Package org.apache.flink.table.legacy.api

Class TableColumn

java.lang.Object

org.apache.flink.table.legacy.api.TableColumn

Direct Known Subclasses:

TableColumn.ComputedColumn, TableColumn.MetadataColumn, TableColumn.PhysicalColumn

@Deprecated
@Internal
public abstract class TableColumn
extends Object

Deprecated.

See ResolvedSchema and Column.

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.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	TableColumn.ComputedColumn	Deprecated. Representation of a computed column.
static class	TableColumn.MetadataColumn	Deprecated. Representation of a metadata column.
static class	TableColumn.PhysicalColumn	Deprecated. Representation of a physical column.

Method Summary

Modifier and Type	Method	Description
String	asSummaryString()	Deprecated. Returns a string that summarizes this column for printing to a console.
static TableColumn.ComputedColumn	computed(String name, DataType type, String expression)	Deprecated. Creates a computed column that is computed from the given SQL expression.
boolean	equals(Object o)	Deprecated.
abstract Optional<String>	explainExtras()	Deprecated. Returns an explanation of specific column extras next to name and type.
String	getName()	Deprecated. Returns the name of this column.
DataType	getType()	Deprecated. Returns the data type of this column.
int	hashCode()	Deprecated.
abstract boolean	isPersisted()	Deprecated. Returns whether the given column is persisted in a sink operation.
abstract boolean	isPhysical()	Deprecated. Returns whether the given column is a physical column of a table; neither computed nor metadata.
static TableColumn.MetadataColumn	metadata(String name, DataType type)	Deprecated. Creates a metadata column from metadata of the given column name.
static TableColumn.MetadataColumn	metadata(String name, DataType type, boolean isVirtual)	Deprecated. Creates a metadata column from metadata of the given column name.
static TableColumn.MetadataColumn	metadata(String name, DataType type, String metadataAlias)	Deprecated. Creates a metadata column from metadata of the given alias.
static TableColumn.MetadataColumn	metadata(String name, DataType type, String metadataAlias, boolean isVirtual)	Deprecated. 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)	Deprecated. Use physical(String, DataType) instead.
static TableColumn	of(String name, DataType type, String expression)	Deprecated. Use computed(String, DataType, String) instead.
static TableColumn.PhysicalColumn	physical(String name, DataType type)	Deprecated. Creates a regular table column that represents physical data.
String	toString()	Deprecated.

Methods inherited from class java.lang.Object

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

Method Detail

physical

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

Deprecated.

Creates a regular table column that represents physical data.

computed

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

Deprecated.

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

metadata

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

Deprecated.

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)

Deprecated.

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)

Deprecated.

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)

Deprecated.

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)

Deprecated.

Use physical(String, DataType) instead.

of

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

Deprecated.

Use computed(String, DataType, String) instead.

isPhysical

public abstract boolean isPhysical()

Deprecated.

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

isPersisted

public abstract boolean isPersisted()

Deprecated.

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

getType

public DataType getType()

Deprecated.

Returns the data type of this column.

getName

public String getName()

Deprecated.

Returns the name of this column.

asSummaryString

public String asSummaryString()

Deprecated.

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

explainExtras

public abstract Optional<String> explainExtras()

Deprecated.

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

equals

public boolean equals(Object o)

Deprecated.

Overrides:

equals in class Object

hashCode

public int hashCode()

Deprecated.

Overrides:

hashCode in class Object

toString

public String toString()

Deprecated.

Overrides:

toString in class Object