Package org.apache.druid.catalog.model

Class ColumnSpec

java.lang.Object

org.apache.druid.catalog.model.ColumnSpec

public class ColumnSpec
extends Object

Specification of table columns.

Constructor Summary

Constructors

Constructor	Description
ColumnSpec(String name, String dataType, Map<String,Object> properties)
ColumnSpec(ColumnSpec from)

Method Summary

Modifier and Type	Method	Description
String	dataType()
boolean	equals(Object o)
int	hashCode()
ColumnSpec	merge(Map<String,ModelProperties.PropertyDefn<?>> columnProperties, ColumnSpec update)	Merges an updated version of this column with an existing version.
String	name()
Map<String,Object>	properties()
String	toString()
void	validate()

Methods inherited from class java.lang.Object

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

Constructor Details

ColumnSpec

public ColumnSpec(String name,
 @Nullable
 String dataType,
 @Nullable
 Map<String,Object> properties)

ColumnSpec

public ColumnSpec(ColumnSpec from)

Method Details

name

public String name()

dataType

public String dataType()

properties

public Map<String,Object> properties()

validate

public void validate()

merge

public ColumnSpec merge(Map<String,ModelProperties.PropertyDefn<?>> columnProperties,
 ColumnSpec update)

Merges an updated version of this column with an existing version.

The name cannot be changed (it is what links the existing column and the update). The SQL type will be that provided in the update, if non-null, else the original type. Properties are merged using standard rules: those in the update take precedence. Null values in the update remove the existing property, non-null values update the property. Any properties in the update but not in the existing set, are inserted (if non-null).

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object