stub in abstract methods

Author: not-napoleon

x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/expression/MetadataAttribute.java

@@ -120,6 +120,11 @@ protected String label() {
         return "m";
     }
 
+    @Override
+    public boolean isDimension() {
+        return false;
+    }
+
     @Override
     protected NodeInfo<? extends Expression> info() {
         return NodeInfo.create(this, MetadataAttribute::new, name(), dataType(), nullable(), id(), synthetic(), searchable);

x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/expression/ReferenceAttribute.java

@@ -117,4 +117,9 @@ protected NodeInfo<ReferenceAttribute> info() {
     protected String label() {
         return "r";
     }
+
+    @Override
+    public boolean isDimension() {
+        return false;
+    }
 }

x-pack/plugin/esql-core/src/main/java/org/elasticsearch/xpack/esql/core/expression/UnresolvedAttribute.java

@@ -98,6 +98,11 @@ protected String label() {
         return UNRESOLVED_PREFIX;
     }
 
+    @Override
+    public boolean isDimension() {
+        return false;
+    }
+
     @Override
     public String nodeString() {
         return toString();