Package org.apache.calcite.sql

Enum SemiJoinType

java.lang.Object

java.lang.Enum<SemiJoinType>

org.apache.calcite.sql.SemiJoinType

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<SemiJoinType>

public enum SemiJoinType
extends java.lang.Enum<SemiJoinType>

Enumeration representing different join types used in correlation relations.

Enum Constant Summary

Enum Constants

Enum Constant	Description
ANTI	Anti-join
INNER	Inner join
LEFT	Left-outer join
SEMI	Semi-join

Field Summary

Fields

Modifier and Type	Field	Description
java.lang.String	lowerName	Lower-case name.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	SemiJoinType()

Method Summary

Modifier and Type	Method	Description
static SemiJoinType	of(JoinRelType joinType)
boolean	returnsJustFirstInput()
SqlLiteral	symbol(SqlParserPos pos)	Creates a parse-tree node representing an occurrence of this condition type keyword at a particular position in the parsed text.
JoinRelType	toJoinType()
CorrelateJoinType	toLinq4j()
static SemiJoinType	valueOf(java.lang.String name)	Returns the enum constant of this type with the specified name.
static SemiJoinType[]	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

INNER

public static final SemiJoinType INNER

Inner join

LEFT

public static final SemiJoinType LEFT

Left-outer join

SEMI

public static final SemiJoinType SEMI

Semi-join

Similar to from A ... where a in (select b from B ...)

ANTI

public static final SemiJoinType ANTI

Anti-join

Similar to from A ... where a NOT in (select b from B ...)

Note: if B.b is nullable and B has nulls, no rows must be returned

Field Detail

lowerName

public final java.lang.String lowerName

Lower-case name.

Constructor Detail

SemiJoinType

private SemiJoinType()

Method Detail

values

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

Returns:

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

valueOf

public static SemiJoinType valueOf(java.lang.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:

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

java.lang.NullPointerException - if the argument is null

symbol

public SqlLiteral symbol(SqlParserPos pos)

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

of

public static SemiJoinType of(JoinRelType joinType)

toJoinType

public JoinRelType toJoinType()

toLinq4j

public CorrelateJoinType toLinq4j()

returnsJustFirstInput

public boolean returnsJustFirstInput()