MonetDB: properties - Global aggregates may return NULL

[Pedro Ferreira]

Changeset: 025a1e86d2f2 for MonetDB
URL: https://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=025a1e86d2f2
Modified Files:
        sql/server/rel_statistics.c
Branch: properties
Log Message:

Global aggregates may return NULL


diffs (13 lines):

diff --git a/sql/server/rel_statistics.c b/sql/server/rel_statistics.c
--- a/sql/server/rel_statistics.c
+++ b/sql/server/rel_statistics.c
@@ -350,7 +350,8 @@ rel_propagate_statistics(visitor *v, sql
                        if (look)
                                look(sql, e);
                }
-               if (!e->semantics && e->l && !have_nil(e->l))
+               assert(e->type == e_func || is_groupby(rel->op));
+               if (!e->semantics && e->l && !have_nil(e->l) && (e->type != 
e_aggr || list_length(rel->r)))
                        set_has_no_nil(e);
        } break;
        case e_atom: {
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