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

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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
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13
src/backend/executor/execGrouping.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/executor/execGrouping.c,v 1.23 2007/01/10 18:06:02 tgl Exp $
* $PostgreSQL: pgsql/src/backend/executor/execGrouping.c,v 1.24 2007/01/30 01:33:36 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -224,15 +224,18 @@ execTuplesHashPrepare(int numCols,
{
Oid eq_opr = eqOperators[i];
Oid eq_function;
Oid hash_function;
Oid left_hash_function;
Oid right_hash_function;
eq_function = get_opcode(eq_opr);
hash_function = get_op_hash_function(eq_opr);
if (!OidIsValid(hash_function)) /* should not happen */
if (!get_op_hash_functions(eq_opr,
&left_hash_function, &right_hash_function))
elog(ERROR, "could not find hash function for hash operator %u",
eq_opr);
/* For the moment, we're not supporting cross-type cases here */
Assert(left_hash_function == right_hash_function);
fmgr_info(eq_function, &(*eqFunctions)[i]);
fmgr_info(hash_function, &(*hashFunctions)[i]);
fmgr_info(right_hash_function, &(*hashFunctions)[i]);
}
}