zstan commented on code in PR #13311:
URL: https://github.com/apache/ignite/pull/13311#discussion_r3712567201


##########
modules/calcite/src/main/java/org/apache/ignite/internal/processors/query/calcite/exec/rel/AbstractNode.java:
##########
@@ -37,6 +37,9 @@
  * Abstract node of execution tree.
  */
 public abstract class AbstractNode<Row> implements Node<Row> {
+    /** Special value to highlight that all rows were received and we do not 
expect more. */
+    static final int NOT_WAITING = -1;

Review Comment:
   No, it shouldn\`t, cause it abstract, look this is not main goal of this 
issue, if you think that some constants need to be aligned - fill an issue and 
we align them



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