Packages

  • package root
    Definition Classes
    root
  • package org
    Definition Classes
    root
  • package apache
    Definition Classes
    org
  • package spark
    Definition Classes
    apache
  • package sql
    Definition Classes
    spark
  • package delta
    Definition Classes
    sql
  • package perf
    Definition Classes
    delta
  • trait OptimizeMetadataOnlyDeltaQuery extends LoggingShims

    Optimize COUNT, MIN and MAX expressions on Delta tables.

    Optimize COUNT, MIN and MAX expressions on Delta tables. This optimization is only applied when the following conditions are met: - The MIN/MAX columns are not nested and data type is supported by the optimization (ByteType, ShortType, IntegerType, LongType, FloatType, DoubleType, DateType). - All AddFiles in the Delta Log must have stats on columns used in MIN/MAX expressions, or the columns must be partitioned, in the latter case it uses partitionValues, a required field. - Table has no deletion vectors, or query has no MIN/MAX expressions. - COUNT has no DISTINCT. - Query has no filters. - Query has no GROUP BY. Example of valid query: SELECT COUNT(*), MIN(id), MAX(partition_col) FROM MyDeltaTable

    Definition Classes
    perf
  • DeltaColumnStat
  • LogStringContext
  • MetadataOptimizableAggregate

case class DeltaColumnStat(min: Any, max: Any) extends Product with Serializable

Min and max values from Delta Log stats or partitionValues.

Linear Supertypes
Serializable, Serializable, Product, Equals, AnyRef, Any
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. DeltaColumnStat
  2. Serializable
  3. Serializable
  4. Product
  5. Equals
  6. AnyRef
  7. Any
  1. Hide All
  2. Show All
Visibility
  1. Public
  2. All

Instance Constructors

  1. new DeltaColumnStat(min: Any, max: Any)

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. final def asInstanceOf[T0]: T0
    Definition Classes
    Any
  5. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  7. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  8. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  9. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  10. val max: Any
  11. val min: Any
  12. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  13. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  14. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  15. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  16. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  17. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  18. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()

Inherited from Serializable

Inherited from Serializable

Inherited from Product

Inherited from Equals

Inherited from AnyRef

Inherited from Any

Ungrouped