+---+
| tt|
+---+
|  a|
|  b|
|  c|
| ab|
+---+

+----+-----+------+
|name|alter|profit|
+----+-----+------+
|   a|   aa|     1|
|   b|    a|     5|
|   c|   ab|     8|
+----+-----+------+

dataDF = dataDF.select("*")
      .join(broadcast(alterDF),
       col("tt") === col("Name") || col("tt") === col("alter"),
        "left")

+---+----+-----+------+
| tt|name|alter|profit|
+---+----+-----+------+
|  a|   a|   aa|     1|
|  a|   b|    a|     5|   // this row is not expected.
|  b|   b|    a|     5|
|  c|   c|   ab|     8|
| ab|   c|   ab|     8|
+---+----+-----+------+