diff options
Diffstat (limited to 'src/include/utils/tqual.h')
| -rw-r--r-- | src/include/utils/tqual.h | 35 |
1 files changed, 25 insertions, 10 deletions
diff --git a/src/include/utils/tqual.h b/src/include/utils/tqual.h index 3d2f8531f47..cb15a60ca0d 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 1.15 1998/11/27 19:33:35 vadim Exp $ + * $Id: tqual.h,v 1.16 1998/12/15 12:47:01 vadim Exp $ * *------------------------------------------------------------------------- */ @@ -18,17 +18,20 @@ typedef struct SnapshotData { - TransactionId xmin; /* XID < xmin are visible to me */ - TransactionId xmax; /* XID > xmax are invisible to me */ - TransactionId *xip; /* array of xacts in progress */ + TransactionId xmin; /* XID < xmin are visible to me */ + TransactionId xmax; /* XID > xmax are invisible to me */ + TransactionId *xip; /* array of xacts in progress */ } SnapshotData; typedef SnapshotData *Snapshot; -#define IsSnapshotNow(snapshot) ((Snapshot) snapshot == (Snapshot) 0x0) -#define IsSnapshotSelf(snapshot) ((Snapshot) snapshot == (Snapshot) 0x1) #define SnapshotNow ((Snapshot) 0x0) #define SnapshotSelf ((Snapshot) 0x1) +extern Snapshot SnapshotDirty; + +#define IsSnapshotNow(snapshot) ((Snapshot) snapshot == SnapshotNow) +#define IsSnapshotSelf(snapshot) ((Snapshot) snapshot == SnapshotSelf) +#define IsSnapshotDirty(snapshot) ((Snapshot) snapshot == SnapshotDirty) extern TransactionId HeapSpecialTransactionId; extern CommandId HeapSpecialCommandId; @@ -49,7 +52,11 @@ extern CommandId HeapSpecialCommandId; (IsSnapshotSelf(snapshot) || heapisoverride()) ? \ HeapTupleSatisfiesItself((tuple)->t_data) \ : \ - HeapTupleSatisfiesNow((tuple)->t_data) \ + ((IsSnapshotDirty(snapshot)) ? \ + HeapTupleSatisfiesDirty((tuple)->t_data) \ + : \ + HeapTupleSatisfiesNow((tuple)->t_data) \ + ) \ ) \ ) @@ -71,10 +78,18 @@ extern CommandId HeapSpecialCommandId; ) \ ) -extern bool HeapTupleSatisfiesItself(HeapTupleHeader tuple); -extern bool HeapTupleSatisfiesNow(HeapTupleHeader tuple); +#define HeapTupleMayBeUpdated 0 +#define HeapTupleInvisible 1 +#define HeapTupleSelfUpdated 2 +#define HeapTupleUpdated 3 +#define HeapTupleBeingUpdated 4 -extern void setheapoverride(bool on); +extern bool HeapTupleSatisfiesItself(HeapTupleHeader tuple); +extern bool HeapTupleSatisfiesNow(HeapTupleHeader tuple); +extern bool HeapTupleSatisfiesDirty(HeapTupleHeader tuple); +extern int HeapTupleSatisfiesUpdate(HeapTuple tuple); +extern void setheapoverride(bool on); +extern Snapshot GetSnapshotData(bool serialized); #endif /* TQUAL_H */ |