org.apache.flink.table.types.inference

接口 ArgumentCount

所有已知实现类:

ConstantArgumentCount

@PublicEvolving
public interface ArgumentCount

Defines the count of accepted arguments (including open intervals) that a function can take.

Note: Implementations should implement Object.hashCode() and Object.equals(Object).

方法概要

限定符和类型	方法和说明
Optional<Integer>	getMaxCount() Returns the maximum number of argument (inclusive) that a function can take.
Optional<Integer>	getMinCount() Returns the minimum number of argument (inclusive) that a function can take.
boolean	isValidCount(int count) Enables custom validation of argument counts after getMinCount() and getMaxCount() have been validated.

方法详细资料

isValidCount

boolean isValidCount(int count)

Enables custom validation of argument counts after getMinCount() and getMaxCount() have been validated.

参数:

count - total number of arguments including each argument for a vararg function call

getMinCount

Optional<Integer> getMinCount()

Returns the minimum number of argument (inclusive) that a function can take.

Optional.empty() if such a lower bound is not defined.

getMaxCount

Optional<Integer> getMaxCount()

Returns the maximum number of argument (inclusive) that a function can take.

Optional.empty() if such an upper bound is not defined.