org.apache.spark.rdd

JdbcRDD

object JdbcRDD extends Serializable

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  1. trait ConnectionFactory extends Serializable

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  8. def create(sc: JavaSparkContext, connectionFactory: ConnectionFactory, sql: String, lowerBound: Long, upperBound: Long, numPartitions: Int): JavaRDD[Array[AnyRef]]

    Create an RDD that executes an SQL query on a JDBC connection and reads results.

    Create an RDD that executes an SQL query on a JDBC connection and reads results. Each row is converted into a Object array. For usage example, see test case JavaAPISuite.testJavaJdbcRDD.

    connectionFactory

    a factory that returns an open Connection. The RDD takes care of closing the connection.

    sql

    the text of the query. The query must contain two ? placeholders for parameters used to partition the results. E.g. "select title, author from books where ? <= id and id <= ?"

    lowerBound

    the minimum value of the first placeholder

    upperBound

    the maximum value of the second placeholder The lower and upper bounds are inclusive.

    numPartitions

    the number of partitions. Given a lowerBound of 1, an upperBound of 20, and a numPartitions of 2, the query would be executed twice, once with (1, 10) and once with (11, 20)

  9. def create[T](sc: JavaSparkContext, connectionFactory: ConnectionFactory, sql: String, lowerBound: Long, upperBound: Long, numPartitions: Int, mapRow: Function[ResultSet, T]): JavaRDD[T]

    Create an RDD that executes an SQL query on a JDBC connection and reads results.

    Create an RDD that executes an SQL query on a JDBC connection and reads results. For usage example, see test case JavaAPISuite.testJavaJdbcRDD.

    connectionFactory

    a factory that returns an open Connection. The RDD takes care of closing the connection.

    sql

    the text of the query. The query must contain two ? placeholders for parameters used to partition the results. E.g. "select title, author from books where ? <= id and id <= ?"

    lowerBound

    the minimum value of the first placeholder

    upperBound

    the maximum value of the second placeholder The lower and upper bounds are inclusive.

    numPartitions

    the number of partitions. Given a lowerBound of 1, an upperBound of 20, and a numPartitions of 2, the query would be executed twice, once with (1, 10) and once with (11, 20)

    mapRow

    a function from a ResultSet to a single row of the desired result type(s). This should only call getInt, getString, etc; the RDD takes care of calling next. The default maps a ResultSet to an array of Object.

  10. final def eq(arg0: AnyRef): Boolean

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  12. def finalize(): Unit

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  18. final def notifyAll(): Unit

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  19. def resultSetToObjectArray(rs: ResultSet): Array[AnyRef]

  20. final def synchronized[T0](arg0: ⇒ T0): T0

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