public enum PseudoColumnUsage extends Enum<PseudoColumnUsage>
Enum Constant and Description |
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NO_USAGE_RESTRICTIONS
伪/隐藏列的使用没有限制。
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SELECT_LIST_ONLY
伪/隐藏列只能在SELECT列表中使用。
|
USAGE_UNKNOWN
伪/隐藏列的使用无法确定。
|
WHERE_CLAUSE_ONLY
伪/隐藏列只能在WHERE子句中使用。
|
Modifier and Type | Method and Description |
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static PseudoColumnUsage |
valueOf(String name)
以指定的名称返回此类型的枚举常量。
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static PseudoColumnUsage[] |
values()
按照它们声明的顺序返回一个包含此枚举类型常量的数组。
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public static final PseudoColumnUsage SELECT_LIST_ONLY
public static final PseudoColumnUsage WHERE_CLAUSE_ONLY
public static final PseudoColumnUsage NO_USAGE_RESTRICTIONS
public static final PseudoColumnUsage USAGE_UNKNOWN
public static PseudoColumnUsage[] values()
for (PseudoColumnUsage c : PseudoColumnUsage.values())
System.out.println(c);
public static PseudoColumnUsage valueOf(String name)
name
- 要返回的枚举常数的名称。
IllegalArgumentException
- 如果此枚举类型没有指定名称的常量
NullPointerException
- 如果参数为空
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