Package org.apache.drill.metastore.components.tables

Class TableMetadataUnit

java.lang.Object

org.apache.drill.metastore.components.tables.TableMetadataUnit

public class TableMetadataUnit
extends Object

Class that represents one row in Drill Metastore Tables which is a generic representation of metastore metadata suitable to any metastore table metadata type (table, segment, file, row group, partition). Is used to read and write data from / to Drill Metastore Tables implementation. Note: changing field order and adding new fields may break backward compatibility in existing Metastore implementations. It is recommended to add new information into additionalMetadata field instead.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	TableMetadataUnit.Builder
static class	TableMetadataUnit.Schema	Contains schema metadata, including lists of columns which belong to table, segment, file, row group or partition.

Field Summary

Fields

Modifier and Type	Field	Description
static final TableMetadataUnit	EMPTY_UNIT
static final TableMetadataUnit.Schema	SCHEMA

Method Summary

Modifier and Type	Method	Description
String	additionalMetadata()
static TableMetadataUnit.Builder	builder()
String	column()
Map<String,String>	columnsStatistics()
boolean	equals(Object o)
int	hashCode()
Map<String,Float>	hostAffinity()
List<String>	interestingColumns()
Long	lastModifiedTime()
String	location()
List<String>	locations()
String	metadataIdentifier()
String	metadataKey()
List<String>	metadataStatistics()
String	metadataType()
String	owner()
Map<String,String>	partitionKeys()
List<String>	partitionValues()
String	path()
Integer	rowGroupIndex()
String	schema()
String	storagePlugin()
String	tableName()
String	tableType()
TableMetadataUnit.Builder	toBuilder()
String	toString()
String	workspace()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

SCHEMA

public static final TableMetadataUnit.Schema SCHEMA

EMPTY_UNIT

public static final TableMetadataUnit EMPTY_UNIT

Method Details

builder

public static TableMetadataUnit.Builder builder()

storagePlugin

public String storagePlugin()

workspace

public String workspace()

tableName

public String tableName()

owner

public String owner()

tableType

public String tableType()

metadataType

public String metadataType()

metadataKey

public String metadataKey()

location

public String location()

interestingColumns

public List<String> interestingColumns()

schema

public String schema()

columnsStatistics

public Map<String,String> columnsStatistics()

metadataStatistics

public List<String> metadataStatistics()

lastModifiedTime

public Long lastModifiedTime()

partitionKeys

public Map<String,String> partitionKeys()

additionalMetadata

public String additionalMetadata()

metadataIdentifier

public String metadataIdentifier()

column

public String column()

locations

public List<String> locations()

partitionValues

public List<String> partitionValues()

path

public String path()

rowGroupIndex

public Integer rowGroupIndex()

hostAffinity

public Map<String,Float> hostAffinity()

toBuilder

public TableMetadataUnit.Builder toBuilder()

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object