Use the when() and otherwise() functions. For example:
import org.apache.spark.sql.functions._
val rows = Seq(("bob", 1), ("lucy", 2), ("pat", 3)).toDF("name", "genderCode")
rows.show
+----+----------+
|name|genderCode|
+----+----------+
| bob| 1|
|lucy| 2|
| pat| 3|
+----+----------+
rows
.withColumn("genderString", when('genderCode === 1,
"male").otherwise(when('genderCode === 2,
"female").otherwise("unknown")))
.show
+----+----------+------------+
|name|genderCode|genderString|
+----+----------+------------+
| bob| 1| male|
|lucy| 2| female|
| pat| 3| unknown|
+----+----------+------------+
On Sun, Nov 27, 2016 at 10:45 PM, Hitesh Goyal
<hitesh.go...@nlpcaptcha.com> wrote:
> Hi team,
>
> I am using Apache spark 1.6.1 version. In this I am writing Spark SQL
> queries. I found 2 ways of writing SQL queries. One is by simple SQL syntax
> and other is by using spark Dataframe functions.
>
> I need to execute if conditions by using dataframe functions. Please specify
> how can I do that.
>
>
>
> Regards,
>
> Hitesh Goyal
>
> Simpli5d Technologies
>
> Cont No.: 9996588220
>
>
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