Package org.apache.gravitino.rel

Class TableChange.UpdateColumnDefaultValue

java.lang.Object

org.apache.gravitino.rel.TableChange.UpdateColumnDefaultValue

All Implemented Interfaces:

TableChange, TableChange.ColumnChange

Enclosing interface:

TableChange

public static final class TableChange.UpdateColumnDefaultValue
extends Object
implements TableChange.ColumnChange

A TableChange to update the default of a field.

The field names are used to find the field to update.

If the field does not exist, the change must result in an IllegalArgumentException.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.gravitino.rel.TableChange

TableChange.AddColumn, TableChange.AddIndex, TableChange.After, TableChange.ColumnChange, TableChange.ColumnPosition, TableChange.Default, TableChange.DeleteColumn, TableChange.DeleteIndex, TableChange.First, TableChange.RemoveProperty, TableChange.RenameColumn, TableChange.RenameTable, TableChange.SetProperty, TableChange.UpdateColumnAutoIncrement, TableChange.UpdateColumnComment, TableChange.UpdateColumnDefaultValue, TableChange.UpdateColumnNullability, TableChange.UpdateColumnPosition, TableChange.UpdateColumnType, TableChange.UpdateComment

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)	Compares this UpdateColumnDefaultValue instance with another object for equality.
String[]	fieldName()	Retrieves the field name of the column whose default value is being updated.
Expression	getNewDefaultValue()	Retrieves the new default value for the column.
int	hashCode()	Generates a hash code for this UpdateColumnDefaultValue instance.

Methods inherited from class java.lang.Object

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

Method Details

fieldName

public String[] fieldName()

Retrieves the field name of the column whose default value is being updated.

Specified by:

fieldName in interface TableChange.ColumnChange

Returns:

An array of strings representing the field name.

getNewDefaultValue

public Expression getNewDefaultValue()

Retrieves the new default value for the column.

Returns:

The new default value of the column.

equals

public boolean equals(Object o)

Compares this UpdateColumnDefaultValue instance with another object for equality. The comparison is based on the field name array and the new default value.

Overrides:

equals in class Object

Parameters:

o - The object to compare with this instance.

Returns:

true if the given object represents the same default value update; false otherwise.

hashCode

public int hashCode()

Generates a hash code for this UpdateColumnDefaultValue instance. The hash code is based on both the hierarchical field name and the new default value.

Overrides:

hashCode in class Object

Returns:

A hash code value for this default value update operation.