Packages

t

org.apache.spark.sql.delta.perf

OptimizeMetadataOnlyDeltaQuery

trait OptimizeMetadataOnlyDeltaQuery extends LoggingShims

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

Linear Supertypes
LoggingShims, Logging, AnyRef, Any
Known Subclasses
PrepareDeltaScan, PrepareDeltaScanBase
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  1. OptimizeMetadataOnlyDeltaQuery
  2. LoggingShims
  3. Logging
  4. AnyRef
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Visibility
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Type Members

  1. implicit class LogStringContext extends AnyRef
    Definition Classes
    LoggingShims
  2. case class DeltaColumnStat(min: Any, max: Any) extends Product with Serializable

    Min and max values from Delta Log stats or partitionValues.

Abstract Value Members

  1. abstract def getDeltaScanGenerator(index: TahoeLogFileIndex): DeltaScanGenerator
    Attributes
    protected

Concrete 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() @IntrinsicCandidate()
  6. final def eq(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  7. def equals(arg0: Any): Boolean
    Definition Classes
    AnyRef → Any
  8. final def getClass(): Class[_]
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @IntrinsicCandidate()
  9. def hashCode(): Int
    Definition Classes
    AnyRef → Any
    Annotations
    @native() @IntrinsicCandidate()
  10. def initializeLogIfNecessary(isInterpreter: Boolean, silent: Boolean): Boolean
    Attributes
    protected
    Definition Classes
    Logging
  11. def initializeLogIfNecessary(isInterpreter: Boolean): Unit
    Attributes
    protected
    Definition Classes
    Logging
  12. final def isInstanceOf[T0]: Boolean
    Definition Classes
    Any
  13. def isTraceEnabled(): Boolean
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    protected
    Definition Classes
    Logging
  14. def log: Logger
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    protected
    Definition Classes
    Logging
  15. def logDebug(entry: LogEntry, throwable: Throwable): Unit
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    protected
    Definition Classes
    LoggingShims
  16. def logDebug(entry: LogEntry): Unit
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    protected
    Definition Classes
    LoggingShims
  17. def logDebug(msg: ⇒ String, throwable: Throwable): Unit
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    Definition Classes
    Logging
  18. def logDebug(msg: ⇒ String): Unit
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    protected
    Definition Classes
    Logging
  19. def logError(entry: LogEntry, throwable: Throwable): Unit
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    protected
    Definition Classes
    LoggingShims
  20. def logError(entry: LogEntry): Unit
    Attributes
    protected
    Definition Classes
    LoggingShims
  21. def logError(msg: ⇒ String, throwable: Throwable): Unit
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    protected
    Definition Classes
    Logging
  22. def logError(msg: ⇒ String): Unit
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    protected
    Definition Classes
    Logging
  23. def logInfo(entry: LogEntry, throwable: Throwable): Unit
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    Definition Classes
    LoggingShims
  24. def logInfo(entry: LogEntry): Unit
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    Definition Classes
    LoggingShims
  25. def logInfo(msg: ⇒ String, throwable: Throwable): Unit
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    Definition Classes
    Logging
  26. def logInfo(msg: ⇒ String): Unit
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    Definition Classes
    Logging
  27. def logName: String
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    protected
    Definition Classes
    Logging
  28. def logTrace(entry: LogEntry, throwable: Throwable): Unit
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    Definition Classes
    LoggingShims
  29. def logTrace(entry: LogEntry): Unit
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    Definition Classes
    LoggingShims
  30. def logTrace(msg: ⇒ String, throwable: Throwable): Unit
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    Definition Classes
    Logging
  31. def logTrace(msg: ⇒ String): Unit
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    Definition Classes
    Logging
  32. def logWarning(entry: LogEntry, throwable: Throwable): Unit
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    LoggingShims
  33. def logWarning(entry: LogEntry): Unit
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    Definition Classes
    LoggingShims
  34. def logWarning(msg: ⇒ String, throwable: Throwable): Unit
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    protected
    Definition Classes
    Logging
  35. def logWarning(msg: ⇒ String): Unit
    Attributes
    protected
    Definition Classes
    Logging
  36. final def ne(arg0: AnyRef): Boolean
    Definition Classes
    AnyRef
  37. final def notify(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @IntrinsicCandidate()
  38. final def notifyAll(): Unit
    Definition Classes
    AnyRef
    Annotations
    @native() @IntrinsicCandidate()
  39. def optimizeQueryWithMetadata(plan: LogicalPlan): LogicalPlan
  40. final def synchronized[T0](arg0: ⇒ T0): T0
    Definition Classes
    AnyRef
  41. def toString(): String
    Definition Classes
    AnyRef → Any
  42. final def wait(arg0: Long, arg1: Int): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  43. final def wait(arg0: Long): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... ) @native()
  44. final def wait(): Unit
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  45. object MetadataOptimizableAggregate

Deprecated Value Members

  1. def finalize(): Unit
    Attributes
    protected[lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] ) @Deprecated
    Deprecated

Inherited from LoggingShims

Inherited from Logging

Inherited from AnyRef

Inherited from Any

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