SchemaRelationProvider

::DeveloperApi:: Implemented by objects that produce relations for a specific kind of data source with a given schema. When Spark SQL is given a DDL operation with a USING clause specified ( to specify the implemented SchemaRelationProvider) and a user defined schema, 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 with be instantiated each time a DDL call is made.

The difference between a RelationProvider and a SchemaRelationProvider is that users need to provide a schema when using a SchemaRelationProvider. A relation provider can inherits both RelationProvider and SchemaRelationProvider if it can support both schema inference and user-specified schemas.

Annotations: @DeveloperApi()

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Abstract Value Members

abstract def createRelation(sqlContext: SQLContext, parameters: Map[String, String], schema: StructType): BaseRelation

Returns a new base relation with the given parameters and user defined schema.
Returns a new base relation with the given parameters and user defined schema. 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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final def !=(arg0: AnyRef): Boolean

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final def !=(arg0: Any): Boolean

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final def ==(arg0: AnyRef): Boolean

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final def eq(arg0: AnyRef): Boolean

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def equals(arg0: Any): Boolean

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def finalize(): Unit

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final def getClass(): Class[_]

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final def isInstanceOf[T0]: Boolean

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final def ne(arg0: AnyRef): Boolean

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final def notify(): Unit

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final def notifyAll(): Unit

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trait SchemaRelationProvider extends AnyRef

Abstract Value Members

abstract def createRelation(sqlContext: SQLContext, parameters: Map[String, String], schema: StructType): BaseRelation

Concrete Value Members

final def !=(arg0: AnyRef): Boolean

final def !=(arg0: Any): Boolean

final def ##(): Int

final def ==(arg0: AnyRef): Boolean

final def ==(arg0: Any): Boolean

final def asInstanceOf[T0]: T0

def clone(): AnyRef

final def eq(arg0: AnyRef): Boolean

def equals(arg0: Any): Boolean

def finalize(): Unit

final def getClass(): Class[_]

def hashCode(): Int

final def isInstanceOf[T0]: Boolean

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

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

def toString(): String

final def wait(): Unit

final def wait(arg0: Long, arg1: Int): Unit

final def wait(arg0: Long): Unit

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