If no column name given explicitly, e.g. by alias or simple identifier, Calcite will derive one but not from the aggregate function.
Juan Pan <panj...@apache.org> 于2019年9月29日周日 下午1:12写道： > Thank for your reply. It is a indirect way to get columnName. > > > Calcite can not return the real columnName from SQL, is it right? > > > Juan Pan > > > panj...@apache.org > Juan Pan(Trista), Apache ShardingSphere > > > On 09/29/2019 12:21，XING JIN<jinxing.co...@gmail.com> wrote： > You can try to give an alias for the selected column. > > Juan Pan <panj...@apache.org> 于2019年9月29日周日 上午11:39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 > > >
