Change the description

apache · Sep 16, 2023 · 3ded35f · 3ded35f
1 parent 68ccac1
commit 3ded35f
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Showing 2 changed files with 4 additions and 1 deletion.
diff --git a/core/src/main/java/org/apache/calcite/rel/rules/CoreRules.java b/core/src/main/java/org/apache/calcite/rel/rules/CoreRules.java
@@ -705,7 +705,8 @@ private CoreRules() {}
   public static final SortJoinCopyRule SORT_JOIN_COPY =
       SortJoinCopyRule.Config.DEFAULT.toRule();
 
-  /** Rule that removes a {@link Sort} if its input is already sorted. */
+  /** Rule that removes a {@link Sort} if its input is already sorted.
+   * If {@code sort} input max row cnt is 1,we could also remove the {@code sort}*/
   public static final SortRemoveRule SORT_REMOVE =
       SortRemoveRule.Config.DEFAULT.toRule();
 

diff --git a/core/src/main/java/org/apache/calcite/rel/rules/SortRemoveRule.java b/core/src/main/java/org/apache/calcite/rel/rules/SortRemoveRule.java
@@ -31,6 +31,8 @@
  * Planner rule that removes
  * a {@link org.apache.calcite.rel.core.Sort} if its input is already sorted.
  *
+ * <p> If {@code sort} input max row cnt is 1,we could also remove the {@code sort}
+ *
  * <p>Requires {@link RelCollationTraitDef}.
  *
  * @see CoreRules#SORT_REMOVE