No, it's actually the opposite: Tables with bounded range partitions defined with upper/lower bounds can have partitions added to it. Tables with unbounded range partitions defined with a single value cannot be extended in today's Kudu. From the range partitioning docs: "The second example [with upper/lower bounds specified] is more flexible than the first [with a split defined], because it allows range partitions for future years to be added to the table. In the first example, all writes for times after 2016-01-01 will fall into the last partition, so the partition may eventually become too large for a single tablet server to handle."
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