Changeset: 98cdca21a670 for MonetDB
URL: http://dev.monetdb.org/hg/MonetDB?cmd=changeset;node=98cdca21a670
Modified Files:
sql/server/rel_exp.c
sql/server/rel_optimizer.c
Branch: Jul2015
Log Message:
fix bug 3890, ie incorrect rewrite of rank over expressions. 'Should not be
propagated to the default branch'
diffs (24 lines):
diff --git a/sql/server/rel_exp.c b/sql/server/rel_exp.c
--- a/sql/server/rel_exp.c
+++ b/sql/server/rel_exp.c
@@ -1292,6 +1292,8 @@ exp_unsafe( sql_exp *e)
return 1;
}
}
+ if (e->type == e_func && e->r) /* rank and friends are unsafe */
+ return 1;
return 0;
}
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
@@ -1967,6 +1967,8 @@ exp_push_down_prj(mvc *sql, sql_exp *e,
list *l = e->l, *nl = NULL;
sql_exp *ne = NULL;
+ if (e->type == e_func && exp_unsafe(e))
+ return NULL;
if (!l) {
return e;
} else {
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