StatisticsManager

Manager class for maintaining table statistics information cache.

Statistics information is useful for index selection and broadcast join support in TiSpark currently, and these are arranged follows:

statisticsMap contains tableId->TableStatistics data, each table(id) will have a TableStatistics if you have loaded statistics information successfully.

Linear Supertypes

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Value Members

final def !=(arg0: Any): Boolean

Definition Classes
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final def ##(): Int

Definition Classes
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final def ==(arg0: Any): Boolean

Definition Classes
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final def asInstanceOf[T0]: T0

Definition Classes
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def clone(): AnyRef

Attributes
protected[java.lang]
Definition Classes
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Annotations
@throws( ... )
final def eq(arg0: AnyRef): Boolean

Definition Classes
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def equals(arg0: Any): Boolean

Definition Classes
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def estimateTableSize(table: TiTableInfo): Long

Estimated table size in bytes using statistic info.
Estimated table size in bytes using statistic info.
table
table to estimate
returns
estimated table size in bytes
def estimatedRowCount(table: TiTableInfo): Long

Estimated row count of one table
Estimated row count of one table
table
table to evaluate
returns
estimated number of rows in this table
def finalize(): Unit

Attributes
protected[java.lang]
Definition Classes
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Annotations
@throws( classOf[java.lang.Throwable] )
final def getClass(): Class[_]

Definition Classes
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def getTableStatistics(id: Long): TableStatistics
def hashCode(): Int

Definition Classes
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def initStatisticsManager(tiSession: TiSession): Unit
def initialize(tiSession: TiSession): Unit

Attributes
protected
var initialized: Boolean

Attributes
protected
final def isInstanceOf[T0]: Boolean

Definition Classes
Any
def loadStatisticsInfo(table: TiTableInfo, columns: String*): Unit

Load statistics information maintained by TiDB to TiSpark.
Load statistics information maintained by TiDB to TiSpark.
table
The table whose statistics info is needed.
columns
Concerning columns for table, only these columns' statistics information will be loaded, if empty, all columns' statistics info will be loaded
final def ne(arg0: AnyRef): Boolean

Definition Classes
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final def notify(): Unit

Definition Classes
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final def notifyAll(): Unit

Definition Classes
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def reset(): Unit
def setEstimator(estimator: TableSizeEstimator): Unit
final def synchronized[T0](arg0: ⇒ T0): T0

Definition Classes
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def toString(): String

Definition Classes
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final def wait(): Unit

Definition Classes
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Annotations
@throws( ... )
final def wait(arg0: Long, arg1: Int): Unit

Definition Classes
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Annotations
@throws( ... )
final def wait(arg0: Long): Unit

Definition Classes
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Annotations
@throws( ... )

object StatisticsManager

Value Members

final def !=(arg0: Any): Boolean

final def ##(): Int

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 estimateTableSize(table: TiTableInfo): Long

def estimatedRowCount(table: TiTableInfo): Long

def finalize(): Unit

final def getClass(): Class[_]

def getTableStatistics(id: Long): TableStatistics

def hashCode(): Int

def initStatisticsManager(tiSession: TiSession): Unit

def initialize(tiSession: TiSession): Unit

var initialized: Boolean

final def isInstanceOf[T0]: Boolean

def loadStatisticsInfo(table: TiTableInfo, columns: String*): Unit

final def ne(arg0: AnyRef): Boolean

final def notify(): Unit

final def notifyAll(): Unit

def reset(): Unit

def setEstimator(estimator: TableSizeEstimator): 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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Inherited from Any

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