Changeset: 98f9241a1823 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/98f9241a1823
Modified Files:
gdk/gdk_select.c
Branch: default
Log Message:
Create a hash on the parent bat (and use it) if it is the same size as the view
and it is persistent.
diffs (17 lines):
diff --git a/gdk/gdk_select.c b/gdk/gdk_select.c
--- a/gdk/gdk_select.c
+++ b/gdk/gdk_select.c
@@ -1333,6 +1333,13 @@ BATselect(BAT *b, BAT *s, const void *tl
(BATcount(tmp) == BATcount(b) ||
BATcount(tmp) / tmp->thash->nheads * (ci.tpe !=
cand_dense ? ilog2(BATcount(s)) : 1) < (s ? BATcount(s) : BATcount(b)) ||
HASHget(tmp->thash, HASHprobe(tmp->thash, tl)) ==
HASHnil(tmp->thash));
+ /* create a hash on the parent bat (and use it) if it is
+ * the same size as the view and it is persistent */
+ if (!phash &&
+ !tmp->batTransient &&
+ BATcount(tmp) == BATcount(b) &&
+ BAThash(tmp) == GDK_SUCCEED)
+ hash = phash = true;
}
/* make sure tsorted and trevsorted flags are set */
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