cloud-fan commented on a change in pull request #34554:
URL: https://github.com/apache/spark/pull/34554#discussion_r761129237
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File path: sql/core/src/main/scala/org/apache/spark/sql/jdbc/JdbcDialects.scala
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@@ -193,6 +194,36 @@ abstract class JdbcDialect extends Serializable with
Logging{
case _ => value
}
+ /**
+ * Converts aggregate function to String representing a SQL expression.
+ * @param aggregates The aggregate functions to be converted.
+ * @return Converted value.
+ */
+ @Since("3.3.0")
+ def compileAggregates(aggregates: Seq[AggregateFunc]): Option[Seq[String]] =
{
Review comment:
since this is an API now, shall we make it `def
compileAggregates(func:AggregateFunc): Option[String]` so that it's cleaner and
easier to implement?
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