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Remove the t_datamcxt field of HeapTupleData. This was introduced for 

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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12
src/backend/access/common/heaptuple.c
View File

@ -16,7 +16,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/common/heaptuple.c,v 1.102 2005/10/19 22:30:30 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/common/heaptuple.c,v 1.103 2005/11/20 19:49:06 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -623,7 +623,6 @@ heap_copytuple(HeapTuple tuple)
newTuple->t_len = tuple->t_len;
newTuple->t_self = tuple->t_self;
newTuple->t_tableOid = tuple->t_tableOid;
newTuple->t_datamcxt = CurrentMemoryContext;
newTuple->t_data = (HeapTupleHeader) ((char *) newTuple + HEAPTUPLESIZE);
memcpy((char *) newTuple->t_data, (char *) tuple->t_data, tuple->t_len);
return newTuple;
@ -647,7 +646,6 @@ heap_copytuple_with_tuple(HeapTuple src, HeapTuple dest)
dest->t_len = src->t_len;
dest->t_self = src->t_self;
dest->t_tableOid = src->t_tableOid;
dest->t_datamcxt = CurrentMemoryContext;
dest->t_data = (HeapTupleHeader) palloc(src->t_len);
memcpy((char *) dest->t_data, (char *) src->t_data, src->t_len);
}
@ -725,7 +723,6 @@ heap_form_tuple(TupleDesc tupleDescriptor,
* HeapTupleData management structure are allocated in one chunk.
*/
tuple = (HeapTuple) palloc0(HEAPTUPLESIZE + len);
tuple->t_datamcxt = CurrentMemoryContext;
tuple->t_data = td = (HeapTupleHeader) ((char *) tuple + HEAPTUPLESIZE);
/*
@ -833,7 +830,6 @@ heap_formtuple(TupleDesc tupleDescriptor,
* HeapTupleData management structure are allocated in one chunk.
*/
tuple = (HeapTuple) palloc0(HEAPTUPLESIZE + len);
tuple->t_datamcxt = CurrentMemoryContext;
tuple->t_data = td = (HeapTupleHeader) ((char *) tuple + HEAPTUPLESIZE);
/*
@ -1516,11 +1512,6 @@ slot_attisnull(TupleTableSlot *slot, int attnum)
void
heap_freetuple(HeapTuple htup)
{
if (htup->t_data != NULL)
if (htup->t_datamcxt != NULL && (char *) (htup->t_data) !=
((char *) htup + HEAPTUPLESIZE))
pfree(htup->t_data);
pfree(htup);
}
@ -1559,7 +1550,6 @@ heap_addheader(int natts, /* max domain index */
len = hoff + structlen;
tuple = (HeapTuple) palloc0(HEAPTUPLESIZE + len);
tuple->t_datamcxt = CurrentMemoryContext;
tuple->t_data = td = (HeapTupleHeader) ((char *) tuple + HEAPTUPLESIZE);
tuple->t_len = len;

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;

3
src/backend/access/index/genam.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/access/index/genam.c,v 1.49 2005/10/15 02:49:09 momjian Exp $
* $PostgreSQL: pgsql/src/backend/access/index/genam.c,v 1.50 2005/11/20 19:49:07 tgl Exp $
*
* NOTES
* many of the old access method routines have been turned into
@ -98,7 +98,6 @@ RelationGetIndexScan(Relation indexRelation,
ItemPointerSetInvalid(&scan->currentMarkData);
ItemPointerSetInvalid(&scan->xs_ctup.t_self);
scan->xs_ctup.t_datamcxt = NULL;
scan->xs_ctup.t_data = NULL;
scan->xs_cbuf = InvalidBuffer;

3
src/backend/commands/trigger.c
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/trigger.c,v 1.195 2005/10/15 02:49:15 momjian Exp $
* $PostgreSQL: pgsql/src/backend/commands/trigger.c,v 1.196 2005/11/20 19:49:07 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1769,7 +1769,6 @@ ltrmark:;
Assert(ItemIdIsUsed(lp));
tuple.t_datamcxt = NULL;
tuple.t_data = (HeapTupleHeader) PageGetItem((Page) dp, lp);
tuple.t_len = ItemIdGetLength(lp);
tuple.t_self = *tid;

9
src/backend/commands/vacuum.c
View File

@ -13,7 +13,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.317 2005/10/15 02:49:16 momjian Exp $
* $PostgreSQL: pgsql/src/backend/commands/vacuum.c,v 1.318 2005/11/20 19:49:07 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1338,7 +1338,6 @@ scan_heap(VRelStats *vacrelstats, Relation onerel,
continue;
}
tuple.t_datamcxt = NULL;
tuple.t_data = (HeapTupleHeader) PageGetItem(page, itemid);
tuple.t_len = ItemIdGetLength(itemid);
ItemPointerSet(&(tuple.t_self), blkno, offnum);
@ -1758,7 +1757,6 @@ repair_frag(VRelStats *vacrelstats, Relation onerel,
if (!ItemIdIsUsed(itemid))
continue;
tuple.t_datamcxt = NULL;
tuple.t_data = (HeapTupleHeader) PageGetItem(page, itemid);
tuple_len = tuple.t_len = ItemIdGetLength(itemid);
ItemPointerSet(&(tuple.t_self), blkno, offnum);
@ -1937,7 +1935,6 @@ repair_frag(VRelStats *vacrelstats, Relation onerel,
break;
}
/* OK, switch our attention to the next tuple in chain */
tp.t_datamcxt = NULL;
tp.t_data = nextTdata;
tp.t_self = nextTid;
tlen = tp.t_len = ItemIdGetLength(nextItemid);
@ -2064,7 +2061,6 @@ repair_frag(VRelStats *vacrelstats, Relation onerel,
chain_move_failed = true;
break; /* out of check-all-items loop */
}
tp.t_datamcxt = NULL;
tp.t_data = PTdata;
tlen = tp.t_len = ItemIdGetLength(Pitemid);
if (freeCbuf)
@ -2122,7 +2118,6 @@ repair_frag(VRelStats *vacrelstats, Relation onerel,
Citemid = PageGetItemId(Cpage,
ItemPointerGetOffsetNumber(&(tuple.t_self)));
tuple.t_datamcxt = NULL;
tuple.t_data = (HeapTupleHeader) PageGetItem(Cpage, Citemid);
tuple_len = tuple.t_len = ItemIdGetLength(Citemid);
@ -2582,7 +2577,6 @@ move_chain_tuple(Relation rel,
newitemid = PageGetItemId(dst_page, newoff);
/* drop temporary copy, and point to the version on the dest page */
pfree(newtup.t_data);
newtup.t_datamcxt = NULL;
newtup.t_data = (HeapTupleHeader) PageGetItem(dst_page, newitemid);
ItemPointerSet(&(newtup.t_self), dst_vacpage->blkno, newoff);
@ -2692,7 +2686,6 @@ move_plain_tuple(Relation rel,
dst_vacpage->offsets_used, dst_vacpage->offsets_free);
newitemid = PageGetItemId(dst_page, newoff);
pfree(newtup.t_data);
newtup.t_datamcxt = NULL;
newtup.t_data = (HeapTupleHeader) PageGetItem(dst_page, newitemid);
ItemPointerSet(&(newtup.t_data->t_ctid), dst_vacpage->blkno, newoff);
newtup.t_self = newtup.t_data->t_ctid;

4
src/backend/commands/vacuumlazy.c
View File

@ -31,7 +31,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/commands/vacuumlazy.c,v 1.61 2005/10/15 02:49:16 momjian Exp $
* $PostgreSQL: pgsql/src/backend/commands/vacuumlazy.c,v 1.62 2005/11/20 19:49:07 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -349,7 +349,6 @@ lazy_scan_heap(Relation onerel, LVRelStats *vacrelstats,
continue;
}
tuple.t_datamcxt = NULL;
tuple.t_data = (HeapTupleHeader) PageGetItem(page, itemid);
tuple.t_len = ItemIdGetLength(itemid);
ItemPointerSet(&(tuple.t_self), blkno, offnum);
@ -885,7 +884,6 @@ count_nondeletable_pages(Relation onerel, LVRelStats *vacrelstats)
if (!ItemIdIsUsed(itemid))
continue;
tuple.t_datamcxt = NULL;
tuple.t_data = (HeapTupleHeader) PageGetItem(page, itemid);
tuple.t_len = ItemIdGetLength(itemid);
ItemPointerSet(&(tuple.t_self), blkno, offnum);

3
src/backend/executor/nodeHash.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/executor/nodeHash.c,v 1.96 2005/10/15 02:49:17 momjian Exp $
* $PostgreSQL: pgsql/src/backend/executor/nodeHash.c,v 1.97 2005/11/20 19:49:07 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -621,7 +621,6 @@ ExecHashTableInsert(HashJoinTable hashtable,
memcpy((char *) &hashTuple->htup,
(char *) tuple,
sizeof(hashTuple->htup));
hashTuple->htup.t_datamcxt = hashtable->batchCxt;
hashTuple->htup.t_data = (HeapTupleHeader)
(((char *) hashTuple) + MAXALIGN(sizeof(HashJoinTupleData)));
memcpy((char *) hashTuple->htup.t_data,

3
src/backend/executor/nodeHashjoin.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/executor/nodeHashjoin.c,v 1.75 2005/10/18 01:06:24 tgl Exp $
* $PostgreSQL: pgsql/src/backend/executor/nodeHashjoin.c,v 1.76 2005/11/20 19:49:07 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -789,7 +789,6 @@ ExecHashJoinGetSavedTuple(HashJoinState *hjstate,
errmsg("could not read from hash-join temporary file: %m")));
heapTuple = palloc(HEAPTUPLESIZE + htup.t_len);
memcpy((char *) heapTuple, (char *) &htup, sizeof(HeapTupleData));
heapTuple->t_datamcxt = CurrentMemoryContext;
heapTuple->t_data = (HeapTupleHeader)
((char *) heapTuple + HEAPTUPLESIZE);
nread = BufFileRead(file, (void *) heapTuple->t_data, htup.t_len);

3
src/backend/utils/cache/relcache.c vendored
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.230 2005/10/15 02:49:31 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/cache/relcache.c,v 1.231 2005/11/20 19:49:07 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -2998,7 +2998,6 @@ load_relcache_init_file(void)
goto read_failed;
/* Fix up internal pointers in the tuple -- see heap_copytuple */
rel->rd_indextuple->t_datamcxt = CurrentMemoryContext;
rel->rd_indextuple->t_data = (HeapTupleHeader) ((char *) rel->rd_indextuple + HEAPTUPLESIZE);
rel->rd_index = (Form_pg_index) GETSTRUCT(rel->rd_indextuple);

3
src/backend/utils/sort/tuplesort.c
View File

@ -78,7 +78,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/sort/tuplesort.c,v 1.54 2005/10/25 13:47:08 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/sort/tuplesort.c,v 1.55 2005/11/20 19:49:08 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -2071,7 +2071,6 @@ readtup_heap(Tuplesortstate *state, int tapenum, unsigned int len)
/* reconstruct the HeapTupleData portion */
tuple->t_len = len - sizeof(unsigned int);
ItemPointerSetInvalid(&(tuple->t_self));
tuple->t_datamcxt = CurrentMemoryContext;
tuple->t_data = (HeapTupleHeader) (((char *) tuple) + HEAPTUPLESIZE);
/* read in the tuple proper */
if (LogicalTapeRead(state->tapeset, tapenum, (void *) tuple->t_data,

3
src/backend/utils/sort/tuplestore.c
View File

@ -36,7 +36,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/sort/tuplestore.c,v 1.23 2005/10/15 02:49:37 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/sort/tuplestore.c,v 1.24 2005/11/20 19:49:08 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -707,7 +707,6 @@ readtup_heap(Tuplestorestate *state, unsigned int len)
/* reconstruct the HeapTupleData portion */
tuple->t_len = len - sizeof(unsigned int);
ItemPointerSetInvalid(&(tuple->t_self));
tuple->t_datamcxt = CurrentMemoryContext;
tuple->t_data = (HeapTupleHeader) (((char *) tuple) + HEAPTUPLESIZE);
/* read in the tuple proper */
if (BufFileRead(state->myfile, (void *) tuple->t_data,

19
src/include/access/htup.h
View File

@ -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 1.78 2005/10/15 02:49:42 momjian Exp $
* $PostgreSQL: pgsql/src/include/access/htup.h,v 1.79 2005/11/20 19:49:08 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -361,20 +361,20 @@ do { \
*
* * Pointer to a tuple in a disk buffer: t_data points directly into the
* buffer (which the code had better be holding a pin on, but this is not
* reflected in HeapTupleData itself). t_datamcxt must be NULL.
* reflected in HeapTupleData itself).
*
* * Pointer to nothing: t_data and t_datamcxt are NULL. This is used as
* a failure indication in some functions.
* * Pointer to nothing: t_data is NULL. This is used as a failure indication
* in some functions.
*
* * Part of a palloc'd tuple: the HeapTupleData itself and the tuple
* form a single palloc'd chunk. t_data points to the memory location
* immediately following the HeapTupleData struct (at offset HEAPTUPLESIZE),
* and t_datamcxt is the containing context. This is used as the output
* format of heap_form_tuple and related routines.
* immediately following the HeapTupleData struct (at offset HEAPTUPLESIZE).
* This is the output format of heap_form_tuple and related routines.
*
* * Separately allocated tuple: t_data points to a palloc'd chunk that
* is not adjacent to the HeapTupleData, and t_datamcxt is the context
* containing that chunk.
* is not adjacent to the HeapTupleData. (This case is deprecated since
* it's difficult to tell apart from case #1. It should be used only in
* limited contexts where the code knows that case #1 will never apply.)
*
* t_len should always be valid, except in the pointer-to-nothing case.
* t_self and t_tableOid should be valid if the HeapTupleData points to
@ -386,7 +386,6 @@ typedef struct HeapTupleData
uint32 t_len; /* length of *t_data */
ItemPointerData t_self; /* SelfItemPointer */
Oid t_tableOid; /* table the tuple came from */
MemoryContext t_datamcxt; /* memory context of allocation */
HeapTupleHeader t_data; /* -> tuple header and data */
} HeapTupleData;