我在使用createPartitionedTable创建分区表时时，参数设置成了sortColumns='date', keepDuplicates='LAST'。产生了以下报错：
Usage: createPartitionedTable(dbHandle, table, tableName, partitionColumns, [compressMethods], [sortColumns], [keepDuplicates=ALL], [sortKeyMappingFunction]). Can't use duplicate policy LAST or FIRST when the number of sort keys is less than 2.'
请问是必须要有至少两个sort keys才可以吗？
