Changeset: 8ebffe516b31 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=8ebffe516b31
Modified Files:
gdk/gdk_group.c
Branch: Jul2017
Log Message:
Refining from a single group is the same as not refining.
diffs (23 lines):
diff --git a/gdk/gdk_group.c b/gdk/gdk_group.c
--- a/gdk/gdk_group.c
+++ b/gdk/gdk_group.c
@@ -708,7 +708,8 @@ BATgroup_internal(BAT **groups, BAT **ex
}
ngrp = 0;
BATsetcount(gn, cnt);
- if (g)
+ /* don't bother looking at old groups if there is only one */
+ if (g && (!BATordered(g) || !BATordered_rev(g)))
grps = (const oid *) Tloc(g, 0);
/* figure out if we can use the storage type also for
@@ -790,7 +791,8 @@ BATgroup_internal(BAT **groups, BAT **ex
BUN i, j;
BUN *pgrp;
- assert(g); /* if g == NULL, we used the code above */
+ assert(g); /* if g == NULL or if there is a single */
+ assert(grps); /* group, we used the code above */
/* for each value, we need to scan all previous equal
* values (a consecutive, possibly empty, range) to
* see if we can find one in the same old group
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