Changeset: 076b55538ce6 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB/rev/076b55538ce6
Modified Files:
gdk/gdk_firstn.c
monetdb5/modules/kernel/algebra.c
Branch: Jun2023
Log Message:
If N(comes from limit) >= cnt, lastp is setted to BUN cnt - 1 and not 0.
diffs (27 lines):
diff --git a/gdk/gdk_firstn.c b/gdk/gdk_firstn.c
--- a/gdk/gdk_firstn.c
+++ b/gdk/gdk_firstn.c
@@ -227,9 +227,9 @@ BATfirstn_unique(BATiter *bi, BAT *s, BU
if (n >= cnt) {
/* trivial: return all candidates */
- if (lastp)
- *lastp = 0;
bn = canditer_slice(&ci, 0, ci.ncand);
+ if (bn && lastp)
+ *lastp = BUNtoid(bn, cnt - 1);
TRC_DEBUG(ALGO, "b=" ALGOBATFMT ",s=" ALGOOPTBATFMT
",n=" BUNFMT " -> " ALGOOPTBATFMT
" (trivial -- " LLFMT " usec)\n",
diff --git a/monetdb5/modules/kernel/algebra.c
b/monetdb5/modules/kernel/algebra.c
--- a/monetdb5/modules/kernel/algebra.c
+++ b/monetdb5/modules/kernel/algebra.c
@@ -683,7 +683,7 @@ ALGfirstn(Client cntxt, MalBlkPtr mb, Ma
bat *ret1, *ret2 = NULL;
bat bid, sid, gid;
BAT *b, *s = NULL, *g = NULL;
- BAT *bn, *gn;
+ BAT *bn = NULL, *gn = NULL;
lng n;
bit asc, nilslast, distinct;
gdk_return rc;
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