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Good Bye, Time Travel!
This commit is contained in:
Vadim B. Mikheev
@ -8,7 +8,7 @@
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*
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*
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* IDENTIFICATION
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* $Header: /cvsroot/pgsql/src/backend/access/common/heaptuple.c,v 1.27 1997/09/24 17:44:24 thomas Exp $
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* $Header: /cvsroot/pgsql/src/backend/access/common/heaptuple.c,v 1.28 1997/11/02 15:24:09 vadim Exp $
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*
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* NOTES
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* The old interface functions have been converted to macros
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@ -115,7 +115,7 @@ DataFill(char *data,
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TupleDesc tupleDesc,
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Datum value[],
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char nulls[],
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char *infomask,
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uint16 *infomask,
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bits8 *bit)
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{
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bits8 *bitP = 0;
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@ -246,11 +246,6 @@ heap_attisnull(HeapTuple tup, int attnum)
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case MinCommandIdAttributeNumber:
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case MaxTransactionIdAttributeNumber:
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case MaxCommandIdAttributeNumber:
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case ChainItemPointerAttributeNumber:
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case AnchorItemPointerAttributeNumber:
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case MinAbsoluteTimeAttributeNumber:
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case MaxAbsoluteTimeAttributeNumber:
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case VersionTypeAttributeNumber:
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break;
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case 0:
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@ -293,18 +288,6 @@ heap_sysattrlen(AttrNumber attno)
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return sizeof f->t_xmax;
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case MaxCommandIdAttributeNumber:
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return sizeof f->t_cmax;
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case ChainItemPointerAttributeNumber:
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return sizeof f->t_chain;
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case MinAbsoluteTimeAttributeNumber:
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return sizeof f->t_tmin;
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case MaxAbsoluteTimeAttributeNumber:
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return sizeof f->t_tmax;
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case VersionTypeAttributeNumber:
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return sizeof f->t_vtype;
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case AnchorItemPointerAttributeNumber:
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elog(WARN, "heap_sysattrlen: field t_anchor does not exist!");
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return 0;
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default:
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elog(WARN, "sysattrlen: System attribute number %d unknown.", attno);
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@ -343,21 +326,6 @@ heap_sysattrbyval(AttrNumber attno)
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case MaxCommandIdAttributeNumber:
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byval = true;
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break;
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case ChainItemPointerAttributeNumber:
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byval = false;
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break;
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case AnchorItemPointerAttributeNumber:
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byval = false;
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break;
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case MinAbsoluteTimeAttributeNumber:
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byval = true;
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break;
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case MaxAbsoluteTimeAttributeNumber:
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byval = true;
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break;
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case VersionTypeAttributeNumber:
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byval = true;
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break;
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default:
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byval = true;
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elog(WARN, "sysattrbyval: System attribute number %d unknown.",
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@ -377,7 +345,7 @@ heap_getsysattr(HeapTuple tup, Buffer b, int attnum)
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{
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switch (attnum)
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{
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case SelfItemPointerAttributeNumber:
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case SelfItemPointerAttributeNumber:
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return ((Datum) &tup->t_ctid);
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case ObjectIdAttributeNumber:
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return ((Datum) (long) tup->t_oid);
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@ -389,38 +357,6 @@ heap_getsysattr(HeapTuple tup, Buffer b, int attnum)
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return ((Datum) (long) tup->t_xmax);
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case MaxCommandIdAttributeNumber:
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return ((Datum) (long) tup->t_cmax);
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case ChainItemPointerAttributeNumber:
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return ((Datum) &tup->t_chain);
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case AnchorItemPointerAttributeNumber:
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elog(WARN, "heap_getsysattr: t_anchor does not exist!");
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break;
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/*
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* For tmin and tmax, we need to do some extra work. These
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* don't get filled in until the vacuum cleaner runs (or we
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* manage to flush a page after setting the value correctly
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* below). If the vacuum cleaner hasn't run yet, then the
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* times stored in the tuple are wrong, and we need to look up
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* the commit time of the transaction. We cache this value in
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* the tuple to avoid doing the work more than once.
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*/
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case MinAbsoluteTimeAttributeNumber:
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if (!AbsoluteTimeIsBackwardCompatiblyValid(tup->t_tmin) &&
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TransactionIdDidCommit(tup->t_xmin))
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tup->t_tmin = TransactionIdGetCommitTime(tup->t_xmin);
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return ((Datum) (long) tup->t_tmin);
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case MaxAbsoluteTimeAttributeNumber:
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if (!AbsoluteTimeIsBackwardCompatiblyReal(tup->t_tmax))
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{
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if (TransactionIdDidCommit(tup->t_xmax))
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tup->t_tmax = TransactionIdGetCommitTime(tup->t_xmax);
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else
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tup->t_tmax = CURRENT_ABSTIME;
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}
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return ((Datum) (long) tup->t_tmax);
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case VersionTypeAttributeNumber:
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return ((Datum) (long) tup->t_vtype);
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default:
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elog(WARN, "heap_getsysattr: undefined attnum %d", attnum);
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}
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@ -858,8 +794,6 @@ heap_formtuple(TupleDesc tupleDescriptor,
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tuple->t_len = len;
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tuple->t_natts = numberOfAttributes;
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tuple->t_hoff = hoff;
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tuple->t_tmin = INVALID_ABSTIME;
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tuple->t_tmax = CURRENT_ABSTIME;
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DataFill((char *) tuple + tuple->t_hoff,
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tupleDescriptor,
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@ -868,6 +802,8 @@ heap_formtuple(TupleDesc tupleDescriptor,
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&tuple->t_infomask,
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(hasnull ? tuple->t_bits : NULL));
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tuple->t_infomask |= HEAP_XMAX_INVALID;
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return (tuple);
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}
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@ -970,9 +906,9 @@ heap_modifytuple(HeapTuple tuple,
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* ----------------
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*/
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infomask = newTuple->t_infomask;
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memmove((char *) &newTuple->t_ctid, /* XXX */
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(char *) &tuple->t_ctid,
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((char *) &tuple->t_hoff - (char *) &tuple->t_ctid)); /* XXX */
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memmove((char *) &newTuple->t_oid, /* XXX */
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(char *) &tuple->t_oid,
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((char *) &tuple->t_hoff - (char *) &tuple->t_oid)); /* XXX */
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newTuple->t_infomask = infomask;
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newTuple->t_natts = numberOfAttributes; /* fix t_natts just in
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* case */
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@ -1013,10 +949,11 @@ heap_addheader(uint32 natts, /* max domain index */
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tup = (HeapTuple) tp;
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MemSet((char *) tup, 0, len);
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tup->t_len = (short) len; /* XXX */
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tup->t_len = len;
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tp += tup->t_hoff = hoff;
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tup->t_natts = natts;
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tup->t_infomask = 0;
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tup->t_infomask |= HEAP_XMAX_INVALID;
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memmove(tp, structure, structlen);
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