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Add C comments that HEAP_MOVED_* define usage is only for pre-9.0 binary

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upgrades.
This commit is contained in:
Bruce Momjian 2010-02-08 14:10:21 +00:00
parent 3ab41f02ed
commit dfc902854a
2 changed files with 21 additions and 5 deletions
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18
src/backend/utils/time/tqual.c
View File

@ -50,7 +50,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/time/tqual.c,v 1.116 2010/02/08 04:33:54 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/time/tqual.c,v 1.117 2010/02/08 14:10:21 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -91,7 +91,7 @@ static bool XidInMVCCSnapshot(TransactionId xid, Snapshot snapshot);
* code in heapam.c relies on that!)
*
* Also, if we are cleaning up HEAP_MOVED_IN or HEAP_MOVED_OFF entries, then
* we can always set the hint bits, since old-style VACUUM FULL always used
* we can always set the hint bits, since pre-9.0 VACUUM FULL always used
* synchronous commits and didn't move tuples that weren't previously
* hinted. (This is not known by this subroutine, but is applied by its
* callers.) Note: old-style VACUUM FULL is gone, but we have to keep this
@ -167,6 +167,7 @@ HeapTupleSatisfiesSelf(HeapTupleHeader tuple, Snapshot snapshot, Buffer buffer)
if (tuple->t_infomask & HEAP_XMIN_INVALID)
return false;
/* Used by pre-9.0 binary upgrades */
if (tuple->t_infomask & HEAP_MOVED_OFF)
{
TransactionId xvac = HeapTupleHeaderGetXvac(tuple);
@ -185,6 +186,7 @@ HeapTupleSatisfiesSelf(HeapTupleHeader tuple, Snapshot snapshot, Buffer buffer)
InvalidTransactionId);
}
}
/* Used by pre-9.0 binary upgrades */
else if (tuple->t_infomask & HEAP_MOVED_IN)
{
TransactionId xvac = HeapTupleHeaderGetXvac(tuple);
@ -338,6 +340,7 @@ HeapTupleSatisfiesNow(HeapTupleHeader tuple, Snapshot snapshot, Buffer buffer)
if (tuple->t_infomask & HEAP_XMIN_INVALID)
return false;
/* Used by pre-9.0 binary upgrades */
if (tuple->t_infomask & HEAP_MOVED_OFF)
{
TransactionId xvac = HeapTupleHeaderGetXvac(tuple);
@ -356,6 +359,7 @@ HeapTupleSatisfiesNow(HeapTupleHeader tuple, Snapshot snapshot, Buffer buffer)
InvalidTransactionId);
}
}
/* Used by pre-9.0 binary upgrades */
else if (tuple->t_infomask & HEAP_MOVED_IN)
{
TransactionId xvac = HeapTupleHeaderGetXvac(tuple);
@ -502,6 +506,7 @@ HeapTupleSatisfiesToast(HeapTupleHeader tuple, Snapshot snapshot,
if (tuple->t_infomask & HEAP_XMIN_INVALID)
return false;
/* Used by pre-9.0 binary upgrades */
if (tuple->t_infomask & HEAP_MOVED_OFF)
{
TransactionId xvac = HeapTupleHeaderGetXvac(tuple);
@ -520,6 +525,7 @@ HeapTupleSatisfiesToast(HeapTupleHeader tuple, Snapshot snapshot,
InvalidTransactionId);
}
}
/* Used by pre-9.0 binary upgrades */
else if (tuple->t_infomask & HEAP_MOVED_IN)
{
TransactionId xvac = HeapTupleHeaderGetXvac(tuple);
@ -581,6 +587,7 @@ HeapTupleSatisfiesUpdate(HeapTupleHeader tuple, CommandId curcid,
if (tuple->t_infomask & HEAP_XMIN_INVALID)
return HeapTupleInvisible;
/* Used by pre-9.0 binary upgrades */
if (tuple->t_infomask & HEAP_MOVED_OFF)
{
TransactionId xvac = HeapTupleHeaderGetXvac(tuple);
@ -599,6 +606,7 @@ HeapTupleSatisfiesUpdate(HeapTupleHeader tuple, CommandId curcid,
InvalidTransactionId);
}
}
/* Used by pre-9.0 binary upgrades */
else if (tuple->t_infomask & HEAP_MOVED_IN)
{
TransactionId xvac = HeapTupleHeaderGetXvac(tuple);
@ -748,6 +756,7 @@ HeapTupleSatisfiesDirty(HeapTupleHeader tuple, Snapshot snapshot,
if (tuple->t_infomask & HEAP_XMIN_INVALID)
return false;
/* Used by pre-9.0 binary upgrades */
if (tuple->t_infomask & HEAP_MOVED_OFF)
{
TransactionId xvac = HeapTupleHeaderGetXvac(tuple);
@ -766,6 +775,7 @@ HeapTupleSatisfiesDirty(HeapTupleHeader tuple, Snapshot snapshot,
InvalidTransactionId);
}
}
/* Used by pre-9.0 binary upgrades */
else if (tuple->t_infomask & HEAP_MOVED_IN)
{
TransactionId xvac = HeapTupleHeaderGetXvac(tuple);
@ -907,6 +917,7 @@ HeapTupleSatisfiesMVCC(HeapTupleHeader tuple, Snapshot snapshot,
if (tuple->t_infomask & HEAP_XMIN_INVALID)
return false;
/* Used by pre-9.0 binary upgrades */
if (tuple->t_infomask & HEAP_MOVED_OFF)
{
TransactionId xvac = HeapTupleHeaderGetXvac(tuple);
@ -925,6 +936,7 @@ HeapTupleSatisfiesMVCC(HeapTupleHeader tuple, Snapshot snapshot,
InvalidTransactionId);
}
}
/* Used by pre-9.0 binary upgrades */
else if (tuple->t_infomask & HEAP_MOVED_IN)
{
TransactionId xvac = HeapTupleHeaderGetXvac(tuple);
@ -1066,6 +1078,7 @@ HeapTupleSatisfiesVacuum(HeapTupleHeader tuple, TransactionId OldestXmin,
{
if (tuple->t_infomask & HEAP_XMIN_INVALID)
return HEAPTUPLE_DEAD;
/* Used by pre-9.0 binary upgrades */
else if (tuple->t_infomask & HEAP_MOVED_OFF)
{
TransactionId xvac = HeapTupleHeaderGetXvac(tuple);
@ -1083,6 +1096,7 @@ HeapTupleSatisfiesVacuum(HeapTupleHeader tuple, TransactionId OldestXmin,
SetHintBits(tuple, buffer, HEAP_XMIN_COMMITTED,
InvalidTransactionId);
}
/* Used by pre-9.0 binary upgrades */
else if (tuple->t_infomask & HEAP_MOVED_IN)
{
TransactionId xvac = HeapTupleHeaderGetXvac(tuple);

8
src/include/access/htup.h
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/htup.h,v 1.111 2010/02/08 04:33:54 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/htup.h,v 1.112 2010/02/08 14:10:21 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@ -176,9 +176,11 @@ typedef HeapTupleHeaderData *HeapTupleHeader;
#define HEAP_XMAX_IS_MULTI 0x1000 /* t_xmax is a MultiXactId */
#define HEAP_UPDATED 0x2000 /* this is UPDATEd version of row */
#define HEAP_MOVED_OFF 0x4000 /* moved to another place by
* old-style VACUUM FULL */
* pre-9.0 VACUUM FULL; kept
* for binary upgrade support */
#define HEAP_MOVED_IN 0x8000 /* moved from another place by
* old-style VACUUM FULL */
* pre-9.0 VACUUM FULL; kept
* for binary upgrade support */
#define HEAP_MOVED (HEAP_MOVED_OFF | HEAP_MOVED_IN)
#define HEAP_XACT_MASK 0xFFE0 /* visibility-related bits */