Changeset: 802c51349bce for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/802c51349bce
Modified Files:
gdk/gdk_firstn.c
Branch: Jun2023
Log Message:
Skip select if it's not needed.
diffs (21 lines):
diff --git a/gdk/gdk_firstn.c b/gdk/gdk_firstn.c
--- a/gdk/gdk_firstn.c
+++ b/gdk/gdk_firstn.c
@@ -229,7 +229,7 @@ BATfirstn_unique(BATiter *bi, BAT *s, BU
/* trivial: return all candidates */
bn = canditer_slice(&ci, 0, ci.ncand);
if (bn && lastp)
- *lastp = BUNtoid(bn, cnt - 1);
+ *lastp = oid_nil;
TRC_DEBUG(ALGO, "b=" ALGOBATFMT ",s=" ALGOOPTBATFMT
",n=" BUNFMT " -> " ALGOOPTBATFMT
" (trivial -- " LLFMT " usec)\n",
@@ -1061,7 +1061,7 @@ BATfirstn_grouped(BAT **topn, BAT **gids
BBPunfix(bn1->batCacheid);
if (bn == NULL)
return GDK_FAIL;
- } else {
+ } else if (last != oid_nil) {
BAT *bn1, *bn2;
bn1 = bn;
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