The idea quickly spread, and Todd made a wise decision to set up Little Free Library as a non-profit organization with signs that read "Little Free Library: Take a Book, Return a Book."
Usage: This parameter controls the decision on whether or not to apply a NON EMPTY clause on member requests when the number of tuples exceeds the set threshold.
用法：当元组数超过设定的阈值时，该参数控制是否对成员请求应用NON empty子句的决策。
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Usage: This parameter controls the decision on when the NON EMPTY clause is applied to the query MDX.