gudusoft.gsqlparser.ir.semantic

Enum RelationKind

Object

Enum<RelationKind>

gudusoft.gsqlparser.ir.semantic.RelationKind

All Implemented Interfaces:

Serializable, Comparable<RelationKind>

public enum RelationKind
extends Enum<RelationKind>

Classification of a relation source in RelationSource.

Slice 1 only emits TABLE. CTE / SUBQUERY / UNION are reserved for later slices and exist here so the JSON shape does not change when those cases land.

Slice 14 added OUTER_REFERENCE: a synthesised relation an inner statement carries to model an alias actually owned by an enclosing scope. Slice 15 extends OUTER_REFERENCE so the binding's outerKind (set via the 3-arg RelationBinding constructor) records what the outer relation is really bound to: one of {TABLE, CTE, SUBQUERY}. Canonical-edge emission dispatches through that resolved kind so CTE / SUBQUERY outer correlations BFS the outer body to base columns just like non-correlated CTE / SUBQUERY relations do.

Enum Constant Summary

Enum Constants

Enum Constant and Description
CTE
OUTER_REFERENCE
SUBQUERY
TABLE
UNION
UNKNOWN

Method Summary

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

TABLE

public static final RelationKind TABLE

CTE

public static final RelationKind CTE

SUBQUERY

public static final RelationKind SUBQUERY

UNION

public static final RelationKind UNION

UNKNOWN

public static final RelationKind UNKNOWN

OUTER_REFERENCE

public static final RelationKind OUTER_REFERENCE

Method Detail

values

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

Returns:

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

valueOf

public static RelationKind 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