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Remove the t_datamcxt field of HeapTupleData. This was introduced for

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the convenience of tuptoaster.c and is no longer needed, so may as well
get rid of some small amount of overhead.
This commit is contained in:
Tom Lane
2005-11-20 19:49:08 +00:00
parent 40314f2dac
commit dd218ae7b0
13 changed files with 24 additions and 66 deletions
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22
src/backend/access/heap/heapam.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/heap/heapam.c,v 1.201 2005/11/20 18:38:20 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/heap/heapam.c,v 1.202 2005/11/20 19:49:07 tgl Exp $
*
*
* INTERFACE ROUTINES
@ -78,7 +78,6 @@ initscan(HeapScanDesc scan, ScanKey key)
*/
scan->rs_nblocks = RelationGetNumberOfBlocks(scan->rs_rd);
scan->rs_ctup.t_datamcxt = NULL;
scan->rs_ctup.t_data = NULL;
scan->rs_cbuf = InvalidBuffer;
@ -129,8 +128,9 @@ heapgettup(Relation relation,
/*
* debugging stuff
*
* check validity of arguments, here and for other functions too Note: no
* locking manipulations needed--this is a local function
* check validity of arguments, here and for other functions too
*
* Note: no locking manipulations needed--this is a local function
*/
#ifdef HEAPDEBUGALL
if (ItemPointerIsValid(tid))
@ -164,7 +164,6 @@ heapgettup(Relation relation,
if (BufferIsValid(*buffer))
ReleaseBuffer(*buffer);
*buffer = InvalidBuffer;
tuple->t_datamcxt = NULL;
tuple->t_data = NULL;
return;
}
@ -182,7 +181,6 @@ heapgettup(Relation relation,
if (BufferIsValid(*buffer))
ReleaseBuffer(*buffer);
*buffer = InvalidBuffer;
tuple->t_datamcxt = NULL;
tuple->t_data = NULL;
return;
}
@ -197,7 +195,6 @@ 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);
@ -293,7 +290,6 @@ heapgettup(Relation relation,
{
bool valid;
tuple->t_datamcxt = NULL;
tuple->t_data = (HeapTupleHeader) PageGetItem((Page) dp, lpp);
tuple->t_len = ItemIdGetLength(lpp);
ItemPointerSet(&(tuple->t_self), page, lineoff);
@ -340,7 +336,6 @@ heapgettup(Relation relation,
if (BufferIsValid(*buffer))
ReleaseBuffer(*buffer);
*buffer = InvalidBuffer;
tuple->t_datamcxt = NULL;
tuple->t_data = NULL;
return;
}
@ -872,7 +867,6 @@ heap_release_fetch(Relation relation,
ReleaseBuffer(buffer);
*userbuf = InvalidBuffer;
}
tuple->t_datamcxt = NULL;
tuple->t_data = NULL;
return false;
}
@ -895,7 +889,6 @@ heap_release_fetch(Relation relation,
ReleaseBuffer(buffer);
*userbuf = InvalidBuffer;
}
tuple->t_datamcxt = NULL;
tuple->t_data = NULL;
return false;
}
@ -903,7 +896,6 @@ heap_release_fetch(Relation relation,
/*
* fill in *tuple fields
*/
tuple->t_datamcxt = NULL;
tuple->t_data = (HeapTupleHeader) PageGetItem((Page) dp, lp);
tuple->t_len = ItemIdGetLength(lp);
tuple->t_tableOid = RelationGetRelid(relation);
@ -1027,7 +1019,6 @@ heap_get_latest_tid(Relation relation,
/* OK to access the tuple */
tp.t_self = ctid;
tp.t_datamcxt = NULL;
tp.t_data = (HeapTupleHeader) PageGetItem(dp, lp);
tp.t_len = ItemIdGetLength(lp);
@ -1303,7 +1294,6 @@ heap_delete(Relation relation, ItemPointer tid,
dp = (PageHeader) BufferGetPage(buffer);
lp = PageGetItemId(dp, ItemPointerGetOffsetNumber(tid));
tp.t_datamcxt = NULL;
tp.t_data = (HeapTupleHeader) PageGetItem(dp, lp);
tp.t_len = ItemIdGetLength(lp);
tp.t_self = *tid;
@ -1612,7 +1602,6 @@ 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;
@ -2093,7 +2082,6 @@ heap_lock_tuple(Relation relation, HeapTuple tuple, Buffer *buffer,
lp = PageGetItemId(dp, ItemPointerGetOffsetNumber(tid));
Assert(ItemIdIsUsed(lp));
tuple->t_datamcxt = NULL;
tuple->t_data = (HeapTupleHeader) PageGetItem((Page) dp, lp);
tuple->t_len = ItemIdGetLength(lp);
tuple->t_tableOid = RelationGetRelid(relation);
@ -2476,13 +2464,11 @@ 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,
0,

3
src/backend/access/heap/tuptoaster.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/heap/tuptoaster.c,v 1.54 2005/11/20 18:38:20 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/heap/tuptoaster.c,v 1.55 2005/11/20 19:49:07 tgl Exp $
*
*
* INTERFACE ROUTINES
@ -774,7 +774,6 @@ toast_insert_or_update(Relation rel, HeapTuple newtup, HeapTuple oldtup)
result_tuple->t_len = new_len;
result_tuple->t_self = newtup->t_self;
result_tuple->t_tableOid = newtup->t_tableOid;
result_tuple->t_datamcxt = CurrentMemoryContext;
new_data = (HeapTupleHeader) ((char *) result_tuple + HEAPTUPLESIZE);
result_tuple->t_data = new_data;