Unit test that struct field with index and exact match gives expected

log warning.

2 files changed, 30 insertions, 0 deletions

diff --git a/config-model/src/main/java/com/yahoo/schema/processing/TypedTransformProvider.java b/config-model/src/main/java/com/yahoo/schema/processing/TypedTransformProvider.java
index 8ccc8870419..3d4934ed841 100644
--- a/config-model/src/main/java/com/yahoo/schema/processing/TypedTransformProvider.java
+++ b/config-model/src/main/java/com/yahoo/schema/processing/TypedTransformProvider.java
@@ -29,6 +29,10 @@ public abstract class TypedTransformProvider extends ValueTransformProvider {
     protected final boolean requiresTransform(Expression exp) {
         if (exp instanceof OutputExpression) {
             String fieldName = ((OutputExpression)exp).getFieldName();
+            if (fieldName == null) {
+                // Incomplete output expressions never require a transform.
+                return false;
+            }
             if (exp instanceof AttributeExpression) {
                 Attribute attribute = schema.getAttribute(fieldName);
                 if (attribute == null)
diff --git a/config-model/src/test/java/com/yahoo/vespa/model/application/validation/ComplexFieldsValidatorTestCase.java b/config-model/src/test/java/com/yahoo/vespa/model/application/validation/ComplexFieldsValidatorTestCase.java
index ae1db366c9f..2e51a425f6d 100644
--- a/config-model/src/test/java/com/yahoo/vespa/model/application/validation/ComplexFieldsValidatorTestCase.java
+++ b/config-model/src/test/java/com/yahoo/vespa/model/application/validation/ComplexFieldsValidatorTestCase.java
@@ -143,6 +143,32 @@ public class ComplexFieldsValidatorTestCase {
     }
 
     @Test
+    void logs_warning_when_complex_fields_have_struct_fields_with_index_and_exact_match() throws IOException, SAXException {
+        var logger = new MyLogger();
+        createModelAndValidate(joinLines(
+                "schema test {",
+                "  document test {",
+                "    field nesteds type array<nested> {",
+                "      struct-field foo {",
+                "        indexing: attribute | index",
+                "        match {",
+                "          exact",
+                "          exact-terminator: '@@'",
+                "        }",
+                "      }",
+                "    }",
+                "    struct nested {",
+                "      field foo type string {}",
+                "    }",
+                "  }",
+                "}"), logger);
+        assertTrue(logger.message.toString().contains("For cluster 'mycluster', schema 'test': " +
+                "The following complex fields have struct fields with 'indexing: index' which is " +
+                "not supported and has no effect: nesteds (nesteds.foo). " +
+                "Remove setting or change to 'indexing: attribute' if needed for matching."));
+    }
+
+    @Test
     void validation_passes_when_only_supported_struct_field_attributes_are_used() throws IOException, SAXException {
         createModelAndValidate(joinLines("search test {",
                 "  document test {",