huaxingao commented on a change in pull request #34291:
URL: https://github.com/apache/spark/pull/34291#discussion_r734929416
##########
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JDBCRelation.scala
##########
@@ -298,17 +299,22 @@ private[sql] case class JDBCRelation(
requiredColumns: Array[String],
finalSchema: StructType,
filters: Array[Filter],
- groupByColumns: Option[Array[String]]): RDD[Row] = {
+ groupByColumns: Option[Array[String]],
+ limit: Option[Limit]): RDD[Row] = {
+ // If limit is pushed down, only a limited number of rows will be
returned. PartitionInfo will
+ // be ignored and the query will be done in one task.
Review comment:
Good idea! I will fix this. Thanks!
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
