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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2007-01-30 01:33:36 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2007-01-30 01:33:36 +0000 |
| commit | a635c08fa10fe545d723bcec6eb73bfdca07e2c0 (patch) | |
| tree | 83ac01972011232d6841e60cd830fe34ac2463d5 /src/include/executor/hashjoin.h | |
| parent | e8cd6f14a26bbecd3d8abcf36235a033cb035678 (diff) | |
| download | postgresql-a635c08fa10fe545d723bcec6eb73bfdca07e2c0.tar.gz postgresql-a635c08fa10fe545d723bcec6eb73bfdca07e2c0.zip | |
Add support for cross-type hashing in hash index searches and hash joins.
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.
Diffstat (limited to 'src/include/executor/hashjoin.h')
| -rw-r--r-- | src/include/executor/hashjoin.h | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/src/include/executor/hashjoin.h b/src/include/executor/hashjoin.h index ba086407679..19cfb1c473b 100644 --- a/src/include/executor/hashjoin.h +++ b/src/include/executor/hashjoin.h @@ -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/executor/hashjoin.h,v 1.43 2007/01/28 23:21:26 tgl Exp $ + * $PostgreSQL: pgsql/src/include/executor/hashjoin.h,v 1.44 2007/01/30 01:33:36 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -102,12 +102,11 @@ typedef struct HashJoinTableData /* * Info about the datatype-specific hash functions for the datatypes being - * hashed. We assume that the inner and outer sides of each hashclause - * are the same type, or at least share the same hash function. This is an - * array of the same length as the number of hash keys. + * hashed. These are arrays of the same length as the number of hash join + * clauses (hash keys). */ - FmgrInfo *hashfunctions; /* lookup data for hash functions */ - + FmgrInfo *outer_hashfunctions; /* lookup data for hash functions */ + FmgrInfo *inner_hashfunctions; /* lookup data for hash functions */ bool *hashStrict; /* is each hash join operator strict? */ Size spaceUsed; /* memory space currently used by tuples */ |