io.druid.segment

Interface StorageAdapter

All Superinterfaces:

CursorFactory

All Known Implementing Classes:

IncrementalIndexStorageAdapter, QueryableIndexStorageAdapter

public interface StorageAdapter
extends CursorFactory

Method Summary

Modifier and Type	Method and Description
Indexed<String>	getAvailableDimensions()
Iterable<String>	getAvailableMetrics()
Capabilities	getCapabilities()
ColumnCapabilities	getColumnCapabilities(String column) Returns capabilities of a particular column, if known.
String	getColumnTypeName(String column) Like ColumnCapabilities.getType(), but may return a more descriptive string for complex columns.
int	getDimensionCardinality(String column) Returns the number of distinct values for the given dimension column For dimensions of unknown cardinality, e.g.
Map<String,DimensionHandler>	getDimensionHandlers()
org.joda.time.Interval	getInterval()
org.joda.time.DateTime	getMaxIngestedEventTime()
org.joda.time.DateTime	getMaxTime()
Comparable	getMaxValue(String column)
Metadata	getMetadata()
org.joda.time.DateTime	getMinTime()
Comparable	getMinValue(String column)
int	getNumRows()
String	getSegmentIdentifier()

Methods inherited from interface io.druid.segment.CursorFactory

makeCursors

Method Detail

getSegmentIdentifier

String getSegmentIdentifier()

getInterval

org.joda.time.Interval getInterval()

getAvailableDimensions

Indexed<String> getAvailableDimensions()

getAvailableMetrics

Iterable<String> getAvailableMetrics()

getDimensionCardinality

int getDimensionCardinality(String column)

Returns the number of distinct values for the given dimension column For dimensions of unknown cardinality, e.g. __time this currently returns Integer.MAX_VALUE

Parameters:

column -

Returns:

getMinTime

org.joda.time.DateTime getMinTime()

getMaxTime

org.joda.time.DateTime getMaxTime()

getMinValue

Comparable getMinValue(String column)

getMaxValue

Comparable getMaxValue(String column)

getCapabilities

Capabilities getCapabilities()

getColumnCapabilities

@Nullable
ColumnCapabilities getColumnCapabilities(String column)

Returns capabilities of a particular column, if known. May be null if the column doesn't exist, or if the column does exist but the capabilities are unknown. The latter is possible with dynamically discovered columns.

Parameters:

column - column name

Returns:

capabilities, or null

getDimensionHandlers

Map<String,DimensionHandler> getDimensionHandlers()

getColumnTypeName

String getColumnTypeName(String column)

Like ColumnCapabilities.getType(), but may return a more descriptive string for complex columns.

Parameters:

column - column name

Returns:

type name

getNumRows

int getNumRows()

getMaxIngestedEventTime

org.joda.time.DateTime getMaxIngestedEventTime()

getMetadata

Metadata getMetadata()