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Fix portability problems recently exposed by regression tests on Alphas.

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1. Distinguish cases where a Datum representing a tuple datatype is an OID
from cases where it is a pointer to TupleTableSlot, and make sure we use
the right typlen in each case.
2. Make fetchatt() and related code support 8-byte by-value datatypes on
machines where Datum is 8 bytes.  Centralize knowledge of the available
by-value datatype sizes in two macros in tupmacs.h, so that this will be
easier if we ever have to do it again.
This commit is contained in:
Tom Lane
2000-12-27 23:59:14 +00:00
parent 97799fc475
commit 8609d4abf2
23 changed files with 497 additions and 660 deletions
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25
src/backend/utils/cache/lsyscache.c vendored
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/cache/lsyscache.c,v 1.48 2000/11/20 20:36:49 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/cache/lsyscache.c,v 1.49 2000/12/27 23:59:12 tgl Exp $
*
* NOTES
* Eventually, the index information should go through here, too.
@ -15,6 +15,7 @@
*/
#include "postgres.h"
#include "access/tupmacs.h"
#include "catalog/pg_operator.h"
#include "catalog/pg_proc.h"
#include "catalog/pg_type.h"
@ -807,28 +808,8 @@ get_typdefault(Oid typid)
if (typByVal)
{
int8 i8;
int16 i16;
int32 i32 = 0;
if (dataSize == typLen)
{
switch (typLen)
{
case sizeof(int8):
memcpy((char *) &i8, VARDATA(typDefault), sizeof(int8));
i32 = i8;
break;
case sizeof(int16):
memcpy((char *) &i16, VARDATA(typDefault), sizeof(int16));
i32 = i16;
break;
case sizeof(int32):
memcpy((char *) &i32, VARDATA(typDefault), sizeof(int32));
break;
}
returnValue = Int32GetDatum(i32);
}
returnValue = fetch_att(VARDATA(typDefault), typByVal, typLen);
else
returnValue = PointerGetDatum(NULL);
}