Forgot that I had intended to replace division by masking in hash calculation.

diff --git a/src/backend/executor/nodeHash.c b/src/backend/executor/nodeHash.c
index c85755890a6014df0780d4fa0aef15228b3009b1..ded952a43e51fcf13dce86f47429895b37a55d06 100644 (file)
--- a/src/backend/executor/nodeHash.c
+++ b/src/backend/executor/nodeHash.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/executor/nodeHash.c,v 1.89 2005/03/06 22:15:04 tgl Exp $
+ *   $PostgreSQL: pgsql/src/backend/executor/nodeHash.c,v 1.90 2005/03/13 19:59:40 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -709,7 +709,8 @@ ExecHashGetBucketAndBatch(HashJoinTable hashtable,
    if (nbatch > 1)
    {
        *bucketno = hashvalue % nbuckets;
-       *batchno = (hashvalue / nbuckets) % nbatch;
+       /* since nbatch is a power of 2, can do MOD by masking */
+       *batchno = (hashvalue / nbuckets) & (nbatch - 1);
    }
    else
    {