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https://issues.apache.org/jira/browse/CALCITE-1466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17907928#comment-17907928
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Mihai Budiu commented on CALCITE-1466:
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I expect this will be a lot of work.
Java does not support unsigned types, so building the correct runtime support
for this will be very difficult.
Moreover, you have to choose what happens on overflows, and on conversions
between signed and unsigned that would overflow the target type. I don't know
if there is any guidance in the SQL standard.
> Support for UNSIGNED types of int,long,float etc. in type system
> ----------------------------------------------------------------
>
> Key: CALCITE-1466
> URL: https://issues.apache.org/jira/browse/CALCITE-1466
> Project: Calcite
> Issue Type: Bug
> Components: avatica
> Reporter: Rajeshbabu Chintaguntla
> Assignee: Zhengqiang Duan
> Priority: Major
>
> There are some data bases like MySQL supporting unsigned data types. Apache
> Phoenix also supports them. Would be great to add them to calcite as well.
> http://dev.mysql.com/doc/refman/5.7/en/integer-types.html
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