org.apache.calcite.sql.babel

Enum TableCollectionType

java.lang.Object

java.lang.Enum<TableCollectionType>

org.apache.calcite.sql.babel.TableCollectionType

All Implemented Interfaces:

Serializable, Comparable<TableCollectionType>

public enum TableCollectionType
extends Enum<TableCollectionType>

Enumerates the collection type of a table: MULTISET allows duplicates and SET does not.

This feature is supported in Teradata, which originally required rows in a table to be unique, and later added the MULTISET keyword to its CREATE TABLE command to allow the duplicate rows.

In other databases and in the SQL standard, MULTISET is the only supported option, so there is no explicit syntax.

Enum Constant Summary

Enum Constants

Enum Constant and Description
MULTISET Duplicate rows are permitted, in compliance with the ANSI SQL:2011 standard.
SET Duplicate rows are not permitted.
UNSPECIFIED Table collection type is not specified.

Method Summary

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

UNSPECIFIED

public static final TableCollectionType UNSPECIFIED

Table collection type is not specified.

Defaults to MULTISET in ANSI mode, and SET in Teradata mode.

SET

public static final TableCollectionType SET

Duplicate rows are not permitted.

MULTISET

public static final TableCollectionType MULTISET

Duplicate rows are permitted, in compliance with the ANSI SQL:2011 standard.

Method Detail

values

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

Returns:

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

valueOf

public static TableCollectionType 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