diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/include/access/htup.h | 18 | ||||
| -rw-r--r-- | src/include/access/itup.h | 4 | ||||
| -rw-r--r-- | src/include/access/nbtree.h | 8 | ||||
| -rw-r--r-- | src/include/storage/bufpage.h | 4 |
4 files changed, 20 insertions, 14 deletions
diff --git a/src/include/access/htup.h b/src/include/access/htup.h index ce7b4a2d874..76306b67bb6 100644 --- a/src/include/access/htup.h +++ b/src/include/access/htup.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: htup.h,v 1.45 2001/01/24 19:43:19 momjian Exp $ + * $Id: htup.h,v 1.46 2001/02/21 19:07:04 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -32,7 +32,9 @@ #define MaxHeapAttributeNumber 1600 /* 8 * 200 */ /* - * to avoid wasting space, the attributes should be layed out in such a + * This is the on-disk copy of the tuple. + * + * To avoid wasting space, the attributes should be layed out in such a * way to reduce structure padding. */ typedef struct HeapTupleHeaderData @@ -51,12 +53,12 @@ typedef struct HeapTupleHeaderData uint16 t_infomask; /* various infos */ - uint8 t_hoff; /* sizeof tuple header */ + uint8 t_hoff; /* sizeof() tuple header */ /* ^ - 31 bytes - ^ */ bits8 t_bits[MinHeapTupleBitmapSize / 8]; - /* bit map of domains */ + /* bit map of NULLs */ /* MORE DATA FOLLOWS AT END OF STRUCT */ } HeapTupleHeaderData; @@ -174,6 +176,8 @@ typedef struct xl_heap_clean #define FirstLowInvalidHeapAttributeNumber (-8) /* + * This is the in-memory copy of the tuple. + * * This new HeapTuple for version >= 6.5 and this is why it was changed: * * 1. t_len moved off on-disk tuple data - ItemIdData is used to get len; @@ -190,10 +194,10 @@ typedef struct xl_heap_clean typedef struct HeapTupleData { uint32 t_len; /* length of *t_data */ - ItemPointerData t_self; /* SelfItemPointer */ + ItemPointerData t_self; /* SelfItemPointer */ Oid t_tableOid; /* table the tuple came from */ - MemoryContext t_datamcxt; /* mcxt in which allocated */ - HeapTupleHeader t_data; /* -> tuple header and data */ + MemoryContext t_datamcxt; /* memory context of allocation */ + HeapTupleHeader t_data; /* -> tuple header and data */ } HeapTupleData; typedef HeapTupleData *HeapTuple; diff --git a/src/include/access/itup.h b/src/include/access/itup.h index 717bcd68ae3..7d124ef56f6 100644 --- a/src/include/access/itup.h +++ b/src/include/access/itup.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: itup.h,v 1.28 2001/01/24 19:43:19 momjian Exp $ + * $Id: itup.h,v 1.29 2001/02/21 19:07:04 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -22,7 +22,7 @@ typedef struct IndexTupleData { - ItemPointerData t_tid; /* reference TID to base tuple */ + ItemPointerData t_tid; /* reference TID to heap tuple */ /* * t_info is layed out in the following fashion: diff --git a/src/include/access/nbtree.h b/src/include/access/nbtree.h index e8d0950ecc1..d87cf0eced4 100644 --- a/src/include/access/nbtree.h +++ b/src/include/access/nbtree.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: nbtree.h,v 1.51 2001/02/07 23:34:18 vadim Exp $ + * $Id: nbtree.h,v 1.52 2001/02/21 19:07:04 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -37,15 +37,17 @@ typedef struct BTPageOpaqueData BlockNumber btpo_parent; uint16 btpo_flags; +} BTPageOpaqueData; + +typedef BTPageOpaqueData *BTPageOpaque; + /* Bits defined in btpo_flags */ #define BTP_LEAF (1 << 0) /* It's a leaf page */ #define BTP_ROOT (1 << 1) /* It's the root page (has no parent) */ #define BTP_FREE (1 << 2) /* not currently used... */ #define BTP_META (1 << 3) /* Set in the meta-page only */ #define BTP_REORDER (1 << 4) /* items must be re-ordered */ -} BTPageOpaqueData; -typedef BTPageOpaqueData *BTPageOpaque; #define BTREE_METAPAGE 0 /* first page is meta */ #define BTREE_MAGIC 0x053162 diff --git a/src/include/storage/bufpage.h b/src/include/storage/bufpage.h index 7eb84e392d2..07a5f2447ce 100644 --- a/src/include/storage/bufpage.h +++ b/src/include/storage/bufpage.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: bufpage.h,v 1.39 2001/01/24 19:43:27 momjian Exp $ + * $Id: bufpage.h,v 1.40 2001/02/21 19:07:04 momjian Exp $ * *------------------------------------------------------------------------- */ @@ -23,7 +23,7 @@ #include "access/xlog.h" /* - * a postgres disk page is an abstraction layered on top of a postgres + * A postgres disk page is an abstraction layered on top of a postgres * disk block (which is simply a unit of i/o, see block.h). * * specifically, while a disk block can be unformatted, a postgres |