MonetDB: default - protect against nil/null in exp_range_overlap

[Niels Nes]

Changeset: 2dd2f541f9b1 for MonetDB
URL: http://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=2dd2f541f9b1
Modified Files:
        sql/server/rel_optimizer.c
Branch: default
Log Message:

protect against nil/null in exp_range_overlap


diffs (16 lines):

diff --git a/sql/server/rel_optimizer.c b/sql/server/rel_optimizer.c
--- a/sql/server/rel_optimizer.c
+++ b/sql/server/rel_optimizer.c
@@ -6868,6 +6868,12 @@ exp_range_overlap( mvc *sql, sql_exp *e,
 
        if (!min || !max || !emin || !emax)
                return 0;
+
+       if (strcmp("nil", (char*)min) == 0)
+               return 0;
+       if (strcmp("nil", (char*)max) == 0)
+               return 0;
+
        if (t->type->localtype == TYPE_dbl) {
                atom *cmin = atom_general(sql->sa, t, min);
                atom *cmax = atom_general(sql->sa, t, max);
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