diff options
Diffstat (limited to 'src/include/access/htup.h')
| -rw-r--r-- | src/include/access/htup.h | 28 |
1 files changed, 21 insertions, 7 deletions
diff --git a/src/include/access/htup.h b/src/include/access/htup.h index e57ce8a3cbe..adeb05fd560 100644 --- a/src/include/access/htup.h +++ b/src/include/access/htup.h @@ -1,4 +1,4 @@ - /*------------------------------------------------------------------------- +/*------------------------------------------------------------------------- * * htup.h * POSTGRES heap tuple definitions. @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2005, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/access/htup.h,v 1.73 2005/03/28 01:50:34 tgl Exp $ + * $PostgreSQL: pgsql/src/include/access/htup.h,v 1.74 2005/04/28 21:47:17 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -93,11 +93,11 @@ typedef struct HeapTupleFields { TransactionId t_xmin; /* inserting xact ID */ CommandId t_cmin; /* inserting command ID */ - TransactionId t_xmax; /* deleting xact ID */ + TransactionId t_xmax; /* deleting or locking xact ID */ union { - CommandId t_cmax; /* deleting command ID */ + CommandId t_cmax; /* deleting or locking command ID */ TransactionId t_xvac; /* VACUUM FULL xact ID */ } t_field4; } HeapTupleFields; @@ -152,12 +152,16 @@ typedef HeapTupleHeaderData *HeapTupleHeader; * attribute(s) */ #define HEAP_HASEXTENDED 0x000C /* the two above combined */ #define HEAP_HASOID 0x0010 /* has an object-id field */ -/* 0x0020, 0x0040 and 0x0080 are unused */ +/* 0x0020 is presently unused */ +#define HEAP_XMAX_EXCL_LOCK 0x0040 /* xmax is exclusive locker */ +#define HEAP_XMAX_SHARED_LOCK 0x0080 /* xmax is shared locker */ +/* if either LOCK bit is set, xmax hasn't deleted the tuple, only locked it */ +#define HEAP_IS_LOCKED (HEAP_XMAX_EXCL_LOCK | HEAP_XMAX_SHARED_LOCK) #define HEAP_XMIN_COMMITTED 0x0100 /* t_xmin committed */ #define HEAP_XMIN_INVALID 0x0200 /* t_xmin invalid/aborted */ #define HEAP_XMAX_COMMITTED 0x0400 /* t_xmax committed */ #define HEAP_XMAX_INVALID 0x0800 /* t_xmax invalid/aborted */ -#define HEAP_MARKED_FOR_UPDATE 0x1000 /* marked for UPDATE */ +#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 * VACUUM FULL */ @@ -406,7 +410,8 @@ typedef HeapTupleData *HeapTuple; #define XLOG_HEAP_MOVE 0x30 #define XLOG_HEAP_CLEAN 0x40 #define XLOG_HEAP_NEWPAGE 0x50 -/* opcodes 0x60, 0x70 still free */ +#define XLOG_HEAP_LOCK 0x60 +/* opcode 0x70 still free */ #define XLOG_HEAP_OPMASK 0x70 /* * When we insert 1st item on new page in INSERT/UPDATE @@ -496,4 +501,13 @@ typedef struct xl_heap_newpage #define SizeOfHeapNewpage (offsetof(xl_heap_newpage, blkno) + sizeof(BlockNumber)) +/* This is what we need to know about lock */ +typedef struct xl_heap_lock +{ + xl_heaptid target; /* locked tuple id */ + bool shared_lock; /* shared or exclusive row lock? */ +} xl_heap_lock; + +#define SizeOfHeapLock (offsetof(xl_heap_lock, shared_lock) + sizeof(bool)) + #endif /* HTUP_H */ |