org.apache.flink.table.catalog

类 TableChange.ModifyColumn

java.lang.Object

org.apache.flink.table.catalog.TableChange.ModifyColumn

所有已实现的接口:

TableChange

直接已知子类:

TableChange.ModifyColumnComment, TableChange.ModifyColumnName, TableChange.ModifyColumnPosition, TableChange.ModifyPhysicalColumnType

封闭接口:

TableChange

@PublicEvolving
public static class TableChange.ModifyColumn
extends Object
implements TableChange

A base schema change to modify a column. The modification includes:

• change column data type
• reorder column position
• modify column comment
• rename column name
• change the computed expression
• change the metadata column expression

Some fine-grained column changes are defined in the TableChange.ModifyPhysicalColumnType, TableChange.ModifyColumnComment, TableChange.ModifyColumnPosition and TableChange.ModifyColumnName.

It is equal to the following statement:

    ALTER TABLE <table_name> MODIFY <column_definition> COMMENT '<column_comment>' <column_position>
 

嵌套类概要

从接口继承的嵌套类/接口 org.apache.flink.table.catalog.TableChange

TableChange.AddColumn, TableChange.AddUniqueConstraint, TableChange.AddWatermark, TableChange.After, TableChange.ColumnPosition, TableChange.DropColumn, TableChange.DropConstraint, TableChange.DropWatermark, TableChange.First, TableChange.ModifyColumn, TableChange.ModifyColumnComment, TableChange.ModifyColumnName, TableChange.ModifyColumnPosition, TableChange.ModifyPhysicalColumnType, TableChange.ModifyUniqueConstraint, TableChange.ModifyWatermark, TableChange.ResetOption, TableChange.SetOption

字段概要

字段

限定符和类型	字段和说明
protected Column	newColumn
protected TableChange.ColumnPosition	newPosition
protected Column	oldColumn

构造器概要

构造器

构造器和说明
ModifyColumn(Column oldColumn, Column newColumn, TableChange.ColumnPosition newPosition)

方法概要

限定符和类型	方法和说明
boolean	equals(Object o)
Column	getNewColumn() Returns the modified Column instance.
TableChange.ColumnPosition	getNewPosition() Returns the position of the modified Column instance.
Column	getOldColumn() Returns the original Column instance.
int	hashCode()
String	toString()

从类继承的方法 java.lang.Object

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

从接口继承的方法 org.apache.flink.table.catalog.TableChange

add, add, add, add, dropColumn, dropConstraint, dropWatermark, modify, modify, modify, modifyColumnComment, modifyColumnName, modifyColumnPosition, modifyPhysicalColumnType, reset, set

字段详细资料

oldColumn

protected final Column oldColumn

newColumn

protected final Column newColumn

newPosition

@Nullable
protected final TableChange.ColumnPosition newPosition

构造器详细资料

ModifyColumn

public ModifyColumn(Column oldColumn,
                    Column newColumn,
                    @Nullable
                    TableChange.ColumnPosition newPosition)

方法详细资料

getOldColumn

public Column getOldColumn()

Returns the original Column instance.

getNewColumn

public Column getNewColumn()

Returns the modified Column instance.

getNewPosition

@Nullable
public TableChange.ColumnPosition getNewPosition()

Returns the position of the modified Column instance. When the return value is null, it means modify the column at the original position. When the return value is FIRST, it means move the modified column to the first. When the return value is AFTER, it means move the column after the referred column.

equals

public boolean equals(Object o)

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

覆盖:

hashCode 在类中 Object

toString

public String toString()

覆盖:

toString 在类中 Object