Github user bolkedebruin commented on a diff in the pull request:
https://github.com/apache/spark/pull/19911#discussion_r155342020
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/jdbc/PostgresDialect.scala ---
@@ -100,5 +100,5 @@ private object PostgresDialect extends JdbcDialect {
}
- override def isCascadingTruncateTable(): Option[Boolean] = Some(true)
+ override def isCascadingTruncateTable(): Option[Boolean] = Some(false)
--- End diff --
In not sure if you are agreeing or not agreeing with me now :-) , but at
least as just shown truncate is supported and does not cascade by default on
Postgres. Can we conclude that this change seems right for Postgres, which is
the only affected supported database by Spark - others default to truncate?
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