org.apache.druid.segment

Class QueryableIndexStorageAdapter

java.lang.Object

org.apache.druid.segment.QueryableIndexStorageAdapter

All Implemented Interfaces:

CursorFactory, StorageAdapter

public class QueryableIndexStorageAdapter
extends Object
implements StorageAdapter

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	QueryableIndexStorageAdapter.AscendingTimestampCheckingOffset
static class	QueryableIndexStorageAdapter.DescendingTimestampCheckingOffset
static class	QueryableIndexStorageAdapter.TimestampCheckingOffset

Constructor Summary

Constructors

Constructor and Description
QueryableIndexStorageAdapter(QueryableIndex index)

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 columnName) Like ColumnCapabilities.getType(), but may return a more descriptive string for complex columns.
int	getDimensionCardinality(String dimension) Returns the number of distinct values for the given column if known, or Integer.MAX_VALUE if unknown, e.
org.joda.time.Interval	getInterval()
org.joda.time.DateTime	getMaxIngestedEventTime()
org.joda.time.DateTime	getMaxTime()
Comparable	getMaxValue(String dimension)
Metadata	getMetadata()
org.joda.time.DateTime	getMinTime()
Comparable	getMinValue(String dimension)
int	getNumRows()
String	getSegmentIdentifier()
Sequence<Cursor>	makeCursors(Filter filter, org.joda.time.Interval interval, VirtualColumns virtualColumns, Granularity gran, boolean descending, QueryMetrics<?> queryMetrics)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

QueryableIndexStorageAdapter

public QueryableIndexStorageAdapter(QueryableIndex index)

Method Detail

getSegmentIdentifier

public String getSegmentIdentifier()

Specified by:

getSegmentIdentifier in interface StorageAdapter

getInterval

public org.joda.time.Interval getInterval()

Specified by:

getInterval in interface StorageAdapter

getAvailableDimensions

public Indexed<String> getAvailableDimensions()

Specified by:

getAvailableDimensions in interface StorageAdapter

getAvailableMetrics

public Iterable<String> getAvailableMetrics()

Specified by:

getAvailableMetrics in interface StorageAdapter

getDimensionCardinality

public int getDimensionCardinality(String dimension)

Description copied from interface: StorageAdapter

Returns the number of distinct values for the given column if known, or Integer.MAX_VALUE if unknown, e. g. the column is numeric. If the column doesn't exist, returns 0.

Specified by:

getDimensionCardinality in interface StorageAdapter

getNumRows

public int getNumRows()

Specified by:

getNumRows in interface StorageAdapter

getMinTime

public org.joda.time.DateTime getMinTime()

Specified by:

getMinTime in interface StorageAdapter

getMaxTime

public org.joda.time.DateTime getMaxTime()

Specified by:

getMaxTime in interface StorageAdapter

getMinValue

@Nullable
public Comparable getMinValue(String dimension)

Specified by:

getMinValue in interface StorageAdapter

getMaxValue

@Nullable
public Comparable getMaxValue(String dimension)

Specified by:

getMaxValue in interface StorageAdapter

getCapabilities

public Capabilities getCapabilities()

Specified by:

getCapabilities in interface StorageAdapter

getColumnCapabilities

@Nullable
public ColumnCapabilities getColumnCapabilities(String column)

Description copied from interface: StorageAdapter

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.

Specified by:

getColumnCapabilities in interface StorageAdapter

Parameters:

column - column name

Returns:

capabilities, or null

getColumnTypeName

public String getColumnTypeName(String columnName)

Description copied from interface: StorageAdapter

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

Specified by:

getColumnTypeName in interface StorageAdapter

Parameters:

columnName - column name

Returns:

type name

getMaxIngestedEventTime

public org.joda.time.DateTime getMaxIngestedEventTime()

Specified by:

getMaxIngestedEventTime in interface StorageAdapter

makeCursors

public Sequence<Cursor> makeCursors(@Nullable
                                    Filter filter,
                                    org.joda.time.Interval interval,
                                    VirtualColumns virtualColumns,
                                    Granularity gran,
                                    boolean descending,
                                    @Nullable
                                    QueryMetrics<?> queryMetrics)

Specified by:

makeCursors in interface CursorFactory

getMetadata

public Metadata getMetadata()

Specified by:

getMetadata in interface StorageAdapter