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char() cleanup and more cacheoff improvements.

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This commit is contained in:
Bruce Momjian 1998-02-05 03:47:08 +00:00
parent 48ad446c04
commit 0f582cee86
1 changed files with 32 additions and 11 deletions
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43
src/backend/access/common/heaptuple.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/access/common/heaptuple.c,v 1.32 1998/02/04 21:32:08 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/access/common/heaptuple.c,v 1.33 1998/02/05 03:47:08 momjian Exp $
*
* NOTES
* The old interface functions have been converted to macros
@ -400,7 +400,7 @@ nocachegetattr(HeapTuple tup,
bool *isnull)
{
char *tp; /* ptr to att in tuple */
bits8 *bp = NULL; /* ptr to att in tuple */
bits8 *bp = tup->t_bits; /* ptr to att in tuple */
int slow; /* do we have to walk nulls? */
AttributeTupleForm *att = tupleDesc->attrs;
@ -452,7 +452,6 @@ nocachegetattr(HeapTuple tup,
* there's a null somewhere in the tuple
*/
bp = tup->t_bits;
tp = (char *) tup + tup->t_hoff;
slow = 0;
attnum--;
@ -526,7 +525,11 @@ nocachegetattr(HeapTuple tup,
{
register int j = 0;
for (j = 0; j < attnum && !slow; j++)
/*
* In for(), we make this <= and not < because we want to
* test if we can go past it in initializing offsets.
*/
for (j = 0; j <= attnum && !slow; j++)
if (att[j]->attlen < 1 && !VARLENA_FIXED_SIZE(att[j]))
slow = 1;
}
@ -556,7 +559,13 @@ nocachegetattr(HeapTuple tup,
else
off = att[j - 1]->attcacheoff + att[j - 1]->atttypmod;
for (; j < attnum + 1; j++)
for (; j <= attnum ||
/* Can we compute more? We will probably need them */
(j < tup->t_natts &&
att[j]->attcacheoff == -1 &&
(HeapTupleNoNulls(tup) || !att_isnull(j, bp)) &&
(HeapTupleAllFixed(tup)||
att[j]->attlen > 0 || VARLENA_FIXED_SIZE(att[j]))); j++)
{
/*
* Fix me when going to a machine with more than a four-byte
@ -589,13 +598,25 @@ nocachegetattr(HeapTuple tup,
att[j]->attcacheoff = off;
/* The only varlena/-1 length value to get here is this */
if (!VARLENA_FIXED_SIZE(att[j]))
off += att[j]->attlen;
else
switch (att[j]->attlen)
{
Assert(att[j]->atttypmod == VARSIZE(tp + off));
off += att[j]->atttypmod;
case sizeof(char):
off++;
break;
case sizeof(short):
off += sizeof(short);
break;
case sizeof(int32):
off += sizeof(int32);
break;
case -1:
Assert(!VARLENA_FIXED_SIZE(att[j]) ||
att[j]->atttypmod == VARSIZE(tp + off));
off += VARSIZE(tp + off);
break;
default:
off += att[j]->attlen;
break;
}
}