Andrew Wong created KUDU-3203:
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Summary: Allow clients to support reading decimals with wider
bit-width
Key: KUDU-3203
URL: https://issues.apache.org/jira/browse/KUDU-3203
Project: Kudu
Issue Type: Improvement
Components: client
Reporter: Andrew Wong
Today, decimal bit-width is entirely determined by Kudu. When creating a schema
of a given precision and scale, Kudu determines the correct bit-width for the
parameters, and uses that to store values.
Client scanners can only specify reading DECIMAL (ignorant of bit-width). In
requesting the columnar layout, however, it'd be nice if client scanners could
also specify the desired bit-width to get back from tservers, and have the
tservers inflate values as appropriate. This would be helpful, e.g. to read
DECIMAL32- and DECIMAL64-stored data in Arrow, which currently only supports
DECIMAL128 and DECIMAL256.
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