Github user gatorsmile commented on the issue:
https://github.com/apache/spark/pull/20057
@danielvdende @Fokko We definitely want to help the community replace Sqoop
by Spark SQL. However, `truncate` is only used when users use
<code>SaveMode.Overwrite</code> to write the external JDBC tables. In this
specific scenario, Spark will truncate an existing table instead of dropping
and recreating it.
Could you show me the key missing features that are available in Sqoop but
not in Spark SQL JDBC connectors?
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