diff options
| author | Tom Lane | 2004-05-08 19:09:25 +0000 |
|---|---|---|
| committer | Tom Lane | 2004-05-08 19:09:25 +0000 |
| commit | 4af3421161ce7847a019ec0799c898586574801f (patch) | |
| tree | 3ec8744681ef2d3e03b4479a677151a15a68b3f1 /src/include/access | |
| parent | 1fe11fad543fcaaf9ae7826f1234530a9d59c1b0 (diff) | |
Get rid of rd_nblocks field in relcache entries. Turns out this was
costing us lots more to maintain than it was worth. On shared tables
it was of exactly zero benefit because we couldn't trust it to be
up to date. On temp tables it sometimes saved an lseek, but not often
enough to be worth getting excited about. And the real problem was that
we forced an lseek on every relcache flush in order to update the field.
So all in all it seems best to lose the complexity.
Diffstat (limited to 'src/include/access')
| -rw-r--r-- | src/include/access/relscan.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/src/include/access/relscan.h b/src/include/access/relscan.h index 746b795b26e..b6ca7e43a62 100644 --- a/src/include/access/relscan.h +++ b/src/include/access/relscan.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $PostgreSQL: pgsql/src/include/access/relscan.h,v 1.34 2003/11/29 22:40:55 pgsql Exp $ + * $PostgreSQL: pgsql/src/include/access/relscan.h,v 1.35 2004/05/08 19:09:25 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -25,6 +25,7 @@ typedef struct HeapScanDescData Snapshot rs_snapshot; /* snapshot to see */ int rs_nkeys; /* number of scan keys */ ScanKey rs_key; /* array of scan key descriptors */ + BlockNumber rs_nblocks; /* number of blocks to scan */ /* scan current state */ HeapTupleData rs_ctup; /* current tuple in scan, if any */ |