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Some changes to prepare for LONG attributes.

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Jan
This commit is contained in:
Jan Wieck
1999-12-16 22:20:03 +00:00
parent 5ca971a18a
commit 397e9b32a3
43 changed files with 235 additions and 115 deletions
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40
src/backend/access/heap/heapam.c
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@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.60 1999/11/24 00:44:28 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/access/heap/heapam.c,v 1.61 1999/12/16 22:19:36 wieck Exp $
*
*
* INTERFACE ROUTINES
@ -117,6 +117,8 @@ initscan(HeapScanDesc scan,
* relation is empty
* ----------------
*/
scan->rs_ntup.t_datamcxt = scan->rs_ctup.t_datamcxt =
scan->rs_ptup.t_datamcxt = NULL;
scan->rs_ntup.t_data = scan->rs_ctup.t_data =
scan->rs_ptup.t_data = NULL;
scan->rs_nbuf = scan->rs_cbuf = scan->rs_pbuf = InvalidBuffer;
@ -127,8 +129,10 @@ initscan(HeapScanDesc scan,
* reverse scan
* ----------------
*/
scan->rs_ntup.t_datamcxt = scan->rs_ctup.t_datamcxt = NULL;
scan->rs_ntup.t_data = scan->rs_ctup.t_data = NULL;
scan->rs_nbuf = scan->rs_cbuf = InvalidBuffer;
scan->rs_ptup.t_datamcxt = NULL;
scan->rs_ptup.t_data = NULL;
scan->rs_pbuf = UnknownBuffer;
}
@ -138,8 +142,10 @@ initscan(HeapScanDesc scan,
* forward scan
* ----------------
*/
scan->rs_ctup.t_datamcxt = scan->rs_ptup.t_datamcxt = NULL;
scan->rs_ctup.t_data = scan->rs_ptup.t_data = NULL;
scan->rs_cbuf = scan->rs_pbuf = InvalidBuffer;
scan->rs_ntup.t_datamcxt = NULL;
scan->rs_ntup.t_data = NULL;
scan->rs_nbuf = UnknownBuffer;
} /* invalid too */
@ -272,6 +278,7 @@ heapgettup(Relation relation,
*/
if (!(pages = relation->rd_nblocks))
{
tuple->t_datamcxt = NULL;
tuple->t_data = NULL;
return;
}
@ -290,6 +297,7 @@ heapgettup(Relation relation,
if (ItemPointerIsValid(tid) == false)
{
*buffer = InvalidBuffer;
tuple->t_datamcxt = NULL;
tuple->t_data = NULL;
return;
}
@ -306,6 +314,7 @@ heapgettup(Relation relation,
lineoff = ItemPointerGetOffsetNumber(tid);
lpp = PageGetItemId(dp, lineoff);
tuple->t_datamcxt = NULL;
tuple->t_data = (HeapTupleHeader) PageGetItem((Page) dp, lpp);
tuple->t_len = ItemIdGetLength(lpp);
LockBuffer(*buffer, BUFFER_LOCK_UNLOCK);
@ -376,6 +385,7 @@ heapgettup(Relation relation,
if (page >= pages)
{
*buffer = InvalidBuffer;
tuple->t_datamcxt = NULL;
tuple->t_data = NULL;
return;
}
@ -415,6 +425,7 @@ heapgettup(Relation relation,
{
if (ItemIdIsUsed(lpp))
{
tuple->t_datamcxt = NULL;
tuple->t_data = (HeapTupleHeader) PageGetItem((Page) dp, lpp);
tuple->t_len = ItemIdGetLength(lpp);
ItemPointerSet(&(tuple->t_self), page, lineoff);
@ -466,6 +477,7 @@ heapgettup(Relation relation,
if (BufferIsValid(*buffer))
ReleaseBuffer(*buffer);
*buffer = InvalidBuffer;
tuple->t_datamcxt = NULL;
tuple->t_data = NULL;
return;
}
@ -836,6 +848,7 @@ heap_getnext(HeapScanDesc scandesc, int backw)
{
if (BufferIsValid(scan->rs_nbuf))
ReleaseBuffer(scan->rs_nbuf);
scan->rs_ntup.t_datamcxt = NULL;
scan->rs_ntup.t_data = NULL;
scan->rs_nbuf = UnknownBuffer;
return NULL;
@ -892,10 +905,12 @@ heap_getnext(HeapScanDesc scandesc, int backw)
{
if (BufferIsValid(scan->rs_pbuf))
ReleaseBuffer(scan->rs_pbuf);
scan->rs_ptup.t_datamcxt = NULL;
scan->rs_ptup.t_data = NULL;
scan->rs_pbuf = InvalidBuffer;
if (BufferIsValid(scan->rs_nbuf))
ReleaseBuffer(scan->rs_nbuf);
scan->rs_ntup.t_datamcxt = NULL;
scan->rs_ntup.t_data = NULL;
scan->rs_nbuf = InvalidBuffer;
return NULL;
@ -903,6 +918,7 @@ heap_getnext(HeapScanDesc scandesc, int backw)
if (BufferIsValid(scan->rs_pbuf))
ReleaseBuffer(scan->rs_pbuf);
scan->rs_ptup.t_datamcxt = NULL;
scan->rs_ptup.t_data = NULL;
scan->rs_pbuf = UnknownBuffer;
@ -918,6 +934,7 @@ heap_getnext(HeapScanDesc scandesc, int backw)
{
if (BufferIsValid(scan->rs_pbuf))
ReleaseBuffer(scan->rs_pbuf);
scan->rs_ptup.t_datamcxt = NULL;
scan->rs_ptup.t_data = NULL;
scan->rs_pbuf = UnknownBuffer;
HEAPDEBUG_3; /* heap_getnext returns NULL at end */
@ -976,10 +993,12 @@ heap_getnext(HeapScanDesc scandesc, int backw)
{
if (BufferIsValid(scan->rs_nbuf))
ReleaseBuffer(scan->rs_nbuf);
scan->rs_ntup.t_datamcxt = NULL;
scan->rs_ntup.t_data = NULL;
scan->rs_nbuf = InvalidBuffer;
if (BufferIsValid(scan->rs_pbuf))
ReleaseBuffer(scan->rs_pbuf);
scan->rs_ptup.t_datamcxt = NULL;
scan->rs_ptup.t_data = NULL;
scan->rs_pbuf = InvalidBuffer;
HEAPDEBUG_6; /* heap_getnext returning EOS */
@ -988,6 +1007,7 @@ heap_getnext(HeapScanDesc scandesc, int backw)
if (BufferIsValid(scan->rs_nbuf))
ReleaseBuffer(scan->rs_nbuf);
scan->rs_ntup.t_datamcxt = NULL;
scan->rs_ntup.t_data = NULL;
scan->rs_nbuf = UnknownBuffer;
}
@ -1066,10 +1086,12 @@ heap_fetch(Relation relation,
{
ReleaseBuffer(buffer);
*userbuf = InvalidBuffer;
tuple->t_datamcxt = NULL;
tuple->t_data = NULL;
return;
}
tuple->t_datamcxt = NULL;
tuple->t_data = (HeapTupleHeader) PageGetItem((Page) dp, lp);
tuple->t_len = ItemIdGetLength(lp);
@ -1156,6 +1178,7 @@ heap_get_latest_tid(Relation relation,
* ----------------
*/
tp.t_datamcxt = NULL;
t_data = tp.t_data = (HeapTupleHeader) PageGetItem((Page) dp, lp);
tp.t_len = ItemIdGetLength(lp);
tp.t_self = *tid;
@ -1270,6 +1293,7 @@ heap_delete(Relation relation, ItemPointer tid, ItemPointer ctid)
dp = (PageHeader) BufferGetPage(buffer);
lp = PageGetItemId(dp, ItemPointerGetOffsetNumber(tid));
tp.t_datamcxt = NULL;
tp.t_data = (HeapTupleHeader) PageGetItem((Page) dp, lp);
tp.t_len = ItemIdGetLength(lp);
tp.t_self = *tid;
@ -1365,6 +1389,7 @@ heap_update(Relation relation, ItemPointer otid, HeapTuple newtup,
dp = (PageHeader) BufferGetPage(buffer);
lp = PageGetItemId(dp, ItemPointerGetOffsetNumber(otid));
oldtup.t_datamcxt = NULL;
oldtup.t_data = (HeapTupleHeader) PageGetItem(dp, lp);
oldtup.t_len = ItemIdGetLength(lp);
oldtup.t_self = *otid;
@ -1488,6 +1513,7 @@ heap_mark4update(Relation relation, HeapTuple tuple, Buffer *buffer)
dp = (PageHeader) BufferGetPage(*buffer);
lp = PageGetItemId(dp, ItemPointerGetOffsetNumber(tid));
tuple->t_datamcxt = NULL;
tuple->t_data = (HeapTupleHeader) PageGetItem((Page) dp, lp);
tuple->t_len = ItemIdGetLength(lp);
@ -1665,10 +1691,14 @@ heap_restrpos(HeapScanDesc scan)
scan->rs_nbuf = InvalidBuffer;
if (!ItemPointerIsValid(&scan->rs_mptid))
{
scan->rs_ptup.t_datamcxt = NULL;
scan->rs_ptup.t_data = NULL;
}
else
{
scan->rs_ptup.t_self = scan->rs_mptid;
scan->rs_ptup.t_datamcxt = NULL;
scan->rs_ptup.t_data = (HeapTupleHeader) 0x1; /* for heapgettup */
heapgettup(scan->rs_rd,
&(scan->rs_ptup),
@ -1680,10 +1710,14 @@ heap_restrpos(HeapScanDesc scan)
}
if (!ItemPointerIsValid(&scan->rs_mctid))
{
scan->rs_ctup.t_datamcxt = NULL;
scan->rs_ctup.t_data = NULL;
}
else
{
scan->rs_ctup.t_self = scan->rs_mctid;
scan->rs_ctup.t_datamcxt = NULL;
scan->rs_ctup.t_data = (HeapTupleHeader) 0x1; /* for heapgettup */
heapgettup(scan->rs_rd,
&(scan->rs_ctup),
@ -1695,9 +1729,13 @@ heap_restrpos(HeapScanDesc scan)
}
if (!ItemPointerIsValid(&scan->rs_mntid))
{
scan->rs_ntup.t_datamcxt = NULL;
scan->rs_ntup.t_data = NULL;
}
else
{
scan->rs_ntup.t_datamcxt = NULL;
scan->rs_ntup.t_self = scan->rs_mntid;
scan->rs_ntup.t_data = (HeapTupleHeader) 0x1; /* for heapgettup */
heapgettup(scan->rs_rd,