Delete index from elasticsearch thru spark scala code

Elastic Stack Elasticsearch
1

I am creating a spark object which contains the stats of a table and writing into elasticsearch
val cases_count_stats = spark.sql("select col2,count(*) from table group by col2"
cases_count_stats.saveToEs("abc/def")

How do I delete the index everything before I create it ?

2

Elasticsearch for Apache Spark supports the OVERWRITE save mode from Spark's data source api. Could use that.