gudusoft.gsqlparser.ir.semantic.joinanalysis

Enum PredicateKind

Object

Enum<PredicateKind>

gudusoft.gsqlparser.ir.semantic.joinanalysis.PredicateKind

All Implemented Interfaces:

Serializable, Comparable<PredicateKind>

public enum PredicateKind
extends Enum<PredicateKind>

Classification of a Predicate extracted from an ON or WHERE condition.

• EQUI — left = right.
• NON_EQUI — <>, >, >=, <, <=.
• RANGE — BETWEEN (and range-style shapes).
• NULL_CHECK — IS NULL / IS NOT NULL.
• CALL — a function/expression call comparison whose operand(s) are not a bare column (e.g. lower(a.n) = lower(b.n)).
• COMPLEX — any shape not decomposed into the above; the sub-tree is preserved as a PredicateOperand, never dropped.

Provisional in join-analysis slice 162 (S1); re-confirmed against the real EExpressionType values in slice 166 (S5).

Enum Constant Summary

Enum Constants

Enum Constant and Description
CALL
COMPLEX
EQUI
NON_EQUI
NULL_CHECK
RANGE

Method Summary

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

EQUI

public static final PredicateKind EQUI

NON_EQUI

public static final PredicateKind NON_EQUI

RANGE

public static final PredicateKind RANGE

NULL_CHECK

public static final PredicateKind NULL_CHECK

CALL

public static final PredicateKind CALL

COMPLEX

public static final PredicateKind COMPLEX

Method Detail

values

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

Returns:

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

valueOf

public static PredicateKind 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