Package org.apache.flink.table.functions
Enum FunctionRequirement
- java.lang.Object
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- java.lang.Enum<FunctionRequirement>
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- org.apache.flink.table.functions.FunctionRequirement
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- All Implemented Interfaces:
Serializable
,Comparable<FunctionRequirement>
@PublicEvolving public enum FunctionRequirement extends Enum<FunctionRequirement>
Characteristics that aFunctionDefinition
requires.
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Enum Constant Summary
Enum Constants Enum Constant Description OVER_WINDOW_ONLY
Requirement that an aggregate function can only be applied in an OVER window.
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static FunctionRequirement
valueOf(String name)
Returns the enum constant of this type with the specified name.static FunctionRequirement[]
values()
Returns an array containing the constants of this enum type, in the order they are declared.
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Enum Constant Detail
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OVER_WINDOW_ONLY
public static final FunctionRequirement OVER_WINDOW_ONLY
Requirement that an aggregate function can only be applied in an OVER window.
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Method Detail
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values
public static FunctionRequirement[] 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 (FunctionRequirement c : FunctionRequirement.values()) System.out.println(c);
- Returns:
- an array containing the constants of this enum type, in the order they are declared
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valueOf
public static FunctionRequirement 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 nameNullPointerException
- if the argument is null
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