Github user paul-rogers commented on the issue:
https://github.com/apache/drill/pull/517
"Dynamic" meant "for each data value." "Static" meant "at compile time." We
make our type decisions at compile time. That is too early to adjust scale
based on actual input values. It is a real nuisance that scale is associated
with the type, not the value.
Dave filed a bug to track the additional issues. See DRILL-4834.
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