[GitHub] [calcite] zoudan commented on a diff in pull request #2981: [CALCITE-5283] Add ARG_MIN, ARG_MAX aggregate functions

[GitBox]

zoudan commented on code in PR #2981:
URL: https://github.com/apache/calcite/pull/2981#discussion_r1070765927


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core/src/main/java/org/apache/calcite/runtime/SqlFunctions.java:
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@@ -1849,6 +1849,17 @@ public static <T extends Comparable<T>> T greatest(T b0, 
T b1) {
     return b0 == null || b1 != null && b0.compareTo(b1) < 0 ? b1 : b0;
   }
 
+  /** Less than. */
+  public static <T extends Comparable<T>> boolean lessThan(T b0, T b1) {
+    return b1 == null || b0 != null && b0.compareTo(b1) < 0;
+  }
+
+  /** Grater than. */
+  public static <T extends Comparable<T>> boolean greaterThan(T b0, T b1) {
+    return b1 == null || b0 != null && b0.compareTo(b1) > 0;

Review Comment:
   `greaterThan` return wether b0 is greater than b1 while `greatest` return 
the larger one between b0 and b1



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