Package org.apache.flink.table.catalog

Class TableChange.DropColumn

java.lang.Object

org.apache.flink.table.catalog.TableChange.DropColumn

All Implemented Interfaces:

TableChange, TableChange.CatalogTableChange, TableChange.MaterializedTableChange

Enclosing interface:

TableChange

@PublicEvolving
public static class TableChange.DropColumn
extends Object
implements TableChange.CatalogTableChange, TableChange.MaterializedTableChange

A table change to drop the column.

It is equal to the following statement:

    ALTER TABLE <table_name> DROP COLUMN <column_name>
 

Note: A DropColumn change may also occur when rolling back the schema during a failed ALTER MATERIALIZED TABLE AS QUERY operation. If the operation fails, columns added to align with the query results may need to be removed to restore the original schema.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.table.catalog.TableChange

TableChange.AddColumn, TableChange.AddDistribution, TableChange.AddUniqueConstraint, TableChange.AddWatermark, TableChange.After, TableChange.CatalogTableChange, TableChange.ColumnPosition, TableChange.DropColumn, TableChange.DropConstraint, TableChange.DropDistribution, TableChange.DropWatermark, TableChange.First, TableChange.MaterializedTableChange, TableChange.ModifyColumn, TableChange.ModifyColumnComment, TableChange.ModifyColumnName, TableChange.ModifyColumnPosition, TableChange.ModifyDefinitionQuery, TableChange.ModifyDistribution, TableChange.ModifyPhysicalColumnType, TableChange.ModifyRefreshHandler, TableChange.ModifyRefreshStatus, TableChange.ModifyUniqueConstraint, TableChange.ModifyWatermark, TableChange.ResetOption, TableChange.SetOption

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
String	getColumnName()	Returns the column name.
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

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

Method Details

getColumnName

public String getColumnName()

Returns the column name.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object