Github user HyukjinKwon commented on a diff in the pull request: https://github.com/apache/spark/pull/12601#discussion_r69267676 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/jdbc/JdbcRelationProvider.scala --- @@ -19,37 +19,105 @@ package org.apache.spark.sql.execution.datasources.jdbc 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, SchemaRelationProvider} +import org.apache.spark.sql.types.StructType -class JdbcRelationProvider extends RelationProvider with DataSourceRegister { +class JdbcRelationProvider extends CreatableRelationProvider + with SchemaRelationProvider 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)) { + createRelation(sqlContext, parameters, null) + } + + /** Returns a new base relation with the given parameters. */ + override def createRelation( + sqlContext: SQLContext, + parameters: Map[String, String], + schema: StructType): BaseRelation = { + val url = parameters.getOrElse("url", sys.error("Option 'url' not specified")) + val table = parameters.getOrElse("dbtable", sys.error("Option 'dbtable' not specified")) + val partitionColumn = parameters.getOrElse("partitionColumn", null) + val lowerBound = parameters.getOrElse("lowerBound", null) + val upperBound = parameters.getOrElse("upperBound", null) + val numPartitions = parameters.getOrElse("numPartitions", null) --- End diff -- I think the validation can be done together in `JDBCOptions`.
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