Note: These parameters count in the NUMBER of parameters clause but they do not appear as parameters of the federated procedure.
注:NUMBER OF parameters子句中考虑这些参数,但是它们不作为联邦过程的参数出现。
2
The LIMIT clause is helpful when you want to limit the number of records returned by an SQL statement.
想要限制一个 SQL 语句返回的记录数,可以使用 LIMIT 子句。
3
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.