Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/15868#discussion_r87913599 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcUtils.scala --- @@ -667,7 +667,14 @@ object JdbcUtils extends Logging { val getConnection: () => Connection = createConnectionFactory(options) val batchSize = options.batchSize val isolationLevel = options.isolationLevel - df.foreachPartition(iterator => savePartition( + val numPartitions = options.numPartitions + val repartitionedDF = + if (numPartitions != null && numPartitions.toInt != df.rdd.getNumPartitions) { + df.repartition(numPartitions.toInt) --- End diff -- Is that ok to use `coalesce` here?
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