Packages

c

io.delta.sql

DeltaSparkSessionExtension

class DeltaSparkSessionExtension extends (SparkSessionExtensions) => Unit

An extension for Spark SQL to activate Delta SQL parser to support Delta SQL grammar.

Scala example to create a SparkSession with the Delta SQL parser:

import org.apache.spark.sql.SparkSession

val spark = SparkSession
   .builder()
   .appName("...")
   .master("...")
   .config("spark.sql.extensions", "io.delta.sql.DeltaSparkSessionExtension")
   .getOrCreate()

Java example to create a SparkSession with the Delta SQL parser:

import org.apache.spark.sql.SparkSession;

SparkSession spark = SparkSession
             .builder()
             .appName("...")
             .master("...")
             .config("spark.sql.extensions", "io.delta.sql.DeltaSparkSessionExtension")
             .getOrCreate();

Python example to create a SparkSession with the Delta SQL parser (PySpark doesn't pick up the SQL conf "spark.sql.extensions" in Apache Spark 2.4.x, hence we need to activate it manually in 2.4.x. However, because SparkSession has been created and everything has been materialized, we need to clone a new session to trigger the initialization. See SPARK-25003):

from pyspark.sql import SparkSession

spark = SparkSession \
    .builder \
    .appName("...") \
    .master("...") \
    .config("spark.sql.extensions", "io.delta.sql.DeltaSparkSessionExtension") \
    .getOrCreate()
if spark.sparkContext().version < "3.":
    spark.sparkContext()._jvm.io.delta.sql.DeltaSparkSessionExtension() \
        .apply(spark._jsparkSession.extensions())
    spark = SparkSession(spark.sparkContext(), spark._jsparkSession.cloneSession())
Since

0.4.0

Linear Supertypes
(SparkSessionExtensions) => Unit, AnyRef, Any
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Inherited
  1. DeltaSparkSessionExtension
  2. Function1
  3. AnyRef
  4. Any
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Visibility
  1. Public
  2. Protected

Instance Constructors

  1. new DeltaSparkSessionExtension()

Type Members

  1. class NoOpRule extends Rule[LogicalPlan]

    An no op rule which doesn't apply any changes to the LogicalPlan.

    An no op rule which doesn't apply any changes to the LogicalPlan. Used to be injected upon exceptions.

Value Members

  1. final def !=(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  2. final def ##: Int
    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  4. def andThen[A](g: (Unit) => A): (SparkSessionExtensions) => A
    Definition Classes
    Function1
    Annotations
    @unspecialized()
  5. def apply(extensions: SparkSessionExtensions): Unit
    Definition Classes
    DeltaSparkSessionExtension → Function1
  6. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  7. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.CloneNotSupportedException]) @native()
  8. def compose[A](g: (A) => SparkSessionExtensions): (A) => Unit
    Definition Classes
    Function1
    Annotations
    @unspecialized()
  9. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  10. def equals(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef → Any
  11. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.Throwable])
  12. final def getClass(): Class[_ <: AnyRef]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  13. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  14. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  15. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  16. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  17. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  18. final def synchronized[T0](arg0: => T0): T0
    Definition Classes
    AnyRef
  19. def toString(): String
    Definition Classes
    Function1 → AnyRef → Any
  20. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  21. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException])
  22. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws(classOf[java.lang.InterruptedException]) @native()

Inherited from (SparkSessionExtensions) => Unit

Inherited from AnyRef

Inherited from Any

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