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

Class MetastoreTableInfo

java.lang.Object

org.apache.drill.metastore.components.tables.MetastoreTableInfo

public class MetastoreTableInfo
extends Object

Holds metastore table metadata information, including table information, exists status, last modified time and metastore version.

Constructor Summary

Constructors

Constructor	Description
MetastoreTableInfo(TableInfo tableInfo, Long lastModifiedTime, boolean exists, long metastoreVersion)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
boolean	hasChanged(boolean currentExists, Long currentLastModifiedTime)	Checks if table metadata has changed or not, based on given exists status and last modified time.
int	hashCode()
boolean	isExists()
Long	lastModifiedTime()
long	metastoreVersion()
static MetastoreTableInfo	of(TableInfo tableInfo, TableMetadataUnit unit, long metastoreVersion)
TableInfo	tableInfo()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

MetastoreTableInfo

public MetastoreTableInfo(TableInfo tableInfo,
 Long lastModifiedTime,
 boolean exists,
 long metastoreVersion)

Method Details

of

public static MetastoreTableInfo of(TableInfo tableInfo,
 TableMetadataUnit unit,
 long metastoreVersion)

tableInfo

public TableInfo tableInfo()

lastModifiedTime

public Long lastModifiedTime()

isExists

public boolean isExists()

metastoreVersion

public long metastoreVersion()

hasChanged

public boolean hasChanged(boolean currentExists,
 Long currentLastModifiedTime)

Checks if table metadata has changed or not, based on given exists status and last modified time. Checks are done based on the following rules and order:

• If table did not exist but now does not, return true.
• If table existed but now does, return true.
• If both last modified times are null, return false.
• If one last modified time is null and other is not, return true.
• If both last modified times are the same, return false.
• If both last modified times are different, return true.

Parameters:

currentExists - current table exists status

currentLastModifiedTime - current table lat modified time

Returns:

true if table metadata has changed, false otherwise

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