database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-10-27 00:12:01 +03:00
Code Activity

Add support for cross-type hashing in hash index searches and hash joins.

Browse Source 
Hashing for aggregation purposes still needs work, so it's not time to
mark any cross-type operators as hashable for general use, but these cases
work if the operators are so marked by hand in the system catalogs.
This commit is contained in:
Tom Lane
2007-01-30 01:33:36 +00:00
parent e8cd6f14a2
commit a635c08fa1
12 changed files with 240 additions and 82 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
src/include/access/hash.h
View File

@@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/hash.h,v 1.75 2007/01/20 18:43:35 neilc Exp $
* $PostgreSQL: pgsql/src/include/access/hash.h,v 1.76 2007/01/30 01:33:36 tgl Exp $
*
* NOTES
* modeled after Margo Seltzer's hash implementation for unix.
@@ -308,6 +308,7 @@ extern bool _hash_step(IndexScanDesc scan, Buffer *bufP, ScanDirection dir);
/* hashutil.c */
extern bool _hash_checkqual(IndexScanDesc scan, IndexTuple itup);
extern uint32 _hash_datum2hashkey(Relation rel, Datum key);
extern uint32 _hash_datum2hashkey_type(Relation rel, Datum key, Oid keytype);
extern Bucket _hash_hashkey2bucket(uint32 hashkey, uint32 maxbucket,
uint32 highmask, uint32 lowmask);
extern uint32 _hash_log2(uint32 num);