org.apache.gravitino.rel

Class TableChange.DeleteColumn

java.lang.Object

org.apache.gravitino.rel.TableChange.DeleteColumn

All Implemented Interfaces:

TableChange, TableChange.ColumnChange

Enclosing interface:

TableChange

public static final class TableChange.DeleteColumn
extends java.lang.Object
implements TableChange.ColumnChange

A TableChange to delete a field.

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 and Description
boolean	equals(java.lang.Object o) Compares this DeleteColumn instance with another object for equality.
java.lang.String[]	fieldName() Retrieves the field name of the column to be modified.
java.lang.String[]	getFieldName() Retrieves the field name of the column to be deleted.
java.lang.Boolean	getIfExists() Checks if the field should be deleted only if it exists.
int	hashCode() Generates a hash code for this DeleteColumn instance.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.gravitino.rel.TableChange

addColumn, addColumn, addColumn, addColumn, addColumn, addColumn, addColumn, addColumn, addColumn, addColumn, addColumn, addColumn, addColumn, addIndex, deleteColumn, deleteIndex, removeProperty, rename, renameColumn, setProperty, updateColumnAutoIncrement, updateColumnComment, updateColumnDefaultValue, updateColumnNullability, updateColumnPosition, updateColumnType, updateComment

Method Detail

getFieldName

public java.lang.String[] getFieldName()

Retrieves the field name of the column to be deleted.

Returns:

An array of strings representing the field name.

getIfExists

public java.lang.Boolean getIfExists()

Checks if the field should be deleted only if it exists.

Returns:

true if the field should be deleted only if it exists; false otherwise.

equals

public boolean equals(java.lang.Object o)

Compares this DeleteColumn instance with another object for equality. The comparison is based on the field name array and the 'ifExists' flag.

Overrides:

equals in class java.lang.Object

Parameters:

o - The object to compare with this instance.

Returns:

true if the given object represents the same field deletion; false otherwise.

hashCode

public int hashCode()

Generates a hash code for this DeleteColumn instance. The hash code is based on both the hierarchical field name and the 'ifExists' flag.

Overrides:

hashCode in class java.lang.Object

Returns:

A hash code value for this field deletion operation.

fieldName

public java.lang.String[] fieldName()

Description copied from interface: TableChange.ColumnChange

Retrieves the field name of the column to be modified.

Specified by:

fieldName in interface TableChange.ColumnChange

Returns:

An array of strings representing the field name.