lockoptions.h File Reference

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Typedefs
typedef enum LockClauseStrength	LockClauseStrength
typedef enum LockWaitPolicy	LockWaitPolicy
typedef enum LockTupleMode	LockTupleMode

Enumerations
enum	LockClauseStrength {   LCS_NONE , LCS_FORKEYSHARE , LCS_FORSHARE , LCS_FORNOKEYUPDATE ,   LCS_FORUPDATE }
enum	LockWaitPolicy { LockWaitBlock , LockWaitSkip , LockWaitError }
enum	LockTupleMode { LockTupleKeyShare , LockTupleShare , LockTupleNoKeyExclusive , LockTupleExclusive }

Typedef Documentation

LockClauseStrength

typedef enum LockClauseStrength LockClauseStrength

LockTupleMode

typedef enum LockTupleMode LockTupleMode

LockWaitPolicy

typedef enum LockWaitPolicy LockWaitPolicy

Enumeration Type Documentation

LockClauseStrength

enum LockClauseStrength

Enumerator
LCS_NONE
LCS_FORKEYSHARE
LCS_FORSHARE
LCS_FORNOKEYUPDATE
LCS_FORUPDATE

Definition at line 21 of file lockoptions.h.

{
    LCS_NONE,                   /* no such clause - only used in PlanRowMark */
    LCS_FORKEYSHARE,            /* FOR KEY SHARE */
    LCS_FORSHARE,               /* FOR SHARE */
    LCS_FORNOKEYUPDATE,         /* FOR NO KEY UPDATE */
    LCS_FORUPDATE,              /* FOR UPDATE */
} LockClauseStrength;

LockTupleMode

enum LockTupleMode

Enumerator
LockTupleKeyShare
LockTupleShare
LockTupleNoKeyExclusive
LockTupleExclusive

Definition at line 49 of file lockoptions.h.

{
    /* SELECT FOR KEY SHARE */
    LockTupleKeyShare,
    /* SELECT FOR SHARE */
    LockTupleShare,
    /* SELECT FOR NO KEY UPDATE, and UPDATEs that don't modify key columns */
    LockTupleNoKeyExclusive,
    /* SELECT FOR UPDATE, UPDATEs that modify key columns, and DELETE */
    LockTupleExclusive,
} LockTupleMode;

LockWaitPolicy

enum LockWaitPolicy

Enumerator
LockWaitBlock
LockWaitSkip
LockWaitError

Definition at line 36 of file lockoptions.h.

{
    /* Wait for the lock to become available (default behavior) */
    LockWaitBlock,
    /* Skip rows that can't be locked (SKIP LOCKED) */
    LockWaitSkip,
    /* Raise an error if a row cannot be locked (NOWAIT) */
    LockWaitError,
} LockWaitPolicy;