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. Columns have multiple types represented via the type field.

Constructor Summary

Constructors

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

Method Summary

Modifier and Type	Method and Description
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	sqlType()
String	toString()
void	validate()

Methods inherited from class java.lang.Object

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

Constructor Detail

ColumnSpec

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

ColumnSpec

public ColumnSpec(ColumnSpec from)

Method Detail

name

public String name()

sqlType

public String sqlType()

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