Revise hash join and hash aggregation code to use the same datatype-

specific hash functions used by hash indexes, rather than the old
not-datatype-aware ComputeHashFunc routine.  This makes it safe to do
hash joining on several datatypes that previously couldn't use hashing.
The sets of datatypes that are hash indexable and hash joinable are now
exactly the same, whereas before each had some that weren't in the other.

1 files changed, 7 insertions, 2 deletions

diff --git a/src/include/executor/executor.h b/src/include/executor/executor.h
index 707b8c9fa6..04e630451f 100644
--- a/src/include/executor/executor.h
+++ b/src/include/executor/executor.h
@@ -7,7 +7,7 @@
  * Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: executor.h,v 1.94 2003/05/06 20:26:28 tgl Exp $
+ * $Id: executor.h,v 1.95 2003/06/22 22:04:55 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -57,9 +57,14 @@ extern bool execTuplesUnequal(HeapTuple tuple1,
 extern FmgrInfo *execTuplesMatchPrepare(TupleDesc tupdesc,
 					   int numCols,
 					   AttrNumber *matchColIdx);
-extern uint32 ComputeHashFunc(Datum key, int typLen, bool byVal);
+extern void execTuplesHashPrepare(TupleDesc tupdesc,
+								  int numCols,
+								  AttrNumber *matchColIdx,
+								  FmgrInfo **eqfunctions,
+								  FmgrInfo **hashfunctions);
 extern TupleHashTable BuildTupleHashTable(int numCols, AttrNumber *keyColIdx,
 										  FmgrInfo *eqfunctions,
+										  FmgrInfo *hashfunctions,
 										  int nbuckets, Size entrysize,
 										  MemoryContext tablecxt,
 										  MemoryContext tempcxt);