Package org.apache.druid.segment.column

Class CapabilitiesBasedFormat

java.lang.Object

org.apache.druid.segment.column.CapabilitiesBasedFormat

All Implemented Interfaces:

ColumnFormat

public class CapabilitiesBasedFormat
extends Object
implements ColumnFormat

Legacy fallback column format used by columns which do not directly implement ColumnFormat. This should be avoided if possible in favor of implementing a ColumnFormat that is specific to the column type and can accurately capture the physical storage details and have fine-grained control over how merge(ColumnFormat), getColumnSchema(String) and getColumnHandler(String) behave.

Field Summary

Fields

Modifier and Type	Field	Description
static final ColumnCapabilities.CoercionLogic	DIMENSION_CAPABILITY_MERGE_LOGIC

Constructor Summary

Constructors

Constructor	Description
CapabilitiesBasedFormat(ColumnCapabilities capabilities)

Method Summary

Modifier and Type	Method	Description
static CapabilitiesBasedFormat	forColumnIndexer(ColumnCapabilities capabilities)
DimensionHandler	getColumnHandler(String columnName)	Create a DimensionHandler which can be used to create indexers and mergers to produce a new column with this format
DimensionSchema	getColumnSchema(String columnName)	Creates a DimensionSchema which can be used to create new segment schemas for ingestion jobs to create columns with this format
ColumnType	getLogicalType()
ColumnFormat	merge(ColumnFormat otherFormat)	Create a new ColumnFormat from this format and another format, merging implementation specific physical storage details as appropriate to determine what the new format should be.
ColumnCapabilities	toColumnCapabilities()	Convert physical column details to generic ColumnCapabilities for query time analysis

Methods inherited from class java.lang.Object

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

Field Details

DIMENSION_CAPABILITY_MERGE_LOGIC

public static final ColumnCapabilities.CoercionLogic DIMENSION_CAPABILITY_MERGE_LOGIC

Constructor Details

CapabilitiesBasedFormat

public CapabilitiesBasedFormat(ColumnCapabilities capabilities)

Method Details

forColumnIndexer

public static CapabilitiesBasedFormat forColumnIndexer(ColumnCapabilities capabilities)

getColumnHandler

public DimensionHandler getColumnHandler(String columnName)

Description copied from interface: ColumnFormat

Create a DimensionHandler which can be used to create indexers and mergers to produce a new column with this format

Specified by:

getColumnHandler in interface ColumnFormat

getColumnSchema

public DimensionSchema getColumnSchema(String columnName)

Description copied from interface: ColumnFormat

Creates a DimensionSchema which can be used to create new segment schemas for ingestion jobs to create columns with this format

Specified by:

getColumnSchema in interface ColumnFormat

merge

public ColumnFormat merge(@Nullable
 ColumnFormat otherFormat)

Description copied from interface: ColumnFormat

Create a new ColumnFormat from this format and another format, merging implementation specific physical storage details as appropriate to determine what the new format should be.

Specified by:

merge in interface ColumnFormat

getLogicalType

public ColumnType getLogicalType()

Specified by:

getLogicalType in interface ColumnFormat

toColumnCapabilities

public ColumnCapabilities toColumnCapabilities()

Description copied from interface: ColumnFormat

Convert physical column details to generic ColumnCapabilities for query time analysis

Specified by:

toColumnCapabilities in interface ColumnFormat