org.apache.flink.table.api

类 TableColumn

java.lang.Object

org.apache.flink.table.api.TableColumn

直接已知子类:

TableColumn.ComputedColumn, TableColumn.MetadataColumn, TableColumn.PhysicalColumn

已过时。

See ResolvedSchema and Column.

@Deprecated
 @PublicEvolving
public abstract class TableColumn
extends Object

Representation of a table column in the API.

A table column is fully resolved with a name and DataType. It describes either a TableColumn.PhysicalColumn, TableColumn.ComputedColumn, or TableColumn.MetadataColumn.

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	TableColumn.ComputedColumn 已过时。 Representation of a computed column.
static class	TableColumn.MetadataColumn 已过时。 Representation of a metadata column.
static class	TableColumn.PhysicalColumn 已过时。 Representation of a physical column.

方法概要

限定符和类型	方法和说明
String	asSummaryString() 已过时。 Returns a string that summarizes this column for printing to a console.
static TableColumn.ComputedColumn	computed(String name, DataType type, String expression) 已过时。 Creates a computed column that is computed from the given SQL expression.
boolean	equals(Object o) 已过时。
abstract Optional<String>	explainExtras() 已过时。 Returns an explanation of specific column extras next to name and type.
String	getName() 已过时。 Returns the name of this column.
DataType	getType() 已过时。 Returns the data type of this column.
int	hashCode() 已过时。
abstract boolean	isPersisted() 已过时。 Returns whether the given column is persisted in a sink operation.
abstract boolean	isPhysical() 已过时。 Returns whether the given column is a physical column of a table; neither computed nor metadata.
static TableColumn.MetadataColumn	metadata(String name, DataType type) 已过时。 Creates a metadata column from metadata of the given column name.
static TableColumn.MetadataColumn	metadata(String name, DataType type, boolean isVirtual) 已过时。 Creates a metadata column from metadata of the given column name.
static TableColumn.MetadataColumn	metadata(String name, DataType type, String metadataAlias) 已过时。 Creates a metadata column from metadata of the given alias.
static TableColumn.MetadataColumn	metadata(String name, DataType type, String metadataAlias, boolean isVirtual) 已过时。 Creates a metadata column from metadata of the given column name or from metadata of the given alias (if not null).
static TableColumn	of(String name, DataType type) 已过时。 Use physical(String, DataType) instead.
static TableColumn	of(String name, DataType type, String expression) 已过时。 Use computed(String, DataType, String) instead.
static TableColumn.PhysicalColumn	physical(String name, DataType type) 已过时。 Creates a regular table column that represents physical data.
String	toString() 已过时。

从类继承的方法 java.lang.Object

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

方法详细资料

physical

public static TableColumn.PhysicalColumn physical(String name,
                                                  DataType type)

已过时。

Creates a regular table column that represents physical data.

computed

public static TableColumn.ComputedColumn computed(String name,
                                                  DataType type,
                                                  String expression)

已过时。

Creates a computed column that is computed from the given SQL expression.

metadata

public static TableColumn.MetadataColumn metadata(String name,
                                                  DataType type)

已过时。

Creates a metadata column from metadata of the given column name.

The column is not virtual by default.

metadata

public static TableColumn.MetadataColumn metadata(String name,
                                                  DataType type,
                                                  boolean isVirtual)

已过时。

Creates a metadata column from metadata of the given column name.

Allows to specify whether the column is virtual or not.

metadata

public static TableColumn.MetadataColumn metadata(String name,
                                                  DataType type,
                                                  String metadataAlias)

已过时。

Creates a metadata column from metadata of the given alias.

The column is not virtual by default.

metadata

public static TableColumn.MetadataColumn metadata(String name,
                                                  DataType type,
                                                  @Nullable
                                                  String metadataAlias,
                                                  boolean isVirtual)

已过时。

Creates a metadata column from metadata of the given column name or from metadata of the given alias (if not null).

Allows to specify whether the column is virtual or not.

of

@Deprecated
public static TableColumn of(String name,
                                         DataType type)

已过时。 Use physical(String, DataType) instead.

of

@Deprecated
public static TableColumn of(String name,
                                         DataType type,
                                         String expression)

已过时。 Use computed(String, DataType, String) instead.

isPhysical

public abstract boolean isPhysical()

已过时。

Returns whether the given column is a physical column of a table; neither computed nor metadata.

isPersisted

public abstract boolean isPersisted()

已过时。

Returns whether the given column is persisted in a sink operation.

getType

public DataType getType()

已过时。

Returns the data type of this column.

getName

public String getName()

已过时。

Returns the name of this column.

asSummaryString

public String asSummaryString()

已过时。

Returns a string that summarizes this column for printing to a console.

explainExtras

public abstract Optional<String> explainExtras()

已过时。

Returns an explanation of specific column extras next to name and type.

equals

public boolean equals(Object o)

已过时。

覆盖:

equals 在类中 Object

hashCode

public int hashCode()

已过时。

覆盖:

hashCode 在类中 Object

toString

public String toString()

已过时。

覆盖:

toString 在类中 Object