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t

org.apache.spark.sql.sources

RelationProvider

trait RelationProvider extends AnyRef

Implemented by objects that produce relations for a specific kind of data source. When Spark SQL is given a DDL operation with a USING clause specified (to specify the implemented RelationProvider), this interface is used to pass in the parameters specified by a user.

Users may specify the fully qualified class name of a given data source. When that class is not found Spark SQL will append the class name DefaultSource to the path, allowing for less verbose invocation. For example, 'org.apache.spark.sql.json' would resolve to the data source 'org.apache.spark.sql.json.DefaultSource'

A new instance of this class will be instantiated each time a DDL call is made.

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@Stable()
Since

1.3.0

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Abstract Value Members

  1. abstract def createRelation(sqlContext: SQLContext, parameters: Map[String, String]): BaseRelation

    Returns a new base relation with the given parameters.

    Returns a new base relation with the given parameters.

    Note

    The parameters' keywords are case insensitive and this insensitivity is enforced by the Map that is passed to the function.

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    (Since version ) see corresponding Javadoc for more information.

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