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| author | Bruce Momjian <bruce@momjian.us> | 1999-05-17 06:38:41 +0000 |
|---|---|---|
| committer | Bruce Momjian <bruce@momjian.us> | 1999-05-17 06:38:41 +0000 |
| commit | 184dd28d5c2c8067d2336398a03f04a8b989e52e (patch) | |
| tree | 90d51a5b57794ffca9484fafc7b72333669a8c8e /src | |
| parent | 1125c5e4c5882f02b4152b2993bc9add4849ea7e (diff) | |
| download | postgresql-184dd28d5c2c8067d2336398a03f04a8b989e52e.tar.gz postgresql-184dd28d5c2c8067d2336398a03f04a8b989e52e.zip | |
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
Diffstat (limited to 'src')
| -rw-r--r-- | src/backend/storage/smgr/md.c | 27 |
1 files changed, 19 insertions, 8 deletions
diff --git a/src/backend/storage/smgr/md.c b/src/backend/storage/smgr/md.c index 8d7e4c864b1..84fd67510dc 100644 --- a/src/backend/storage/smgr/md.c +++ b/src/backend/storage/smgr/md.c @@ -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); |