Packages

class CacheManager extends Logging

Provides support in a SQLContext for caching query results and automatically using these cached results when subsequent queries are executed. Data is cached using byte buffers stored in an InMemoryRelation. This relation is automatically substituted query plans that return the sameResult as the originally cached query.

Internal to Spark SQL.

Linear Supertypes
Logging, AnyRef, Any
Ordering
  1. Alphabetic
  2. By Inheritance
Inherited
  1. CacheManager
  2. Logging
  3. AnyRef
  4. Any
  1. Hide All
  2. Show All
Visibility
  1. Public
  2. All

Instance Constructors

  1. new CacheManager()

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 cacheQuery(query: Dataset[_], tableName: Option[String] = None, storageLevel: StorageLevel = MEMORY_AND_DISK): Unit

    Caches the data produced by the logical representation of the given Dataset.

    Caches the data produced by the logical representation of the given Dataset. Unlike RDD.cache(), the default storage level is set to be MEMORY_AND_DISK because recomputing the in-memory columnar representation of the underlying table is expensive.

  6. def clearCache(): Unit

    Clears all cached tables.

  7. def clone(): AnyRef
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  8. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  9. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  10. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  11. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  12. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native()
  13. def initializeForcefully(isInterpreter: Boolean, silent: Boolean): Unit
    Definition Classes
    Logging
  14. def initializeLogIfNecessary(isInterpreter: Boolean, silent: Boolean): Boolean
    Attributes
    protected
    Definition Classes
    Logging
  15. def initializeLogIfNecessary(isInterpreter: Boolean): Unit
    Attributes
    protected
    Definition Classes
    Logging
  16. def isEmpty: Boolean

    Checks if the cache is empty.

  17. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  18. def isTraceEnabled(): Boolean
    Attributes
    protected
    Definition Classes
    Logging
  19. def log: Logger
    Attributes
    protected
    Definition Classes
    Logging
  20. def logDebug(msg: ⇒ String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  21. def logDebug(msg: ⇒ String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  22. def logError(msg: ⇒ String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  23. def logError(msg: ⇒ String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  24. def logInfo(msg: ⇒ String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  25. def logInfo(msg: ⇒ String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  26. def logName: String
    Attributes
    protected
    Definition Classes
    Logging
  27. def logTrace(msg: ⇒ String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  28. def logTrace(msg: ⇒ String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  29. def logWarning(msg: ⇒ String, throwable: Throwable): Unit
    Attributes
    protected
    Definition Classes
    Logging
  30. def logWarning(msg: ⇒ String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  31. def lookupCachedData(plan: LogicalPlan): Option[CachedData]

    Optionally returns cached data for the given LogicalPlan.

  32. def lookupCachedData(query: Dataset[_]): Option[CachedData]

    Optionally returns cached data for the given Dataset

  33. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  34. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  35. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native()
  36. def recacheByPath(spark: SparkSession, resourcePath: String): Unit

    Tries to re-cache all the cache entries that contain resourcePath in one or more HadoopFsRelation node(s) as part of its logical plan.

  37. def recacheByPlan(spark: SparkSession, plan: LogicalPlan): Unit

    Tries to re-cache all the cache entries that refer to the given plan.

  38. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  39. def toString(): String
    Definition Classes
    AnyRef → Any
  40. def uncacheQuery(spark: SparkSession, plan: LogicalPlan, cascade: Boolean, blocking: Boolean = false): Unit

    Un-cache the given plan or all the cache entries that refer to the given plan.

    Un-cache the given plan or all the cache entries that refer to the given plan.

    spark

    The Spark session.

    plan

    The plan to be un-cached.

    cascade

    If true, un-cache all the cache entries that refer to the given plan; otherwise un-cache the given plan only.

    blocking

    Whether to block until all blocks are deleted.

  41. def uncacheQuery(query: Dataset[_], cascade: Boolean): Unit

    Un-cache the given plan or all the cache entries that refer to the given plan.

    Un-cache the given plan or all the cache entries that refer to the given plan.

    query

    The Dataset to be un-cached.

    cascade

    If true, un-cache all the cache entries that refer to the given Dataset; otherwise un-cache the given Dataset only.

  42. def useCachedData(plan: LogicalPlan): LogicalPlan

    Replaces segments of the given logical plan with cached versions where possible.

  43. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  44. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  45. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()

Inherited from Logging

Inherited from AnyRef

Inherited from Any

Ungrouped