No worries, Juan Pan, welcome to contribute to Apache Calcite. Calcite always put the JIRA issues in the first place instead of GitHub page because it is really food for bug/problem tracing.
If you have any questions or want to discuss something, welcome to send mail into the DEV mailing list. If it is a known bug or promotion, feel free to fire a JIRA issue and we move the discussion there. The committers would help you and what you need to do is describe your problems/cases clearly in the JIRA issue. Best, Danny Chan 在 2019年9月29日 +0800 PM3:23，Juan Pan <panj...@apache.org>，写道： > Actually, i think this problem should be already raised by others, for it is > obvious enough. But i visited Calcite gitHub, and can not find issue list, so > i sent this email. Yes, Calcite is using Jira for issues, i got. > > > Given Calcite implements the interfaces of ResultSetMetadata, ResultSet and > so on, it should return the real columnName or columnLabel from SQL, not the > parsing expr(?) which is somewhat... strange to users. When i first got the > result `EXPR$0`, i doubted whether my program went wrong? > > > Recently, i am exploring Calcite, and i’d like to do some contributions to > Calcite community if i can. But.. for a new one, it seems difficult. > > > Regard, > Trista > > > Juan Pan > > > panj...@apache.org > Juan Pan(Trista), Apache ShardingSphere > > > On 09/29/2019 14:48，Danny Chan<yuzhao....@gmail.com> wrote： > There is already a JIRA issue to trace this problem[1], maybe we can move the > discussion to there. > > [1] https://issues.apache.org/jira/browse/CALCITE-3261 > > Best, > Danny Chan > 在 2019年9月29日 +0800 AM11:39，Juan Pan <panj...@apache.org>，写道： > > > Hi everyone, > > > I executed SQL `select count(*) from tb1` through Calcite and > resultSet.getMetaData().getColumnName(i) in my project. But the result is > `EXPR$0` not `COUNT(*)`. > > > Is there any way to get real columnName? > > > Thanks for your attention. > > > Regard, > Trista > > > > > Juan Pan > > > panj...@apache.org > Juan Pan(Trista), Apache ShardingSphere >
