Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/19911#discussion_r155333091
--- 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 --
Spark don't use `CASCADE` at all. I'm wondering if your PR will not solve
your problem.
```scala
def truncateTable(conn: Connection, table: String): Unit = {
val statement = conn.createStatement
try {
statement.executeUpdate(s"TRUNCATE TABLE $table")
} finally {
statement.close()
}
}
```
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