Github user JustinPihony commented on a diff in the pull request:
https://github.com/apache/spark/pull/12601#discussion_r77948196
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcRelationProvider.scala
---
@@ -17,39 +17,105 @@
package org.apache.spark.sql.execution.datasources.jdbc
+import java.sql.SQLException
import java.util.Properties
-import org.apache.spark.sql.SQLContext
-import org.apache.spark.sql.sources.{BaseRelation, DataSourceRegister,
RelationProvider}
+import org.apache.spark.sql.{DataFrame, SaveMode, SQLContext}
+import org.apache.spark.sql.sources.{BaseRelation,
CreatableRelationProvider, DataSourceRegister, RelationProvider}
+import org.apache.spark.sql.types.StructType
-class JdbcRelationProvider extends RelationProvider with
DataSourceRegister {
+class JdbcRelationProvider extends CreatableRelationProvider
+ with RelationProvider with DataSourceRegister {
override def shortName(): String = "jdbc"
- /** Returns a new base relation with the given parameters. */
override def createRelation(
sqlContext: SQLContext,
parameters: Map[String, String]): BaseRelation = {
val jdbcOptions = new JDBCOptions(parameters)
- if (jdbcOptions.partitionColumn != null
- && (jdbcOptions.lowerBound == null
- || jdbcOptions.upperBound == null
- || jdbcOptions.numPartitions == null)) {
- sys.error("Partitioning incompletely specified")
- }
+ val partitionColumn = jdbcOptions.partitionColumn
+ val lowerBound = jdbcOptions.lowerBound
+ val upperBound = jdbcOptions.upperBound
+ val numPartitions = jdbcOptions.numPartitions
- val partitionInfo = if (jdbcOptions.partitionColumn == null) {
- null
- } else {
+ val partitionInfo = if (partitionColumn == null) { null }
--- End diff --
Yes, but the guidelines do not specify this scenario. It is not returning a
unit, but a value and looks ridiculous in comparison. I have made the change to
fit your needs and "_speed_" up, though.
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