diff options
Diffstat (limited to 'src/include/utils/tqual.h')
| -rw-r--r-- | src/include/utils/tqual.h | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/src/include/utils/tqual.h b/src/include/utils/tqual.h index cb15a60ca0d..b123744f193 100644 --- a/src/include/utils/tqual.h +++ b/src/include/utils/tqual.h @@ -7,7 +7,7 @@ * * Copyright (c) 1994, Regents of the University of California * - * $Id: tqual.h,v 1.16 1998/12/15 12:47:01 vadim Exp $ + * $Id: tqual.h,v 1.17 1998/12/16 11:52:11 vadim Exp $ * *------------------------------------------------------------------------- */ @@ -19,7 +19,8 @@ typedef struct SnapshotData { TransactionId xmin; /* XID < xmin are visible to me */ - TransactionId xmax; /* XID > xmax are invisible to me */ + TransactionId xmax; /* XID >= xmax are invisible to me */ + uint32 xcnt; /* # of xact below */ TransactionId *xip; /* array of xacts in progress */ } SnapshotData; @@ -27,7 +28,9 @@ typedef SnapshotData *Snapshot; #define SnapshotNow ((Snapshot) 0x0) #define SnapshotSelf ((Snapshot) 0x1) + extern Snapshot SnapshotDirty; +extern Snapshot QuerySnapshot; #define IsSnapshotNow(snapshot) ((Snapshot) snapshot == SnapshotNow) #define IsSnapshotSelf(snapshot) ((Snapshot) snapshot == SnapshotSelf) @@ -55,7 +58,11 @@ extern CommandId HeapSpecialCommandId; ((IsSnapshotDirty(snapshot)) ? \ HeapTupleSatisfiesDirty((tuple)->t_data) \ : \ - HeapTupleSatisfiesNow((tuple)->t_data) \ + ((IsSnapshotNow(snapshot)) ? \ + HeapTupleSatisfiesNow((tuple)->t_data) \ + : \ + HeapTupleSatisfiesSnapshot((tuple)->t_data, snapshot) \ + ) \ ) \ ) \ ) @@ -87,9 +94,13 @@ extern CommandId HeapSpecialCommandId; 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 void setheapoverride(bool on); -extern Snapshot GetSnapshotData(bool serialized); + +extern Snapshot GetSnapshotData(void); +extern void SetQuerySnapshot(void); +extern void FreeXactSnapshot(void); #endif /* TQUAL_H */ |