gudusoft.gsqlparser.ir.semantic

Enum SetOperator

Object

Enum<SetOperator>

gudusoft.gsqlparser.ir.semantic.SetOperator

All Implemented Interfaces:

Serializable, Comparable<SetOperator>

public enum SetOperator
extends Enum<SetOperator>

Set-operation kind on a StatementGraph. Non-null only on the outer statement of a set-op program (slice 12); null on every regular SELECT statement, every CTE / FROM-subquery / scalar / set-op-branch body.

The enum encodes both the operator and the ALL flag: UNION vs UNION_ALL, INTERSECT vs INTERSECT_ALL, MINUS vs MINUS_ALL, EXCEPT vs EXCEPT_ALL.

MINUS (Oracle / Spark / Hive) and EXCEPT (PostgreSQL / SQL Server / standard) are kept distinct because the parser exposes them as separate ESetOperatorType values; preserving the dialect signal at no cost. They are semantically equivalent but lexically distinguishable.

UNION DISTINCT (BigQuery / MySQL) is mapped to UNION by the builder — it is a syntactic alias for the default UNION, not a separate semantic.

Enum Constant Summary

Enum Constants

Enum Constant and Description
EXCEPT
EXCEPT_ALL
INTERSECT
INTERSECT_ALL
MINUS
MINUS_ALL
UNION
UNION_ALL

Method Summary

Modifier and Type	Method and Description
static SetOperator	valueOf(String name) Returns the enum constant of this type with the specified name.
static SetOperator[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class Enum

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

Methods inherited from class Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

UNION

public static final SetOperator UNION

UNION_ALL

public static final SetOperator UNION_ALL

INTERSECT

public static final SetOperator INTERSECT

INTERSECT_ALL

public static final SetOperator INTERSECT_ALL

MINUS

public static final SetOperator MINUS

MINUS_ALL

public static final SetOperator MINUS_ALL

EXCEPT

public static final SetOperator EXCEPT

EXCEPT_ALL

public static final SetOperator EXCEPT_ALL

Method Detail

values

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

Returns:

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

valueOf

public static SetOperator 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