Changeset: a66ed42d117d for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/a66ed42d117d
Modified Files:
sql/backends/monet5/bin_partition_by_slice.c
Branch: default
Log Message:
no need for 2phases on large hash tables
diffs (12 lines):
diff --git a/sql/backends/monet5/bin_partition_by_slice.c
b/sql/backends/monet5/bin_partition_by_slice.c
--- a/sql/backends/monet5/bin_partition_by_slice.c
+++ b/sql/backends/monet5/bin_partition_by_slice.c
@@ -109,6 +109,8 @@ rel_groupby_2_phases(mvc *sql, sql_rel *
lng lcard = exp_getcard(sql, rel, e);
if (lcard == cnt) {
card = cnt;
+ if (card > 64*1024) /* TODO add tunable */
+ return false;
break;
}
card *= lcard; /* TODO check for overflow */
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