diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2001-07-15 22:48:19 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2001-07-15 22:48:19 +0000 |
| commit | c8076f09d2eb82a28f27f97230be470fffe7a1e0 (patch) | |
| tree | 1e357e7e28313386f9d2e789d3905b37ce2d58f6 /src/include/access/hash.h | |
| parent | 997439f59e1d487cb2bfa1384f6479fda0c4dd4c (diff) | |
| download | postgresql-c8076f09d2eb82a28f27f97230be470fffe7a1e0.tar.gz | |
Restructure index AM interface for index building and index tuple deletion,
per previous discussion on pghackers. Most of the duplicate code in
different AMs' ambuild routines has been moved out to a common routine
in index.c; this means that all index types now do the right things about
inserting recently-dead tuples, etc. (I also removed support for EXTEND
INDEX in the ambuild routines, since that's about to go away anyway, and
it cluttered the code a lot.) The retail indextuple deletion routines have
been replaced by a "bulk delete" routine in which the indexscan is inside
the access method. I haven't pushed this change as far as it should go yet,
but it should allow considerable simplification of the internal bookkeeping
for deletions. Also, add flag columns to pg_am to eliminate various
hardcoded tests on AM OIDs, and remove unused pg_am columns.
Fix rtree and gist index types to not attempt to store NULLs; before this,
gist usually crashed, while rtree managed not to crash but computed wacko
bounding boxes for NULL entries (which might have had something to do with
the performance problems we've heard about occasionally).
Add AtEOXact routines to hash, rtree, and gist, all of which have static
state that needs to be reset after an error. We discovered this need long
ago for btree, but missed the other guys.
Oh, one more thing: concurrent VACUUM is now the default.
Diffstat (limited to 'src/include/access/hash.h')
| -rw-r--r-- | src/include/access/hash.h | 17 |
1 files changed, 4 insertions, 13 deletions
diff --git a/src/include/access/hash.h b/src/include/access/hash.h index 871629a122..e973b81a7c 100644 --- a/src/include/access/hash.h +++ b/src/include/access/hash.h @@ -7,7 +7,7 @@ * Portions Copyright (c) 1996-2001, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * - * $Id: hash.h,v 1.38 2001/03/22 04:00:27 momjian Exp $ + * $Id: hash.h,v 1.39 2001/07/15 22:48:18 tgl Exp $ * * NOTES * modeled after Margo Seltzer's hash implementation for unix. @@ -55,7 +55,7 @@ typedef uint32 PageOffset; #define OADDR_OF(S,O) ((OverflowPageAddress)((uint32)((uint32)(S) << SPLITSHIFT) + (O))) #define BUCKET_TO_BLKNO(B) \ - ((Bucket) ((B) + ((B) ? metap->SPARES[_hash_log2((B)+1)-1] : 0)) + 1) + ((Bucket) ((B) + ((B) ? metap->hashm_spares[_hash_log2((B)+1)-1] : 0)) + 1) #define OADDR_TO_BLKNO(B) \ ((BlockNumber) \ (BUCKET_TO_BLKNO ( (1 << SPLITNUM((B))) -1 ) + OPAGENUM((B)))); @@ -165,16 +165,6 @@ typedef struct HashMetaPageData typedef HashMetaPageData *HashMetaPage; -/* Short hands for accessing structure */ -#define OVFL_POINT hashm_ovflpoint -#define LAST_FREED hashm_lastfreed -#define MAX_BUCKET hashm_maxbucket -#define FFACTOR hashm_ffactor -#define HIGH_MASK hashm_highmask -#define LOW_MASK hashm_lowmask -#define NKEYS hashm_nkeys -#define SPARES hashm_spares - extern bool BuildingHash; typedef struct HashItemData @@ -256,7 +246,7 @@ extern Datum hashrescan(PG_FUNCTION_ARGS); extern Datum hashendscan(PG_FUNCTION_ARGS); extern Datum hashmarkpos(PG_FUNCTION_ARGS); extern Datum hashrestrpos(PG_FUNCTION_ARGS); -extern Datum hashdelete(PG_FUNCTION_ARGS); +extern Datum hashbulkdelete(PG_FUNCTION_ARGS); /* * Datatype-specific hash functions in hashfunc.c. @@ -310,6 +300,7 @@ extern void _hash_expandtable(Relation rel, Buffer metabuf); extern void _hash_regscan(IndexScanDesc scan); extern void _hash_dropscan(IndexScanDesc scan); extern void _hash_adjscans(Relation rel, ItemPointer tid); +extern void AtEOXact_hash(void); /* hashsearch.c */ |