* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/access/gist/gistutil.c,v 1.29 2008/06/19 00:46:03 alvherre Exp $
+ * $PostgreSQL: pgsql/src/backend/access/gist/gistutil.c,v 1.30 2008/07/13 20:45:46 tgl Exp $
*-------------------------------------------------------------------------
*/
#include "postgres.h"
/*
* Additionally check that the special area looks sane.
*/
- if (((PageHeader) (page))->pd_special !=
- (BLCKSZ - MAXALIGN(sizeof(GISTPageOpaqueData))))
+ if (PageGetSpecialSize(page) != MAXALIGN(sizeof(GISTPageOpaqueData)))
ereport(ERROR,
(errcode(ERRCODE_INDEX_CORRUPTED),
errmsg("index \"%s\" contains corrupted page at block %u",
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/access/hash/hashutil.c,v 1.55 2008/06/19 00:46:03 alvherre Exp $
+ * $PostgreSQL: pgsql/src/backend/access/hash/hashutil.c,v 1.56 2008/07/13 20:45:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
/*
* Additionally check that the special area looks sane.
*/
- if (((PageHeader) (page))->pd_special !=
- (BLCKSZ - MAXALIGN(sizeof(HashPageOpaqueData))))
+ if (PageGetSpecialSize(page) != MAXALIGN(sizeof(HashPageOpaqueData)))
ereport(ERROR,
(errcode(ERRCODE_INDEX_CORRUPTED),
errmsg("index \"%s\" contains corrupted page at block %u",
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/access/heap/heapam.c,v 1.260 2008/06/19 00:46:03 alvherre Exp $
+ * $PostgreSQL: pgsql/src/backend/access/heap/heapam.c,v 1.261 2008/07/13 20:45:47 tgl Exp $
*
*
* INTERFACE ROUTINES
ItemPointer tid = &(tuple->t_self);
ItemId lp;
Buffer buffer;
- PageHeader dp;
+ Page page;
OffsetNumber offnum;
bool valid;
* Need share lock on buffer to examine tuple commit status.
*/
LockBuffer(buffer, BUFFER_LOCK_SHARE);
- dp = (PageHeader) BufferGetPage(buffer);
+ page = BufferGetPage(buffer);
/*
* We'd better check for out-of-range offnum in case of VACUUM since the
* TID was obtained.
*/
offnum = ItemPointerGetOffsetNumber(tid);
- if (offnum < FirstOffsetNumber || offnum > PageGetMaxOffsetNumber(dp))
+ if (offnum < FirstOffsetNumber || offnum > PageGetMaxOffsetNumber(page))
{
LockBuffer(buffer, BUFFER_LOCK_UNLOCK);
if (keep_buf)
/*
* get the item line pointer corresponding to the requested tid
*/
- lp = PageGetItemId(dp, offnum);
+ lp = PageGetItemId(page, offnum);
/*
* Must check for deleted tuple.
/*
* fill in *tuple fields
*/
- tuple->t_data = (HeapTupleHeader) PageGetItem((Page) dp, lp);
+ tuple->t_data = (HeapTupleHeader) PageGetItem(page, lp);
tuple->t_len = ItemIdGetLength(lp);
tuple->t_tableOid = RelationGetRelid(relation);
for (;;)
{
Buffer buffer;
- PageHeader dp;
+ Page page;
OffsetNumber offnum;
ItemId lp;
HeapTupleData tp;
*/
buffer = ReadBuffer(relation, ItemPointerGetBlockNumber(&ctid));
LockBuffer(buffer, BUFFER_LOCK_SHARE);
- dp = (PageHeader) BufferGetPage(buffer);
+ page = BufferGetPage(buffer);
/*
* Check for bogus item number. This is not treated as an error
* just assume that the prior tid is OK and return it unchanged.
*/
offnum = ItemPointerGetOffsetNumber(&ctid);
- if (offnum < FirstOffsetNumber || offnum > PageGetMaxOffsetNumber(dp))
+ if (offnum < FirstOffsetNumber || offnum > PageGetMaxOffsetNumber(page))
{
UnlockReleaseBuffer(buffer);
break;
}
- lp = PageGetItemId(dp, offnum);
+ lp = PageGetItemId(page, offnum);
if (!ItemIdIsNormal(lp))
{
UnlockReleaseBuffer(buffer);
/* OK to access the tuple */
tp.t_self = ctid;
- tp.t_data = (HeapTupleHeader) PageGetItem(dp, lp);
+ tp.t_data = (HeapTupleHeader) PageGetItem(page, lp);
tp.t_len = ItemIdGetLength(lp);
/*
TransactionId xid = GetCurrentTransactionId();
ItemId lp;
HeapTupleData tp;
- PageHeader dp;
+ Page page;
Buffer buffer;
bool have_tuple_lock = false;
bool iscombo;
buffer = ReadBuffer(relation, ItemPointerGetBlockNumber(tid));
LockBuffer(buffer, BUFFER_LOCK_EXCLUSIVE);
- dp = (PageHeader) BufferGetPage(buffer);
- lp = PageGetItemId(dp, ItemPointerGetOffsetNumber(tid));
+ page = BufferGetPage(buffer);
+ lp = PageGetItemId(page, ItemPointerGetOffsetNumber(tid));
Assert(ItemIdIsNormal(lp));
- tp.t_data = (HeapTupleHeader) PageGetItem(dp, lp);
+ tp.t_data = (HeapTupleHeader) PageGetItem(page, lp);
tp.t_len = ItemIdGetLength(lp);
tp.t_self = *tid;
* the subsequent page pruning will be a no-op and the hint will be
* cleared.
*/
- PageSetPrunable(dp, xid);
+ PageSetPrunable(page, xid);
/* store transaction information of xact deleting the tuple */
tp.t_data->t_infomask &= ~(HEAP_XMAX_COMMITTED |
recptr = XLogInsert(RM_HEAP_ID, XLOG_HEAP_DELETE, rdata);
- PageSetLSN(dp, recptr);
- PageSetTLI(dp, ThisTimeLineID);
+ PageSetLSN(page, recptr);
+ PageSetTLI(page, ThisTimeLineID);
}
END_CRIT_SECTION();
ItemId lp;
HeapTupleData oldtup;
HeapTuple heaptup;
- PageHeader dp;
+ Page page;
Buffer buffer,
newbuf;
bool need_toast,
buffer = ReadBuffer(relation, ItemPointerGetBlockNumber(otid));
LockBuffer(buffer, BUFFER_LOCK_EXCLUSIVE);
- dp = (PageHeader) BufferGetPage(buffer);
- lp = PageGetItemId(dp, ItemPointerGetOffsetNumber(otid));
+ page = BufferGetPage(buffer);
+ lp = PageGetItemId(page, ItemPointerGetOffsetNumber(otid));
Assert(ItemIdIsNormal(lp));
- oldtup.t_data = (HeapTupleHeader) PageGetItem(dp, lp);
+ oldtup.t_data = (HeapTupleHeader) PageGetItem(page, lp);
oldtup.t_len = ItemIdGetLength(lp);
oldtup.t_self = *otid;
HeapTupleHasExternal(newtup) ||
newtup->t_len > TOAST_TUPLE_THRESHOLD);
- pagefree = PageGetHeapFreeSpace((Page) dp);
+ pagefree = PageGetHeapFreeSpace(page);
newtupsize = MAXALIGN(newtup->t_len);
/* Re-acquire the lock on the old tuple's page. */
LockBuffer(buffer, BUFFER_LOCK_EXCLUSIVE);
/* Re-check using the up-to-date free space */
- pagefree = PageGetHeapFreeSpace((Page) dp);
+ pagefree = PageGetHeapFreeSpace(page);
if (newtupsize > pagefree)
{
/*
else
{
/* Set a hint that the old page could use prune/defrag */
- PageSetFull(dp);
+ PageSetFull(page);
}
/* NO EREPORT(ERROR) from here till changes are logged */
* not to optimize for aborts. Note that heap_xlog_update must be kept in
* sync if this decision changes.
*/
- PageSetPrunable(dp, xid);
+ PageSetPrunable(page, xid);
if (use_hot_update)
{
HTSU_Result result;
ItemPointer tid = &(tuple->t_self);
ItemId lp;
- PageHeader dp;
+ Page page;
TransactionId xid;
TransactionId xmax;
uint16 old_infomask;
*buffer = ReadBuffer(relation, ItemPointerGetBlockNumber(tid));
LockBuffer(*buffer, BUFFER_LOCK_EXCLUSIVE);
- dp = (PageHeader) BufferGetPage(*buffer);
- lp = PageGetItemId(dp, ItemPointerGetOffsetNumber(tid));
+ page = BufferGetPage(*buffer);
+ lp = PageGetItemId(page, ItemPointerGetOffsetNumber(tid));
Assert(ItemIdIsNormal(lp));
- tuple->t_data = (HeapTupleHeader) PageGetItem((Page) dp, lp);
+ tuple->t_data = (HeapTupleHeader) PageGetItem(page, lp);
tuple->t_len = ItemIdGetLength(lp);
tuple->t_tableOid = RelationGetRelid(relation);
recptr = XLogInsert(RM_HEAP_ID, XLOG_HEAP_LOCK, rdata);
- PageSetLSN(dp, recptr);
- PageSetTLI(dp, ThisTimeLineID);
+ PageSetLSN(page, recptr);
+ PageSetTLI(page, ThisTimeLineID);
}
END_CRIT_SECTION();
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/access/heap/hio.c,v 1.71 2008/06/08 22:00:47 alvherre Exp $
+ * $PostgreSQL: pgsql/src/backend/access/heap/hio.c,v 1.72 2008/07/13 20:45:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
Buffer otherBuffer, bool use_fsm)
{
Buffer buffer = InvalidBuffer;
- Page pageHeader;
+ Page page;
Size pageFreeSpace,
saveFreeSpace;
BlockNumber targetBlock,
* Now we can check to see if there's enough free space here. If so,
* we're done.
*/
- pageHeader = (Page) BufferGetPage(buffer);
- pageFreeSpace = PageGetHeapFreeSpace(pageHeader);
+ page = BufferGetPage(buffer);
+ pageFreeSpace = PageGetHeapFreeSpace(page);
if (len + saveFreeSpace <= pageFreeSpace)
{
/* use this page as future insert target, too */
* is empty (this should never happen, but if it does we don't want to
* risk wiping out valid data).
*/
- pageHeader = (Page) BufferGetPage(buffer);
+ page = BufferGetPage(buffer);
- if (!PageIsNew((PageHeader) pageHeader))
+ if (!PageIsNew(page))
elog(ERROR, "page %u of relation \"%s\" should be empty but is not",
BufferGetBlockNumber(buffer),
RelationGetRelationName(relation));
- PageInit(pageHeader, BufferGetPageSize(buffer), 0);
+ PageInit(page, BufferGetPageSize(buffer), 0);
- if (len > PageGetHeapFreeSpace(pageHeader))
+ if (len > PageGetHeapFreeSpace(page))
{
/* We should not get here given the test at the top */
elog(PANIC, "tuple is too big: size %lu", (unsigned long) len);
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/access/heap/pruneheap.c,v 1.15 2008/06/19 00:46:03 alvherre Exp $
+ * $PostgreSQL: pgsql/src/backend/access/heap/pruneheap.c,v 1.16 2008/07/13 20:45:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
void
heap_page_prune_opt(Relation relation, Buffer buffer, TransactionId OldestXmin)
{
- PageHeader dp = (PageHeader) BufferGetPage(buffer);
+ Page page = BufferGetPage(buffer);
Size minfree;
/*
* Forget it if page is not hinted to contain something prunable that's
* older than OldestXmin.
*/
- if (!PageIsPrunable(dp, OldestXmin))
+ if (!PageIsPrunable(page, OldestXmin))
return;
/*
HEAP_DEFAULT_FILLFACTOR);
minfree = Max(minfree, BLCKSZ / 10);
- if (PageIsFull(dp) || PageGetHeapFreeSpace((Page) dp) < minfree)
+ if (PageIsFull(page) || PageGetHeapFreeSpace(page) < minfree)
{
/* OK, try to get exclusive buffer lock */
if (!ConditionalLockBufferForCleanup(buffer))
* prune. (We needn't recheck PageIsPrunable, since no one else could
* have pruned while we hold pin.)
*/
- if (PageIsFull(dp) || PageGetHeapFreeSpace((Page) dp) < minfree)
+ if (PageIsFull(page) || PageGetHeapFreeSpace(page) < minfree)
{
/* OK to prune (though not to remove redirects) */
(void) heap_page_prune(relation, buffer, OldestXmin, false, true);
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/access/nbtree/nbtpage.c,v 1.109 2008/05/12 00:00:45 alvherre Exp $
+ * $PostgreSQL: pgsql/src/backend/access/nbtree/nbtpage.c,v 1.110 2008/07/13 20:45:47 tgl Exp $
*
* NOTES
* Postgres btree pages look like ordinary relation pages. The opaque
/*
* Additionally check that the special area looks sane.
*/
- if (((PageHeader) (page))->pd_special !=
- (BLCKSZ - MAXALIGN(sizeof(BTPageOpaqueData))))
+ if (PageGetSpecialSize(page) != MAXALIGN(sizeof(BTPageOpaqueData)))
ereport(ERROR,
(errcode(ERRCODE_INDEX_CORRUPTED),
errmsg("index \"%s\" contains corrupted page at block %u",
/* Initialize the new page before returning it */
page = BufferGetPage(buf);
- Assert(PageIsNew((PageHeader) page));
+ Assert(PageIsNew(page));
_bt_pageinit(page, BufferGetPageSize(buf));
}
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.315 2008/06/30 22:10:43 momjian Exp $
+ * $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.316 2008/07/13 20:45:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
XLogCheckBuffer(XLogRecData *rdata, bool doPageWrites,
XLogRecPtr *lsn, BkpBlock *bkpb)
{
- PageHeader page;
+ Page page;
- page = (PageHeader) BufferGetBlock(rdata->buffer);
+ page = BufferGetPage(rdata->buffer);
/*
* XXX We assume page LSN is first data on *every* page that can be passed
* to XLogInsert, whether it otherwise has the standard page layout or
* not.
*/
- *lsn = page->pd_lsn;
+ *lsn = PageGetLSN(page);
if (doPageWrites &&
- XLByteLE(page->pd_lsn, RedoRecPtr))
+ XLByteLE(PageGetLSN(page), RedoRecPtr))
{
/*
* The page needs to be backed up, so set up *bkpb
if (rdata->buffer_std)
{
/* Assume we can omit data between pd_lower and pd_upper */
- uint16 lower = page->pd_lower;
- uint16 upper = page->pd_upper;
+ uint16 lower = ((PageHeader) page)->pd_lower;
+ uint16 upper = ((PageHeader) page)->pd_upper;
if (lower >= SizeOfPageHeaderData &&
upper > lower &&
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/backend/access/transam/xlogutils.c,v 1.56 2008/06/19 00:46:03 alvherre Exp $
+ * $PostgreSQL: pgsql/src/backend/access/transam/xlogutils.c,v 1.57 2008/07/13 20:45:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
/* check that page has been initialized */
Page page = (Page) BufferGetPage(buffer);
- if (PageIsNew((PageHeader) page))
+ if (PageIsNew(page))
{
UnlockReleaseBuffer(buffer);
log_invalid_page(rnode, blkno, true);
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/commands/sequence.c,v 1.153 2008/06/12 09:12:30 heikki Exp $
+ * $PostgreSQL: pgsql/src/backend/commands/sequence.c,v 1.154 2008/07/13 20:45:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
Oid seqoid;
Relation rel;
Buffer buf;
- PageHeader page;
+ Page page;
sequence_magic *sm;
HeapTuple tuple;
TupleDesc tupDesc;
buf = ReadBuffer(rel, P_NEW);
Assert(BufferGetBlockNumber(buf) == 0);
- page = (PageHeader) BufferGetPage(buf);
+ page = BufferGetPage(buf);
- PageInit((Page) page, BufferGetPageSize(buf), sizeof(sequence_magic));
+ PageInit(page, BufferGetPageSize(buf), sizeof(sequence_magic));
sm = (sequence_magic *) PageGetSpecialPointer(page);
sm->magic = SEQ_MAGIC;
static Form_pg_sequence
read_info(SeqTable elm, Relation rel, Buffer *buf)
{
- PageHeader page;
+ Page page;
ItemId lp;
HeapTupleData tuple;
sequence_magic *sm;
*buf = ReadBuffer(rel, 0);
LockBuffer(*buf, BUFFER_LOCK_EXCLUSIVE);
- page = (PageHeader) BufferGetPage(*buf);
+ page = BufferGetPage(*buf);
sm = (sequence_magic *) PageGetSpecialPointer(page);
if (sm->magic != SEQ_MAGIC)
lp = PageGetItemId(page, FirstOffsetNumber);
Assert(ItemIdIsNormal(lp));
- tuple.t_data = (HeapTupleHeader) PageGetItem((Page) page, lp);
+ tuple.t_data = (HeapTupleHeader) PageGetItem(page, lp);
seq = (Form_pg_sequence) GETSTRUCT(&tuple);
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/commands/trigger.c,v 1.234 2008/05/15 00:17:39 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/commands/trigger.c,v 1.235 2008/07/13 20:45:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
}
else
{
- PageHeader dp;
+ Page page;
ItemId lp;
buffer = ReadBuffer(relation, ItemPointerGetBlockNumber(tid));
- dp = (PageHeader) BufferGetPage(buffer);
- lp = PageGetItemId(dp, ItemPointerGetOffsetNumber(tid));
+ page = BufferGetPage(buffer);
+ lp = PageGetItemId(page, ItemPointerGetOffsetNumber(tid));
Assert(ItemIdIsNormal(lp));
- tuple.t_data = (HeapTupleHeader) PageGetItem((Page) dp, lp);
+ tuple.t_data = (HeapTupleHeader) PageGetItem(page, lp);
tuple.t_len = ItemIdGetLength(lp);
tuple.t_self = *tid;
tuple.t_tableOid = RelationGetRelid(relation);
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/optimizer/util/plancat.c,v 1.147 2008/06/19 00:46:04 alvherre Exp $
+ * $PostgreSQL: pgsql/src/backend/optimizer/util/plancat.c,v 1.148 2008/07/13 20:45:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
tuple_width += sizeof(HeapTupleHeaderData);
tuple_width += sizeof(ItemPointerData);
/* note: integer division is intentional here */
- density = (BLCKSZ - sizeof(PageHeaderData)) / tuple_width;
+ density = (BLCKSZ - SizeOfPageHeaderData) / tuple_width;
}
*tuples = rint(density * (double) curpages);
break;
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.233 2008/06/19 00:46:05 alvherre Exp $
+ * $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.234 2008/07/13 20:45:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
* always have left a zero-filled buffer, complain if not PageIsNew.
*/
bufBlock = isLocalBuf ? LocalBufHdrGetBlock(bufHdr) : BufHdrGetBlock(bufHdr);
- if (!PageIsNew((PageHeader) bufBlock))
+ if (!PageIsNew((Page) bufBlock))
ereport(ERROR,
(errmsg("unexpected data beyond EOF in block %u of relation %u/%u/%u",
blockNum, smgr->smgr_rnode.spcNode, smgr->smgr_rnode.dbNode, smgr->smgr_rnode.relNode),
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/access/hash.h,v 1.88 2008/06/19 00:46:05 alvherre Exp $
+ * $PostgreSQL: pgsql/src/include/access/hash.h,v 1.89 2008/07/13 20:45:47 tgl Exp $
*
* NOTES
* modeled after Margo Seltzer's hash implementation for unix.
* Maximum size of a hash index item (it's okay to have only one per page)
*/
#define HashMaxItemSize(page) \
- (PageGetPageSize(page) - \
- sizeof(PageHeaderData) - \
- MAXALIGN(sizeof(HashPageOpaqueData)) - \
- sizeof(ItemIdData))
+ MAXALIGN_DOWN(PageGetPageSize(page) - \
+ SizeOfPageHeaderData - \
+ sizeof(ItemIdData) - \
+ MAXALIGN(sizeof(HashPageOpaqueData)))
#define HASH_MIN_FILLFACTOR 10
#define HASH_DEFAULT_FILLFACTOR 75
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/access/htup.h,v 1.99 2008/05/12 00:00:53 alvherre Exp $
+ * $PostgreSQL: pgsql/src/include/access/htup.h,v 1.100 2008/07/13 20:45:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
* other stuff that has to be on a disk page. Since heap pages use no
* "special space", there's no deduction for that.
*
- * NOTE: we do not need to count an ItemId for the tuple because
- * sizeof(PageHeaderData) includes the first ItemId on the page. But beware
- * of assuming that, say, you can fit 2 tuples of size MaxHeapTupleSize/2
- * on the same page.
+ * NOTE: we allow for the ItemId that must point to the tuple, ensuring that
+ * an otherwise-empty page can indeed hold a tuple of this size. Because
+ * ItemIds and tuples have different alignment requirements, don't assume that
+ * you can, say, fit 2 tuples of size MaxHeapTupleSize/2 on the same page.
*/
-#define MaxHeapTupleSize (BLCKSZ - MAXALIGN(sizeof(PageHeaderData)))
+#define MaxHeapTupleSize (BLCKSZ - MAXALIGN(SizeOfPageHeaderData + sizeof(ItemIdData)))
/*
* MaxHeapTuplesPerPage is an upper bound on the number of tuples that can
* require increases in the size of work arrays.
*/
#define MaxHeapTuplesPerPage \
- ((int) ((BLCKSZ - offsetof(PageHeaderData, pd_linp)) / \
+ ((int) ((BLCKSZ - SizeOfPageHeaderData) / \
(MAXALIGN(offsetof(HeapTupleHeaderData, t_bits)) + sizeof(ItemIdData))))
/*
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/access/itup.h,v 1.49 2008/01/01 19:45:56 momjian Exp $
+ * $PostgreSQL: pgsql/src/include/access/itup.h,v 1.50 2008/07/13 20:45:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
* must be maxaligned, and it must have an associated item pointer.
*/
#define MaxIndexTuplesPerPage \
- ((int) ((BLCKSZ - offsetof(PageHeaderData, pd_linp)) / \
+ ((int) ((BLCKSZ - SizeOfPageHeaderData) / \
(MAXALIGN(sizeof(IndexTupleData) + 1) + sizeof(ItemIdData))))
* Portions Copyright (c) 1996-2008, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/access/nbtree.h,v 1.120 2008/06/19 00:46:06 alvherre Exp $
+ * $PostgreSQL: pgsql/src/include/access/nbtree.h,v 1.121 2008/07/13 20:45:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
*
* We actually need to be able to fit three items on every page,
* so restrict any one item to 1/3 the per-page available space.
- *
- * Note: sizeof(PageHeaderData) includes the first ItemId, but we have
- * to allow for 2 more, as well as the end-of-page special space.
*/
#define BTMaxItemSize(page) \
MAXALIGN_DOWN((PageGetPageSize(page) - \
- MAXALIGN(sizeof(PageHeaderData) + 2*sizeof(ItemIdData)) - \
+ MAXALIGN(SizeOfPageHeaderData + 3*sizeof(ItemIdData)) - \
MAXALIGN(sizeof(BTPageOpaqueData))) / 3)
/*
*
* Copyright (c) 2000-2008, PostgreSQL Global Development Group
*
- * $PostgreSQL: pgsql/src/include/access/tuptoaster.h,v 1.40 2008/06/19 00:46:06 alvherre Exp $
+ * $PostgreSQL: pgsql/src/include/access/tuptoaster.h,v 1.41 2008/07/13 20:45:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
*/
#define TOAST_TUPLES_PER_PAGE 4
-/* Note: sizeof(PageHeaderData) includes the first ItemId on the page */
#define TOAST_TUPLE_THRESHOLD \
MAXALIGN_DOWN((BLCKSZ - \
- MAXALIGN(sizeof(PageHeaderData) + (TOAST_TUPLES_PER_PAGE-1) * sizeof(ItemIdData))) \
+ MAXALIGN(SizeOfPageHeaderData + TOAST_TUPLES_PER_PAGE * sizeof(ItemIdData))) \
/ TOAST_TUPLES_PER_PAGE)
#define TOAST_TUPLE_TARGET TOAST_TUPLE_THRESHOLD
*/
#define EXTERN_TUPLES_PER_PAGE 4 /* tweak only this */
-/* Note: sizeof(PageHeaderData) includes the first ItemId on the page */
#define EXTERN_TUPLE_MAX_SIZE \
MAXALIGN_DOWN((BLCKSZ - \
- MAXALIGN(sizeof(PageHeaderData) + (EXTERN_TUPLES_PER_PAGE-1) * sizeof(ItemIdData))) \
+ MAXALIGN(SizeOfPageHeaderData + EXTERN_TUPLES_PER_PAGE * sizeof(ItemIdData))) \
/ EXTERN_TUPLES_PER_PAGE)
#define TOAST_MAX_CHUNK_SIZE \
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