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Commit65c2d42

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Preliminary cleanup for hash index code (doesn't attack the locking problem
yet). Fix a couple of bugs that would only appear if multiple bitmap pagesare used, including a buffer reference leak and incorrect computation of bitindexes. Get rid of 'overflow address' concept, which accomplished nothingexcept obfuscating the code and creating a risk of failure due to limitedrange of offset field. Rename some misleadingly-named fields and routines,and improve documentation.
1 parenteaeb862 commit65c2d42

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4 files changed

+364
-450
lines changed

4 files changed

+364
-450
lines changed

‎src/backend/access/hash/hashinsert.c‎

Lines changed: 6 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
*
1010
* IDENTIFICATION
11-
* $Header: /cvsroot/pgsql/src/backend/access/hash/hashinsert.c,v 1.27 2003/08/04 02:39:57 momjian Exp $
11+
* $Header: /cvsroot/pgsql/src/backend/access/hash/hashinsert.c,v 1.28 2003/09/01 20:26:34 tgl Exp $
1212
*
1313
*-------------------------------------------------------------------------
1414
*/
@@ -155,7 +155,7 @@ _hash_insertonpg(Relation rel,
155155
* page with enough room. allocate a new overflow page.
156156
*/
157157
do_expand= true;
158-
ovflbuf=_hash_addovflpage(rel,&metabuf,buf);
158+
ovflbuf=_hash_addovflpage(rel,metabuf,buf);
159159
_hash_relbuf(rel,buf,HASH_WRITE);
160160
buf=ovflbuf;
161161
page=BufferGetPage(buf);
@@ -186,18 +186,15 @@ _hash_insertonpg(Relation rel,
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* access type just for a moment to allow greater accessibility to
187187
* the metapage.
188188
*/
189-
metap= (HashMetaPage)_hash_chgbufaccess(rel,&metabuf,
190-
HASH_READ,HASH_WRITE);
191-
metap->hashm_nkeys+=1;
192-
metap= (HashMetaPage)_hash_chgbufaccess(rel,&metabuf,
193-
HASH_WRITE,HASH_READ);
194-
189+
_hash_chgbufaccess(rel,metabuf,HASH_READ,HASH_WRITE);
190+
metap->hashm_ntuples+=1;
191+
_hash_chgbufaccess(rel,metabuf,HASH_WRITE,HASH_READ);
195192
}
196193

197194
_hash_wrtbuf(rel,buf);
198195

199196
if (do_expand||
200-
(metap->hashm_nkeys / (metap->hashm_maxbucket+1))
197+
(metap->hashm_ntuples / (metap->hashm_maxbucket+1))
201198
>metap->hashm_ffactor)
202199
_hash_expandtable(rel,metabuf);
203200
_hash_relbuf(rel,metabuf,HASH_READ);

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