尝试 == 是的。

spark.sql("""select 
    object,
    case when green == true then 'A'
        when green == false then 'B'
        else 'C' end as case_when_statement
from tmp""").show() 

//+------+-------------------+
//|object|case_when_statement|
//+------+-------------------+
//|     1|                  A|
//|     2|                  B|
//|     3|                  A|
//+------+-------------------+
``` `In dataframe Api:` 使用 `===` 是的

df.withColumn("case_when_statement", when(col("green") === true,lit("A")).when(col("green")===false,lit("B")).otherwise(lit("c"))).show()
//+------+-----+-------------------+
//|object|green|case_when_statement|
//+------+-----+-------------------+
//| 1| true| A|
//| 2|false| B|
//| 3| true| A|
//+------+-----+-------------------+