org.apache.calcite.sql

Enum TableCharacteristic.Semantics

java.lang.Object

java.lang.Enum<TableCharacteristic.Semantics>

org.apache.calcite.sql.TableCharacteristic.Semantics

All Implemented Interfaces:

Serializable, Comparable<TableCharacteristic.Semantics>

Enclosing class:

TableCharacteristic

public static enum TableCharacteristic.Semantics
extends Enum<TableCharacteristic.Semantics>

Input table has either row semantics or set semantics.

Enum Constant Summary

Enum Constants

Enum Constant and Description
ROW Row semantics means that the result of the Window TableFunction is decided on a row-by-row basis.
SET Set semantics means that the outcome of the Window TableFunction depends on how the data is partitioned.

Method Summary

Modifier and Type	Method and Description
static TableCharacteristic.Semantics	valueOf(String name) Returns the enum constant of this type with the specified name.
static TableCharacteristic.Semantics[]	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

ROW

public static final TableCharacteristic.Semantics ROW

Row semantics means that the result of the Window TableFunction is decided on a row-by-row basis. As an extreme example, the DBMS could atomize the input table into individual rows, and send each single row to a different virtual processor.

SET

public static final TableCharacteristic.Semantics SET

Set semantics means that the outcome of the Window TableFunction depends on how the data is partitioned. A partition may not be split across virtual processors, nor may a virtual processor handle more than one partition.

Method Detail

values

public static TableCharacteristic.Semantics[] 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 (TableCharacteristic.Semantics c : TableCharacteristic.Semantics.values())
    System.out.println(c);

Returns:

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

valueOf

public static TableCharacteristic.Semantics 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