Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/20057#discussion_r168883182
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/jdbc/AggregatedDialect.scala ---
@@ -64,7 +64,15 @@ private class AggregatedDialect(dialects:
List[JdbcDialect]) extends JdbcDialect
}
}
- override def getTruncateQuery(table: String): String = {
- dialects.head.getTruncateQuery(table)
+ /**
+ * The SQL query used to truncate a table.
+ * @param table The JDBCOptions.
+ * @param cascade Whether or not to cascade the truncation. Default value
is the
+ * value of isCascadingTruncateTable()
+ * @return The SQL query to use for truncating a table
+ */
+ override def getTruncateQuery(table: String,
+ cascade: Option[Boolean] =
isCascadingTruncateTable): String = {
--- End diff --
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