLevel = s->save_XactIsoLevel;
    XactReadOnly = s->save_XactReadOnly;
    XactDeferrable = s->save_XactDeferrable;
}

References SavedTransactionCharacteristics::save_XactDeferrable, SavedTransactionCharacteristics::save_XactIsoLevel, SavedTransactionCharacteristics::save_XactReadOnly, XactDeferrable, XactIsoLevel, and XactReadOnly.

Referenced by _SPI_commit(), _SPI_rollback(), and CommitTransactionCommandInternal().

◆ RollbackAndReleaseCurrentSubTransaction()

void RollbackAndReleaseCurrentSubTransaction ( void )

Definition at line 4796 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    /*
     * We do not check for parallel mode here.  It's permissible to start and
     * end "internal" subtransactions while in parallel mode, so long as no
     * new XIDs or command IDs are assigned.
     */
 
    switch (s->blockState)
    {
            /* Must be in a subtransaction */
        case TBLOCK_SUBINPROGRESS:
        case TBLOCK_SUBABORT:
            break;
 
            /* These cases are invalid. */
        case TBLOCK_DEFAULT:
        case TBLOCK_STARTED:
        case TBLOCK_BEGIN:
        case TBLOCK_IMPLICIT_INPROGRESS:
        case TBLOCK_PARALLEL_INPROGRESS:
        case TBLOCK_SUBBEGIN:
        case TBLOCK_INPROGRESS:
        case TBLOCK_END:
        case TBLOCK_SUBRELEASE:
        case TBLOCK_SUBCOMMIT:
        case TBLOCK_ABORT:
        case TBLOCK_ABORT_END:
        case TBLOCK_SUBABORT_END:
        case TBLOCK_ABORT_PENDING:
        case TBLOCK_SUBABORT_PENDING:
        case TBLOCK_SUBRESTART:
        case TBLOCK_SUBABORT_RESTART:
        case TBLOCK_PREPARE:
            elog(FATAL, "RollbackAndReleaseCurrentSubTransaction: unexpected state %s",
                 BlockStateAsString(s->blockState));
            break;
    }
 
    /*
     * Abort the current subtransaction, if needed.
     */
    if (s->blockState == TBLOCK_SUBINPROGRESS)
        AbortSubTransaction();
 
    /* And clean it up, too */
    CleanupSubTransaction();
 
    s = CurrentTransactionState;    /* changed by pop */
    Assert(s->blockState == TBLOCK_SUBINPROGRESS ||
           s->blockState == TBLOCK_INPROGRESS ||
           s->blockState == TBLOCK_IMPLICIT_INPROGRESS ||
           s->blockState == TBLOCK_PARALLEL_INPROGRESS ||
           s->blockState == TBLOCK_STARTED);
}

References AbortSubTransaction(), Assert(), TransactionStateData::blockState, BlockStateAsString(), CleanupSubTransaction(), CurrentTransactionState, elog, FATAL, TBLOCK_ABORT, TBLOCK_ABORT_END, TBLOCK_ABORT_PENDING, TBLOCK_BEGIN, TBLOCK_DEFAULT, TBLOCK_END, TBLOCK_IMPLICIT_INPROGRESS, TBLOCK_INPROGRESS, TBLOCK_PARALLEL_INPROGRESS, TBLOCK_PREPARE, TBLOCK_STARTED, TBLOCK_SUBABORT, TBLOCK_SUBABORT_END, TBLOCK_SUBABORT_PENDING, TBLOCK_SUBABORT_RESTART, TBLOCK_SUBBEGIN, TBLOCK_SUBCOMMIT, TBLOCK_SUBINPROGRESS, TBLOCK_SUBRELEASE, and TBLOCK_SUBRESTART.

Referenced by exec_stmt_block(), plperl_spi_exec(), plperl_spi_exec_prepared(), plperl_spi_fetchrow(), plperl_spi_prepare(), plperl_spi_query(), plperl_spi_query_prepared(), pltcl_subtrans_abort(), pltcl_subtransaction(), PLy_abort_open_subtransactions(), PLy_spi_subtransaction_abort(), PLy_subtransaction_exit(), ReorderBufferImmediateInvalidation(), and ReorderBufferProcessTXN().

◆ RollbackToSavepoint()

void RollbackToSavepoint ( const char * name )

Definition at line 4567 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
    TransactionState target,
                xact;
 
    /*
     * Workers synchronize transaction state at the beginning of each parallel
     * operation, so we can't account for transaction state change after that
     * point.  (Note that this check will certainly error out if s->blockState
     * is TBLOCK_PARALLEL_INPROGRESS, so we can treat that as an invalid case
     * below.)
     */
    if (IsInParallelMode() || IsParallelWorker())
        ereport(ERROR,
                (errcode(ERRCODE_INVALID_TRANSACTION_STATE),
                 errmsg("cannot rollback to savepoints during a parallel operation")));
 
    switch (s->blockState)
    {
            /*
             * We can't rollback to a savepoint if there is no savepoint
             * defined.
             */
        case TBLOCK_INPROGRESS:
        case TBLOCK_ABORT:
            ereport(ERROR,
                    (errcode(ERRCODE_S_E_INVALID_SPECIFICATION),
                     errmsg("savepoint \"%s\" does not exist", name)));
            break;
 
        case TBLOCK_IMPLICIT_INPROGRESS:
            /* See comment about implicit transactions in DefineSavepoint */
            ereport(ERROR,
                    (errcode(ERRCODE_NO_ACTIVE_SQL_TRANSACTION),
            /* translator: %s represents an SQL statement name */
                     errmsg("%s can only be used in transaction blocks",
                            "ROLLBACK TO SAVEPOINT")));
            break;
 
            /*
             * There is at least one savepoint, so proceed.
             */
        case TBLOCK_SUBINPROGRESS:
        case TBLOCK_SUBABORT:
            break;
 
            /* These cases are invalid. */
        case TBLOCK_DEFAULT:
        case TBLOCK_STARTED:
        case TBLOCK_BEGIN:
        case TBLOCK_PARALLEL_INPROGRESS:
        case TBLOCK_SUBBEGIN:
        case TBLOCK_END:
        case TBLOCK_SUBRELEASE:
        case TBLOCK_SUBCOMMIT:
        case TBLOCK_ABORT_END:
        case TBLOCK_SUBABORT_END:
        case TBLOCK_ABORT_PENDING:
        case TBLOCK_SUBABORT_PENDING:
        case TBLOCK_SUBRESTART:
        case TBLOCK_SUBABORT_RESTART:
        case TBLOCK_PREPARE:
            elog(FATAL, "RollbackToSavepoint: unexpected state %s",
                 BlockStateAsString(s->blockState));
            break;
    }
 
    for (target = s; PointerIsValid(target); target = target->parent)
    {
        if (PointerIsValid(target->name) && strcmp(target->name, name) == 0)
            break;
    }
 
    if (!PointerIsValid(target))
        ereport(ERROR,
                (errcode(ERRCODE_S_E_INVALID_SPECIFICATION),
                 errmsg("savepoint \"%s\" does not exist", name)));
 
    /* disallow crossing savepoint level boundaries */
    if (target->savepointLevel != s->savepointLevel)
        ereport(ERROR,
                (errcode(ERRCODE_S_E_INVALID_SPECIFICATION),
                 errmsg("savepoint \"%s\" does not exist within current savepoint level", name)));
 
    /*
     * Mark "abort pending" all subtransactions up to the target
     * subtransaction.  The actual aborts will happen when control gets to
     * CommitTransactionCommand.
     */
    xact = CurrentTransactionState;
    for (;;)
    {
        if (xact == target)
            break;
        if (xact->blockState == TBLOCK_SUBINPROGRESS)
            xact->blockState = TBLOCK_SUBABORT_PENDING;
        else if (xact->blockState == TBLOCK_SUBABORT)
            xact->blockState = TBLOCK_SUBABORT_END;
        else
            elog(FATAL, "RollbackToSavepoint: unexpected state %s",
                 BlockStateAsString(xact->blockState));
        xact = xact->parent;
        Assert(PointerIsValid(xact));
    }
 
    /* And mark the target as "restart pending" */
    if (xact->blockState == TBLOCK_SUBINPROGRESS)
        xact->blockState = TBLOCK_SUBRESTART;
    else if (xact->blockState == TBLOCK_SUBABORT)
        xact->blockState = TBLOCK_SUBABORT_RESTART;
    else
        elog(FATAL, "RollbackToSavepoint: unexpected state %s",
             BlockStateAsString(xact->blockState));
}

References Assert(), TransactionStateData::blockState, BlockStateAsString(), CurrentTransactionState, elog, ereport, errcode(), errmsg(), ERROR, FATAL, IsInParallelMode(), IsParallelWorker, TransactionStateData::name, name, TransactionStateData::parent, PointerIsValid, TransactionStateData::savepointLevel, TBLOCK_ABORT, TBLOCK_ABORT_END, TBLOCK_ABORT_PENDING, TBLOCK_BEGIN, TBLOCK_DEFAULT, TBLOCK_END, TBLOCK_IMPLICIT_INPROGRESS, TBLOCK_INPROGRESS, TBLOCK_PARALLEL_INPROGRESS, TBLOCK_PREPARE, TBLOCK_STARTED, TBLOCK_SUBABORT, TBLOCK_SUBABORT_END, TBLOCK_SUBABORT_PENDING, TBLOCK_SUBABORT_RESTART, TBLOCK_SUBBEGIN, TBLOCK_SUBCOMMIT, TBLOCK_SUBINPROGRESS, TBLOCK_SUBRELEASE, and TBLOCK_SUBRESTART.

Referenced by pa_stream_abort(), and standard_ProcessUtility().

◆ SaveTransactionCharacteristics()

void SaveTransactionCharacteristics ( SavedTransactionCharacteristics * s )

Definition at line 3136 of file xact.c.

{
    s->save_XactIsoLevel = XactIsoLevel;
    s->save_XactReadOnly = XactReadOnly;
    s->save_XactDeferrable = XactDeferrable;
}

References SavedTransactionCharacteristics::save_XactDeferrable, SavedTransactionCharacteristics::save_XactIsoLevel, SavedTransactionCharacteristics::save_XactReadOnly, XactDeferrable, XactIsoLevel, and XactReadOnly.

Referenced by _SPI_commit(), _SPI_rollback(), and CommitTransactionCommandInternal().

◆ SerializeTransactionState()

void SerializeTransactionState	(	Size	maxsize,
		char *	start_address
	)

Definition at line 5540 of file xact.c.

{
    TransactionState s;
    Size        nxids = 0;
    Size        i = 0;
    TransactionId *workspace;
    SerializedTransactionState *result;
 
    result = (SerializedTransactionState *) start_address;
 
    result->xactIsoLevel = XactIsoLevel;
    result->xactDeferrable = XactDeferrable;
    result->topFullTransactionId = XactTopFullTransactionId;
    result->currentFullTransactionId =
        CurrentTransactionState->fullTransactionId;
    result->currentCommandId = currentCommandId;
 
    /*
     * If we're running in a parallel worker and launching a parallel worker
     * of our own, we can just pass along the information that was passed to
     * us.
     */
    if (nParallelCurrentXids > 0)
    {
        result->nParallelCurrentXids = nParallelCurrentXids;
        memcpy(&result->parallelCurrentXids[0], ParallelCurrentXids,
               nParallelCurrentXids * sizeof(TransactionId));
        return;
    }
 
    /*
     * OK, we need to generate a sorted list of XIDs that our workers should
     * view as current.  First, figure out how many there are.
     */
    for (s = CurrentTransactionState; s != NULL; s = s->parent)
    {
        if (FullTransactionIdIsValid(s->fullTransactionId))
            nxids = add_size(nxids, 1);
        nxids = add_size(nxids, s->nChildXids);
    }
    Assert(SerializedTransactionStateHeaderSize + nxids * sizeof(TransactionId)
           <= maxsize);
 
    /* Copy them to our scratch space. */
    workspace = palloc(nxids * sizeof(TransactionId));
    for (s = CurrentTransactionState; s != NULL; s = s->parent)
    {
        if (FullTransactionIdIsValid(s->fullTransactionId))
            workspace[i++] = XidFromFullTransactionId(s->fullTransactionId);
        if (s->nChildXids > 0)
            memcpy(&workspace[i], s->childXids,
                   s->nChildXids * sizeof(TransactionId));
        i += s->nChildXids;
    }
    Assert(i == nxids);
 
    /* Sort them. */
    qsort(workspace, nxids, sizeof(TransactionId), xidComparator);
 
    /* Copy data into output area. */
    result->nParallelCurrentXids = nxids;
    memcpy(&result->parallelCurrentXids[0], workspace,
           nxids * sizeof(TransactionId));
}

Referenced by InitializeParallelDSM().

◆ SetCurrentStatementStartTimestamp()

void SetCurrentStatementStartTimestamp ( void )

Definition at line 914 of file xact.c.

{
    if (!IsParallelWorker())
        stmtStartTimestamp = GetCurrentTimestamp();
    else
        Assert(stmtStartTimestamp != 0);
}

References Assert(), GetCurrentTimestamp(), IsParallelWorker, and stmtStartTimestamp.

Referenced by autovac_report_activity(), autovac_report_workitem(), begin_replication_step(), initialize_worker_spi(), InitPostgres(), PostgresMain(), and worker_spi_main().

◆ SetParallelStartTimestamps()

void SetParallelStartTimestamps	(	TimestampTz	xact_ts,
		TimestampTz	stmt_ts
	)

Definition at line 859 of file xact.c.

{
    Assert(IsParallelWorker());
    xactStartTimestamp = xact_ts;
    stmtStartTimestamp = stmt_ts;
}

References Assert(), IsParallelWorker, stmtStartTimestamp, and xactStartTimestamp.

Referenced by ParallelWorkerMain().

◆ StartParallelWorkerTransaction()

void StartParallelWorkerTransaction ( char * tstatespace )

Definition at line 5611 of file xact.c.

{
    SerializedTransactionState *tstate;
 
    Assert(CurrentTransactionState->blockState == TBLOCK_DEFAULT);
    StartTransaction();
 
    tstate = (SerializedTransactionState *) tstatespace;
    XactIsoLevel = tstate->xactIsoLevel;
    XactDeferrable = tstate->xactDeferrable;
    XactTopFullTransactionId = tstate->topFullTransactionId;
    CurrentTransactionState->fullTransactionId =
        tstate->currentFullTransactionId;
    currentCommandId = tstate->currentCommandId;
    nParallelCurrentXids = tstate->nParallelCurrentXids;
    ParallelCurrentXids = &tstate->parallelCurrentXids[0];
 
    CurrentTransactionState->blockState = TBLOCK_PARALLEL_INPROGRESS;
}

References Assert(), TransactionStateData::blockState, SerializedTransactionState::currentCommandId, currentCommandId, SerializedTransactionState::currentFullTransactionId, CurrentTransactionState, TransactionStateData::fullTransactionId, nParallelCurrentXids, SerializedTransactionState::nParallelCurrentXids, ParallelCurrentXids, SerializedTransactionState::parallelCurrentXids, StartTransaction(), TBLOCK_DEFAULT, TBLOCK_PARALLEL_INPROGRESS, SerializedTransactionState::topFullTransactionId, XactDeferrable, SerializedTransactionState::xactDeferrable, XactIsoLevel, SerializedTransactionState::xactIsoLevel, and XactTopFullTransactionId.

Referenced by ParallelWorkerMain().

◆ StartTransactionCommand()

void StartTransactionCommand ( void )

Definition at line 3059 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    switch (s->blockState)
    {
            /*
             * if we aren't in a transaction block, we just do our usual start
             * transaction.
             */
        case TBLOCK_DEFAULT:
            StartTransaction();
            s->blockState = TBLOCK_STARTED;
            break;
 
            /*
             * We are somewhere in a transaction block or subtransaction and
             * about to start a new command.  For now we do nothing, but
             * someday we may do command-local resource initialization. (Note
             * that any needed CommandCounterIncrement was done by the
             * previous CommitTransactionCommand.)
             */
        case TBLOCK_INPROGRESS:
        case TBLOCK_IMPLICIT_INPROGRESS:
        case TBLOCK_SUBINPROGRESS:
            break;
 
            /*
             * Here we are in a failed transaction block (one of the commands
             * caused an abort) so we do nothing but remain in the abort
             * state.  Eventually we will get a ROLLBACK command which will
             * get us out of this state.  (It is up to other code to ensure
             * that no commands other than ROLLBACK will be processed in these
             * states.)
             */
        case TBLOCK_ABORT:
        case TBLOCK_SUBABORT:
            break;
 
            /* These cases are invalid. */
        case TBLOCK_STARTED:
        case TBLOCK_BEGIN:
        case TBLOCK_PARALLEL_INPROGRESS:
        case TBLOCK_SUBBEGIN:
        case TBLOCK_END:
        case TBLOCK_SUBRELEASE:
        case TBLOCK_SUBCOMMIT:
        case TBLOCK_ABORT_END:
        case TBLOCK_SUBABORT_END:
        case TBLOCK_ABORT_PENDING:
        case TBLOCK_SUBABORT_PENDING:
        case TBLOCK_SUBRESTART:
        case TBLOCK_SUBABORT_RESTART:
        case TBLOCK_PREPARE:
            elog(ERROR, "StartTransactionCommand: unexpected state %s",
                 BlockStateAsString(s->blockState));
            break;
    }
 
    /*
     * We must switch to CurTransactionContext before returning. This is
     * already done if we called StartTransaction, otherwise not.
     */
    Assert(CurTransactionContext != NULL);
    MemoryContextSwitchTo(CurTransactionContext);
}

References Assert(), TransactionStateData::blockState, BlockStateAsString(), CurrentTransactionState, CurTransactionContext, elog, ERROR, MemoryContextSwitchTo(), StartTransaction(), TBLOCK_ABORT, TBLOCK_ABORT_END, TBLOCK_ABORT_PENDING, TBLOCK_BEGIN, TBLOCK_DEFAULT, TBLOCK_END, TBLOCK_IMPLICIT_INPROGRESS, TBLOCK_INPROGRESS, TBLOCK_PARALLEL_INPROGRESS, TBLOCK_PREPARE, TBLOCK_STARTED, TBLOCK_SUBABORT, TBLOCK_SUBABORT_END, TBLOCK_SUBABORT_PENDING, TBLOCK_SUBABORT_RESTART, TBLOCK_SUBBEGIN, TBLOCK_SUBCOMMIT, TBLOCK_SUBINPROGRESS, TBLOCK_SUBRELEASE, and TBLOCK_SUBRESTART.

Referenced by _SPI_commit(), _SPI_rollback(), apply_handle_commit_internal(), ATExecDetachPartition(), autoprewarm_database_main(), bbsink_server_new(), begin_replication_step(), BeginInternalSubTransaction(), BootstrapModeMain(), clear_subscription_skip_lsn(), cluster(), cluster_multiple_rels(), DefineIndex(), DisableSubscriptionAndExit(), do_autovacuum(), EventTriggerOnLogin(), exec_replication_command(), FetchTableStates(), finish_sync_worker(), get_database_list(), get_subscription_list(), IdentifySystem(), index_drop(), initialize_worker_spi(), InitializeLogRepWorker(), InitPostgres(), LogicalRepSyncTableStart(), maybe_reread_subscription(), movedb(), pa_start_subtrans(), ParallelApplyWorkerMain(), ParallelWorkerMain(), perform_work_item(), process_syncing_tables_for_apply(), process_syncing_tables_for_sync(), ProcessCatchupInterrupt(), ProcessIncomingNotify(), ReindexMultipleInternal(), ReindexRelationConcurrently(), RemoveTempRelationsCallback(), ReorderBufferProcessTXN(), run_apply_worker(), shell_check_detail(), SnapBuildExportSnapshot(), start_xact_command(), synchronize_slots(), vacuum(), vacuum_rel(), validate_remote_info(), and worker_spi_main().

◆ SubTransactionIsActive()

bool SubTransactionIsActive ( SubTransactionId subxid )

Definition at line 805 of file xact.c.

{
    TransactionState s;
 
    for (s = CurrentTransactionState; s != NULL; s = s->parent)
    {
        if (s->state == TRANS_ABORT)
            continue;
        if (s->subTransactionId == subxid)
            return true;
    }
    return false;
}

References CurrentTransactionState, TransactionStateData::parent, TransactionStateData::state, TransactionStateData::subTransactionId, and TRANS_ABORT.

◆ TransactionBlockStatusCode()

char TransactionBlockStatusCode ( void )

Definition at line 5003 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    switch (s->blockState)
    {
        case TBLOCK_DEFAULT:
        case TBLOCK_STARTED:
            return 'I';         /* idle --- not in transaction */
        case TBLOCK_BEGIN:
        case TBLOCK_SUBBEGIN:
        case TBLOCK_INPROGRESS:
        case TBLOCK_IMPLICIT_INPROGRESS:
        case TBLOCK_PARALLEL_INPROGRESS:
        case TBLOCK_SUBINPROGRESS:
        case TBLOCK_END:
        case TBLOCK_SUBRELEASE:
        case TBLOCK_SUBCOMMIT:
        case TBLOCK_PREPARE:
            return 'T';         /* in transaction */
        case TBLOCK_ABORT:
        case TBLOCK_SUBABORT:
        case TBLOCK_ABORT_END:
        case TBLOCK_SUBABORT_END:
        case TBLOCK_ABORT_PENDING:
        case TBLOCK_SUBABORT_PENDING:
        case TBLOCK_SUBRESTART:
        case TBLOCK_SUBABORT_RESTART:
            return 'E';         /* in failed transaction */
    }
 
    /* should never get here */
    elog(FATAL, "invalid transaction block state: %s",
         BlockStateAsString(s->blockState));
    return 0;                   /* keep compiler quiet */
}

References TransactionStateData::blockState, BlockStateAsString(), CurrentTransactionState, elog, FATAL, TBLOCK_ABORT, TBLOCK_ABORT_END, TBLOCK_ABORT_PENDING, TBLOCK_BEGIN, TBLOCK_DEFAULT, TBLOCK_END, TBLOCK_IMPLICIT_INPROGRESS, TBLOCK_INPROGRESS, TBLOCK_PARALLEL_INPROGRESS, TBLOCK_PREPARE, TBLOCK_STARTED, TBLOCK_SUBABORT, TBLOCK_SUBABORT_END, TBLOCK_SUBABORT_PENDING, TBLOCK_SUBABORT_RESTART, TBLOCK_SUBBEGIN, TBLOCK_SUBCOMMIT, TBLOCK_SUBINPROGRESS, TBLOCK_SUBRELEASE, and TBLOCK_SUBRESTART.

Referenced by ReadyForQuery().

◆ TransactionIdIsCurrentTransactionId()

bool TransactionIdIsCurrentTransactionId ( TransactionId xid )

Definition at line 941 of file xact.c.

{
    TransactionState s;
 
    /*
     * We always say that BootstrapTransactionId is "not my transaction ID"
     * even when it is (ie, during bootstrap).  Along with the fact that
     * transam.c always treats BootstrapTransactionId as already committed,
     * this causes the heapam_visibility.c routines to see all tuples as
     * committed, which is what we need during bootstrap.  (Bootstrap mode
     * only inserts tuples, it never updates or deletes them, so all tuples
     * can be presumed good immediately.)
     *
     * Likewise, InvalidTransactionId and FrozenTransactionId are certainly
     * not my transaction ID, so we can just return "false" immediately for
     * any non-normal XID.
     */
    if (!TransactionIdIsNormal(xid))
        return false;
 
    if (TransactionIdEquals(xid, GetTopTransactionIdIfAny()))
        return true;
 
    /*
     * In parallel workers, the XIDs we must consider as current are stored in
     * ParallelCurrentXids rather than the transaction-state stack.  Note that
     * the XIDs in this array are sorted numerically rather than according to
     * transactionIdPrecedes order.
     */
    if (nParallelCurrentXids > 0)
    {
        int         low,
                    high;
 
        low = 0;
        high = nParallelCurrentXids - 1;
        while (low <= high)
        {
            int         middle;
            TransactionId probe;
 
            middle = low + (high - low) / 2;
            probe = ParallelCurrentXids[middle];
            if (probe == xid)
                return true;
            else if (probe < xid)
                low = middle + 1;
            else
                high = middle - 1;
        }
        return false;
    }
 
    /*
     * We will return true for the Xid of the current subtransaction, any of
     * its subcommitted children, any of its parents, or any of their
     * previously subcommitted children.  However, a transaction being aborted
     * is no longer "current", even though it may still have an entry on the
     * state stack.
     */
    for (s = CurrentTransactionState; s != NULL; s = s->parent)
    {
        int         low,
                    high;
 
        if (s->state == TRANS_ABORT)
            continue;
        if (!FullTransactionIdIsValid(s->fullTransactionId))
            continue;           /* it can't have any child XIDs either */
        if (TransactionIdEquals(xid, XidFromFullTransactionId(s->fullTransactionId)))
            return true;
        /* As the childXids array is ordered, we can use binary search */
        low = 0;
        high = s->nChildXids - 1;
        while (low <= high)
        {
            int         middle;
            TransactionId probe;
 
            middle = low + (high - low) / 2;
            probe = s->childXids[middle];
            if (TransactionIdEquals(probe, xid))
                return true;
            else if (TransactionIdPrecedes(probe, xid))
                low = middle + 1;
            else
                high = middle - 1;
        }
    }
 
    return false;
}

References TransactionStateData::childXids, CurrentTransactionState, TransactionStateData::fullTransactionId, FullTransactionIdIsValid, GetTopTransactionIdIfAny(), TransactionStateData::nChildXids, nParallelCurrentXids, ParallelCurrentXids, TransactionStateData::parent, TransactionStateData::state, TRANS_ABORT, TransactionIdEquals, TransactionIdIsNormal, TransactionIdPrecedes(), and XidFromFullTransactionId.

Referenced by compute_new_xmax_infomask(), Do_MultiXactIdWait(), DoesMultiXactIdConflict(), ExecCheckTupleVisible(), ExecMergeMatched(), ExecOnConflictUpdate(), FreezeMultiXactId(), get_xid_status(), heap_delete(), heap_inplace_lock(), heap_lock_tuple(), heap_update(), heapam_index_build_range_scan(), heapam_relation_copy_for_cluster(), heapam_scan_analyze_next_tuple(), heapam_tuple_lock(), HeapTupleHeaderAdjustCmax(), HeapTupleHeaderGetCmax(), HeapTupleHeaderGetCmin(), HeapTupleHeaderIsOnlyLocked(), HeapTupleSatisfiesDirty(), HeapTupleSatisfiesMVCC(), HeapTupleSatisfiesSelf(), HeapTupleSatisfiesToast(), HeapTupleSatisfiesUpdate(), HeapTupleSatisfiesVacuumHorizon(), MultiXactIdIsRunning(), PredicateLockTID(), SnapBuildWaitSnapshot(), test_lockmode_for_conflict(), TransactionIdIsInProgress(), tts_buffer_is_current_xact_tuple(), and tts_heap_is_current_xact_tuple().

◆ UnregisterSubXactCallback()

void UnregisterSubXactCallback	(	SubXactCallback	callback,
		void *	arg
	)

Definition at line 3877 of file xact.c.

{
    SubXactCallbackItem *item;
    SubXactCallbackItem *prev;
 
    prev = NULL;
    for (item = SubXact_callbacks; item; prev = item, item = item->next)
    {
        if (item->callback == callback && item->arg == arg)
        {
            if (prev)
                prev->next = item->next;
            else
                SubXact_callbacks = item->next;
            pfree(item);
            break;
        }
    }
}

References SubXactCallbackItem::arg, arg, SubXactCallbackItem::callback, callback(), SubXactCallbackItem::next, pfree(), and SubXact_callbacks.

◆ UnregisterXactCallback()

void UnregisterXactCallback	(	XactCallback	callback,
		void *	arg
	)

Definition at line 3817 of file xact.c.

{
    XactCallbackItem *item;
    XactCallbackItem *prev;
 
    prev = NULL;
    for (item = Xact_callbacks; item; prev = item, item = item->next)
    {
        if (item->callback == callback && item->arg == arg)
        {
            if (prev)
                prev->next = item->next;
            else
                Xact_callbacks = item->next;
            pfree(item);
            break;
        }
    }
}

References XactCallbackItem::arg, arg, XactCallbackItem::callback, callback(), XactCallbackItem::next, pfree(), and Xact_callbacks.

◆ UserAbortTransactionBlock()

void UserAbortTransactionBlock ( bool chain )

Definition at line 4204 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    switch (s->blockState)
    {
            /*
             * We are inside a transaction block and we got a ROLLBACK command
             * from the user, so tell CommitTransactionCommand to abort and
             * exit the transaction block.
             */
        case TBLOCK_INPROGRESS:
            s->blockState = TBLOCK_ABORT_PENDING;
            break;
 
            /*
             * We are inside a failed transaction block and we got a ROLLBACK
             * command from the user.  Abort processing is already done, so
             * CommitTransactionCommand just has to cleanup and go back to
             * idle state.
             */
        case TBLOCK_ABORT:
            s->blockState = TBLOCK_ABORT_END;
            break;
 
            /*
             * We are inside a subtransaction.  Mark everything up to top
             * level as exitable.
             */
        case TBLOCK_SUBINPROGRESS:
        case TBLOCK_SUBABORT:
            while (s->parent != NULL)
            {
                if (s->blockState == TBLOCK_SUBINPROGRESS)
                    s->blockState = TBLOCK_SUBABORT_PENDING;
                else if (s->blockState == TBLOCK_SUBABORT)
                    s->blockState = TBLOCK_SUBABORT_END;
                else
                    elog(FATAL, "UserAbortTransactionBlock: unexpected state %s",
                         BlockStateAsString(s->blockState));
                s = s->parent;
            }
            if (s->blockState == TBLOCK_INPROGRESS)
                s->blockState = TBLOCK_ABORT_PENDING;
            else if (s->blockState == TBLOCK_ABORT)
                s->blockState = TBLOCK_ABORT_END;
            else
                elog(FATAL, "UserAbortTransactionBlock: unexpected state %s",
                     BlockStateAsString(s->blockState));
            break;
 
            /*
             * The user issued ABORT when not inside a transaction.  For
             * ROLLBACK without CHAIN, issue a WARNING and go to abort state.
             * The upcoming call to CommitTransactionCommand() will then put
             * us back into the default state.  For ROLLBACK AND CHAIN, error.
             *
             * We do the same thing with ABORT inside an implicit transaction,
             * although in this case we might be rolling back actual database
             * state changes.  (It's debatable whether we should issue a
             * WARNING in this case, but we have done so historically.)
             */
        case TBLOCK_STARTED:
        case TBLOCK_IMPLICIT_INPROGRESS:
            if (chain)
                ereport(ERROR,
                        (errcode(ERRCODE_NO_ACTIVE_SQL_TRANSACTION),
                /* translator: %s represents an SQL statement name */
                         errmsg("%s can only be used in transaction blocks",
                                "ROLLBACK AND CHAIN")));
            else
                ereport(WARNING,
                        (errcode(ERRCODE_NO_ACTIVE_SQL_TRANSACTION),
                         errmsg("there is no transaction in progress")));
            s->blockState = TBLOCK_ABORT_PENDING;
            break;
 
            /*
             * The user issued an ABORT that somehow ran inside a parallel
             * worker.  We can't cope with that.
             */
        case TBLOCK_PARALLEL_INPROGRESS:
            ereport(FATAL,
                    (errcode(ERRCODE_INVALID_TRANSACTION_STATE),
                     errmsg("cannot abort during a parallel operation")));
            break;
 
            /* These cases are invalid. */
        case TBLOCK_DEFAULT:
        case TBLOCK_BEGIN:
        case TBLOCK_SUBBEGIN:
        case TBLOCK_END:
        case TBLOCK_SUBRELEASE:
        case TBLOCK_SUBCOMMIT:
        case TBLOCK_ABORT_END:
        case TBLOCK_SUBABORT_END:
        case TBLOCK_ABORT_PENDING:
        case TBLOCK_SUBABORT_PENDING:
        case TBLOCK_SUBRESTART:
        case TBLOCK_SUBABORT_RESTART:
        case TBLOCK_PREPARE:
            elog(FATAL, "UserAbortTransactionBlock: unexpected state %s",
                 BlockStateAsString(s->blockState));
            break;
    }
 
    Assert(s->blockState == TBLOCK_ABORT_END ||
           s->blockState == TBLOCK_ABORT_PENDING);
 
    s->chain = chain;
}

References Assert(), TransactionStateData::blockState, BlockStateAsString(), TransactionStateData::chain, CurrentTransactionState, elog, ereport, errcode(), errmsg(), ERROR, FATAL, TransactionStateData::parent, TBLOCK_ABORT, TBLOCK_ABORT_END, TBLOCK_ABORT_PENDING, TBLOCK_BEGIN, TBLOCK_DEFAULT, TBLOCK_END, TBLOCK_IMPLICIT_INPROGRESS, TBLOCK_INPROGRESS, TBLOCK_PARALLEL_INPROGRESS, TBLOCK_PREPARE, TBLOCK_STARTED, TBLOCK_SUBABORT, TBLOCK_SUBABORT_END, TBLOCK_SUBABORT_PENDING, TBLOCK_SUBABORT_RESTART, TBLOCK_SUBBEGIN, TBLOCK_SUBCOMMIT, TBLOCK_SUBINPROGRESS, TBLOCK_SUBRELEASE, TBLOCK_SUBRESTART, and WARNING.

Referenced by standard_ProcessUtility().

◆ WarnNoTransactionBlock()

void WarnNoTransactionBlock	(	bool	isTopLevel,
		const char *	stmtType
	)

Definition at line 3710 of file xact.c.

{
    CheckTransactionBlock(isTopLevel, false, stmtType);
}

References CheckTransactionBlock().

Referenced by ExecSetVariableStmt(), and standard_ProcessUtility().

◆ xact_desc()

void xact_desc	(	StringInfo	buf,
		XLogReaderState *	record
	)

Definition at line 439 of file xactdesc.c.

{
    char       *rec = XLogRecGetData(record);
    uint8       info = XLogRecGetInfo(record) & XLOG_XACT_OPMASK;
 
    if (info == XLOG_XACT_COMMIT || info == XLOG_XACT_COMMIT_PREPARED)
    {
        xl_xact_commit *xlrec = (xl_xact_commit *) rec;
 
        xact_desc_commit(buf, XLogRecGetInfo(record), xlrec,
                         XLogRecGetOrigin(record));
    }
    else if (info == XLOG_XACT_ABORT || info == XLOG_XACT_ABORT_PREPARED)
    {
        xl_xact_abort *xlrec = (xl_xact_abort *) rec;
 
        xact_desc_abort(buf, XLogRecGetInfo(record), xlrec,
                        XLogRecGetOrigin(record));
    }
    else if (info == XLOG_XACT_PREPARE)
    {
        xl_xact_prepare *xlrec = (xl_xact_prepare *) rec;
 
        xact_desc_prepare(buf, XLogRecGetInfo(record), xlrec,
                          XLogRecGetOrigin(record));
    }
    else if (info == XLOG_XACT_ASSIGNMENT)
    {
        xl_xact_assignment *xlrec = (xl_xact_assignment *) rec;
 
        /*
         * Note that we ignore the WAL record's xid, since we're more
         * interested in the top-level xid that issued the record and which
         * xids are being reported here.
         */
        appendStringInfo(buf, "xtop %u: ", xlrec->xtop);
        xact_desc_assignment(buf, xlrec);
    }
    else if (info == XLOG_XACT_INVALIDATIONS)
    {
        xl_xact_invals *xlrec = (xl_xact_invals *) rec;
 
        standby_desc_invalidations(buf, xlrec->nmsgs, xlrec->msgs, InvalidOid,
                                   InvalidOid, false);
    }
}

References appendStringInfo(), buf, InvalidOid, xl_xact_invals::msgs, xl_xact_invals::nmsgs, standby_desc_invalidations(), xact_desc_abort(), xact_desc_assignment(), xact_desc_commit(), xact_desc_prepare(), XLOG_XACT_ABORT, XLOG_XACT_ABORT_PREPARED, XLOG_XACT_ASSIGNMENT, XLOG_XACT_COMMIT, XLOG_XACT_COMMIT_PREPARED, XLOG_XACT_INVALIDATIONS, XLOG_XACT_OPMASK, XLOG_XACT_PREPARE, XLogRecGetData, XLogRecGetInfo, XLogRecGetOrigin, and xl_xact_assignment::xtop.

◆ xact_identify()

const char * xact_identify ( uint8 info )

Definition at line 487 of file xactdesc.c.

{
    const char *id = NULL;
 
    switch (info & XLOG_XACT_OPMASK)
    {
        case XLOG_XACT_COMMIT:
            id = "COMMIT";
            break;
        case XLOG_XACT_PREPARE:
            id = "PREPARE";
            break;
        case XLOG_XACT_ABORT:
            id = "ABORT";
            break;
        case XLOG_XACT_COMMIT_PREPARED:
            id = "COMMIT_PREPARED";
            break;
        case XLOG_XACT_ABORT_PREPARED:
            id = "ABORT_PREPARED";
            break;
        case XLOG_XACT_ASSIGNMENT:
            id = "ASSIGNMENT";
            break;
        case XLOG_XACT_INVALIDATIONS:
            id = "INVALIDATION";
            break;
    }
 
    return id;
}

References XLOG_XACT_ABORT, XLOG_XACT_ABORT_PREPARED, XLOG_XACT_ASSIGNMENT, XLOG_XACT_COMMIT, XLOG_XACT_COMMIT_PREPARED, XLOG_XACT_INVALIDATIONS, XLOG_XACT_OPMASK, and XLOG_XACT_PREPARE.

◆ xact_redo()

void xact_redo ( XLogReaderState * record )

Definition at line 6363 of file xact.c.

{
    uint8       info = XLogRecGetInfo(record) & XLOG_XACT_OPMASK;
 
    /* Backup blocks are not used in xact records */
    Assert(!XLogRecHasAnyBlockRefs(record));
 
    if (info == XLOG_XACT_COMMIT)
    {
        xl_xact_commit *xlrec = (xl_xact_commit *) XLogRecGetData(record);
        xl_xact_parsed_commit parsed;
 
        ParseCommitRecord(XLogRecGetInfo(record), xlrec, &parsed);
        xact_redo_commit(&parsed, XLogRecGetXid(record),
                         record->EndRecPtr, XLogRecGetOrigin(record));
    }
    else if (info == XLOG_XACT_COMMIT_PREPARED)
    {
        xl_xact_commit *xlrec = (xl_xact_commit *) XLogRecGetData(record);
        xl_xact_parsed_commit parsed;
 
        ParseCommitRecord(XLogRecGetInfo(record), xlrec, &parsed);
        xact_redo_commit(&parsed, parsed.twophase_xid,
                         record->EndRecPtr, XLogRecGetOrigin(record));
 
        /* Delete TwoPhaseState gxact entry and/or 2PC file. */
        LWLockAcquire(TwoPhaseStateLock, LW_EXCLUSIVE);
        PrepareRedoRemove(parsed.twophase_xid, false);
        LWLockRelease(TwoPhaseStateLock);
    }
    else if (info == XLOG_XACT_ABORT)
    {
        xl_xact_abort *xlrec = (xl_xact_abort *) XLogRecGetData(record);
        xl_xact_parsed_abort parsed;
 
        ParseAbortRecord(XLogRecGetInfo(record), xlrec, &parsed);
        xact_redo_abort(&parsed, XLogRecGetXid(record),
                        record->EndRecPtr, XLogRecGetOrigin(record));
    }
    else if (info == XLOG_XACT_ABORT_PREPARED)
    {
        xl_xact_abort *xlrec = (xl_xact_abort *) XLogRecGetData(record);
        xl_xact_parsed_abort parsed;
 
        ParseAbortRecord(XLogRecGetInfo(record), xlrec, &parsed);
        xact_redo_abort(&parsed, parsed.twophase_xid,
                        record->EndRecPtr, XLogRecGetOrigin(record));
 
        /* Delete TwoPhaseState gxact entry and/or 2PC file. */
        LWLockAcquire(TwoPhaseStateLock, LW_EXCLUSIVE);
        PrepareRedoRemove(parsed.twophase_xid, false);
        LWLockRelease(TwoPhaseStateLock);
    }
    else if (info == XLOG_XACT_PREPARE)
    {
        /*
         * Store xid and start/end pointers of the WAL record in TwoPhaseState
         * gxact entry.
         */
        LWLockAcquire(TwoPhaseStateLock, LW_EXCLUSIVE);
        PrepareRedoAdd(XLogRecGetData(record),
                       record->ReadRecPtr,
                       record->EndRecPtr,
                       XLogRecGetOrigin(record));
        LWLockRelease(TwoPhaseStateLock);
    }
    else if (info == XLOG_XACT_ASSIGNMENT)
    {
        xl_xact_assignment *xlrec = (xl_xact_assignment *) XLogRecGetData(record);
 
        if (standbyState >= STANDBY_INITIALIZED)
            ProcArrayApplyXidAssignment(xlrec->xtop,
                                        xlrec->nsubxacts, xlrec->xsub);
    }
    else if (info == XLOG_XACT_INVALIDATIONS)
    {
        /*
         * XXX we do ignore this for now, what matters are invalidations
         * written into the commit record.
         */
    }
    else
        elog(PANIC, "xact_redo: unknown op code %u", info);
}

References Assert(), elog, XLogReaderState::EndRecPtr, LW_EXCLUSIVE, LWLockAcquire(), LWLockRelease(), xl_xact_assignment::nsubxacts, PANIC, ParseAbortRecord(), ParseCommitRecord(), PrepareRedoAdd(), PrepareRedoRemove(), ProcArrayApplyXidAssignment(), XLogReaderState::ReadRecPtr, STANDBY_INITIALIZED, standbyState, xl_xact_parsed_commit::twophase_xid, xl_xact_parsed_abort::twophase_xid, xact_redo_abort(), xact_redo_commit(), XLOG_XACT_ABORT, XLOG_XACT_ABORT_PREPARED, XLOG_XACT_ASSIGNMENT, XLOG_XACT_COMMIT, XLOG_XACT_COMMIT_PREPARED, XLOG_XACT_INVALIDATIONS, XLOG_XACT_OPMASK, XLOG_XACT_PREPARE, XLogRecGetData, XLogRecGetInfo, XLogRecGetOrigin, XLogRecGetXid, XLogRecHasAnyBlockRefs, xl_xact_assignment::xsub, and xl_xact_assignment::xtop.

◆ xactGetCommittedChildren()

int xactGetCommittedChildren ( TransactionId ** ptr )

Definition at line 5790 of file xact.c.

{
    TransactionState s = CurrentTransactionState;
 
    if (s->nChildXids == 0)
        *ptr = NULL;
    else
        *ptr = s->childXids;
 
    return s->nChildXids;
}

References TransactionStateData::childXids, CurrentTransactionState, and TransactionStateData::nChildXids.

Referenced by ExportSnapshot(), RecordTransactionAbort(), RecordTransactionCommit(), and StartPrepare().

◆ XactLogAbortRecord()

XLogRecPtr XactLogAbortRecord	(	TimestampTz	abort_time,
		int	nsubxacts,
		TransactionId *	subxacts,
		int	nrels,
		RelFileLocator *	rels,
		int	ndroppedstats,
		xl_xact_stats_item *	droppedstats,
		int	xactflags,
		TransactionId	twophase_xid,
		const char *	twophase_gid
	)

Definition at line 5986 of file xact.c.

{
    xl_xact_abort xlrec;
    xl_xact_xinfo xl_xinfo;
    xl_xact_subxacts xl_subxacts;
    xl_xact_relfilelocators xl_relfilelocators;
    xl_xact_stats_items xl_dropped_stats;
    xl_xact_twophase xl_twophase;
    xl_xact_dbinfo xl_dbinfo;
    xl_xact_origin xl_origin;
 
    uint8       info;
 
    Assert(CritSectionCount > 0);
 
    xl_xinfo.xinfo = 0;
 
    /* decide between a plain and 2pc abort */
    if (!TransactionIdIsValid(twophase_xid))
        info = XLOG_XACT_ABORT;
    else
        info = XLOG_XACT_ABORT_PREPARED;
 
 
    /* First figure out and collect all the information needed */
 
    xlrec.xact_time = abort_time;
 
    if ((xactflags & XACT_FLAGS_ACQUIREDACCESSEXCLUSIVELOCK))
        xl_xinfo.xinfo |= XACT_XINFO_HAS_AE_LOCKS;
 
    if (nsubxacts > 0)
    {
        xl_xinfo.xinfo |= XACT_XINFO_HAS_SUBXACTS;
        xl_subxacts.nsubxacts = nsubxacts;
    }
 
    if (nrels > 0)
    {
        xl_xinfo.xinfo |= XACT_XINFO_HAS_RELFILELOCATORS;
        xl_relfilelocators.nrels = nrels;
        info |= XLR_SPECIAL_REL_UPDATE;
    }
 
    if (ndroppedstats > 0)
    {
        xl_xinfo.xinfo |= XACT_XINFO_HAS_DROPPED_STATS;
        xl_dropped_stats.nitems = ndroppedstats;
    }
 
    if (TransactionIdIsValid(twophase_xid))
    {
        xl_xinfo.xinfo |= XACT_XINFO_HAS_TWOPHASE;
        xl_twophase.xid = twophase_xid;
        Assert(twophase_gid != NULL);
 
        if (XLogLogicalInfoActive())
            xl_xinfo.xinfo |= XACT_XINFO_HAS_GID;
    }
 
    if (TransactionIdIsValid(twophase_xid) && XLogLogicalInfoActive())
    {
        xl_xinfo.xinfo |= XACT_XINFO_HAS_DBINFO;
        xl_dbinfo.dbId = MyDatabaseId;
        xl_dbinfo.tsId = MyDatabaseTableSpace;
    }
 
    /*
     * Dump transaction origin information. We need this during recovery to
     * update the replication origin progress.
     */
    if (replorigin_session_origin != InvalidRepOriginId)
    {
        xl_xinfo.xinfo |= XACT_XINFO_HAS_ORIGIN;
 
        xl_origin.origin_lsn = replorigin_session_origin_lsn;
        xl_origin.origin_timestamp = replorigin_session_origin_timestamp;
    }
 
    if (xl_xinfo.xinfo != 0)
        info |= XLOG_XACT_HAS_INFO;
 
    /* Then include all the collected data into the abort record. */
 
    XLogBeginInsert();
 
    XLogRegisterData(&xlrec, MinSizeOfXactAbort);
 
    if (xl_xinfo.xinfo != 0)
        XLogRegisterData(&xl_xinfo, sizeof(xl_xinfo));
 
    if (xl_xinfo.xinfo & XACT_XINFO_HAS_DBINFO)
        XLogRegisterData(&xl_dbinfo, sizeof(xl_dbinfo));
 
    if (xl_xinfo.xinfo & XACT_XINFO_HAS_SUBXACTS)
    {
        XLogRegisterData(&xl_subxacts,
                         MinSizeOfXactSubxacts);
        XLogRegisterData(subxacts,
                         nsubxacts * sizeof(TransactionId));
    }
 
    if (xl_xinfo.xinfo & XACT_XINFO_HAS_RELFILELOCATORS)
    {
        XLogRegisterData(&xl_relfilelocators,
                         MinSizeOfXactRelfileLocators);
        XLogRegisterData(rels,
                         nrels * sizeof(RelFileLocator));
    }
 
    if (xl_xinfo.xinfo & XACT_XINFO_HAS_DROPPED_STATS)
    {
        XLogRegisterData(&xl_dropped_stats,
                         MinSizeOfXactStatsItems);
        XLogRegisterData(droppedstats,
                         ndroppedstats * sizeof(xl_xact_stats_item));
    }
 
    if (xl_xinfo.xinfo & XACT_XINFO_HAS_TWOPHASE)
    {
        XLogRegisterData(&xl_twophase, sizeof(xl_xact_twophase));
        if (xl_xinfo.xinfo & XACT_XINFO_HAS_GID)
            XLogRegisterData(twophase_gid, strlen(twophase_gid) + 1);
    }
 
    if (xl_xinfo.xinfo & XACT_XINFO_HAS_ORIGIN)
        XLogRegisterData(&xl_origin, sizeof(xl_xact_origin));
 
    /* Include the replication origin */
    XLogSetRecordFlags(XLOG_INCLUDE_ORIGIN);
 
    return XLogInsert(RM_XACT_ID, info);
}

References Assert(), CritSectionCount, xl_xact_dbinfo::dbId, InvalidRepOriginId, MinSizeOfXactAbort, MinSizeOfXactRelfileLocators, MinSizeOfXactStatsItems, MinSizeOfXactSubxacts, MyDatabaseId, MyDatabaseTableSpace, xl_xact_stats_items::nitems, xl_xact_relfilelocators::nrels, xl_xact_subxacts::nsubxacts, xl_xact_origin::origin_lsn, xl_xact_origin::origin_timestamp, replorigin_session_origin, replorigin_session_origin_lsn, replorigin_session_origin_timestamp, TransactionIdIsValid, xl_xact_dbinfo::tsId, XACT_FLAGS_ACQUIREDACCESSEXCLUSIVELOCK, xl_xact_abort::xact_time, XACT_XINFO_HAS_AE_LOCKS, XACT_XINFO_HAS_DBINFO, XACT_XINFO_HAS_DROPPED_STATS, XACT_XINFO_HAS_GID, XACT_XINFO_HAS_ORIGIN, XACT_XINFO_HAS_RELFILELOCATORS, XACT_XINFO_HAS_SUBXACTS, XACT_XINFO_HAS_TWOPHASE, xl_xact_twophase::xid, xl_xact_xinfo::xinfo, XLOG_INCLUDE_ORIGIN, XLOG_XACT_ABORT, XLOG_XACT_ABORT_PREPARED, XLOG_XACT_HAS_INFO, XLogBeginInsert(), XLogInsert(), XLogLogicalInfoActive, XLogRegisterData(), XLogSetRecordFlags(), and XLR_SPECIAL_REL_UPDATE.

Referenced by RecordTransactionAbort(), and RecordTransactionAbortPrepared().

◆ XactLogCommitRecord()

XLogRecPtr XactLogCommitRecord	(	TimestampTz	commit_time,
		int	nsubxacts,
		TransactionId *	subxacts,
		int	nrels,
		RelFileLocator *	rels,
		int	ndroppedstats,
		xl_xact_stats_item *	droppedstats,
		int	nmsgs,
		SharedInvalidationMessage *	msgs,
		bool	relcacheInval,
		int	xactflags,
		TransactionId	twophase_xid,
		const char *	twophase_gid
	)

Definition at line 5814 of file xact.c.

{
    xl_xact_commit xlrec;
    xl_xact_xinfo xl_xinfo;
    xl_xact_dbinfo xl_dbinfo;
    xl_xact_subxacts xl_subxacts;
    xl_xact_relfilelocators xl_relfilelocators;
    xl_xact_stats_items xl_dropped_stats;
    xl_xact_invals xl_invals;
    xl_xact_twophase xl_twophase;
    xl_xact_origin xl_origin;
    uint8       info;
 
    Assert(CritSectionCount > 0);
 
    xl_xinfo.xinfo = 0;
 
    /* decide between a plain and 2pc commit */
    if (!TransactionIdIsValid(twophase_xid))
        info = XLOG_XACT_COMMIT;
    else
        info = XLOG_XACT_COMMIT_PREPARED;
 
    /* First figure out and collect all the information needed */
 
    xlrec.xact_time = commit_time;
 
    if (relcacheInval)
        xl_xinfo.xinfo |= XACT_COMPLETION_UPDATE_RELCACHE_FILE;
    if (forceSyncCommit)
        xl_xinfo.xinfo |= XACT_COMPLETION_FORCE_SYNC_COMMIT;
    if ((xactflags & XACT_FLAGS_ACQUIREDACCESSEXCLUSIVELOCK))
        xl_xinfo.xinfo |= XACT_XINFO_HAS_AE_LOCKS;
 
    /*
     * Check if the caller would like to ask standbys for immediate feedback
     * once this commit is applied.
     */
    if (synchronous_commit >= SYNCHRONOUS_COMMIT_REMOTE_APPLY)
        xl_xinfo.xinfo |= XACT_COMPLETION_APPLY_FEEDBACK;
 
    /*
     * Relcache invalidations requires information about the current database
     * and so does logical decoding.
     */
    if (nmsgs > 0 || XLogLogicalInfoActive())
    {
        xl_xinfo.xinfo |= XACT_XINFO_HAS_DBINFO;
        xl_dbinfo.dbId = MyDatabaseId;
        xl_dbinfo.tsId = MyDatabaseTableSpace;
    }
 
    if (nsubxacts > 0)
    {
        xl_xinfo.xinfo |= XACT_XINFO_HAS_SUBXACTS;
        xl_subxacts.nsubxacts = nsubxacts;
    }
 
    if (nrels > 0)
    {
        xl_xinfo.xinfo |= XACT_XINFO_HAS_RELFILELOCATORS;
        xl_relfilelocators.nrels = nrels;
        info |= XLR_SPECIAL_REL_UPDATE;
    }
 
    if (ndroppedstats > 0)
    {
        xl_xinfo.xinfo |= XACT_XINFO_HAS_DROPPED_STATS;
        xl_dropped_stats.nitems = ndroppedstats;
    }
 
    if (nmsgs > 0)
    {
        xl_xinfo.xinfo |= XACT_XINFO_HAS_INVALS;
        xl_invals.nmsgs = nmsgs;
    }
 
    if (TransactionIdIsValid(twophase_xid))
    {
        xl_xinfo.xinfo |= XACT_XINFO_HAS_TWOPHASE;
        xl_twophase.xid = twophase_xid;
        Assert(twophase_gid != NULL);
 
        if (XLogLogicalInfoActive())
            xl_xinfo.xinfo |= XACT_XINFO_HAS_GID;
    }
 
    /* dump transaction origin information */
    if (replorigin_session_origin != InvalidRepOriginId)
    {
        xl_xinfo.xinfo |= XACT_XINFO_HAS_ORIGIN;
 
        xl_origin.origin_lsn = replorigin_session_origin_lsn;
        xl_origin.origin_timestamp = replorigin_session_origin_timestamp;
    }
 
    if (xl_xinfo.xinfo != 0)
        info |= XLOG_XACT_HAS_INFO;
 
    /* Then include all the collected data into the commit record. */
 
    XLogBeginInsert();
 
    XLogRegisterData(&xlrec, sizeof(xl_xact_commit));
 
    if (xl_xinfo.xinfo != 0)
        XLogRegisterData(&xl_xinfo.xinfo, sizeof(xl_xinfo.xinfo));
 
    if (xl_xinfo.xinfo & XACT_XINFO_HAS_DBINFO)
        XLogRegisterData(&xl_dbinfo, sizeof(xl_dbinfo));
 
    if (xl_xinfo.xinfo & XACT_XINFO_HAS_SUBXACTS)
    {
        XLogRegisterData(&xl_subxacts,
                         MinSizeOfXactSubxacts);
        XLogRegisterData(subxacts,
                         nsubxacts * sizeof(TransactionId));
    }
 
    if (xl_xinfo.xinfo & XACT_XINFO_HAS_RELFILELOCATORS)
    {
        XLogRegisterData(&xl_relfilelocators,
                         MinSizeOfXactRelfileLocators);
        XLogRegisterData(rels,
                         nrels * sizeof(RelFileLocator));
    }
 
    if (xl_xinfo.xinfo & XACT_XINFO_HAS_DROPPED_STATS)
    {
        XLogRegisterData(&xl_dropped_stats,
                         MinSizeOfXactStatsItems);
        XLogRegisterData(droppedstats,
                         ndroppedstats * sizeof(xl_xact_stats_item));
    }
 
    if (xl_xinfo.xinfo & XACT_XINFO_HAS_INVALS)
    {
        XLogRegisterData(&xl_invals, MinSizeOfXactInvals);
        XLogRegisterData(msgs,
                         nmsgs * sizeof(SharedInvalidationMessage));
    }
 
    if (xl_xinfo.xinfo & XACT_XINFO_HAS_TWOPHASE)
    {
        XLogRegisterData(&xl_twophase, sizeof(xl_xact_twophase));
        if (xl_xinfo.xinfo & XACT_XINFO_HAS_GID)
            XLogRegisterData(twophase_gid, strlen(twophase_gid) + 1);
    }
 
    if (xl_xinfo.xinfo & XACT_XINFO_HAS_ORIGIN)
        XLogRegisterData(&xl_origin, sizeof(xl_xact_origin));
 
    /* we allow filtering by xacts */
    XLogSetRecordFlags(XLOG_INCLUDE_ORIGIN);
 
    return XLogInsert(RM_XACT_ID, info);
}

References Assert(), CritSectionCount, xl_xact_dbinfo::dbId, forceSyncCommit, InvalidRepOriginId, MinSizeOfXactInvals, MinSizeOfXactRelfileLocators, MinSizeOfXactStatsItems, MinSizeOfXactSubxacts, MyDatabaseId, MyDatabaseTableSpace, xl_xact_stats_items::nitems, xl_xact_invals::nmsgs, xl_xact_relfilelocators::nrels, xl_xact_subxacts::nsubxacts, xl_xact_origin::origin_lsn, xl_xact_origin::origin_timestamp, replorigin_session_origin, replorigin_session_origin_lsn, replorigin_session_origin_timestamp, synchronous_commit, SYNCHRONOUS_COMMIT_REMOTE_APPLY, TransactionIdIsValid, xl_xact_dbinfo::tsId, XACT_COMPLETION_APPLY_FEEDBACK, XACT_COMPLETION_FORCE_SYNC_COMMIT, XACT_COMPLETION_UPDATE_RELCACHE_FILE, XACT_FLAGS_ACQUIREDACCESSEXCLUSIVELOCK, xl_xact_commit::xact_time, XACT_XINFO_HAS_AE_LOCKS, XACT_XINFO_HAS_DBINFO, XACT_XINFO_HAS_DROPPED_STATS, XACT_XINFO_HAS_GID, XACT_XINFO_HAS_INVALS, XACT_XINFO_HAS_ORIGIN, XACT_XINFO_HAS_RELFILELOCATORS, XACT_XINFO_HAS_SUBXACTS, XACT_XINFO_HAS_TWOPHASE, xl_xact_twophase::xid, xl_xact_xinfo::xinfo, XLOG_INCLUDE_ORIGIN, XLOG_XACT_COMMIT, XLOG_XACT_COMMIT_PREPARED, XLOG_XACT_HAS_INFO, XLogBeginInsert(), XLogInsert(), XLogLogicalInfoActive, XLogRegisterData(), XLogSetRecordFlags(), and XLR_SPECIAL_REL_UPDATE.

Referenced by RecordTransactionCommit(), and RecordTransactionCommitPrepared().

Variable Documentation

◆ bsysscan

PGDLLIMPORT bool bsysscan

extern

Definition at line 100 of file xact.c.

Referenced by heap_getnext(), ResetLogicalStreamingState(), systable_beginscan(), systable_beginscan_ordered(), systable_endscan(), systable_endscan_ordered(), table_index_fetch_tuple(), table_scan_bitmap_next_tuple(), table_scan_getnextslot(), table_scan_sample_next_block(), table_scan_sample_next_tuple(), table_tuple_fetch_row_version(), and table_tuple_get_latest_tid().

◆ CheckXidAlive

◆ DefaultXactDeferrable

PGDLLIMPORT bool DefaultXactDeferrable

extern

Definition at line 84 of file xact.c.

Referenced by StartTransaction().

◆ DefaultXactIsoLevel

PGDLLIMPORT int DefaultXactIsoLevel

extern

Definition at line 78 of file xact.c.

Referenced by StartTransaction().

◆ DefaultXactReadOnly

PGDLLIMPORT bool DefaultXactReadOnly

extern

Definition at line 81 of file xact.c.

Referenced by StartTransaction().

◆ MyXactFlags

◆ synchronous_commit

PGDLLIMPORT int synchronous_commit

extern

Definition at line 87 of file xact.c.

Referenced by AutoVacWorkerMain(), RecordTransactionCommit(), and XactLogCommitRecord().

◆ xact_is_sampled

PGDLLIMPORT bool xact_is_sampled

extern

Definition at line 296 of file xact.c.

Referenced by check_log_duration(), and StartTransaction().

◆ XactDeferrable

PGDLLIMPORT bool XactDeferrable

extern

Definition at line 85 of file xact.c.

Referenced by GetSafeSnapshot(), GetSerializableTransactionSnapshot(), RestoreTransactionCharacteristics(), SaveTransactionCharacteristics(), SerializeTransactionState(), SetSerializableTransactionSnapshot(), StartParallelWorkerTransaction(), and StartTransaction().

◆ XactIsoLevel

PGDLLIMPORT int XactIsoLevel

extern

Definition at line 79 of file xact.c.

Referenced by check_transaction_isolation(), CreateReplicationSlot(), ExportSnapshot(), InitPostgres(), RestoreTransactionCharacteristics(), SaveTransactionCharacteristics(), SerializeTransactionState(), SnapBuildExportSnapshot(), SnapBuildInitialSnapshot(), StartParallelWorkerTransaction(), and StartTransaction().

Enumerations
enum	SyncCommitLevel { SYNCHRONOUS_COMMIT_OFF , SYNCHRONOUS_COMMIT_LOCAL_FLUSH , SYNCHRONOUS_COMMIT_REMOTE_WRITE , SYNCHRONOUS_COMMIT_REMOTE_FLUSH , SYNCHRONOUS_COMMIT_REMOTE_APPLY }

enum	XactEvent { XACT_EVENT_COMMIT , XACT_EVENT_PARALLEL_COMMIT , XACT_EVENT_ABORT , XACT_EVENT_PARALLEL_ABORT , XACT_EVENT_PREPARE , XACT_EVENT_PRE_COMMIT , XACT_EVENT_PARALLEL_PRE_COMMIT , XACT_EVENT_PRE_PREPARE }

enum	SubXactEvent { SUBXACT_EVENT_START_SUB , SUBXACT_EVENT_COMMIT_SUB , SUBXACT_EVENT_ABORT_SUB , SUBXACT_EVENT_PRE_COMMIT_SUB }

Data Structures

Macros

Typedefs

Enumerations

Functions

Variables

Macro Definition Documentation

◆ GIDSIZE

◆ IsolationIsSerializable

◆ IsolationUsesXactSnapshot

◆ MinSizeOfXactAbort

◆ MinSizeOfXactAssignment

◆ MinSizeOfXactCommit

◆ MinSizeOfXactInvals

◆ MinSizeOfXactRelfileLocators

◆ MinSizeOfXactStatsItems

◆ MinSizeOfXactSubxacts

◆ SYNCHRONOUS_COMMIT_ON

◆ XACT_COMPLETION_APPLY_FEEDBACK

◆ XACT_COMPLETION_FORCE_SYNC_COMMIT

◆ XACT_COMPLETION_UPDATE_RELCACHE_FILE

◆ XACT_FLAGS_ACCESSEDTEMPNAMESPACE

◆ XACT_FLAGS_ACQUIREDACCESSEXCLUSIVELOCK

◆ XACT_FLAGS_NEEDIMMEDIATECOMMIT

◆ XACT_FLAGS_PIPELINING

◆ XACT_READ_COMMITTED

◆ XACT_READ_UNCOMMITTED

◆ XACT_REPEATABLE_READ

◆ XACT_SERIALIZABLE

◆ XACT_XINFO_HAS_AE_LOCKS

◆ XACT_XINFO_HAS_DBINFO

◆ XACT_XINFO_HAS_DROPPED_STATS

◆ XACT_XINFO_HAS_GID

◆ XACT_XINFO_HAS_INVALS

◆ XACT_XINFO_HAS_ORIGIN

◆ XACT_XINFO_HAS_RELFILELOCATORS

◆ XACT_XINFO_HAS_SUBXACTS

◆ XACT_XINFO_HAS_TWOPHASE

◆ XactCompletionApplyFeedback

◆ XactCompletionForceSyncCommit

◆ XactCompletionRelcacheInitFileInval

◆ XLOG_XACT_ABORT

◆ XLOG_XACT_ABORT_PREPARED

◆ XLOG_XACT_ASSIGNMENT

◆ XLOG_XACT_COMMIT

◆ XLOG_XACT_COMMIT_PREPARED

◆ XLOG_XACT_HAS_INFO

◆ XLOG_XACT_INVALIDATIONS

◆ XLOG_XACT_OPMASK

◆ XLOG_XACT_PREPARE

Typedef Documentation

◆ SavedTransactionCharacteristics

◆ SubXactCallback

◆ XactCallback

◆ xl_xact_abort

◆ xl_xact_assignment

◆ xl_xact_commit

◆ xl_xact_dbinfo

◆ xl_xact_invals

◆ xl_xact_origin

◆ xl_xact_parsed_abort

◆ xl_xact_parsed_commit

◆ xl_xact_parsed_prepare

◆ xl_xact_prepare

◆ xl_xact_relfilelocators

◆ xl_xact_stats_item

◆ xl_xact_stats_items

◆ xl_xact_subxacts

◆ xl_xact_twophase

◆ xl_xact_xinfo

Enumeration Type Documentation

◆ SubXactEvent

◆ SyncCommitLevel

◆ XactEvent

Function Documentation

◆ AbortCurrentTransaction()

◆ AbortOutOfAnyTransaction()

◆ BeginImplicitTransactionBlock()

◆ BeginInternalSubTransaction()

◆ BeginTransactionBlock()