Add note about left semi and left anti joins

apache · Mar 14, 2024 · 895160b · 895160b
1 parent c95659c
commit 895160b
Showing 1 changed file with 7 additions and 0 deletions.
diff --git a/spark/src/test/scala/org/apache/comet/exec/CometExecSuite.scala b/spark/src/test/scala/org/apache/comet/exec/CometExecSuite.scala
@@ -100,6 +100,13 @@ class CometExecSuite extends CometTestBase {
           //
           // Full join: build right
           // sql("SELECT /*+ SHUFFLE_HASH(tbl_b) */ * FROM tbl_a FULL JOIN tbl_b ON tbl_a._2 = tbl_b._1")
+          //
+          // val left = sql("SELECT * FROM tbl_a")
+          // val right = sql("SELECT * FROM tbl_b")
+          //
+          // Left semi and anti joins are only supported with build right in Spark.
+          // left.join(right, left("_2") === right("_1"), "leftsemi")
+          // left.join(right, left("_2") === right("_1"), "leftanti")
         }
       }
     }