Commit 184dd28d authored by Bruce Momjian's avatar Bruce Momjian

This is actually more of a fundamental problem with mdtruncate. It

looks
like someone just didn't add support for multiple segments for
truncation.

The following patch seems to do the right thing, for me at least.
It passed my tests, my data looks right(no data that shouldn't be in
there) and regression is ok.

Ole Gjerde
parent 1125c5e4
......@@ -7,7 +7,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/storage/smgr/md.c,v 1.42 1999/04/05 22:25:11 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/storage/smgr/md.c,v 1.43 1999/05/17 06:38:41 momjian Exp $
*
*-------------------------------------------------------------------------
*/
......@@ -711,15 +711,26 @@ mdtruncate(Relation reln, int nblocks)
MdfdVec *v;
#ifndef LET_OS_MANAGE_FILESIZE
int curnblk;
int curnblk,
i,
oldsegno,
newsegno;
char fname[NAMEDATALEN];
char tname[NAMEDATALEN + 10];
curnblk = mdnblocks(reln);
if (curnblk / RELSEG_SIZE > 0)
{
elog(NOTICE, "Can't truncate multi-segments relation %s",
reln->rd_rel->relname.data);
return curnblk;
}
oldsegno = curnblk / RELSEG_SIZE;
newsegno = nblocks / RELSEG_SIZE;
StrNCpy(fname, RelationGetRelationName(reln)->data, NAMEDATALEN);
if (newsegno < oldsegno) {
for (i = (newsegno + 1);; i++) {
sprintf(tname, "%s.%d", fname, i);
if (FileNameUnlink(tname) < 0)
break;
}
}
#endif
fd = RelationGetFile(reln);
......
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