empty blueprint must create empty filter iterator

2 files changed, 8 insertions, 3 deletions

diff --git a/searchlib/src/vespa/searchlib/queryeval/leaf_blueprints.cpp b/searchlib/src/vespa/searchlib/queryeval/leaf_blueprints.cpp
index e605f36c87f..fac6290d3f8 100644
--- a/searchlib/src/vespa/searchlib/queryeval/leaf_blueprints.cpp
+++ b/searchlib/src/vespa/searchlib/queryeval/leaf_blueprints.cpp
@@ -16,6 +16,12 @@ EmptyBlueprint::createLeafSearch(const search::fef::TermFieldMatchDataArray &,
     return std::make_unique<EmptySearch>();
 }
 
+SearchIterator::UP
+EmptyBlueprint::createFilterSearch(bool /*strict*/, FilterConstraint /* constraint */) const
+{
+    return std::make_unique<EmptySearch>();
+}
+
 EmptyBlueprint::EmptyBlueprint(const FieldSpecBase &field)
     : SimpleLeafBlueprint(field)
 {
diff --git a/searchlib/src/vespa/searchlib/queryeval/leaf_blueprints.h b/searchlib/src/vespa/searchlib/queryeval/leaf_blueprints.h
index b99be4a9353..d2e86ac65a4 100644
--- a/searchlib/src/vespa/searchlib/queryeval/leaf_blueprints.h
+++ b/searchlib/src/vespa/searchlib/queryeval/leaf_blueprints.h
@@ -14,9 +14,8 @@ namespace search::queryeval {
 class EmptyBlueprint : public SimpleLeafBlueprint
 {
 protected:
-    SearchIterator::UP
-    createLeafSearch(const search::fef::TermFieldMatchDataArray &tfmda, bool strict) const override;
-
+    SearchIterator::UP createLeafSearch(const search::fef::TermFieldMatchDataArray &tfmda, bool strict) const override;
+    SearchIterator::UP createFilterSearch(bool strict, FilterConstraint constraint) const override;
 public:
     EmptyBlueprint(const FieldSpecBaseList &fields);
     EmptyBlueprint(const FieldSpecBase &field);