TableChange.DropColumn (Flink : Table : Common 2.1.0 API)

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

All Methods Instance Methods Concrete Methods
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 Detail
  - 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