擅长:python、mysql、java
<p><strong>尝试以下操作-创建一个无值列并强制转换为数组()</strong></p>
<pre><code>df_b = df_b.withColumn("empty_array", F.when(F.col("rn") == F.lit("1"), (None))).withColumn("empty_array", F.col("empty_array").cast(T.ArrayType(T.StringType())))
df_b.show()
root
| col1: string (nullable = true)
| col2: string (nullable = true)
| rn: integer (nullable = true)
| case_condition: integer (nullable = true)
| empty_array: array (nullable = true)
| | element: string (containsNull = true)
</code></pre>