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Xiaoguang Zhang edited comment on CALCITE-3261 at 8/20/19 1:14 PM: ------------------------------------------------------------------- Thanks [~danny0405], [~julianhyde] for replaying. I agree with [~julianhyde] that this is indeed not an incorrect behavior, it's more of a potential improvement. The issue type is marked as "Improvement" but the title is misleading, I'll change it later. I've did more tests and it shows that the column labels are `min(e.empid)` from both MySQL CLI and JDBC driver. Besides, from a user's perspective, I think `min(e.empid)` is more friendly. What do you think? Seems like this is a nice-to-have issue, I would like to give it a try if you don't mind. was (Author: zhxiaog): Thanks [~danny0405] [~julianhyde] for replaying. I agree with [~julianhyde] that this is indeed not a incorrect behavior, it's more of a potential improvement. The issue type is marked as "Improvement" but the title is misleading, I'll change it later. I've did more tests and it shows that the column labels are `min(e.empid)` from both MySQL CLI and JDBC driver. Besides, from a user's perspective, I think `min(e.empid)` is more friendly. What do you think? Seems like this is a nice-to-have issue, I would like to give it a try if you don't mind. > Make JDBC output column labels more human readable > -------------------------------------------------- > > Key: CALCITE-3261 > URL: https://issues.apache.org/jira/browse/CALCITE-3261 > Project: Calcite > Issue Type: Improvement > Components: core, jdbc-adapter > Reporter: Xiaoguang zhang > Priority: Major > > After implementing the missing `print(ResultSet)` method from the examples in > Calcite [tutorial|[https://calcite.apache.org/docs/index.html]], I found that > the output field names are incorrect: > {code:java} > [deptno, EXPR$1] > [1, 1] > [2, 2] > {code} > The field name `EXPR$1` can be improved to be more human readable like MySQL > client: > {code:java} > +--------+--------------+ > | deptno | min(e.empid) | > +--------+--------------+ > | 1 | 1 | > | 2 | 2 | > +--------+--------------+ > {code} > > PS: the sql statement generating the above outputs: > {code:sql} > select d.deptno, min(e.empid) from hr.emps as e join hr.depts as d on > e.deptno = d.deptno group by d.deptno having count(*) > 1 > {code} -- This message was sent by Atlassian Jira (v8.3.2#803003)