Package org.apache.shardingsphere.infra.binder.segment.select.projection

Enum DerivedColumn

java.lang.Object

java.lang.Enum<DerivedColumn>

org.apache.shardingsphere.infra.binder.segment.select.projection.DerivedColumn

All Implemented Interfaces:

Serializable, Comparable<DerivedColumn>

public enum DerivedColumn
extends Enum<DerivedColumn>

Derived column alias.

Enum Constant Summary

Enum Constants

Enum Constant	Description
AGGREGATION_DISTINCT_DERIVED
AVG_COUNT_ALIAS
AVG_SUM_ALIAS
GROUP_BY_ALIAS
ORDER_BY_ALIAS

Method Summary

Modifier and Type	Method	Description
String	getDerivedColumnAlias(int derivedColumnCount)	Get alias of derived column.
static boolean	isDerivedColumn(String columnName)	Judge is derived column or not.
static boolean	isDerivedColumnName(String columnName)	Judge is derived column name or not.
static DerivedColumn	valueOf(String name)	Returns the enum constant of this type with the specified name.
static DerivedColumn[]	values()	Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

AVG_COUNT_ALIAS

public static final DerivedColumn AVG_COUNT_ALIAS

AVG_SUM_ALIAS

public static final DerivedColumn AVG_SUM_ALIAS

ORDER_BY_ALIAS

public static final DerivedColumn ORDER_BY_ALIAS

GROUP_BY_ALIAS

public static final DerivedColumn GROUP_BY_ALIAS

AGGREGATION_DISTINCT_DERIVED

public static final DerivedColumn AGGREGATION_DISTINCT_DERIVED

Method Detail

values

public static DerivedColumn[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (DerivedColumn c : DerivedColumn.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static DerivedColumn valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null

getDerivedColumnAlias

public String getDerivedColumnAlias(int derivedColumnCount)

Get alias of derived column.

Parameters:

derivedColumnCount - derived column count

Returns:

alias of derived column

isDerivedColumnName

public static boolean isDerivedColumnName(String columnName)

Judge is derived column name or not.

Parameters:

columnName - column name to be judged

Returns:

is derived column name or not

isDerivedColumn

public static boolean isDerivedColumn(String columnName)

Judge is derived column or not.

Parameters:

columnName - column name to be judged

Returns:

is derived column or not