gudusoft.gsqlparser.resolver2

Enum ColumnLevel

Object

Enum<ColumnLevel>

gudusoft.gsqlparser.resolver2.ColumnLevel

All Implemented Interfaces:

Serializable, Comparable<ColumnLevel>

public enum ColumnLevel
extends Enum<ColumnLevel>

Three-level column existence check. Used for determining whether a column exists in a namespace and whether metadata is available to make that determination.

Enum Constant Summary

Enum Constants

Enum Constant and Description
EXISTS Column definitely exists (confirmed by metadata).
MAYBE Column might exist but cannot be confirmed (no metadata).
NOT_EXISTS Column definitely does not exist (metadata confirms absence).

Method Summary

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

EXISTS

public static final ColumnLevel EXISTS

Column definitely exists (confirmed by metadata). Confidence: 1.0

MAYBE

public static final ColumnLevel MAYBE

Column might exist but cannot be confirmed (no metadata). This is common for SELECT * scenarios without schema info. Confidence: typically 0.5-0.9 depending on evidence

NOT_EXISTS

public static final ColumnLevel NOT_EXISTS

Column definitely does not exist (metadata confirms absence). Confidence: 0.0

Method Detail

values

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

Returns:

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

valueOf

public static ColumnLevel 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