org.apache.calcite.sql

Enum JoinConditionType

java.lang.Object

java.lang.Enum<JoinConditionType>

org.apache.calcite.sql.JoinConditionType

All Implemented Interfaces:

Serializable, Comparable<JoinConditionType>, SqlLiteral.SqlSymbol

public enum JoinConditionType
extends Enum<JoinConditionType>
implements SqlLiteral.SqlSymbol

Enumerates the types of condition in a join expression.

Enum Constant Summary

Enum Constants

Enum Constant and Description
NONE Join clause has no condition, for example "FROM EMP, DEPT"
ON Join clause has an ON condition, for example "FROM EMP JOIN DEPT ON EMP.DEPTNO = DEPT.DEPTNO"
USING Join clause has a USING condition, for example "FROM EMP JOIN DEPT USING (DEPTNO)"

Method Summary

Methods

Modifier and Type	Method and Description
SqlLiteral	symbol(SqlParserPos pos) Creates a parse-tree node representing an occurrence of this join type at a particular position in the parsed text.
static JoinConditionType	valueOf(String name) Returns the enum constant of this type with the specified name.
static JoinConditionType[]	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

Methods inherited from interface org.apache.calcite.sql.SqlLiteral.SqlSymbol

name, ordinal

Enum Constant Detail

NONE

public static final JoinConditionType NONE

Join clause has no condition, for example "FROM EMP, DEPT"

ON

public static final JoinConditionType ON

Join clause has an ON condition, for example "FROM EMP JOIN DEPT ON EMP.DEPTNO = DEPT.DEPTNO"

USING

public static final JoinConditionType USING

Join clause has a USING condition, for example "FROM EMP JOIN DEPT USING (DEPTNO)"

Method Detail

values

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

Returns:

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

valueOf

public static JoinConditionType 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

symbol

public SqlLiteral symbol(SqlParserPos pos)

Creates a parse-tree node representing an occurrence of this join type at a particular position in the parsed text.