minor

h2/src/main/org/h2/command/Parser.java

@@ -2240,6 +2240,9 @@ public class Parser {
                 } else {
                     if (isSelect()) {
                         Query query = parseSelect();
+                        // can not be lazy because we have to call
+                        // method ResultInterface.containsDistinct
+                        // which is not supported for lazy execution
                         query.setNeverLazy(true);
                         r = new ConditionInSelect(database, r, query, false,
                                 Comparison.EQUAL);