HeLifu created KUDU-2803:
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Summary: support non-primary key type alteration
Key: KUDU-2803
URL: https://issues.apache.org/jira/browse/KUDU-2803
Project: Kudu
Issue Type: Improvement
Reporter: HeLifu
We know that kudu does not allow the type of a column to be altered right now.
But indeed, a very common case is RDMS -> kudu, and there will be type
alterations inevitably.
Currently, here are two ways to get rid of this problem:
# for the newly tables: predefine a big type for every column;
# for the existing tables: stop app(write) -> add a new column with new type
-> copy data -> drop old column -> rename new column to old column -> start app;
However, neither of them is elegant. So, is it possible to support non-primary
key type alteration?
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