diff options
Diffstat (limited to 'src/include/utils/tqual.h')
| -rw-r--r-- | src/include/utils/tqual.h | 32 |
1 files changed, 23 insertions, 9 deletions
diff --git a/src/include/utils/tqual.h b/src/include/utils/tqual.h index 7c3dece02fe..86c88892adf 100644 --- a/src/include/utils/tqual.h +++ b/src/include/utils/tqual.h @@ -8,7 +8,7 @@ * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: tqual.h,v 1.31 2001/06/18 21:38:02 momjian Exp $ + * $Id: tqual.h,v 1.32 2001/07/12 04:11:13 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -23,8 +23,9 @@ typedef struct SnapshotData { TransactionId xmin; /* XID < xmin are visible to me */ TransactionId xmax; /* XID >= xmax are invisible to me */ - uint32 xcnt; /* # of xact below */ - TransactionId *xip; /* array of xacts in progress */ + uint32 xcnt; /* # of xact ids in xip[] */ + TransactionId *xip; /* array of xact IDs in progress */ + /* note: all ids in xip[] satisfy xmin <= xip[i] < xmax */ ItemPointerData tid; /* required for Dirty snapshot -:( */ } SnapshotData; @@ -34,8 +35,8 @@ typedef SnapshotData *Snapshot; #define SnapshotSelf ((Snapshot) 0x1) #define SnapshotAny ((Snapshot) 0x2) -extern Snapshot SnapshotDirty; -extern Snapshot QuerySnapshot; +extern DLLIMPORT Snapshot SnapshotDirty; +extern DLLIMPORT Snapshot QuerySnapshot; extern DLLIMPORT Snapshot SerializableSnapshot; extern bool ReferentialIntegritySnapshotOverride; @@ -66,11 +67,11 @@ extern bool ReferentialIntegritySnapshotOverride; (IsSnapshotSelf(snapshot) ? \ HeapTupleSatisfiesItself((tuple)->t_data) \ : \ - (IsSnapshotDirty(snapshot) ? \ - HeapTupleSatisfiesDirty((tuple)->t_data) \ + (IsSnapshotNow(snapshot) ? \ + HeapTupleSatisfiesNow((tuple)->t_data) \ : \ - (IsSnapshotNow(snapshot) ? \ - HeapTupleSatisfiesNow((tuple)->t_data) \ + (IsSnapshotDirty(snapshot) ? \ + HeapTupleSatisfiesDirty((tuple)->t_data) \ : \ HeapTupleSatisfiesSnapshot((tuple)->t_data, snapshot) \ ) \ @@ -79,18 +80,31 @@ extern bool ReferentialIntegritySnapshotOverride; ) \ ) +/* Result codes for HeapTupleSatisfiesUpdate */ #define HeapTupleMayBeUpdated 0 #define HeapTupleInvisible 1 #define HeapTupleSelfUpdated 2 #define HeapTupleUpdated 3 #define HeapTupleBeingUpdated 4 +/* Result codes for HeapTupleSatisfiesVacuum */ +typedef enum +{ + HEAPTUPLE_DEAD, /* tuple is dead and deletable */ + HEAPTUPLE_LIVE, /* tuple is live (committed, no deleter) */ + HEAPTUPLE_RECENTLY_DEAD, /* tuple is dead, but not deletable yet */ + HEAPTUPLE_INSERT_IN_PROGRESS, /* inserting xact is still in progress */ + HEAPTUPLE_DELETE_IN_PROGRESS /* deleting xact is still in progress */ +} HTSV_Result; + extern bool HeapTupleSatisfiesItself(HeapTupleHeader tuple); extern bool HeapTupleSatisfiesNow(HeapTupleHeader tuple); extern bool HeapTupleSatisfiesDirty(HeapTupleHeader tuple); extern bool HeapTupleSatisfiesSnapshot(HeapTupleHeader tuple, Snapshot snapshot); extern int HeapTupleSatisfiesUpdate(HeapTuple tuple); +extern HTSV_Result HeapTupleSatisfiesVacuum(HeapTupleHeader tuple, + TransactionId XmaxRecent); extern Snapshot GetSnapshotData(bool serializable); extern void SetQuerySnapshot(void); |